Anthracite , also known as hard coal and black coal , is a hard, compact variety of coal that has a submetallic lustre . It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.
98-851: The Western Middle Anthracite Field is a large basin containing veins of anthracite coal in Pennsylvania . The region is in the Appalachian Mountains and is the third-largest anthracite field in the anthracite region in Eastern Pennsylvania behind the Southern and Northern Fields. The field is located above the Southern Anthracite Field strays between Schuylkill County, Pennsylvania and Northumberland County, Pennsylvania in Central Eastern Pennsylvania. Much of
196-500: A smokeless fuel . HG and UHG anthracite account for a small percentage of the total anthracite market. The major producing countries are Russia, Ukraine, Vietnam, South Africa and the US. The primary sizes used in the United States for domestic heating are Chestnut, Pea, Buckwheat and Rice, with Chestnut and Rice being the most popular. Chestnut and Pea are used in hand fired furnaces while
294-530: A cross argent'). According to legend Saint Piran adopted these colours from seeing the white tin in the black coals and ashes during his discovery of tin. The Cornish flag is an exact reverse of the former Breton black cross national flag and is known by the same name " Kroaz Du ". Since the 19th century, Cornwall, with its unspoilt maritime scenery and strong light, has sustained a vibrant visual art scene of international renown. Artistic activity within Cornwall
392-519: A domestic fuel since at least medieval times, when it was mined near Saundersfoot . More recently, large-scale mining of anthracite took place across the western part of the South Wales Coalfield until the late 20th century. In the United States, anthracite coal history began in 1790 in Pottsville, Pennsylvania , with the discovery of coal made by the hunter Necho Allen in what is now known as
490-659: A fireplace. Anthracite differs from wood in that it needs a draft from the bottom, and Judge Fell proved with his grate design that it was a viable heating fuel. In spring 1808, John and Abijah Smith shipped the first commercially mined load of anthracite down the Susquehanna River from Plymouth, Pennsylvania, marking the birth of commercial anthracite mining in the United States. From that first mine, production rose to an all-time high of over 100 million tons in 1917. The difficulty of igniting anthracite inhibited its early use, especially in blast furnaces for smelting iron. With
588-517: A first language in the late 18th century. In the 20th and 21st centuries, it has been revived by a small number of speakers. It is closely related to the other Brythonic languages ( Breton and Welsh ), and less so to the Goidelic languages . Cornish has no legal status in the UK. There has been a revival of the language by academics and optimistic enthusiasts since the mid-19th century that gained momentum from
686-588: A hotbed of the United Mine Workers Union . In 1902 President Theodore Roosevelt had to send U.S. National Guard troops to the region during the Coal Strike of 1902 and laid out his new precedent on solving labor disputes, holding both the company and its workers in equal regard. This Pennsylvania state location article is a stub . You can help Misplaced Pages by expanding it . Anthracite The Coal Region of Northeastern Pennsylvania in
784-725: A large part of the Cornwall National Landscape . The national landscape also includes Bodmin Moor , an upland outcrop of the Cornubian batholith granite formation. The county contains many short rivers; the longest is the Tamar , which forms the border with Devon. Cornwall had a minor Roman presence, and later formed part of the Brittonic kingdom of Dumnonia . From the 7th century, the Britons in
882-661: A large urban centre in south west Devon, is an important location for services such as hospitals, department stores, road and rail transport, and cultural venues, particularly for people living in east Cornwall. Cardiff and Swansea , across the Bristol Channel, have at some times in the past been connected to Cornwall by ferry, but these do not operate now. The Isles of Scilly are served by ferry (from Penzance) and by aeroplane, having its own airport: St Mary's Airport . There are regular flights between St Mary's and Land's End Airport , near St Just, and Newquay Airport ; during
980-412: A minimum carbon content of 95%. They also differ in usage from standard grade anthracite (used mainly for power generation), being employed mainly in metallurgy as a cost-efficient substitute for coke in processes such as sintering and pelletising , as well as pulverised coal injection (PCI) and direct injection into blast furnaces . They can also be used in water purification and domestically as
1078-709: A raid from the Tamar to Land's End, and the end of Cornish independence. However, the Anglo-Saxon Chronicle states that in 825 (adjusted date) a battle took place between the Wealas (Cornish) and the Defnas (men of Devon) at Gafulforda . The Cornish giving battle here, and the later battle at Hingston Down, casts doubt on any claims of control Wessex had at this stage. In 838, the Cornish and their Danish allies were defeated by Egbert in
SECTION 10
#17328700959291176-623: A result, in 2005 its promoters received limited government funding. Several words originating in Cornish are used in the mining terminology of English, such as costean , gossan , gunnies , kibbal, kieve and vug . The Cornish language and culture influenced the emergence of particular pronunciations and grammar not used elsewhere in England. The Cornish dialect is spoken to varying degrees; however, someone speaking in broad Cornish may be practically unintelligible to one not accustomed to it. Cornish dialect has generally declined, as in most places it
1274-500: A transition stage between ordinary bituminous coal and graphite , produced by the more or less complete elimination of the volatile constituents of the former, and it is found most abundantly in areas that have been subjected to considerable stresses and pressures, such as the flanks of great mountain ranges. Anthracite is associated with strongly deformed sedimentary rocks that were subjected to higher pressures and temperatures (but short of metamorphic conditions) just as bituminous coal
1372-539: A very infertile soil which covers the flat and marshy heaths of the interior of the peninsula. This is home to rare plants, such as the Cornish Heath , which has been adopted as the county flower . Cornwall's only city, and the home of the council headquarters , is Truro. Nearby Falmouth is notable as a port. St Just in Penwith is the westernmost town in England, though the same claim has been made for Penzance , which
1470-711: Is a ceremonial county in South West England . It is recognised by Cornish and Celtic political groups as one of the Celtic nations , and is the homeland of the Cornish people . The county is bordered by the Atlantic Ocean to the north and west, Devon to the east, and the English Channel to the south. The largest urban area in the county is a conurbation that includes the former mining towns of Redruth and Camborne , and
1568-551: Is also being mined. Countries producing HG and UHG anthracite include Russia and South Africa. HG and UHG anthracite are used as a coke or coal substitute in various metallurgical coal applications ( sintering , PCI , direct BF charge, pelletizing ). It plays an important role in cost reduction in the steel making process and is also used in production of ferroalloys , silicomanganese, calcium carbide and silicon carbide . South Africa exports lower-quality, higher-ash anthracite to Brazil to be used in steel-making. Anthracite
1666-435: Is also free from included soft or fibrous notches and does not soil the fingers when rubbed. Anthracitization is the transformation of bituminous coal into anthracite. The moisture content of fresh-mined anthracite generally is less than 15 percent. The heat content of anthracite ranges from 26 to 33 MJ/kg (22 to 28 million Btu / short ton ) on a moist, mineral-matter-free basis. The heat content of anthracite coal consumed in
1764-403: Is by F. H. Davey Flora of Cornwall (1909). Davey was assisted by A. O. Hume and he thanks Hume, his companion on excursions in Cornwall and Devon, and for help in the compilation of that Flora, publication of which was financed by him. Cornwall has a temperate Oceanic climate ( Köppen climate classification : Cfb ), with mild winters and cool summers. Cornwall has the mildest and one of
1862-408: Is classified into three grades, depending on its carbon content. Standard grade is used as a domestic fuel and in industrial power-generation. The rarer higher grades of anthracite are purer – i.e., they have a higher carbon content – and are used in steel-making and other segments of the metallurgical industries. Technical characteristics of the various grades of anthracite are as follows: Anthracite
1960-558: Is divided by size mainly into applications that need lumps (typically larger than 10 mm) – various industrial processes where it replaces metallurgical coke , and domestic fuel – and those that need fines (less than 10 mm), such as sintering and pelletising. The common American classification by size is as follows: Lump, steamboat, egg and stove coals, the latter in two or three sizes, all three being above 1 + 1 ⁄ 2 in (38 mm) size on round-hole screens. High grade (HG) and ultra high grade (UHG) anthracite are
2058-579: Is documented in a dedicated online journal. Local television programmes are provided by BBC South West & ITV West Country . Radio programmes are produced by BBC Radio Cornwall in Truro for the entire county, Heart West , Source FM for the Falmouth and Penryn areas, Coast FM for west Cornwall, Radio St Austell Bay for the St Austell area, NCB Radio for north Cornwall & Pirate FM . Cornwall has
SECTION 20
#17328700959292156-503: Is fed oxygen by vent paths that have not yet been discovered. These can smolder for years. Commonly, exhaust vents in populated areas are soon sensed and are sealed while vents in uninhabited areas remain undiscovered. Occasionally, vents are discovered via fumes sensed by passers-by, often in forested areas. Attempts to extinguish those remaining have at times been futile, and several such combustion areas exist today. The existence of an underground combustion site can sometimes be identified in
2254-585: Is found in the Lackawanna Coal Mine in northeastern Pennsylvania , United States in and around Scranton , Pennsylvania. Locally called the Coal Region , the deposit contains 480 square miles (1,200 km ) of coal-bearing rock which originally held 22.8 billion short tons (20.68 billion tonnes) of anthracite. The geographic region is roughly 100 miles (161 km) in length and 30 miles (48 km) in width. Because of historical mining and development of
2352-401: Is generally associated with less deformed or flat-lying sedimentary rocks. The compressed layers of anthracite that are deep mined in the folded Ridge and Valley Province of the Appalachian Mountains of the Coal Region of East-central Pennsylvania are extensions of the same layers of bituminous coal that are mined on the generally flat lying and undeformed sedimentary rocks further west on
2450-426: Is larger. St Ives and Padstow are today small vessel ports with a major tourism and leisure sector in their economies. Newquay on the north coast is another major urban settlement which is known for its beaches and is a popular surfing destination, as is Bude further north, but Newquay is now also becoming important for its aviation-related industries. Camborne is the county's largest town and more populous than
2548-416: Is now little more than a regional accent and grammatical differences have been eroded over time. Marked differences in vocabulary and usage still exist between the eastern and western parts of Cornwall. Saint Piran 's Flag is the national flag and ancient banner of Cornwall, and an emblem of the Cornish people. The banner of Saint Piran is a white cross on a black background (in terms of heraldry 'sable,
2646-546: Is of standard-grade anthracite, which is used in power generation. Increased demand in China has made that country into a net importer of the fuel, mostly from Vietnam, another major producer of anthracite for power generation, although increasing domestic consumption in Vietnam means that exports may be scaled back. Current U.S. anthracite production averages around five million tons per year. Of that, about 1.8 million tons were mined in
2744-399: Is processed into different sizes by what is commonly referred to as a breaker . The large coal is raised from the mine and passed through breakers with toothed rolls to reduce the lumps to smaller pieces. The smaller pieces are separated into different sizes by a system of graduated sieves, placed in descending order. Sizing is necessary for different types of stoves and furnaces. Anthracite
2842-453: Is similar in appearance to the mineraloid jet and is sometimes used as a jet imitation. Anthracite differs from ordinary bituminous coal by its greater hardness (2.75–3 on the Mohs scale ), its higher relative density of 1.3–1.4, and luster, which is often semi-metallic with a mildly green reflection. It contains a high percentage of fixed carbon and a low percentage of volatile matter. It
2940-548: Is sold in the United Kingdom under trade names such as Phurnacite , Ancit and Taybrite. On the opposite end from high-grade anthracite coal, semianthracite coal is defined as a coal which is intermediate between anthracite coal and bituminous coal, and particularly a coal which approaches anthracite in nonvolatile character. Historically, from time to time, underground seams of coal have caught fire, often from careless or unfortunate mining activities. The pocket of ignited coal
3038-550: Is the term for a once-popular and trademarked brand of anthracite, mined by the Glen Alden Coal Company in Pennsylvania , and sprayed with a blue dye at the mine before shipping to its Northeastern U.S. markets to distinguish it from its competitors. Culm has different meanings in British and American English . In British English, culm is the imperfect anthracite, located predominantly north Devon and Cornwall , which
Western Middle Anthracite Field - Misplaced Pages Continue
3136-845: Is the world's largest previously undeveloped anthracite deposit. It is owned by the Australian publicly-traded company Atrum Coal and has 1.57 billion tonnes of high grade anthracite. Anthracites of newer Tertiary or Cretaceous age are found in the Crowsnest Pass part of the Rocky Mountains in Canada and at various places in the Andes in Peru. Cornwall Cornwall ( / ˈ k ɔːr n w ɔː l , - w əl / ; Cornish : Kernow ; Cornish pronunciation: [ˈkɛrnɔʊ] ; or [ˈkɛrnɔ] )
3234-518: The Anglo-Saxon Chronicle in 891 as On Corn walum . In the Domesday Book it was referred to as Cornualia and in c. 1198 as Cornwal . Other names for the county include a latinisation of the name as Cornubia (first appears in a mid-9th-century deed purporting to be a copy of one dating from c. 705), and as Cornugallia in 1086. Cornwall forms the tip of the south-west peninsula of
3332-633: The A30 which connects Cornwall to the M5 motorway at Exeter , crosses the border south of Launceston , crosses Bodmin Moor and connects Bodmin, Truro, Redruth, Camborne, Hayle and Penzance. Torpoint Ferry links Plymouth with Torpoint on the opposite side of the Hamoaze . A rail bridge, the Royal Albert Bridge built by Isambard Kingdom Brunel (1859), provides the other main land transport link. The city of Plymouth,
3430-493: The Allegheny Plateau of Kentucky and West Virginia , Eastern Ohio , and Western Pennsylvania . In the same way the anthracite region of South Wales is confined to the contorted portion west of Swansea and Llanelli , the central and eastern portions producing steam coal , coking coal and domestic house coals. Anthracite shows some alteration by the development of secondary divisional planes and fissures so that
3528-774: The Atlantic Bronze Age system, and which extended over most of the areas of present-day Ireland, England, Wales, France, Spain, and Portugal. During the British Iron Age , Cornwall, like all of Britain (modern England, Scotland, Wales, and the Isle of Man), was inhabited by a Celtic-speaking people known as the Britons with distinctive cultural relations to neighbouring Brittany . The Common Brittonic spoken at this time eventually developed into several distinct tongues, including Cornish , Welsh , Breton , Cumbric and Pictish . The first written account of Cornwall comes from
3626-503: The Battle of Hingston Down at Hengestesdune. In 875, the last recorded king of Cornwall, Dumgarth , is said to have drowned. Around the 880s, Anglo-Saxons from Wessex had established modest land holdings in the north eastern part of Cornwall; notably Alfred the Great who had acquired a few estates. William of Malmesbury , writing around 1120, says that King Athelstan of England (924–939) fixed
3724-720: The Bodmin Manumissions . One interpretation of the Domesday Book is that by this time the native Cornish landowning class had been almost completely dispossessed and replaced by English landowners, particularly Harold Godwinson himself. However, the Bodmin manumissions show that two leading Cornish figures nominally had Saxon names, but these were both glossed with native Cornish names. In 1068, Brian of Brittany may have been created Earl of Cornwall , and naming evidence cited by medievalist Edith Ditmas suggests that many other post-Conquest landowners in Cornwall were Breton allies of
3822-529: The Celtic Sea , part of the Atlantic Ocean, is more exposed and therefore has a wilder nature. The High Cliff , between Boscastle and St Gennys , is the highest sheer-drop cliff in Cornwall at 223 metres (732 ft). Beaches, which form an important part of the tourist industry, include Bude , Polzeath , Watergate Bay , Perranporth , Porthtowan , Fistral Beach , Newquay , St Agnes , St Ives , and on
3920-568: The Coal Region . Legend has it that Allen fell asleep at the base of Broad Mountain and woke to the sight of a large fire because his campfire had ignited an outcrop of anthracite coal. By 1795, an anthracite-fired iron furnace had been built on the Schuylkill River . Anthracite was first experimentally burned as a residential heating fuel in the US on 11 February 1808, by Judge Jesse Fell in Wilkes-Barre, Pennsylvania , on an open grate in
4018-552: The Cornish language , Cornwall is Kernow which stems from the same Proto-Celtic root. Humans reoccupied Britain after the last Ice Age . The area now known as Cornwall was first inhabited in the Palaeolithic and Mesolithic periods. It continued to be occupied by Neolithic and then by Bronze Age people. Cornwall in the Late Bronze Age formed part of a maritime trading-networked culture which researchers have dubbed
Western Middle Anthracite Field - Misplaced Pages Continue
4116-574: The Dumnonii often came into conflict with the expanding English kingdom of Wessex . Centwine of Wessex "drove the Britons as far as the sea" in 682, and by 690 St Bonifice , then a Saxon boy, was attending an abbey in Exeter, which was in turn ruled by a Saxon abbot. The Carmen Rhythmicum written by Aldhelm contains the earliest literary reference to Cornwall as distinct from Devon. Religious tensions between
4214-504: The Dumnonii , three of which may have been in Cornwall. However, after 410 AD, Cornwall appears to have reverted to rule by Romano-Celtic chieftains of the Cornovii tribe as part of the Brittonic kingdom of Dumnonia (which also included present-day Devonshire and the Scilly Isles), including the territory of one Marcus Cunomorus , with at least one significant power base at Tintagel in
4312-523: The Industrial Revolution , the tin and copper mines were expanded and then declined, with china clay extraction becoming a major industry. Railways were built, leading to a growth of tourism in the 20th century. The Cornish language became extinct as a living community language at the end of the 18th century , but is now being revived. The modern English name "Cornwall" is a compound of two terms coming from two different language groups: In
4410-451: The River Looe are both popular with tourists. The interior of the county consists of a roughly east–west spine of infertile and exposed upland, with a series of granite intrusions, such as Bodmin Moor , which contains the highest land within Cornwall. From east to west, and with approximately descending altitude, these are Bodmin Moor, Hensbarrow north of St Austell , Carnmenellis to
4508-545: The United States has the largest known deposits of anthracite coal in the world with an estimated reserve of seven billion short tons . China accounts for the majority of global production; other producers include Russia , Ukraine , North Korea , South Africa , Vietnam , Australia , Canada , and the United States . Total production in 2020 was 615 million tons. Anthracite is the most metamorphosed type of coal, but still represents low-grade metamorphism, in which
4606-504: The constitutional status of Cornwall and seeks greater autonomy within the United Kingdom. Cornwall is the westernmost part of the South West Peninsula , and the southernmost county within the United Kingdom. Its coastline is characterised by steep cliffs and, to the south, several rias , including those at the mouths of the rivers Fal and Fowey . It includes the southernmost point on Great Britain , Lizard Point , and forms
4704-567: The county town is the city of Truro . The county is rural, with an area of 1,375 square miles (3,562 km ) and population of 568,210. Outside of the Redruth-Camborne conurbation the largest settlements are Falmouth , Penzance , Newquay , St Austell , and Truro. For local government purposes most of Cornwall is a unitary authority area, with the Isles of Scilly having a unique local authority . The Cornish nationalist movement disputes
4802-617: The metallurgy sector. Anthracite accounts for about 1% of global coal reserves, and is mined in only a few countries around the world. Anthracite derives from the Greek anthrakítēs ( ἀνθρακίτης ), literally "coal-like". Other terms which refer to anthracite are black coal , hard coal , stone coal , dark coal , coffee coal , blind coal (in Scotland), Kilkenny coal (in Ireland), crow coal or craw coal , and black diamond . "Blue Coal"
4900-474: The sub-Roman Westcountry , South Wales, Brittany, the Channel Islands, and Ireland through the fifth and sixth centuries. In Cornwall, the arrival of Celtic saints such as Nectan , Paul Aurelian, Petroc , Piran , Samson and numerous others reinforced the preexisting Roman Christianity. The Battle of Deorham in 577 saw the separation of Dumnonia (and therefore Cornwall) from Wales, following which
4998-455: The "Cornish Riviera", is more sheltered and there are several broad estuaries offering safe anchorages, such as at Falmouth and Fowey . Beaches on the south coast usually consist of coarser sand and shingle, interspersed with rocky sections of wave-cut platform . Also on the south coast, the picturesque fishing village of Polperro , at the mouth of the Pol River, and the fishing port of Looe on
SECTION 50
#17328700959295096-424: The 1st-century BC Sicilian Greek historian Diodorus Siculus , supposedly quoting or paraphrasing the 4th-century BCE geographer Pytheas , who had sailed to Britain: The inhabitants of that part of Britain called Belerion (or Land's End) from their intercourse with foreign merchants, are civilized in their manner of life. They prepare the tin , working very carefully the earth in which it is produced ... Here then
5194-539: The AHS Heat Zone 1. Extreme temperatures in Cornwall are particularly rare; however, extreme weather in the form of storms and floods is common. Due to climate change Cornwall faces more heatwaves and severe droughts, faster coastal erosion, stronger storms and higher wind speeds as well as the possibility of more high-impact flooding. Cornish, a member of the Brythonic branch of the Celtic language family , died out as
5292-764: The Dartmoor area). The stannary courts administered equity for the region's tin-miners and tin mining interests, and they were also courts of record for the towns dependent on the mines. The separate and powerful government institutions available to the tin miners reflected the enormous importance of the tin industry to the English economy during the Middle Ages. Special laws for tin miners pre-date written legal codes in Britain, and ancient traditions exempted everyone connected with tin mining in Cornwall and Devon from any jurisdiction other than
5390-770: The Dumnonians (who celebrated celtic Christian traditions) and Wessex (who were Roman Catholic ) are described in Aldhelm's letter to King Geraint . The Annales Cambriae report that in AD 722 the Britons of Cornwall won a battle at "Hehil" . It seems likely that the enemy the Cornish fought was a West Saxon force, as evidenced by the naming of King Ine of Wessex and his kinsman Nonna in reference to an earlier Battle of Llongborth in 710. The Anglo-Saxon Chronicle stated in 815 (adjusted date) "and in this year king Ecgbryht raided in Cornwall from east to west." this has been interpreted to mean
5488-449: The Lizard peninsula is unusual, in that it is mainland Britain's only example of an ophiolite , a section of oceanic crust now found on land. Much of the peninsula consists of the dark green and red Precambrian serpentinite , which forms spectacular cliffs, notably at Kynance Cove , and carved and polished serpentine ornaments are sold in local gift shops. This ultramafic rock also forms
5586-679: The Normans, the Bretons being descended from Britons who had fled to what is today Brittany during the early years of the Anglo-Saxon conquest. She also proposed this period for the early composition of the Tristan and Iseult cycle by poets such as Béroul from a pre-existing shared Brittonic oral tradition. Soon after the Norman conquest most of the land was transferred to the new Breton–Norman aristocracy, with
5684-452: The Phoenicians sailed to Cornwall. In fact, he says quite the opposite: the production of Cornish tin was in the hands of the natives of Cornwall, and its transport to the Mediterranean was organized by local merchants, by sea and then overland through France, passing through areas well outside Phoenician control." Isotopic evidence suggests that tin ingots found off the coast of Haifa , Israel , may have been from Cornwall. Tin, required for
5782-440: The Roman road system extended into Cornwall with four significant Roman sites based on forts: Tregear near Nanstallon was discovered in the early 1970s, two others were found at Restormel Castle , Lostwithiel in 2007, and a third fort near Calstock was also discovered early in 2007. In addition, a Roman-style villa was found at Magor Farm , Illogan in 1935. Ptolemy 's Geographike Hyphegesis mentions four towns controlled by
5880-424: The South West increasingly came into conflict with the expanding Anglo-Saxon kingdom of Wessex , eventually being pushed west of the Tamar; by the Norman Conquest Cornwall was administered as part of England, though it retained its own culture. The remainder of the Middle Ages and Early Modern Period were relatively settled, with Cornwall developing its tin mining industry and becoming a duchy in 1337. During
5978-419: The St Austell area on 1 April 2009 St Austell was the largest settlement in Cornwall. Cornwall borders the county of Devon at the River Tamar. Major roads between Cornwall and the rest of Great Britain are the A38 which crosses the Tamar at Plymouth via the Tamar Bridge and the town of Saltash , the A39 road (Atlantic Highway) from Barnstaple , passing through North Cornwall to end in Falmouth, and
SECTION 60
#17328700959296076-465: The United States averages 29 MJ/kg (25 million Btu/ton), on the as-received basis, containing both inherent moisture and mineral matter. Since the 1980s, anthracite refuse or mine waste has been used for coal power generation in a form of recycling . The practice known as reclamation is being applied to culm piles antedating laws requiring mine owners to restore lands to their approximate original condition. Chemically, anthracite may be considered as
6174-496: The boundary between English and Cornish people at the east bank of the River Tamar . While elements of William's story, like the burning of Exeter , have been cast in doubt by recent writers Athelstan did re-establish a separate Cornish Bishop and relations between Wessex and the Cornish elite improved from the time of his rule. Eventually King Edgar was able to issue charters the width of Cornwall, and frequently sent emissaries or visited personally as seen by his appearances in
6272-466: The carbon content is between 86% and 97%. The term is applied to those varieties of coal which do not give off tarry or other hydrocarbon vapours when heated below their point of ignition . Anthracite is difficult to ignite, and burns with a short, blue, and smokeless flame. Anthracite is categorized into several grades. Standard grade is used predominantly in power generation, and high grade (HG) and ultra high grade (UHG), are used predominantly in
6370-442: The coast and are also rare in the central upland areas. Summers are, however, not as warm as in other parts of southern England. The surrounding sea and its southwesterly position mean that Cornwall's weather can be relatively changeable. Cornwall is one of the sunniest areas in the UK. It has more than 1,541 hours of sunshine per year, with the highest average of 7.6 hours of sunshine per day in July. The moist, mild air coming from
6468-424: The county town Truro. Together with the neighbouring town of Redruth , it forms the largest urban area in Cornwall, and both towns were significant as centres of the global tin mining industry in the 19th century; nearby copper mines were also very productive during that period. St Austell is also larger than Truro and was the centre of the china clay industry in Cornwall. Until four new parishes were created for
6566-400: The development of the hot blast in 1828, which used waste heat to preheat combustion air, anthracite became a preferred fuel, accounting for 45% of US pig iron production within 15 years. Anthracite iron smelting was later displaced by coke . From the late 19th century until the 1950s, anthracite was the most popular fuel for heating homes and other buildings in the northern US, until it
6664-481: The early 20th century US, the Delaware, Lackawanna and Western Railroad started using only the more expensive anthracite coal in its passenger locomotives, dubbed themselves "The Road of Anthracite", and advertised widely that travelers on their line could make railway journeys without getting their clothing stained with soot. The advertisements featured a white-clad woman named Phoebe Snow and poems containing lines like "My gown stays white / From morn till night / Upon
6762-586: The early 6th century. King Mark of Cornwall is a semi-historical figure known from Welsh literature, from the Matter of Britain , and, in particular, from the later Norman-Breton medieval romance of Tristan and Yseult , where he appears as a close relative of King Arthur , himself usually considered to be born of the Cornish people in folklore traditions derived from Geoffrey of Monmouth 's 12th-century Historia Regum Britanniae . Archaeology supports ecclesiastical, literary and legendary evidence for some relative economic stability and close cultural ties between
6860-446: The fine particles used as filter media, and as an ingredient in charcoal briquettes . Anthracite was an authorised fuel in terms of the United Kingdom's Clean Air Act 1993 , meaning that it could be used within a designated Smoke Control Area such as the central London boroughs. China today mines by far the largest share of global anthracite production, accounting for more than three-quarters of global output. Most Chinese production
6958-491: The highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles). High grade and ultra high grade anthracite are harder than standard grade anthracite, and have a higher relative density. An example of a chemical formula for high-grade anthracite would be C 240 H 90 O 4 NS, representing 94% carbon. UHG anthracite typically has
7056-667: The history of the Western Middle Anthracite Field aligns with much of the other significant events in the Coal Region in Pennsylvania. Yet, the region is specifically famous for housing the town of Shenandoah, Pennsylvania , the famous hotbed of unionization in the coaling industry and of the Molly Maguires in the 1870s. In the 1890s, the two Schuylkill fields, the Southern and the Western Middle Fields, were
7154-599: The island of Great Britain , and is therefore exposed to the full force of the prevailing winds that blow in from the Atlantic Ocean. The coastline is composed mainly of resistant rocks that give rise in many places to tall cliffs. Cornwall has a border with only one other county, Devon , which is formed almost entirely by the River Tamar , and the remainder (to the north) by the Marsland Valley . The north and south coasts have different characteristics. The north coast on
7252-649: The lands overlying the coal, it is estimated that 7 billion short tons (6.3 billion tonnes) of minable reserves remain. Other areas of the United States also contain several smaller deposits of anthracite, such as those historically mined in Crested Butte, Colorado . Among current producers, Russia, China, Poland, and Ukraine have the largest estimated recoverable reserves of anthracite. Other countries with substantial reserves include Vietnam and North Korea. The Groundhog Anthracite Deposit in British Columbia , Canada,
7350-401: The lion's share going to Robert, Count of Mortain , half-brother of King William and the largest landholder in England after the king with his stronghold at Trematon Castle near the mouth of the Tamar. Subsequently, however, Norman absentee landlords became replaced by a new Cornish-Norman ruling class including scholars such as Richard Rufus of Cornwall . These families eventually became
7448-505: The merchants buy the tin from the natives and carry it over to Gaul , and after traveling overland for about thirty days, they finally bring their loads on horses to the mouth of the Rhône. The identity of these merchants is unknown. It has been theorized that they were Phoenicians , but there is no evidence for this. Professor Timothy Champion, discussing Diodorus Siculus's comments on the tin trade, states that "Diodorus never actually says that
7546-592: The most economical method of obtaining power, requiring only 1 pound per horsepower-hour (0.6 kg / kWh ), or less. Large quantities of anthracite for power purposes were formerly exported from South Wales to France, Switzerland and parts of Germany. As of April 2013 , widespread commercial anthracite mining in Wales has now ceased, although a few large open cast sites remain, along with some relatively small drift mining operations. Anthracite generally costs two to six times as much as regular coal. In June 2008,
7644-576: The most important mining areas in Europe until the early 20th century. It is thought tin was mined here as early as the Bronze Age , and copper, lead, zinc and silver have all been mined in Cornwall . Alteration of the granite also gave rise to extensive deposits of China Clay , especially in the area to the north of St Austell, and the extraction of this remains an important industry. The uplands are surrounded by more fertile, mainly pastoral farmland. Near
7742-722: The new rulers of Cornwall, typically speaking Norman French , Breton-Cornish, Latin , and eventually English, with many becoming involved in the operation of the Stannary Parliament system, the Earldom and eventually the Duchy of Cornwall . The Cornish language continued to be spoken and acquired a number of characteristics establishing its identity as a separate language from Breton . The stannary parliaments and stannary courts were legislative and legal institutions in Cornwall and in Devon (in
7840-465: The original stratification lines are not always easily seen. The thermal conductivity is also higher; a lump of anthracite feels perceptibly colder when held in the warm hand than a similar lump of bituminous coal at the same temperature. Anthracite has a history of use in blast furnaces for iron smelting; however, it lacked the pore space of metallurgical coke , which eventually replaced anthracite. In southwest Wales , anthracite has been burned as
7938-506: The production of bronze , was a relatively rare and precious commodity in the Bronze Age – hence the interest shown in Devon and Cornwall's tin resources. (For further discussion of tin mining see the section on the economy below .) In the first four centuries AD, during the time of Roman dominance in Britain , Cornwall was rather remote from the main centres of Romanization – the nearest being Isca Dumnoniorum , modern-day Exeter . However,
8036-534: The publication in 1904 of Henry Jenner 's Handbook of the Cornish Language . It is a social networking community language rather than a social community group language. Cornwall Council encourages and facilitates language classes within the county, in schools and within the wider community. In 2002, Cornish was named as a UK regional language in the European Charter for Regional or Minority Languages . As
8134-505: The road of Anthracite". Similarly, the Great Western Railway in the UK was able to use its access to anthracite (it dominated the anthracite region) to earn a reputation for efficiency and cleanliness unmatched by other UK companies. Internal combustion motors driven by the so-called "mixed", "poor", "semi-water" or " Dowson gas " produced by the gasification of anthracite with air (and a small proportion of steam) were at one time
8232-758: The sculptor Barbara Hepworth , at the outbreak of the Second World War . They were later joined by the Russian emigrant Naum Gabo , and other artists. These included Peter Lanyon , Terry Frost , Patrick Heron , Bryan Wynter and Roger Hilton . St Ives also houses the Leach Pottery, where Bernard Leach , and his followers championed Japanese inspired studio pottery. Much of this modernist work can be seen in Tate St Ives . The Newlyn Society and Penwith Society of Arts continue to be active, and contemporary visual art
8330-476: The smaller Rice and Buckwheat are used in automatic stoker furnaces. Rice is currently the most sought-after size due to the ease of use and popularity of that type of furnace. In South Wales , a less elaborate classification is adopted, but great care is exercised in hand-picking and cleaning the coal from particles of pyrites in the higher qualities known as best malting coals, which are used for kiln-drying malt. Anthracite dust can be made into briquettes and
8428-573: The south coast Gyllyngvase beach in Falmouth and the large beach at Praa Sands further to the south-west. There are two river estuaries on the north coast: Hayle Estuary and the estuary of the River Camel , which provides Padstow and Rock with a safe harbour. The seaside town of Newlyn is a popular holiday destination, as it is one of the last remaining traditional Cornish fishing ports, with views reaching over Mount's Bay. The south coast, dubbed
8526-486: The south coast, deep wooded valleys provide sheltered conditions for flora that like shade and a moist, mild climate. These areas lie mainly on Devonian sandstone and slate . The north east of Cornwall lies on Carboniferous rocks known as the Culm Measures . In places these have been subjected to severe folding, as can be seen on the north coast near Crackington Haven and in several other locations. The geology of
8624-563: The south of Camborne , and the Penwith or Land's End peninsula. These intrusions are the central part of the granite outcrops that form the exposed parts of the Cornubian batholith of south-west Britain, which also includes Dartmoor to the east in Devon and the Isles of Scilly to the west, the latter now being partially submerged. The intrusion of the granite into the surrounding sedimentary rocks gave rise to extensive metamorphism and mineralisation , and this led to Cornwall being one of
8722-536: The southwest brings higher amounts of rainfall than in eastern Great Britain, at 1,051 to 1,290 mm (41.4 to 50.8 in) per year. However, this is not as much as in more northern areas of the west coast. The Isles of Scilly, for example, where there are on average fewer than two days of air frost per year, is the only area in the UK to be in the Hardiness zone 10. The islands have, on average, less than one day of air temperature exceeding 30 °C per year and are in
8820-597: The stannary courts in all but the most exceptional circumstances. Cornish piracy was active during the Elizabethan era on the west coast of Britain. Cornwall is well known for its wreckers who preyed on ships passing Cornwall's rocky coastline. During the 17th and 18th centuries Cornwall was a major smuggling area. In later times, Cornwall was known to the Anglo-Saxons as "West Wales" to distinguish it from "North Wales" (the modern nation of Wales ). The name appears in
8918-403: The state of Pennsylvania. Mining of anthracite coal continues to this day in eastern Pennsylvania, and contributes up to 1% to the gross state product. More than 2,000 people were employed in the mining of anthracite coal in 1995. Most of the mining as of that date involved reclaiming coal from slag heaps (waste piles from past coal mining) at nearby closed mines. Some underground anthracite coal
9016-495: The summer season, a service is also provided between St Mary's and Exeter Airport , in Devon. Cornwall has varied habitats including terrestrial and marine ecosystems. One noted species in decline locally is the Reindeer lichen , which species has been made a priority for protection under the national UK Biodiversity Action Plan . Botanists divide Cornwall and Scilly into two vice-counties: West (1) and East (2). The standard flora
9114-474: The sunniest climates of the United Kingdom, as a result of its oceanic setting and the influence of the Gulf Stream . The average annual temperature in Cornwall ranges from 11.6 °C (52.9 °F) on the Isles of Scilly to 9.8 °C (49.6 °F) in the central uplands. Winters are among the warmest in the country due to the moderating effects of the warm ocean currents, and frost and snow are very rare at
9212-445: The wholesale cost of anthracite was US$ 150/ short ton , falling to $ 107/ton in 2021; it makes up 1% of U.S. coal production. The principal use of anthracite today is for a domestic fuel in either hand-fired stoves or automatic stoker furnaces. It delivers high energy per its weight and burns cleanly with little soot, making it ideal for this purpose. Its high value makes it prohibitively expensive for power plant use. Other uses include
9310-459: The winter where fallen snow is seen to be melted by the warmth conducted from below. Proposals for harnessing this heat as geothermal energy have not been successful. A vein of anthracite that caught fire in Centralia, Pennsylvania , in 1962 has been burning ever since, turning the once-thriving borough into a ghost town . Geologically, the largest most concentrated anthracite deposit in the world
9408-486: Was initially centred on the art-colony of Newlyn , most active at the turn of the 20th century. This Newlyn School is associated with the names of Stanhope Forbes , Elizabeth Forbes , Norman Garstin and Lamorna Birch . Modernist writers such as D. H. Lawrence and Virginia Woolf lived in Cornwall between the wars, and Ben Nicholson , the painter, having visited in the 1920s came to live in St Ives with his then wife,
9506-602: Was supplanted by oil-burning systems, and more recently natural gas systems. Many large public buildings, such as schools, were heated with anthracite-burning furnaces through the 1980s. During the American Civil War , Confederate blockade runners used anthracite as a smokeless fuel for their boilers to avoid revealing their position to the blockaders. The invention of the Wootten firebox enabled locomotives to directly burn anthracite efficiently, particularly waste culm. In
9604-485: Was used as a pigment . The term is also used to refer to some carboniferous rock strata found in both Britain and in the Rhenish hill countries, also known as the Culm Measures . In Britain, it may also refer to coal exported from Britain during the 19th century. In American English, "culm" refers to the waste or slack from anthracite mining, mostly dust and small pieces not suitable for use in home furnaces. Anthracite
#928071