The Pronto Mine is an historical uranium mine located approximately 20 km south of Elliot Lake , Ontario near Spragge . The site is owned and operated by Rio Algom Ltd , has been rehabilitated and is currently undergoing environmental monitoring .
8-515: The mine was in operation from 1956 to 1960, during which time it produced 4,643,835 pounds of U 3 O 8 . Upon closure of the mine, the mill was converted to a copper concentrator to process ore from the nearby Pater Mine and operated until 1970. The Pronto mine is located on lot 3, concession II, Long township. It is located 11 miles east of Blind River , it is near the Canadian Pacific Railway and highway 17 . The Pronto deposit
16-411: A 6Å × 6Å × 6Å box with the uranium atom in the centre, the bond valence calculation was performed for both U1 and U2 in solid. It was found, using the parameters for U(VI), that the calculated oxidation states for U1 and U2 are 5.11 and 5.10. Using the parameters for U(IV), the calculated oxidation states are 5.78 and 5.77 for U1 and U2, respectively. These studies suggests that all the uranium atoms have
24-530: Is generally considered to be the more attractive form for disposal purposes because, under normal environmental conditions, U 3 O 8 is one of the most kinetically and thermodynamically stable forms of uranium. Its particle density is 8.3 g cm . Triuranium octoxide is converted to uranium hexafluoride for the purpose of uranium enrichment . The solid is a layered structure where the layers are bridged by oxygen atoms, each layer contains uranium atoms which are in different coordination environments. Using
32-596: Is one of the more popular forms of yellowcake and is shipped between mills and refineries in this form. U 3 O 8 has potential long-term stability in a geologic environment . In the presence of oxygen (O 2 ), uranium dioxide (UO 2 ) is oxidized to U 3 O 8 , whereas uranium trioxide (UO 3 ) loses oxygen at temperatures above 500 °C and is reduced to U 3 O 8 . The compound can be produced by any one of three primary chemical conversion processes, involving either uranium tetrafluoride (UF 4 ) or uranyl fluoride (UO 2 F 2 ) as intermediates. It
40-418: The mill continued operating. This article about a specific mine is a stub . You can help Misplaced Pages by expanding it . This Ontario location article is a stub . You can help Misplaced Pages by expanding it . Triuranium octoxide Soluble in nitric and sulfuric acids. Triuranium octoxide (U 3 O 8 ) is a compound of uranium . It is present as an olive green to black, odorless solid. It
48-494: The success of Messrs. Joubin and Hirshhorn caused "the greatest staking rush in the history of Ontario" In 1954, after establishing the size of the find, a contract for the sale of the uranium to the value of $ 55 million was signed and Pronto Uranium Mines Limited was formed as a subsidiary company to operate the mine. A shaft 650 feet deep shaft with four levels at 100 feet apart was sunk. Production started in September 1955. There
56-529: Was an ore treatment plant that could process 1,250 tons per day. Rio Tino bought Hirshhorn's share of the mine in 1956. 1958 the shaft was dug deeper to a seventh level and the treatment plant was upgraded to be able to process 1,500 tons per day. In 1958, Pronto Uranium Mines Limited declared dividends of $ 0.75 per a share. 1960 four companies, including Pronto Uranium Mines Limited, merged to form Rio Algom Mines Limited. Pronto Mine closed in April 1960, although
64-541: Was discovered in 1953, by geologist Franc R. Joubin, becoming the first uranium deposit discovered in the Algoma region. The prospecting was grubstaked by a J. H. Hirshhorn, a hotel owner. They formed Peach Uranium Syndicate, which later became Peach Uranium and Metals Limited and started diamond drilling. Messrs. Joubin and Hirshhorn, aided by staff from Preston East Dome gold mine, staked 1,400 claims and discovered more locations with uranium ore. The summer 1953 publication of
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