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Key Lake mine
The Key Lake mine is a former uranium mine in Saskatchewan, Canada, and the site of the largest uranium mill in the world. It was initially developed to open-pit mine two nearby uranium ore deposits: the Gaertner deposit and the Deilmann deposit. Mining of this ore ceased in the late 1990s; the Key Lake mill now processes uranium ore from the McArthur River mine and from existing stockpiles on site. High-grade ore from McArthur river is blended with lower grade local rock before being passed through the mill. The mill has an annual production capacity of 18 million pounds of U3O8. In addition, ammonium sulfate fertilizer is produced as a byproduct from used reagents. The pits of the mined out local deposits are being used as mill tailings management facilities.
The Key Lake deposits jointly remain one of the higher grade uranium deposits ever discovered, at an average grade of over 2% U3O8. Key Lake is the third largest uranium deposit in the Athabasca Basin and is surpassed only by McArthur River and Cigar Lake.
Much of the exploration and development work was carried out by Uranerz Exploration and Mining, a company linked with German utility operators. The ore body was discovered by tracing radioactive boulders in the overburden back to their source.
Key Lake is located 570 kilometres north of Saskatoon, Saskatchewan by air on the southern rim of the uranium-rich Athabasca Basin. The nearest village by road is Pinehouse, 220 kilometres south of Key Lake.
== History ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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