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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Musselwhite mine ： ウィキペディア英語版 Musselwhite mine The Musselwhite mine is one of the largest gold mines in Canada and in the world. The mine is located in the centre of the country in Ontario.〔 The mine has estimated reserves of of gold.〔 == Operation == Musselwhite mine uses a gold cyanidation and CIP (carbon in pulp) extraction process. Ore is extracted via a blast hole process and moved via a series of scoop-trams and underground dump trucks to one of 2 rockbreakers, either on the surface or at a 400 meter level. The ore then travels once through a jaw crusher and through a series of conveyor belts and countinously along a cone crusher rock sizing circuit. When the ore reaches a specific size it is transported to the mill building where the ore passes once through a rod mill and multiple times through a ball mill until the slurry is ground to approximately 10 µm. The slurry is then thickened, exposed to a cyanide treatment to extract it from the ore and into the solution, absorbed from the solution with activated carbon, rinsed off the carbon, passed through an electrowinning process and finally melted in a furnace and poured into 25 kg bars. The leftover tailings are passed though an INCO/S2O cyanide destruction process. The remaining tailings are sent though a final thickening stage and are pumped into the tailings pond composed of approximately 85% solids and very little cyanide. Twice a year the excess water is drained off the tailings pond where it flows naturally through a series of polishing ponds and a freshwater marsh. By the time the runoff reaches the natural watershed system the cyanide content is drastically reduced and poses no environmental or safety hazard. The total recovery of this process is approximately 96%. Electrical power is proved by a 115 kV running from Ear Falls to Pickle Lake and a private line from there to the site. However due to the reasonably low voltage of a line that length the losses are quite high, the site only has access to about 19 kV, stalling further development plans such as a mine shaft. Additional power as required or in the event of an outage is provided by a series of large diesel generators on site. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Musselwhite mine」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.