Heap leaching to low grade gold ore in the Northwest District has been proven a profit making method.

采用堆浸法处理低品位金矿石，在西北各主要产金省已取得了很好的经济效益。

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Meanwhile, the 330 underground mine roadway shoulder the entire burden of the Northwest District in transportation, enhance the capacity.

同时，330巷道担负着该矿井下整个西北采区的运输重担，提升量大。

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Heap leaching to low grade gold ore in the Northwest District has been proven a profit making method. The paper introduces environment protection practices in several mines.

采用堆浸法处理低品位金矿石，在西北各主要产金省已取得了很好的经济效益。

youdao

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