The features of talc ore in Henan Province are large reserves and low grade ore, but easy washability.

河南滑石矿的特点是大而贫，但可选性尚佳。

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This thesis will discuss the extractable grade of low grade ore according the production state of Jintingling Mining CO, ltd.

就金亭岭矿业有限公司生产现状，对低品位矿石的可回收品位进行了探讨。

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This process is a good example and also a feasible way for other similar mines with same problems of low grade ore and diluted resources to follow.

该流程对我国类似资源贫化型矿山低品位矿石的预选，具有较好的借鉴作用。

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They too want to reopen some of their closed mines to look for low-grade ore, and plan to expand production through joint ventures with international players.

BBC: Golden opportunity for old Indian mines

Low-grade uranium ore will be extracted at the Saghand mines and turned into purer uranium, known as yellowcake, at nearby Ardakan.

BBC: Iran unveils uranium activities at Saghand and Ardakan

Its mines were old, the ore grade low.

ECONOMIST: South African gold mining