To extract zinc from high si and Fe zinc oxide ore, a new process consisting of low acid leaching, iron removal and desilication was developed for zinc extraction.

为了从高含硅、含铁等的氧化锌矿中提取锌，设计了低酸浸出、针铁矿除铁并脱硅提锌的新工艺。

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The paper select the dust removal system on high ore bunker in The Lianyuan steel sintering plant as the study object, find the reason why the efficiency of the electrostatic precipitator is low.

本文选取涟源钢铁集团烧结厂高料仓除尘系统改造项目为研究对象，对原有电除尘器除尘效率低下的原因进行分析并加以全面改造；

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An iron ore shaft in Hebei was constructed by drilling. After removal of steel casing in the shaft, water leaked around the shaft wall.

河北省某铁矿竖井采用钻井法施工，拆除井筒钢护壁后出现井筒漏水。

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While we focused on waste removal, our ore release from the open pit suffered and we dipped into our lower-grade stockpile to feed the mill.

FORBES: Pan American 3Q Silver Output Lifted By Newly Acquired Dolores Mine; Adjusted Earnings Fall