Through the reduction roasting, the dezincification rate reached up to 98%, a high grade iron ore with only 0.

通过还原焙烧，高炉尘泥脱锌率可达98%，并得到含锌率仅为0。

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Pyrite roasting process was studied by using TG-DTA thermal analysis. The effects of sample size, heating rate and roasting atmosphere on the roasting process were discussed.

用TG - DTA热分析法研究黄铁矿在不同粒度和不同升温速率及不同气氛中的焙烧过程。

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The relation. between the con- verting rate of chromium and roasting temperature , the amount of soda , the amount of back slag - copper oxide are also studied.

研究了铬转化率与焙烧温度、配碱量、返渣氧化铜的量等条件的关系。

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