西南某白云质胶磷矿高炉法还原工艺研究

Study on reduction of dolomitic collophane in southwest China by blast furnace process

对西南地区某白云质胶磷矿在高炉法磷酸工艺中的还原过程进行了研究，考察了还原反应温度、还原反应时间、硅钙比等工艺条件对还原效果的影响。结果表明，适宜的操作条件范围为：还原温度1400-1450℃，还原时间45-60min。硅钙比2-3。

The reaction process of dolomitic collophane in southwest China by phosphoric acid process with blast furnace was studied to observe effect of the reduction temperature, reduc- tion reaction time, silica-calcium ratio and other process condi- tions on the reduction efficacy. The results showed that the ap- propriate operational conditions are the reduction temperature be- ing 1400-1450 ℃, the reduction time 45-60 rain. and the sili- ca-calcium ratio 2-3.