鲕状赤铁矿悬浮焙烧试验研究

Study on Suspension Roasting for Oolitic Hematite

研究对象为典型的"宁乡式"鲕状赤铁矿,属微细粒嵌布高磷鲕状赤铁矿,TFe品位44.56%。利用自制的实验室间歇式悬浮焙烧炉,考察了给矿细度、气流速度、H2浓度、焙烧温度、焙烧时间等对悬浮焙烧的影响,在适宜的条件下,获得了TFe品位56.73%,回收率83.96%的较优指标。相比于马弗炉焙烧,悬浮焙烧可以缩短焙烧时间,提高焙烧产品质量,降低焙烧能耗,具有较强的推广意义。

The fine-disseminated high phosphorus oolitic hematite with a TFe grade of 44.56% was researched by the homemade laboratory batch-type suspension roaster. The feeding fineness, gas velocity, hydrogen concentration, roasting temperature, roasting time were investigated and at an appropriate condition, the optimal index with a TFe grade of 56.73% and a recovery of 83.96% was achieved. Compared with a muffle furnace ,the suspension roaster can shorten roasting time,improve product quality and reduce roasting energy consumption with a high popularizing significance.