硫酸渣煤基自还原制备铁颗粒试验

Experiment on preparation of iron particle by coal based self-reduction of sulfur acid residues

硫酸渣是一种富含铁的二次资源。为了保护环境,实现硫酸渣的高效利用,提取其中的铁资源,解决铁矿原料不足的问题,降低生铁成本。以从某厂取回的硫酸渣为原料,无烟煤为还原剂,探讨了硫酸渣煤基自还原制备铁颗粒过程中,配碳量、还原时间及还原温度对还原压块中铁的金属化率的影响。最终确定了最优还原条件,即配碳量nC/nO为1.2、还原温度为1 250℃以及还原时间为12min。此时获得的试验结果最好,在此参数条件下铁的金属化率达96.99%。同时,对硫酸渣的应用前景提出了展望。

Sulfuric acid residues is a kind of significant secondary resource.In order to protect the environment,realize the high efficiency utilization of sulfuric acid residues,and extract the iron resources to solve the inadequate problems of iron ore raw materials and then reduce the cost of pig iron,the sulfuric acid residues taken from a certain plant was used as the raw material,and the anthracite was used as the reducing agent.The effects of carbon ratio, reduction time and reduction temperature on the metallization rate of iron in the reduction briquetting were discussed.Experiment results showed that the optimal reduction conditions were that the carbon ratio was 1.2,the reduction temperature was 1250℃,and the reduction time was 12min.Based on these conditions,the metallization rate of iron reached 96.99%.At the same time,the application prospect of sulfuric acid residues was put forward.