高纯磷铁电硅热法制备影响因素实验研究

Experimental Research on Influencing Factors of High-purity Ferro-Phosphorus and Silicon Thermal Method

本研究以磷矿石和铁粉为原料,工业硅为还原剂,通过正交实验研究冶炼温度、保温时间、配硅系数对磷铁合金产品中C含量、Ti含量、P含量以及P组分收得率的影响。结果表明:实验所得磷铁合金中C含量均低于0.043%,Ti含量均低于0.036%。各因素对P含量以及P组分收得率的影响程度大小顺序为:配硅系数>冶炼温度>保温时间。电硅热法制备低C低Ti高纯磷铁合金的较佳工艺条件为冶炼温度1390℃,保温时间60 min,配硅系数1.2。此条件下磷铁合金成分为C含量0.010%,Ti含量0.036%,P含量27.78%,P组分收得率为96.49%。

In this study,phosphate rock and iron powder were used as raw materials,and industrial silicon is used as a reducing agent.Through orthogonal experiments,the effects of smelting temperature,holding time and silicon ratio on the carbon content,titanium content,phosphorus content and the recovery rate of phosphorus in ferro-phosphorus alloy products are studied.The results show that the carbon content in ferro-phosphorus alloys obtained in the experiment is less than 0.043%,and the titanium content is less than 0.036%.The order of the degree of influence of various factors on the phosphorus content and the recovery rate of phosphorus from large to small is:silicon ratio,smelting temperature,holding time.The best process conditions for preparing ferro-phosphorus alloy by electro-silicothermic process are smelting temperature of 1390℃,holding time of 60 min,and silicon ratio of 1.2.Under these conditions,the ferro-phosphorus alloy has a carbon content of 0.010%,a titanium content of 0.036%,and a phosphorus content of 27.78%.The recovery rate of phosphorus was 96.49%.