温度对铜渣和磷矿协同联产制备磷铁影响的实验研究

Effect of Temperature on the Co-production of Copper Slag and Middle Low-grade Phosphate Rock

磷铁是一种重要的工业合金物,在炼钢、化工业及新能源领域和建筑业具有举足轻重的作用,磷铁的开发利用不仅可以为企业带来经济效益,也可为国家经济的发展注入活力。本文在T=1200~1400℃,R(CaO/SiO_(2))=1.0,t=60 min,C=12%条件下进行实验。以磷矿和铜渣为原料,石墨作还原剂,在高温节能管式炉中还原焙烧制取磷铁,还原后的试样进行分离、磨矿,采用XRD、SEM和EDS对磷铁及渣进行表征,结果显示:T<1300℃所得磷铁主要物相为Fe_(3)P,T>1300℃所得磷铁主要物相为Fe_(3)P、Fe_(2)P。还原后测得渣的主要成分为硅酸盐类,以偏硅酸钙为主(CaSiO_(3))和含有少量的硅酸铝。

Ferro-phosphorus is an important industrial alloy,which plays a pivotal role in steelmaking,chemical industry,new energy and construction industry.The development and utilization of ferro-phosphorus can not only bring economic benefits to enterprises,but also contribute to the development of national economy.In this paper,the experiment was carried out under the conditions of T=1200℃-1400℃,R(CaO/SiO_(2))=1.0,t=60 min and C=12%.Phosphate rock and copper slag were used as raw materials,graphite was used as reducing agent,and ferrophosphorus was produced by reduction and roasting in a high-temperature energy-saving tubular furnace.The reduced samples were separated and ground,XRD,SEM and EDS were used to characterize ferrophosphorus and slag.The results showed that the main phase of ferrophosphorus obtained is Fe_(3)P at T<1300℃,and the main phase of ferrophosphorus obtained is Fe_(3)P and Fe_(2)P at T>1300℃.After reduction,it was measured that the main component of the slag was silicate,mainly calcium metasilicate(CaSiO_(3))and a small amount of aluminum silicate.