低配碳含碳球团低温熔分过程中渣相和铁粒的行为.pdfVIP

低配碳含碳球团低温熔分过程中渣相和铁粒的行为 1，2 1 1 1 朱炳秀 姜 鑫 魏 国 沈峰满 （1. 东北大学 材料与冶金学院，沈阳 110004 ； 2. 金策工业综合大学金属系，平壤） 摘 要 根据低配碳低温直接还原—熔分工艺制备粒铁的技术思想，进行了低配碳低温条件下的熔分试验研究。试 验结果表明，C/O=0.8、1300℃条件下熔分2min 时，渣量为反应前球团质量的28.36%，球团中的渣基本形成与铁 粒独立的渣相。渣相中的FeO 可被碳质垫料继续还原成金属铁。本实验条件下，熔分30min 时，铁的收得率可达 约86.7%，铁粒中铁含量约为94.26%，金属化率可达95% 以上，可作为优质的电炉炼钢原料。 关键词 含碳球团 金属铁 渣相 渣铁分离1 The Behavior of Slag and Iron Nugget in Melting-separation Process Based on Ore-coal Composite at Low Carbon Ratio and Low Temperature Zhu Bingxiu1, 2 Jiang Xin1 Wei Guo1 Shen Fengman1 （1. School of Materials Metallurgy, Northeastern University, Shenyang , 110004; 2. Department of Metal, Kimchaek University of Technology, Pyongyang ） Abstract According to the technical idea of direct reduction followed by melting-separation based on ore-coal composite at low carbon ratio and low temperature, the melting-separation characteristic of metal and slag based on ore-coal composite is investigated. The experimental results show that, at the condition of 1300 ℃ and C/O=0.8, when the melting-separation time is 2 min, the quantity of slag is 28.36% of the initial green ball, basically all of the slag form independent slag phase. FeO in slag can be continually reduced to metallic iron by the graphite-based pad. Under the lab condition, when the melting-separation time is 30 min, the recovery of iron is about 86.7%, the metallic iron content in metal nugget is about 94.26%, and the metallization in nugget is up to 95%, which is a good feed for electrical furnace. Key words ore-coal composite, metallic iron, slag phase, separation of metal and slag 1 研究背景 随着电炉