煤基铁精粉生产低硫珠铁试验研究  

Experimental Research on Production of Low-sulfur Iron Nuggets with Iron Concentrate Powder and Pulverized Coal

作　　者：马赛[1] 王静松[1] 丁银贵[1] 王广[1] 薛庆国[1] 

机构地区：[1]教育部生态与循环冶金重点实验室,北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁钒钛》2011年第4期31-35,共5页Iron Steel Vanadium Titanium

基　　金：国家发改委循环经济示范工程(发改办高技[2007]3194号);中央高校基本科研业务费专项资金资助(FRF-MP-09-001A)

摘　　要：对采用铁精粉、煤粉和石灰石为主要原料,配加CaF2所制成的含碳球团,在不同试验方案下进行还原试验研究,分析珠铁的生产过程和渣铁的组织成分,计算硫元素的分配情况。试验结果表明:采用合理的试验方案,能使含碳球团在27 min内还原熔分效果良好,并得到含硫量较低的珠铁;所得珠铁的内部组织结构主要由珠光体和渗碳体组成;渣中以Ca2Mg(Si2O7)和Ca3Mg(SiO4)2为主,其它成分很少;增加CaF2配入量,使得进入珠铁中的硫元素减少,进入渣中的硫元素增多;提高加热温度,使得进入珠铁中的硫元素减少,进入空气中的硫元素增多。According to different experimental plans,reduction experiments of carbon-bearing pellets mainly composed of iron concentrate,pulverized coal,limestone and CaF2 are carried out to analyze the production process of iron nuggets,chemical compositions and microstructure of slag and calculate the distribution of sulfur.The results show that： with reasonable experiment plans,we can get a good effect during the process of reduction,melting and separation of carbon-bearing pellet and finally iron nuggets with low sulfur in 27 min;the internal microstructure of iron nuggets principally consists of pearlite and cementite;major chemical compositions of the slag are Ca2Mg（Si2O7） and Ca3Mg（SiO4）2,with a very small amount of other compositions;increasing the amount of CaF2 added decreases sulfur in iron nuggets while increases it in slag;increasing heating temperature decreases sulfur in iron nuggets while increases it in the air.

关 键 词：珠铁 铁精粉 含碳球团 渣 硫 转底炉 

分 类 号：TF556[冶金工程—钢铁冶金]