Effect of nickel oxide additive on smelting mechanism of chromium-bearing vanadium titanomagnetite pellets  

氧化镍对含铬型钒钛磁铁矿球团冶炼机理的影响

作　　者：Gong-jin CHENG Wei-dong TANG Xiang-xin XUE 程功金;汤卫东;薛向欣(东北大学冶金学院,沈阳110819)

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang 110819,China

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第8期2501-2510,共10页中国有色金属学报（英文版）

基　　金：financial supports from the National Natural Science Foundation of China(Nos.21908020,U1908226)。

摘　　要：The effect of nickel oxide additive on the smelting behaviors of chromium-bearing vanadium titanomagnetite pellets(CVTP)was investigated while analyzing the transfer behavior of nickel in iron and slag.The results show that when NiO added to CVTP increases from 0 to 6 wt.%,softening start temperature increases from 1148 to 1212℃,and the softening end temperature increases from 1280 to 1334℃;the melting start temperature increases from 1318 to 1377℃,and the dripping temperature decreases from 1558 to 1521℃.The pig iron comprises a compound of Fe-Ni-C.The slag structure depolymerizes with increasing nickel addition.The softening-melting behaviors of CVTP,the reduction of nickel into pig iron,and the depolymerization of slag structure indicate the feasibility of producing nickel-iron alloy through the blast furnace process.研究氧化镍对含铬型钒钛磁铁矿球团冶炼行为的影响,分析镍在铁水和渣间的迁移行为。结果表明,当含铬型钒钛磁铁矿球团中NiO的添加量从0提高到6%(质量分数)时,软化开始温度从1148℃升高至1212℃,软化结束温度从1280℃升高至1334℃;熔化开始温度从1318℃升高到1377℃,滴落温度从1558℃降低到1521℃。生铁是Fe-Ni-C的化合物。炉渣结构的解聚程度随含铬型钒钛磁铁矿球团中镍添加量的增加而提高。含铬型钒钛磁铁矿球团的软熔滴落性能、镍的还原以及冶炼过程中炉渣结构的解聚程度表明通过高炉流程生产镍铁合金的可行性。

关 键 词：nickel-iron alloy chromium-bearing vanadium titanomagnetite pellets smelting mechanism slag structure 

分 类 号：TF046.6[冶金工程—冶金物理化学]