Mining, Minerals Processing and Metallurgical Engineering

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

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  • Gong-jin CHENG, Wei-dong TANG, Xiang-xin XUE
School of Metallurgy, Northeastern University, Shenyang 110819, China

Online published: 2021-08-25

Abstract

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 °C, and the softening end temperature increases from 1280 to 1334 °C; the melting start temperature increases from 1318 to 1377 °C, and the dripping temperature decreases from 1558 to 1521 °C. 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.

Cite this article

Gong-jin CHENG, Wei-dong TANG, Xiang-xin XUE . Effect of nickel oxide additive on smelting mechanism of chromium-bearing vanadium titanomagnetite pellets[J]. Transactions of Nonferrous Metals Society of China, 2021 , 31(8) : 2501 -2510 . DOI: 10.1016/S1003-6326(21)65670-4

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