期刊
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
卷 43, 期 5, 页码 584-597出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/08827508.2021.1910509
关键词
Marine mineral resources; thermal reduction; sulfurization; slag optimization; pyrometallurgy; thermodynamic modeling
Polymetallic nodules and nickel laterite ores, both containing a variety of valuable metals with similar nickel concentrations, are ideal alternatives for industries seeking to meet the increasing demand for nickel resources. High-temperature carbothermic reduction and sulfurization have been investigated for efficient nickel extraction by optimizing slag and matte systems, achieving high nickel concentrations in the matte.
Polymetallic nodules and nickel laterite ores are composed of various valuable metals and have similar nickel concentration, which makes them ideal alternatives for industries seeking to meet the increasing demand for nickel resources. The extraction process of polymetallic nodules can utilize the well-established nickel laterite treatment process without the need for developing new processes and thus, save capital costs. Herein, to efficiently extract nickel from these resources, high-temperature carbothermic reduction and sulfurization were investigated by optimizing the slag and matte systems. FactSage, a thermodynamic software was used to predict the slag system's liquidus temperature and the formation of nickel matte. It was found that nickel matte formation was not dependent on CaSO4 addition whereas the nickel concentration in matte decreased with an increasing amount of the sulfiding agent FeS. Furthermore, the addition of a reductant significantly affected the concentration of nickel in the matte. A nickel concentration of >= 30 wt% and iron concentration of <= 40 wt% in matte were achieved by adding 0.5 wt% and 3 wt% carbon to nickel laterite ores and polymetallic nodules, respectively. Furthermore, replacing the sulfiding agent FeS with CaSO4 during the smelting of polymetallic nodules decreased the iron concentration in matte <= 15 wt% and increased the nickel concentration >= 50 wt%. Thus, this study confirmed the possibility of matte formation with high nickel concentration and low iron content by utilizing alternative nickel resources at 1350-1450 degrees C.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据