摘要
试验用红土镍矿属于褐铁矿型红土镍矿,其主要矿相为针铁矿.在煤粉做还原剂,硫酸钠做添加剂条件下,红土镍矿在一定温度下焙烧一定时间后得到的焙烧产物中Ni主要以Fe-Ni合金形式存在,通过磁选可以使其得到有效的富集.本文探究了各工艺参数对磁选后镍铁精矿中镍品位及镍回收率的影响.结果表明,当红土镍矿、硫酸钠和煤粉的质量比为100∶22∶9,焙烧温度为1 200℃,焙烧时间为80 min,磁选磁场强度为150 m T条件下,可以得到镍品位为11.36%,镍回收率为83.35%的镍铁精矿,该精矿可直接作为冶炼不锈钢的原料.
The nickel laterite used in this study is limonitic ore, and its main phase is gOcthite. With the addition of sodium sulfate and coal as reductant, nickel laterite was caleinated at a given temperature for a certain length of time. In the roasted products, Ni mainly exists in the form of Fe - Ni in the reduced ore, which can be effectively enriched by wet magnetic separation. This paper investigates the key factors that in- fluence nickel grades and nickel recovery of the ferronickel concentrate. The result shows that when the mass ratio of laterite, sodium sulfate and coal is 100： 22：9, the laterite is roasted under 1 200 ℃ for 80 min, a ferronickel concentrate can be obtained with 11.36% nickel grade and 83.35% recovery, which can be used to produce stainless steel.
作者
高建勇
丁跃华
郝建璋
曾冠武
耿朝阳
孙正汉
GAO Jianyong DING Yuehua HAO Jianzhang ZENG Guanwu GENG Zhaoyang SUN Zhenghan(Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China The National Key Laboratory of Comprehensive Utilization of Vanadium and Titanium Resources, Pangang Group Research Institute Co. Ltd, Panzhihua, Sichuan 617000, China)
出处
《昆明理工大学学报（自然科学版）》
CAS
2017年第5期33-38,共6页
Journal of Kunming University of Science and Technology(Natural Science)
基金
鞍钢集团公司重点项目(2015AGB1009)
关键词
红土镍矿
还原焙烧
磁选
硫酸钠
镍铁精矿
nickel laterite, reduction roasting, magnetic separation, sodium sulfate, ferronickel concentrate
