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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第19卷    第3期    总第120期    2009年3月

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文章编号:1004-0609(2009)03-0570-06
采用熔融碱法从红土镍矿中提取硅
牟文宁,翟玉春,刘  岩

(东北大学 材料与冶金学院,沈阳 110004)

摘 要: 通过正交试验,研究红土镍矿熔融碱法提硅过程中反应温度、反应时间、碱矿质量比及搅拌速度对SiO2提取率的影响。结果表明:试验过程中各因素对SiO2提取率的影响由大到小的顺序为反应温度>反应时间>碱矿质量比>搅拌速度;最佳的试验条件为反应温度550 ℃,反应时间20 min,碱矿质量比4׃1,搅拌速度400 r/min;按照最佳条件进行实验,SiO2的提取率可达93%以上,镍、铁和镁等元素富集于渣中,氧化镍的质量含量达到2.92%。

 

关键词: 红土镍矿;熔融碱;二氧化硅

Extraction of silicon from laterite-nickel ore by molten alkali
MU Wen-ning, ZHAI Yu-chun, LIU Yan

School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

Abstract: The effects of reaction temperature, reaction time, mass ratio of alkali to ore, and agitation speed on the extracting ratio of SiO2 during the process of extracting silicon from laterite-nickel ore by molten alkali were investigated through orthogonal experiments. The results show that the sequence of each factor affecting the extracting ratio of SiO2 is reaction temperature>reaction time>mass ratio of alkali to ore>agitation speed. The optimum technological conditions are obtained as reaction temperature of 550 ℃, reaction time of 20 min, mass ratio of alkali to ore of 4׃1 and agitation speed of 400 r/min. The extracting ratio of SiO2 is over 93% under the optimum conditions, the elements of iron, magnesium and nickel are enriched in the residue, and the mass content of NiO is as high as 2.92%.

 

Key words: laterite-nickel ore; molten alkali; silicon dioxide

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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