红土高压酸浸过程中有价金属的物质流分析
Valuable metals substance flow analysis in high-pressure acid leaching process of laterites
田庆华 1董波 2郭学益 1王青骜 2许志鹏 1李栋1
作者信息
- 1. School of Metallurgy and Environment,Central South University,Changsha 410083,China;National&Regional Joint Engineering Research Center of Nonferrous Metal Resource Recycling,Changsha 410083,China
- 2. School of Metallurgy and Environment,Central South University,Changsha 410083,China
- 折叠
摘要
本研究将物质流分析方法(SFA)应用于某红土镍矿高压酸浸工艺.结果表明,虽然高压酸浸工艺已成为处理低品位红土镍矿的主流工艺,但大量固体废物的排放对环境造成极大危害,制约其规模化发展.该高压酸浸工艺年处理红土镍矿能力为321万t,每年将排放300万t高压浸出渣、10万t硫酸盐渣、1.6万t铁铝渣、0.08万t酸浸渣.用镍、钴、锰作为前驱体制备原料,最终流入前驱体制备工艺的物质分别为2.70万t/年、0.24万t/年、0.29万t/年,占比分别为77.14%、75.00%、13.12%.最终流入提钪工艺的超高附加值钪为40.00 t/年,占比为37.70%.高压酸浸工艺可选择性去除98.11%的铁和99.86%的铝.本研究结论对红土镍矿高压酸浸工艺的排放控制和资源循环利用提供了改进建议.
Abstract
Substance flow analysis(SFA),an analytical tool,was applied to a high-pressure acid leaching(HPAL)process of laterites.The results show that although the HPAL process has become the mainstream process for the treatment of laterites,a large amount of solid waste discharge has caused great harm to the environment and restricted its large-scale development.The annual treatment capacity of laterites by HPAL process is 321×104 t,and 300×104 t of high-pressure leaching residue,10×104 t of sulfate residue,1.6×104 t of iron and aluminum residue,and 0.08×104 t of acid leaching residue are discharged every year.Nickel,cobalt,and manganese are used as the raw materials for the preparation of a precursor,and the masses finally flowing into the precursor preparation process are 2.70×104 t/a,0.24×104 t/a,and 0.29×104 t/a,respectively,and the proportions are 77.14%,75.00%,and 13.12%,respectively.Scandium finally flows into the scandium extraction process is 40.00 t/a,and the proportion is 37.70%.A total of 98.11%of iron and 99.86%of aluminum can be selectively removed by the high-pressure acid leaching.Some recommendations for improving emission control and resource recycling for the high-pressure acid leaching process of laterites are put forward in the conclusions of this study.
关键词
物质流分析方法(SFA)/红土镍矿/高压酸浸工艺/排放控制/资源回收Key words
substance flow analysis(SFA)/laterite nickel ores/high-pressure acid leaching(HPAL)process/emission control/resource recycling引用本文复制引用
基金项目
National Key R&D Program of China(2019YFC1907402)
National Natural Science Foundation of China(51922108)
National Natural Science Foundation of China(52074363)
Hunan Natural Science Foundation,China(2019JJ20031)
Hunan Key Research and Development Program,China(2019SK2061)
出版年
2023
NETL
NSTL
维普
万方数据