首页|硫酸化焙烧—水浸法从镍精矿中同步提取金属及矿相转化

硫酸化焙烧—水浸法从镍精矿中同步提取金属及矿相转化

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提出低温NH4HSO4焙烧—水浸工艺从金川镍精矿中同步提取Ni、Cu和Co,并系统研究硫酸化焙烧和水浸出过程中一些因素对金属提取的影响.结果表明,在优化的焙烧和水浸条件下,95.7％Ni、98.9％Cu和96.8％Co被提取.利用TG-DTA、XRD、SEM和EDS等手段分析矿相的转化机理,在NH4HSO4及其分解的SO3和NH3的硫酸化反应下,有价金属被转化为水溶性金属—铵配合物从而得到有效的提取.通过提高浸出温度使铁离子与铵离子结合形成NH4[Fe3(SO4)2(OH)6]沉淀可除去浸出液中的杂质铁.在焙烧过程中收集的挥发物为(NH4)2SO4和(NH4)2SO3,可用作硫酸化焙烧的试剂.
Simultaneous extraction of metals from nickel concentrate via NH4HSO4 roasting-water leaching process and transformation of mineral phase
Low-temperature NH4HSO4 roasting-water leaching process was proposed to extract Ni,Cu and Co from Jinchuan nickel concentrate simultaneously.The effects of some factors on the metal extraction in the process of sulfation roasting and water leaching were systematically investigated.The results showed that 95.7％Ni,98.9％Cu and 96.8％Co were extracted under optimized roasting and water leaching conditions.The transformation evolution of mineral phases was determined through the means of DTA-TG,XRD,SEM and EDS.The valuable metals were effectively extracted by being transformed to water-soluble metal-ammonium complexes under the sulfation reaction of NH4HSO4 and decomposed SO3 and NH3.Iron impurities in the leach solution can be removed by elevating leaching temperature to combine iron ions with ammonium ions to form NH4[Fe3(SO4)2(OH)6]precipitate.The volatiles collected in the roasting process were determined to be(NH4)2SO4 and(NH4)2SO3,which can be used as reagents for sulfation roasting.

nickel concentrateNH4HSO4 roastingsimultaneous extractionwater leachingmineral phase transformation

杜守明、牟文宁、李丽莹、石树正、陈欢欢、雷雪飞、郭瑞、罗绍华、王乐

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东北大学材料科学与工程学院,沈阳 110819

东北大学秦皇岛分校资源与材料学院,秦皇岛 066004

东北大学秦皇岛分校资源与材料学院河北省电介质与电解质功能材料重点实验室,秦皇岛 066004

秦皇岛市资源清洁转化与高效利用重点实验室,秦皇岛 066004

华北理工大学冶金与能源学院,唐山 063210

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镍精矿 NH4HSO4焙烧 同步提取 水浸出 矿相转化

国家自然科学基金国家自然科学基金河北省自然科学基金河北省自然科学基金中央高校基本科研业务费专项中央高校基本科研业务费专项河北省教育厅科技项目Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,China

5207406952174314E2020501022E2022501030N2223027N2223009ZD202133122567627H

2024

10.1016/S1003-6326(23)66449-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(3)
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