Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第27卷    第12期    总第225期    2017年12月

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文章编号:1004-0609(2017)-12-2598-07
钨酸盐体系中锑的硫化行为与分离
李永立,赵中伟

(中南大学 冶金与环境学院,长沙 410083)

摘 要: 针对选择性沉淀法从钨酸盐溶液中除钼过程,根据已有的热力学数据,计算了伴生杂质锑的硫化平衡行为,并探讨和验证了深度除锑的可行性和途径。绘制溶液中各含锑离子随pH、溶液电势以及硫与锑的浓度比[S]/[Sb]变化的分布曲线,分析了溶液中pH、硫化剂用量以及溶液电势对锑硫化行为的影响规律,分析了选择性沉淀法的除锑能力及其影响因素,提出了深度分离锑杂质的方法,并通过实验对上述思路进行了验证。结果表明:当pH为7~10、[S]/[Sb]≥2时,溶液中99%以上含锑离子以SbS2-的形式存在;实验结果与理论预测一致,并取得了较好的效果,当硫用量和铜加入量为锑摩尔量的3倍时,除锑率达到了97%。

 

关键词: 硫代锑酸盐;除锑;硫化反应;热力学;选择性沉淀法;钨酸盐溶液

Sulfidation and separation of antimony in tungsten solution
LI Yong-li, ZHAO Zhong-wei

School of Metallurgy and Environment, Central South University, Changsha 410083, China

Abstract:Aiming at the behavior of impurity Sb in the process of Mo separation by selective precipitation method, the distribution of diagram of various antimony-containing ions were drawn according to thermodynamic calculation results. And the sulfurization of Sb under conditions of different pH, φh and [Sb]/[S] was discussed and verified. The effectiveness of selective precipitation and operating factors on antimony removing were analyzed considering the competitive coordination of S2- ions, and a method was proposed for deep removing antimony impurities. The result show that, under the conditions of pH 7-10 and [S]/[Sb]≥2, more than 99% of antimony exists as SbS2-. The above idea is verified by experiment and the results are consistent with theoretical predictions. When the dosage of sulfur and copper are 3 times, the removal rate of antimony is 97%.

 

Key words: sulfantimoniate; antimony removal; sulfidation reaction; thermodynamics; selective precipitation; tungstatesdution

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

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

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