Research on Vanadium Extraction from Vanadium-bearing Iron Concentrate by Roasting with Sodium Salt and Ion Exchange Process
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摘要: 以白马钒钛磁铁精矿为原料,在实验室进行了钠化焙烧和离子交换工艺研究。重点研究了钠化剂种类、配比、焙烧温度、冷却制度等对钒钛磁铁精矿焙烧转浸率的影响,并进行了8轮焙烧熟料浸出和离子交换水循环试验。研究结果表明,以3%~4%Na2CO3为添加剂,在焙烧温度1 150℃、焙烧时间30 min的条件下进行焙烧,钒转浸率可达85%~90%;在水循环过程中,溶液中的磷出现富集现象,当富集到一定程度时进行除磷处理,可实现水的循环利用。Abstract: Using the Baima vanadium-bearing titaniferous magnetite concentrate as raw material,research on sodium roasting and ion exchange process was carried out in the laboratory.The research focused on the effects of different kinds of sodium agents,proportioning,roasting temperature and cooling condition on the roasting leaching ratio of the vanadium-bearing titaniferous magnetite concentrate and 8 rounds of clinker roasting,leaching,ion exchange and water cycling trials were carried out.The results show that the vanadium leaching rate can reach 85%~90% with Na2CO3 content of 3%~4%,roasting temperature of 1 150 ℃,and roasting time of 30 min.Phosphorus exhibited an enrichment during water cycling process.With enrichment to a certain extent,phosphorus should be removed for water recirculation.
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