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首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >Dissolution Behavior of Calcium Vanadates and Magnesium Vanadates in Sulfuric Acid
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Dissolution Behavior of Calcium Vanadates and Magnesium Vanadates in Sulfuric Acid

机译：钙钒酸钙和镁钒酸盐的溶出行为

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摘要

The dissolution efficiency of vanadium is the key to improve the recovery of vanadium from vanadium-bearing converter slag by calcification roasting-acid leaching process. An improved process, which involves roasting with calcium-magnesium salts, followed by acid leaching, was found to have a positive effect on the vanadium recovery. In this process, CaO-MgO-V_2O_5 is the basic system in the roasting step. In this study, the dissolution behavior of calcium vanadates (CaV_2O_6, Ca_2V_2O_7, and Ca_3V_2O_8) and magnesium vanadates (MgV_2O_6, Mg_2V_2O_7, and Mg_3V_2O_8) in sulfuric acid was investigated. The effect of parameters, such as stirring speed, solid/liquid ratio, and pH value, on the dissolution behavior of vanadates were determined. The results shown that both of solid/liquid ratio and pH value have significantly effects on the dissolution efficiency of vanadium, while stirring speed has a relatively minor effect under the studied conditions. Furthermore, the dissolution efficiency of magnesium vanadates has been found much higher than that of calcium vanadates.
机译：钒的溶出效率是通过钙化焙烧酸浸出过程改善含钒换算渣的钒酸渣恢复的关键。发现一种改进的方法，涉及用钙 - 镁盐烘烤，然后是酸浸出，对钒回收产生阳性作用。在此过程中，Cao-MgO-V_2O_5是焙烧步骤中的基本系统。在该研究中，研究了硫酸钙钒酸钙（CAV_2O_6，CA_2V_2O_7和CA_3V_2O_8）和钒酸镁（MGV_2O_6，MG_2V_2O_7和MG_3V_2O_8）的溶出行为。测定参数的效果，例如搅拌速度，固体/液体比和pH值钒酸盐溶解行为。结果表明，固体/液体比和pH值两者对钒的溶解效率显着影响，而搅拌速度在研究条件下具有相对较小的效果。此外，已经发现镁钒酸盐的溶解效率远高于钒酸钙。

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