Study on Sulfuric Acid Leaching of Vanadium-containing Clinker by Calcified Roasting
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摘要: 针对钒渣钙化焙烧硫酸浸出工业化生产中存在的钒浸出率低的问题,对熟料粒度、磁性物,以及浸出温度对钒浸出率的影响进行了研究。结果表明:+178μm熟料比例达到20%、熟料中磁性物含量达到2%、低温浸出是影响钒浸出率的主要原因;优化后参数为:熟料粒度-178μm比例 ≥ 98%、熟料中磁性物含量小于0.2%、浸出终了温度高于50℃,钒浸出率可达92.46%以上。Abstract: According to the lower leaching rate of vanadium-containing clinker by calcified roasting in industrial production,effects of the clinker particle size,magnetic materials content and temperature on the leaching rate of vanadium were investigated.The results show that the decrease in leaching rate is mainly caused by coarse clinker particles(ratio of +178 μm particles reaches to 20%),high content of magnetic materials(2%) and low leaching temperature.A leaching rate of vanadium more than 92.46% can be obtained by controlling the ratio of -178 μm clinker particles more than 98%,less than 0.2% of magnetic materials and the final leaching temperature more than 50℃.
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