以湖北某地区的石煤钙化焙烧熟料为原料,进行了焙烧熟料酸浸一浸出液净化除杂一净化液离子交换一交换余液补充硫酸酸浸一浸出液净化除杂的循环试验.考察了浸出液中SiO2、P、Cl-、SO2-4、Na+浓度和钒浸出率随余液循环次数增加的变化情况.研究结果表明,余液的循环使用对钒浸出率不产生明显影响;浸出液中的SiO2没有富集;P、SO2-4和Na+有一定的富集,其中P、SO2-4可以通过石灰中和的方式沉淀除去;Na+富集到一定程度后,在溶液中达到动态平衡,不影响溶液的循环.
Based on the clinker of calcifying roasting of stone coal in Hubei Province, the experimental processes involving the acid leaching of roasted clinker, leaching solution impurity removal, ion ex-change, supplement to residual solution by sulfuric acid leaching, leaching solution impurity removal a-gain, which had been recycled 12 times ,were researched. The concentration of SiO2, P, Cl-, SO2-4, Na+ in residual solution and the variation of leaching percentage of vanadium alone with the recycling times increasing were investigated. The research result indicated that the recycling use of residual solution would not affect the leaching percentage of vanadium significantly, no enrichment of SiO2 in the solution, certain concentration of P, SO2-4, and Na+. P and SO2-4could be precipitated and removed by lime-neu-tralization, and Na+ would get dynamic balance in the solution and would not affect its recycle.
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