含氟助浸剂对石煤酸浸提钒的影响

以湖北某地经空白焙烧的石煤为对象，研究了含氟助浸剂A对酸浸提钒过程的影响。结果表明，含氟助浸剂中的F-能促进白云母晶体结构中Si-O键及Al-O键的断裂、破坏云母结构、疏通含钒矿物的孔洞，为酸与石英、长石等含硅铝的矿物发生反应提供便利，表现在热力学上就是与白云母发生反应的ΔG降低；宏观上表现为钒浸出率显著提高，试验确定的最佳条件下的钒浸出率为85.37%，比硫酸直接浸钒高28.04个百分点。

Study on the Impact of F-contained Leaching Agent on Acid Leaching of Vanadium from Stone Coal

Regarding the stone coal roasted without any additive from Hubei province as the research target，the impact of F-contained leaching agent A on acid leaching of vanadium was studied. The results showed that F- in F- contained leaching agent A can break Si—O bond and Al—O bond in muscovite crystal structure，destroy the mica structure，and clear the pores of vanadium-contained minerals，thus providing a convenience for the reaction of acid with silicoaluminophosphate minerals such as quartz and feldspar etc..，The addition of F- contained leaching agent can lower the ΔG of the reaction of muscovite on thermodynamics; On the view of macroscopic，it can greatly improve the leaching rate of vanadium. Under the optimum conditions，the leaching rate of vanadium reached 85.37% and increased by 28.04%，compared with vanadium leaching directly with sulfuric acid.