有色金属(冶炼部分)

采用FactSage热力学分析软件研究了添加含氟助浸剂对硫酸浸出某石煤空白焙烧熟样的影响。结果表明,添加含氟助浸剂不能强化硫酸直接与熟样中钒的反应;在加入含氟助浸剂的硫酸溶液中,白云母晶体结构中铝和硅能与氟生成络合物,使白云母的溶解反应更容易发生;赤铁矿在硫酸溶液中不易发生溶解反应,加入含氟助浸剂后,溶解反应相对容易发生,同时会生成固体产物FeF3·3H2O,使浸出液中Fe3+的浓度降低。

With aid of FactSage's thermodynamic analysis software,the effect of addition of fluorine-containing leaching agent on sulfuric acid leaching of blank roasted residue of stone coal was investigated.The results show that addition of fluorine-containing leaching agent can not strengthen direct reaction between sulfuric acid and vanadium in roasted residue.Muscovite is easily dissolved in sulfuric acid solution with addition of fluorine-containing leaching agent due to reaction of aluminum and silicon in muscovite crystal structure with fluorine to form the complex.Hematite is hardly to dissolve in pure sulfuric acid solution,however,with addition of fluorine-containing leaching agent,it is much easier to dissolve and generate solid product of FeF3·3H2O,thus reduce Fe3+concentration in lixivium.