絮凝剂在碳酸锶生产中除钡效果的研究

Research on barium removing effect of flocculants in strontium carbonate production

在碳酸锶生产中,碳化使用的黄水中钡离子含量直接决定碳酸锶的品质,添加除钡剂稀硫酸可使钡离子转化为硫酸钡而被除去。在黄水中添加稀硫酸也会有少量的硫酸锶生成,通过快速搅拌可使硫酸锶转化为硫酸钡。同时,快速搅拌也使得沉淀颗粒变得细小,使沉降速度减慢,通过加入絮凝剂可使悬浮物颗粒絮凝沉降。研究了不同的絮凝剂对悬浮物颗粒沉降效果的影响,结果表明,相对分子质量为1 800的聚丙烯酰胺沉降效果最好,且对碳酸锶产品无污染。

Ba2＋ content in yellow water directly determined the quality of strontium carbonate, adding sulfuric acid will cause the barium ions convert into barium sulfate and a small amount of strontium sulfate.Strontium sulfate will transform into barium sulfate by rapid stirring. Meanwhile, rapid stirring made the precipitation particles become smaller and resulted in slower settlement speed.If adding flocculant, suspended particles could be flocculated and precipitated.Influence of different floceulants on sedimentation effect of suspended particles was studied.Experiment results showed polyacrylamide with molecular weight of 1 800 had the best settlement effect and no pollution to the product.