论文部分内容阅读
考查了结合使用沉淀浮选和吸附胶体浮选同时排除水溶液中铜、铅和锌离子(每种离子浓度为25ppm)的可能性。氯化铁作共沉淀剂,油酸钾作捕收剂和改进沉淀。使用乙基黄酸钾使仍存在于溶液中的离子进一步共沉淀。试验pH为4.0～10。沉淀浮选和吸附胶体浮选使用不同的浮选槽。其不同在于气泡产生的方式,分别为扩散气休式和电解浮选。采用威尔赫尔迈法测定液/气界面在开始阶段和提纯后的表面张力,从而检测在带有沉淀金属离子的胶体颗粒上的吸附。采用ICP尤学发射分光计测定清液层中每一种重金属离子的浓度。与氯化铁共沉淀的重金属离子量根据共沉淀前后的浓度差来确定。已经找到从水溶液中几乎可以定量地脱除铜、铅和锌的最佳条件。
Examined the possibility of using both precipitation flotation and adsorption colloidal flotation while excluding copper, lead and zinc ions (25 ppm each ion concentration) in aqueous solution. Ferric chloride as coprecipitator, potassium oleate as collector and improve precipitation. The ions still present in the solution are further coprecipitated using potassium ethylphosphate. The test pH is 4.0-10. Precipitation flotation and adsorption colloidal flotation use different flotation cells. The difference lies in the way of bubble generation, respectively, gas diffusion and electrolytic flotation. The Wilhelm method was used to determine the surface tension of the liquid / vapor interface at the beginning and after purification to detect adsorption on colloidal particles with precipitated metal ions. The concentration of each of the heavy metal ions in the supernatant layer was measured using an ICP emissivity spectrometer. The amount of heavy metal ions coprecipitated with ferric chloride was determined according to the concentration difference before and after coprecipitation. The best conditions for the almost quantitative removal of copper, lead and zinc from aqueous solutions have been found.