【摘要】 研究了基于醋酸提取钢渣中钙离子所获得的醋酸钙溶液碳化固结CO2并制备沉淀碳酸钙的可行性,借助于XRD,TG-DTA对碳化后生成的沉淀物进行了成分分析和综合热分析.结果表明:醋酸钙溶液需掺入氢氧化钠,将其中的醋酸钙转化成氢氧化钙,方可碳化生成沉淀碳酸钙;在由醋酸提取钢渣中钙离子所获得的醋酸钙溶液中掺入足量氢氧化钠,可使其中的钙离子碳化生成沉淀碳酸钙,但该碳酸钙的纯度(质量分数)仅为60%左右,钙离子转化率(质量分数)仅为35.00%左右,如果将该溶液进行分离处理,除去其中其他离子的干扰,则可高效碳化成高纯度沉淀碳酸钙.更多还原

【Abstract】 The possibility of fixation of CO2 and production of precipitated calcium carbonate by carbonating acetate solution of calcium extracted from steel slag was investigated.The composition of precipitate produced after carbonation was then analyzed with XRD and TG-DTA.The results show that calcium acetate must be converted into calcium hydroxide by adding sodium hydroxide into calcium acetate solution and then precipitated calcium carbonate can be produced by carbonating the solution.Acetate solution of calcium extracted from steel slag can be carbonated by adding enough sodium hydroxide but the purity of precipitated calcium carbonate produced is only about 60% and the conversion of calcium is only about 35.00%.To improve the effect of carbonation and to produce precipitated calcium carbonate with a high purity,other ions dissolved in steel slag should be removed from acetate solution of calcium extracted from steel slag.更多还原