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以铝矾土和铝酸钙粉为原料,在实验室采用酸溶二步法制备液体聚合氯化铝产品(PAC),通过实验考查制备工艺的主要影响因素,找到最佳生产条件:100～110 mL浓度为20%盐酸中,投加氧化铝含量51.22%的铝酸钙粉12 g和氧化铝含量26.50%的铝钒土15 g;最佳温度范围为100～110℃;最佳反应时间在7 h左右。在此工艺参数控制条件下,制备出液体聚合氯化铝产品的盐基度为83%,氧化铝含量为13.4%,符合GB 15892—2009《生活饮用水用聚氯化铝》的指标。
Using bauxite and calcium aluminate as raw materials, the liquid PAC was prepared by acid-dissolving two-step method in the laboratory. The main influencing factors of the preparation technology were determined through experiments and the best production conditions were found: 100 ~ In 110 mL of 20% hydrochloric acid, 12 g of calcium aluminate powder with an alumina content of 51.22% and 15 g of bauxite with an alumina content of 26.50% were dosed; the optimum temperature range was 100-110 ℃; the optimum reaction time In about 7 h. Under the control of the process parameters, the liquid base polyaluminum chloride prepared has a basicity of 83% and an alumina content of 13.4%, which is in line with the indicator of “polyaluminum chloride for domestic drinking water” in GB 15892-2009.