除钙解析液分析研究

Analysis of calcium-removing solution

本文以“一步酸溶法”提取氧化铝工艺中树脂除钙工序产生的除钙解析液为研究对象,通过开展树脂吸附和沉淀结晶两种技术手段,实现溶液中的铝钙分离。解析液中钙离子浓度通过树脂吸附和转型沉淀进一步得到富集,再通过蒸发结晶烘干可获得氯化钙型融雪剂。文中主要研究了温度、流速、酸度等因素对树脂吸附和解析的影响,绘制吸附、解析曲线,确定了最佳实验条件。同时对制取的融雪剂从融冰速度、酸碱度测定及腐蚀性能方面进行检测,产品效果较好,具有良好的实用性能。

In this paper, the separation of aluminum and calcium from the solution was realized through resin adsorption and precipitation crystallization, with the calcium-removing solution produced from the resin decalcification process in the "one-step acid dissolution" extraction of alumina as the research object. The calcium ion concentration in the solution was further enriched by resin adsorption and transformation precipitation, then the calcium chloride snow-melting agent was obtained through evaporation, crystallization and drying. The effects of temperature, flow rate and acidity on the adsorption and resolution of the resin were studied. The adsorption and resolution curves were prepared to determine the optimum experimental conditions. Meanwhile, the snow-melting agent was tested in terms of the deicing rate, pH and corrosion property. The product had good effect and practical performance.