铝酸钠溶液添加硫酸钙脱硅过程的研究

Study on desilication process of sodium aluminate solution by adding calcium sulfate

以硫酸钙作为脱硅剂,对铝酸钠溶液脱硅条件和结果进行了研究。实验中考察了脱硅温度、脱硅时间、脱硅剂的用量、搅拌速度对脱硅效果的影响,确定了最佳脱硅工艺条件:在95℃的温度下添加硫酸钙30g/L深度脱硅90min,精制液的硅量指数达3681。对硫酸钙脱硅后所形成的硅渣进行XRD测定,并且对硫酸钙的脱硅机理进行了分析。

The desilication process from the sodium alumination solution with calcium sulfate is investigated. The optimum results show that the silica module reaches to 3681 by 90 min, deep desilication with 30g/L calcium sulfate at 95℃ . Mechanism of sodium alumination solution is analyzed by XRD . The Calcium sulfate is a promising agent for desilicatin on from sodium alumination solution.