稳定铝酸钠溶液分解产品氢氧化铝的粒度波动

为解决铝酸钠溶液种分过程中产品氢氧化铝粒度出现的周期性细化问题,在实验室模拟工业条件,主要从添加剂、细种子添加量和碳分晶种对产品氢氧化铝粒度的影响进行了研究.研究发现,把添加剂的使用和晶种粒度的控制相结合可以减弱周期性波动的振幅,缩短细化时间;通过补充细种子可使用于分解的种子粒度分布比较均衡,能够减弱产品氢氧化铝粒度产生周期性波动的幅度;在种分过程中加入部分碳分晶种可获得粒度比较稳定的氢氧化铝产品.

Stabilizing Fluctuation of Al(OH)3 Particle Size in Seeded Precipitation of Sodium Aluminate Solution

To solve the problem of periodically explosive attenuation of Al(OH)_3 particles in seeded precipitation process of sodium aluminate solution,the effects of additives used,adding amount of fine seeds and carbonization seeds on Al(OH)_3 particle size were investigated under industrial conditions modeled in laboratory.The results indicated that combining properly additives used with the control of seed size is able to reduce the amplitude of periodical fluctuation and shorten the time required for Al(OH)_3 particle size attenuation.The distribution of dissolvent seed size becomes more uniform by replenishing fine seeds,thus enabling the periodcal fluctuation of Al(OH)_3 particle size to be attenuated.Moreover,adding partly carbonization seeds in seed precipitation process can acquire more stable Al(OH)_3 products.