分解工艺制度对碳分产品粒度的影响

The Influences of Decomposition Technological System on Particle Size of Carbonation Product

采用间断碳分的方法,研究了不同搅拌和晶种添加情况对铝酸钠溶液碳酸化分解产品粒度的影响规律。结果表明:采用先快后慢搅拌制度有利于提高产品粒度;随着晶种系数的增大产品平均粒径先增大后减小,晶种系数～0.32达到最大;产品平均粒径随着晶种粒度的增粗而增大,添加粗晶种时,20～45μm颗粒间仍可发生明显附聚。通过控制合适分解工艺,可获得粒度较粗、分布均匀的砂状Al(OH)3产品。

The influences of different stirring system and AI（OH）3 seeds addition on particle size of carbonization product from sodium aluminate solution were investigated. The results show that it is helpful to increase the particle size by the stirring system with fast followed by slow; the particle size of carbonation product increases at first, then decreases by increasing the seed coefficient, and reaches the maximum when the seed coefficient is about 0.32; the particle size of carbonation product increases along with increasing the particle size of seeds, the agglomeration between relatively coarse particles （20-45 μm） also occurs with the relatively coarse seeds added. Very narrow distributed AI（OH）3 product with coarse average size can be gained through regulation of the carbonation process.