摘要
研究了搅拌速度、降温方式、pH值及晶种对磷酸二氢钾结晶影响规律。搅拌速度为400 r/min时,料浆悬浮均匀,所得粒径最大;自然降温方式所得晶体平均粒度较大;pH值等于3.0时,介稳区宽度最小,结晶量最大;随着晶种加入量的增大,产品粒度分布趋于集中,加入晶种且过饱和度为3%时可得到较好的粒度分布。
The effects of agitating rate, cooling way, pH value and seed on crystallization of KDP were studied in the batch crystallization experiment. The results show that： when the agitating rate is 400 r/min, the flow situation is good and the crystal size is maximal. The crystal size is larger by natural cooling. When the pH value is 3.0, the metastable zone width is the lowest and the output of crystals is the highest. With the increase of addition of amount of seed, the size distribution of the product tends towards concentration. When the supersaturation is 3% with the seed being added, the size distribution is better.
出处
《化工矿物与加工》
CAS
北大核心
2009年第1期9-12,共4页
Industrial Minerals & Processing
关键词
磷酸二氢钾
结晶
粒度分布
potassium dihydrogen phosphate
crystallization
granularity distribution
