高浓度铝酸钠溶液种分晶体长大速度研究  

Study on Crystal Growth Speed in Sodium Aluminate Solution with High Concentrate

作　　者：白万全[1] 李晓萍[1] 武国宝[1] 王亚东[1] 尹中林[1] 

机构地区：[1]中国铝业股份有限公司郑州研究院,河南郑州450041

出　　处：《有色金属（冶炼部分）》2005年第4期24-27,共4页Nonferrous Metals（Extractive Metallurgy)

摘　　要：用实验室间歇式结晶器进行了高浓度铝酸钠溶液晶体长大过程研究,使用电敏粒度计数仪测试出单位重量的颗粒数,通过多次循环试验数据对比判断晶体的长大速度.试验溶液苛性碱浓度为155和175g/L,温度61～51℃,每次循环试验分解40h.循环试验的粒度变化发现:铝酸钠溶液分解过程中,晶体长大速率较慢;苛性碱浓度为175g/L的溶液,在分解长大过程中细颗粒(-20μm)晶体长大速度较苛性碱浓度为155g/L溶液的晶体长大速度慢;浓度对相对较粗颗粒(60μm以上)晶体长大趋势的影响不明显.Crystal growth speed in sodium aluminate solution with high concentration is studied using a laboratory batch crystallizer. The number of grain per gram was tested by ELZONE micromeritics. Crystal growth speed was estimated after the results were compared. In the present study, crystal growth experiments were performed at 61-51℃ in 40h, and the caustic concentration is 155 and 175g/L respectively. The results show that Crystal growth speed was very slow under the present experimental condition. Crystal growth speed of fine particle （ - 20μm in diameter） in aluminate solution with caustic concentration of 175g/L was slower than that in aluminate solution with caustic concentration of influences growth speed of coarser seed （ ＋ 60μm in 155g/L. It was not evident that the caustic concentration diameter）.

关 键 词：铝酸钠溶液 晶体长大 电敏粒度计数仪 

分 类 号：TF821[冶金工程—有色金属冶金]