水合铝酸钙合成条件的优化研究  

Optimization of the Synthesis Conditions of Alcium Aluminate Hydrate

作　　者：冯延磊 

机构地区：[1]河南能源化工义煤公司义翔铝业,河南三门峡472435

出　　处：《广东化工》2015年第7期55-58,共4页Guangdong Chemical Industry

摘　　要：通过试验研究了温度、[Ca O]/[Al2O3]分子比、时间、添加剂对合成拜耳法粗液叶滤助剂水合铝酸钙粒度的影响。研究表明：[Ca O]/[Al2O3]分子比影响较大,其他次之。水合铝酸钙合成的最佳条件：95~100℃、[Ca O]/[Al2O3]=3、搅拌2小时、所得水合铝酸钙20~40微米之间的颗粒接近50%。脱水剂、N85711絮凝剂、葡萄糖酸钠等添加剂不能提高水合铝酸钙的粒度。We study the impact of temperature, [CaO]/[AI203] molecular ratio, time, and additives on the granularity of calcium aluminate hydrate, vane filter aids synthesized through crude liquid Bayer. Experiments indicate that： the impact of molecular ratio （[CaO]/[AI203]） is greater than others. Finally we conclude that the optimal synthesis conditions of is： 95-100 ~C, [CaO]/[AI2O3]=3, and stirred for 2 hours, under which nearly 50 % of the particles obtained is between 20-40 microns. In addition, we find that additives such as dehydrating agent, N85711 flocculant and so on, cannot..

关 键 词：氧化铝 水合铝酸钙 控制过滤 叶滤机 拜耳法粗液 

分 类 号：TQ[化学工程]