以硫酸盐亚型盐湖卤水为原料制备高纯轻质氧化镁  

Preparation of high-purity light magnesia from sulfate salt subtype salt lake brine

作　　者：徐徽[1] 刘卫平[1] 杨喜云[1] 石西昌[1] 陈世月[1] 余亮良[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2011年第8期2204-2208,共5页Journal of Central South University:Science and Technology

基　　金：中央专项中南大学前沿研究计划重点项目(2010QZZD003);国家科技支撑计划"十一五"重大项目(2008BAB35B04)

摘　　要：以硫酸盐亚型盐湖卤水为原料,采用氨法沉镁—碳酸氢铵碳化—煅烧的工艺制备轻质氧化镁。研究碳酸氢铵过量系数、碳酸氢铵浓度、温度与时间对碳化过程的影响,确定制备轻质氧化镁的最佳工艺条件。研究结果表明:经碳化煅烧得到的氧化镁产品纯度大于99%,S和B含量降低,视比容为10 cm3/g,质量指标远优于国家轻质氧化镁标准要求。Using sulfate salt subtype salt lake brine as raw materials,light-magnesia was prepared by the technology of ammonia precipitation,ammonium bicarbonate carbonation and calcination.The effects of the excessive coefficient of ammonium bicarbonate,concentration of ammonium bicarbonate,temperature of reaction and time of reaction on the carbonization ratio of ammonium bicarbonate were investigated,and the optimum process for preparation of light magnesia was obtained.The results show that the contents of element S and B are decreased,the apparent gravity is increased to 10 cm3/g,and the purity of magnesium oxide is greater than 99% due to carbonation,which is better than national standard of light magnesia.

关 键 词：轻质氧化镁 硫酸盐亚型卤水 碱式碳酸镁 

分 类 号：TQ123.4[化学工程—无机化工]