化工进展Issue(3)：714-719,6.DOI:10.3969/j.issn.1000-6613.2014.03.033
用六水氯化镁制备高纯镁砂工艺
Research on preparation of high purity magnesite from MgCl2·6H2O
摘要
Abstract
A precursor of high purity magnesite was prepared from bischofite (MgCl2·6H2O) as raw material,Na2CO3 as precipitant,dropping into the reactor at the same time through peristaltic pumps at 35 ℃. The main composition of the precursor was MgCO3·2H2O by XRD. MgCO3·2H2O was calcined at 800 ℃ for 2 h in order to obtain high purity active MgO powders with good particle size distribution. Then coconut shell activated carbon,nut shell activated carbon and tar activated carbon were added as the second phase in the process of vacuum sintering. Coconut shell activated carbon was proved to be the best choice under the same conditions. Subsequently,0.03%~0.05%of coconut shell activated carbon distinctly improved the sintering performance of magnesia. Consequently,sintered magnesia was prepared by sintering at 1600 ℃ for 5 h under vacuum sintering ,whose bulk density was higher than 3.4 g/cm3,purity was higher than 98.5%.关键词
前体/椰壳活性炭/真空烧结/高纯镁砂Key words
precursor/coconut shell activated carbon/vacuum sintering/high purity magnesia分类
化学化工引用本文复制引用
谢垚,陈镇,吴玉龙,杨明德,魏丽乔,丁冉冉..用六水氯化镁制备高纯镁砂工艺[J].化工进展,2014,(3):714-719,6.基金项目
国家“十一五”科技支撑重点项目（2008BAB35B05）及教育部新世纪优秀人才奖励计划项目（NCET-12-0308）。 （）
