重镁水真空热解法制备高纯氧化镁  

Preparation of High Purity Magnesia Through Pyrogenation of Mg(HCO_3)_2 Solution under A Vacuum

作　　者：郭小水[1] 刘家祥[1] 李敏[1] 饶发明[2] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,材料科学与工程学院,北京100029 [2]武汉钢铁集团矿业有限责任公司乌龙泉矿,湖北武汉430213

出　　处：《非金属矿》2008年第3期33-34,62,共3页Non-Metallic Mines

摘　　要：以轻烧白云石粉料为原料,采用碳化法工艺,在一定真空度下将重镁水加热分解制备出MgO含量为99.7%的样品,XRD表征表明样品为立方晶系。研究了液面压强对氧化镁样品纯度、MgO提取率及杂质CaO含量的影响,结果表明,重镁水在0.015MPa下热解所制备的氧化镁纯度为99.7%,氧化钙含量0.12%,氧化镁提取率为70%。With the light-burned dolomite powder as raw material and the carbonization process, high purity magnesia has been prepared through vacuum-pyrogenation of Mg（HCO3）2 solution, and the magnesia prepared has a high purity of 99.7%. The influences of the pressure over the solution to the puri~ and extraction ratio of MaO and the content of CaO have been studied. The results show that when the pressure is 0.015MPa, the MgO prepared has a purity of 99.7% and the extraction ratio is 70%, and impurity of CaO is 0.12%. XRD pattern shows that MgO sample is cubic structure crystal.

关 键 词：轻烧白云石粉 碳化法 真空热解 氧化镁 

分 类 号：TQ132.2[化学工程—无机化工]