重镁水添加乙醇热解制备高纯氧化镁  

High Purity Magnesia Preparation from Mg(HCO_3)_2 with Ethanol Addition

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,武汉430213

出　　处：《有色金属》2009年第1期77-80,共4页Nonferrous Metals

摘　　要：以轻烧白云石粉料为原料,采用碳化法,在重镁水热解过程中加入乙醇制备出MgO含量大于99.7%的氧化镁样品,研究乙醇用量、热解温度对氧化镁样品纯度和MgO回收率的影响。氧化镁纯度随乙醇用量的增大而降低,随热解温度的升高而降低,重镁水分解率随乙醇用量的增大和热解温度的升高呈上升趋势。制备高纯度氧化镁的最佳工艺条件为热解温度50℃,乙醇体积含量40%。XRD表明样品为立方晶系。The high purity magnesia with content more than 99.7 % is prepared by carbonation process with ethanol addition in magnesia bicarbonate solution thermal decomposition, and the effects of ethanol dosage and the processing temperature on the purity and product yield of MgO are studied. The raw material is the light burning dolomite. The results show that the purity of MgO is declined and the product yield is increased with the increase of the ethanol dosage or the processing temperature. Finally the optimal paramenters of 50°C and 40% （volume percent） of ethanol in this experiment are confirmed. It is shown by XRD that the resulted sample is cubic structure crystal.

关 键 词：无机化学工程 高纯氧化镁 碳化法 轻烧白云石 热解 

分 类 号：TQ132.2[化学工程—无机化工]