【摘要】 以卤水与纯碱工业蒸氨汽（氨气和二氧化碳的混合气,体积比为5∶1）为原料制备高纯氧化镁前驱体,以净化后卤水的波美度、物料比、水热反应温度、纯化时间以及纯碱蒸氨汽的通气速率5个因素,设计5因素4水平正交试验,并通过X射线衍射和扫描电子显微镜对产物进行表征。结果表明,在卤水的波美度为25.1Bh、物料比为3∶1、反应温度为70℃、纯化时间为0.5 h、通气速率为50 ml/h的条件下可以制备出较好的4MgCO₃·Mg（OH）₂·4H₂O晶体。影响氧化镁转化率的主次因素依次为物料比、卤水波美度、反应温度、通气速率、纯化时间。更多还原

【Abstract】 High purity MgO precursor was prepared from the brine and industrial ammonia gas（ a mix with NH₃: CO₂= 5: 1）.A L16（ 45） orthogonal experiment was used to rank the influence of 5 parameters（ baume degree,brine and gas ratio,temperature,purification duration and gas adding velocity） on the production. The product was characterized by X-ray diffraction（ XRD） and electron microscope（ EM）. The results suggested that when baume degree was 25. 1,brine and gas ratio was 3∶1,temperature was 70 °C,purification duration was 1. 5 h,and gas adding velocity was 50 ml/h,the product 4MgCO₃·Mg（OH）₂·4H₂O was in better condition and was very suitable to prepare high purity Mg O in following step. In addition,the influence of 5 parameters from high to low were brine to gas ratio,baume degree,temperature,gas adding velocity and purification duration.更多还原