【摘要】 文章探索以吉兰泰盐湖卤水的沉淀镁泥为镁源,制备高纯、超细氢氧化镁的工艺条件。考察了操作条件对沉淀镁泥酸化提镁、酸浸液净化除钙效率的影响。实验结果表明,以净化后的酸浸液为镁源,以氨水为沉淀剂,添加分散剂PEG2000,并采用适宜工艺条件,可制备超细氢氧化镁粉体。对所得氢氧化镁样品用X射线粉末衍射仪和透射电子显微镜进行形貌、物相和纯度的表征,采用HG/T3607-2000标准中的方法对氢氧化镁样品进行主要成分及含量分析,结果表明,氢氧化镁样品为多边形片状,分散性较好,平均粒径为89.5nm,纯度达到了HG/T3607-2000标准。更多还原

【Abstract】 A new process for preparing high-purity and ultrafine magnesium hydroxide with precipitated magnesium mud was studied.The effects of operation conditions on leaching yield of magnesium ions from precipitated magnesium mud and removal yield of calcium ions from acid leaching solution were investigated.The results indicated that ultrafine magnesium hydroxide powders were prepared by chemical precipitation method with hydrochloric acid leaching solution purified and ammonia as raw materials as well as suitable amount of PEG2000 as dispersant agent.The samples obtained under proper conditions were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM) and particle size distribution analyzer and determined by the method in HG/T3607-2000.The results showed that the mean particle size of magnesium hydroxide was 89.5nm,with flake shape,fine dispersion,and hexagonal crystalloid configuration.The sample specifications coincided with the standard stipulated in HG/T3607-2000.更多还原