摘要
以石棉尾矿硫酸铵浸出液硫酸镁和氨水为原料制备"卡房"状氢氧化镁聚集体,以"卡房"状氢氧化镁为前驱体制备"卡房"状氧化镁聚集体,采用X射线衍射和扫描电子显微镜等对"卡房"状氧化镁及其前驱体的物相和形貌进行表征,并从热力学和动力学等相关理论分析探索"卡房"状氧化镁的生长机理。结果表明:在600℃时将前驱体焙烧60 min,可得到结晶完好、结构完整且与前驱体形貌一致的"卡房"状氧化镁聚集体;随着焙烧温度的升高或焙烧时间的延长,氧化镁的晶粒逐渐增大。
Taking ammonium sulfate leaching liquid from asbestos tailings and ammonium hydroxide as raw materials, the ＂house of cards＂ magnesium hydroxide was prepared. The ＂house of cards＂ magnesium oxide was prepared by the precursor of ＂house of cards＂ magnesium hydroxide. The structure and morphology of ＂house of cards＂ magnesium oxide and its precursor were characterized by means of XRD and SEM. The growth mechanism of ＂house of cards＂ magnesium oxide was studied based on corresponding thermodynamics and dynamics theories. The results indicate that ＂house of cards＂ magnesium oxide can be prepared by roasting the precursor for 60 min at temperature of 600 ℃. The ＂house of cards＂ magnesium oxide which is crystallized well inherits the features of the precursor. With the increase of calcination temperature and the prolong of calcination time, the crystallite size of magnesium oxide increases gradually.
出处
《中国粉体技术》
CAS
北大核心
2015年第2期38-42,共5页
China Powder Science and Technology
基金
四川省科技厅项目
编号:11zs2003
固体废物处理与资源化教育部重点实验室开放基金项目
编号:12zxgk04
西南科技大学研究生创新基金项目
编号:13ycjj25
关键词
石棉尾矿
“卡房”状结构
氢氧化镁
氧化镁
asbestos tailing
＂ house of cards ＂ structure
magnesiumhydroxide
magnesium oxide
