ZENG Li1, 2 ， SONG Pengcheng2 ， SUN Hongjuan2 ， PENG Tongjiang2
（1. School of Urban and Rural Construction， Chengdu University， Chengdu 610106， China; 2. a. Key Laboratory of Solid Waste Treatment and Resource Recycle， Ministry of Education; b. Institute of Mineral Materials and Application， Southwest University of Science and Technology， Mianyang 621010， China）
Abstract： 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.
Keywords: asbestos tailing; “house of cards” structure; magnesium hydroxide; magnesium oxide
中图分类号：TQ176.9 文献标志码：A
文章编号：1008-5548(2015)02-0038-05
DOI:10.13732/j.issn.1008-5548.2015.02.010
收稿日期：2014-05-12， 修回日期：2014-06-11，在线出版时间：2015-04-17。
基金项目：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。
第一作者简介：曾丽（1987—），女，硕士，助教，研究方向为固体废物处理与资源化。 E-mail: zengli512@126.com。
通信作者简介：孙红娟（1976—），女，博士，教授，硕士生导师，研究方向为矿物晶体化学和矿物材料。 E-mail：sunhongjuan@swust.edu.cn。
