标题：Study on Preparation of High-strength Gypsum by FGD Gypsum作者：Wang, Xiaoshu; Zhou, Min; Hou, Haobo; Wang, Weixing; Shao, Yan

来源出版物：SELECTED PROCEEDINGS OF THE EIGHTH INTERNATIONAL CONFERENCE ON WASTE MANAGEMENT AND TECHNOLOGY 丛书：Advanced Materials Research卷：878页：292-297 DOI：10.4028/www.scientific.net/AMR.878.292 出版年：2014

会议名称：8th International Conference on Waste Management and Technology (ICWMT 8)会议地点：Shanghai, PEOPLES R CHINA 会议日期：OCT 23-25, 2013

摘要：With the enlarging of industrial desulfurization, the amount of FGD gypsum is increasing rapidly. The preparation of alpha-calcium sulfate hemihydrate (alpha-HH) is one of the biggest concerns for FGD gypsum reclamation. The influence of mixed chlorate solution of Mg-Ca-Na concentrations (5-30 wt%) and FGD gypsum concentrations(5-30 wt%) by hydrothermal salt solution method at atmospheric were investigated at temperatures (75-99 degrees C) within a reaction time of 4h and a pH value of neutral. The results showed that 20 wt%, 20 wt% and 97 degrees C was respectively optimal parameter of salt media concentration, FGD gypsum concentration and temperature. Products obtained from the dehydration process of optional experimental conditions with mixed crystal modifier were characterized based on relevant standards in this study. The results showed that alpha-IIH had integrity crystal structure, 2h flexural strength and oven dry compressive strength were 5.34MPa and 30.21MPa, which had meet the industry standards of alpha 30 grade.

入藏号：WOS:000336869100038

文献类型：Proceedings Paper

语种：English

作者关键词：FGD gypsum, High-strength gypsum, Hydrothermal method

扩展关键词：CALCIUM SULFATE HEMIHYDRATE

通讯作者地址：Zhou, Min; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：wangxshj@163.com; zhoumin@whu.edu.cn; hhb-bhh@163.com;

thwwx01@whu.edu.cn; shaoshu.yan@163.com

地址：

[Wang, Xiaoshu; Zhou, Min; Hou, Haobo; Wang, Weixing; Shao, Yan]Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

研究方向：Engineering; Materials Science

ISSN：1022-6680

ISBN：978-3-03785-982-7