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

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

會議名稱：8th International Conference on Waste Management and Technology (ICWMT 8)會議地點：Shanghai, PEOPLES R CHINA 會議日期：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

文獻類型：Proceedings Paper

語種：English

作者關鍵詞：FGD gypsum, High-strength gypsum, Hydrothermal method

擴展關鍵詞：CALCIUM SULFATE HEMIHYDRATE

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

電子郵件地址：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