Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 13    No. 5    October 2003

[PDF Download]    [Flash Online]    

    

Stability of calcium silicate in basic solution
LIU Gui-hua(刘桂华), LI Xiao-bin(李小斌),
PENG Zhi-hong(彭志宏), ZHOU Qiu-sheng(周秋生)

School of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China

Abstract:Mixture of CaO and SiO2 was sintered at 1200 or 1400℃ according to the mole ratio of CaO/SiO2 of 1 or 2, and then calcium silicate was leached in pure caustic or soda solution. The results indicated that calcium silicate exists much more stably in caustic solution than that in soda solution, and CaO·SiO2 is more stable than β-2CaO·SiO2 whether in caustic solution or in soda solution. The increase of sintering temperature favored the stability of calcium silicate in the leaching process. When β-2CaO·SiO2 was leached in soda solution, the increase of leaching temperature and time resulted in decomposing of more calcium silicate. And when β-2CaO·SiO2 was leached in caustic solution at high temperature, much 2CaO·SiO2·H2O but little CaO·SiO2·H2O appeared in slag.

 

Key words: calcium silicate; stability; caustic/soda solution

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com