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

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第13卷    第2期    总第53期    2003年4月

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文章编号:1004-0609(2003)02-0506-05
水合硫铝酸钙的合成
刘连利1, 2, 翟玉春1, 田彦文1, 王雅静1, 韩跃新1

(1.东北大学 材料与冶金学院, 沈阳 110004; 
2.锦州师范学院 化学系, 锦州 121003
)

摘 要: 通过正交实验对水合硫铝酸钙的合成温度、 合成时间、 合成体系中CaO与Al2O3的摩尔比、 合成体系中SO42-离子的浓度等因素对其脱硅效果的影响进行了研究, 并给出了水合硫铝酸钙的最佳合成条件。 结合XRD分析和IR光谱分析讨论了水合硫铝酸钙合成机理和脱硅机理, 提出水合硫铝酸钙是一种高水合、 高度分散的含钙化合物, 其脱硅活性高。 在最佳条件下添加水合硫铝酸钙进行深度脱硅, 脱硅后的铝酸钠溶液中SiO2含量可降低到8mg/L, 硅量指数可达12500。 

 

关键字: 深度脱硅; 水合硫铝酸钙; 最佳合成条件; 铝酸钠溶液

Pulse electrodeposition of nanocrystalline nickel-iron-chromium alloy(Ⅰ)
——Techniques of electrodeposition 
GONG Zhu-qing, DENG Shu-hao, CHEN Wen-mi

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

Abstract:The influent factors in the process of synthesis of calcium hydroaluminosulfate, such as temperature, time, molar ratio of CaO vs Al2O3 and concentration of Na2SO4 were studied by orthogonal experiment. The optimum synthesis conditions of calcium hydroaluminosulfate were obtained. The reactive mechanisms on synthesis and desilication of calcium hydroaluminosulfate were discussed by analysis of XRD and IR, and it is indicated that the calcium hydroaluminosulfate is a kind of high hydration, high scattered calciferous compound. The desilication activity of calcium hydroaluminosulfate is very high. The results show that the content of SiO2 can reduce to 8mg/L and the desilication index can reach 12500 in desilicated sodium aluminate solution with addition of calcium hydroaluminosulfate in deep disilication under the optimum conditions. 

 

Key words: deep desilication; calcium hydroaluminosulfate;optimum synthetic condition; sodium aluminate solution

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

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

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