Performance characteristics of EZhou bentonite of Hubei province and its modification  

作　　者：Long Wei Fan Zitian Hu Xueting 

机构地区：[1]State Key Laboratory of Material Processing and Die ＆ Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

出　　处：《China Foundry》2009年第4期308-313,共6页中国铸造（英文版）

基　　金：supported by the National Natural Science Foundation of China(50575085)

摘　　要：Both the chemical compositions and performance characteristics of the bentonite raw ores in Ezhou area of Hubei province and Honghuoshan area of Liaoning of these two kinds of bentonites were tested before and province were compared and analyzed. The properties after Na^＋- and Li^＋-modification. The results show that the Ezhou bentonite ore possesses higher montmorillonite content than the Honghuoshan bentonite ore, but the Ezhou Na-bentonite has weaker castability （e.g. wet compression strength and hot wet tensile strength） than the Honghuoshan Na-bentonite, while the performance of Ezhou Li-bentonite, such as colloid index, swelling value, swelling volume and mould coating performance, is equivalent to that of the Honghuoshan Na-bentonite.Both the chemical compositions and performance characteristics of the bentonite raw ores in Ezhou area of Hubei province and Honghuoshan area of Liaoning province were compared and analyzed.The properties of these two kinds of bentonites were tested before and after Na+-and Li +-modification.The results show that the Ezhou bentonite ore possesses higher montmorillonite content than the Honghuoshan bentonite ore,but the Ezhou Na-bentonite has weaker castability(e.g.wet compression strength and hot wet tensile strength)than the Honghuoshan Na-bentonite,while the performance of Ezhou Li-bentonite,such as colloid index,swelling value,swelling volume and mould coating performance,is equivalent to that of the Honghuoshan Na-bentonite.

关 键 词：Ezhou bentonite Honghuoshan bentonite NA-BENTONITE Li-bentonite performance characteristic 

分 类 号：TG221.1[金属学及工艺—铸造] TQ424.2[化学工程]