Sodium-modification of Ca-based bentonite via semidry process

被引：13

作者：

Huang Yan-fang ^{[1
]}

Zhang Yuan-bo ^{[1
]}

Han Gui-hong ^{[1
]}

Jiang Tao ^{[1
]}

Li Guang-hui ^{[1
]}

Yang Yong-bin ^{[1
]}

Xu Bin ^{[1
]}

Guo Yu-feng ^{[1
]}

机构：

[1] Cent S Univ, Sch Resources Proc & Bioengn, Changsha 410083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2010年 / 17卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Ca-Bent; Na-Bent; sodium-modification; semidry process; pellet binder; IRON-ORE PELLETIZATION; PELLETS; BINDERS;

D O I：

10.1007/s11771-010-0619-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to improve the quality of Hunyuan inferior Ca-based bentonite (Ca-Bent), semidry process was used to modify Ca-Bent into superior Na-based bentonite (Na-Bent). The factors affecting sodium-modification were investigated. The optimized experimental parameters are obtained as follows: Na2CO3 dosage 4.0%, ageing time 25 d, briquetting pressure 25 MPa and briquetting moisture 20%. Under the optimization conditions, the modified Na-Bent has a colloid value of 73.6 mL/(3g), dilation of 38 mL/g and water absorption in 2 h (2HWA) of 465%, respectively. The balling results indicate that the modified Na-Bent pellets have higher drop strength and compression strength than the Ca-Bent pellets.

引用

页码：1201 / 1206

页数：6

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