Sodium-modification of Ca-based bentonite via semidry process
Sodium-modification of Ca-based bentonite via semidry process
复制标题
半干法钠基膨润土改性
DOI：
10.1007/s11771-010-0619-9
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发表时间：
2010-12-01
影响因子：
--
通讯作者：
Guo Yu-feng
中科院分区：
文献类型：
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作者：
Huang Yan-fang;Zhang Yuan-bo;Guo Yu-feng
为了提高浑源劣质钙基膨润土（Ca-Bent）的质量，采用半干法工艺将Ca-Bent改性为上级钠基膨润土（Na-Bent）。探讨了影响钠化的因素。最佳工艺参数为：Na 2CO 3用量4.0%，陈化时间25 d，压块压力25 MPa，压块水分20%。在优化条件下，改性后的Na-Bent的胶体值为73.6mL/（3g），膨胀率为38 mL/g，2 h吸水率（2 HWA）为465%。造球结果表明，改性钠基球团的抗压强度和落下强度均高于钙基球团。
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: Na2CO3dosage 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.