以便改进 Hunyuan 劣等的 Ca-based 火山灰成胶状黏土(Ca-Bent ) 的质量, semidry 过程被用来修改 Ca-Bent 进优异基于 Na 的火山灰成胶状黏土(Na-Bent ) 。影响钠修正的因素被调查。优化试验性的参数如下被获得:Na2CO3 剂量 4.0% ,变老的时间 25 d, briquetting 压力 25 MPa 和 briquetting 潮湿 20% 。在优化条件下面,修改 Na-Bent 有 73.6 的胶体价值 mL/(3g ) , 38 mL/g 的膨胀和在 465% 的 2 h (2HWA ) 的水吸收分别地。成球形的结果显示修改 Na-Bent 小团比 Ca-Bent 小团有更高的落下力量和压缩力量。
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 bailing results indicate that the modified Na-Bent pellets have higher drop strength and compression strength than the Ca-Bent pellets.