新疆钙基膨润土常压低温焙烧法制备活性白土  

Activated Clay Prepared by Calcination of Xinjiang Calcium Bentonite under Atmospheric and Low Temperature

作　　者：周梦雨 肖莎 高铜熙 彭同江[1,2,3] ZHOU Meng-yu;XIAO Sha;GAO Tong-xi;PENG Tong-jiang(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Mianyang 621010,China;Institute of Mineral Materials and Application,Southwest University of Science and Technology,Mianyang 621010,China;Analytical and Testing Center,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学矿物材料及应用研究所,四川绵阳621010 [3]西南科技大学分析测试中心,四川绵阳621010

出　　处：《中国非金属矿工业导刊》2023年第1期70-73,共4页China Non-Metallic Minerals industry

基　　金：2022年四川省大学生创新创业训练计划项目(编号:S202210619080)。

摘　　要：以新疆夏子街钙基膨润土为原料,浓硫酸为活化助剂,采用常压低温焙烧法制备活性白土,探究了浓硫酸用量、焙烧温度及焙烧时间对活化产物物相结构和脱色率的影响。结果表明:在浓硫酸/膨润土质量比21%、活化时间12min、焙烧温度180℃条件下,所制备的活性白土脱色率最高(98.16%),活性白土样品的脱色率等均满足我国行业标准各类型活性白土一等品要求。同时,常压低温焙烧法制备活性白土有效降低了浓硫酸的用量,解决了常规活性白土生产过程中耗水量大的问题,具有较好的经济意义和应用前景。The activated clay was prepared by atmospheric low temperature roasting with the calcium bentonite from Xiazijie of Xinjiang as raw material and concentrated sulfuric acid as activation agent. The effects of the dosage of concentrated sulfuric acid, roasting temperature and roasting time on the phase structure and decolorization rate of activated products were investigated.The results showed that the optimum conditions for the prepared activated clay were as follows: the mass ratio of concentrated sulfuric acid to bentonite was 21%, the activation time was 12min, the roasting temperature was 180 ℃, the decolorization rate was 98.16%, and the decolorization rate of activated clay samples all met the industry standard requirements of various types of first grade activated clay in our country. The preparation of activated clay by atmospheric pressure low temperature roasting reduces the amount of concentrated sulfuric acid and solves the problem of high water consumption in the production of conventional activated clay.

关 键 词：膨润土 常压低温焙烧 浓硫酸 活性白土 

分 类 号：TB321[一般工业技术—材料科学与工程] TD875.5[矿业工程—非金属矿开采]