文献类型：期刊文献

中文题名：钾盐尾矿胶结工艺的优化研究

英文题名：Process Optimization of Tailings Cementation from Potash Production

作者：鲍园[1];许妍霞[1];宋兴福[1];于建国[1]

机构：[1]华东理工大学国家盐湖资源综合利用工程技术研究中心,上海200237

年份：2016

卷号：42

期号：3

起止页码：308

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：钾盐尾矿;胶凝;工艺优化

外文关键词：potash tailings; gelation; process optimization

摘要：采用市售不同品位的轻烧氧化镁(65粉、70粉、75粉和85粉)对钾盐尾矿胶凝效果进行分析,同时考察钾盐尾矿胶凝过程中工艺条件对胶凝时间、流动性、流变性能和物性参数的影响。实验结果表明:65粉最适合于钾盐尾矿胶结回填的胶凝剂,胶凝性能随胶凝剂掺量的增加、胶凝时间的缩短而变优;温度影响反应速率和黏度,低温不利于胶凝反应和膏体胶凝性能;通过研究氧化钙和氯化钠这两种杂质对胶凝过程的影响,发现添加氧化钙可以加速胶凝反应,增强膏体的持水性能。
The effects of different caustic calcined magnesias on the potash tailings cementation were analyzed according to the nature of light burned magnesium oxide （grade 65,70,75,85）, and the effects of operating conditions on the gelation time, fluidity, rheological properties and physical parameters during the process of cementing tailings were also investigated. The results showed that the caustic calcined magnesia of grade 65 was the most suitable gelling agent in the backfill of the potassium tailings. Meanwhile, the gelling effect became better with the increase of gelling agent dosage and the reduction of curing time. Temperature was found to have direct effect on the reaction rate and viscosity, and low temperature did not favor the gelation reaction and paste cementing performance. By studying the effect of impurity （CaO and NaCl） on gelling process,CaO was found to be able to accelerate the cementation reaction and enhance the water-holding capacity performance of cemented paste.