工程科学学报2016，Vol.38Issue(10)：1343-1349,7.DOI:10.13374/j.issn2095-9389.2016.10.001
全尾砂膏体搅拌剪切过程的触变性
Thixotropy of unclassified pastes in the process of stirring and shearing
摘要
Abstract
The thixotropy of pastes is a complex rheology phenomenon, which concerns paste mixing preparation, pipeline trans-portation, flowing in stopes and many other aspects. But currently it is difficult to interpret many kinds of thixotropy-related phenomena in unclassified tailing paste technology due to the lack of a common understanding of its mechanism. To explain the thixotropic behav-ior of a unclassified tailing paste in the process of stirring, the impacts of unclassified tailing particle size, slurry concentration, addi-tion of cement and standing time on the paste thixotropy were studied by conducting rheological experiments of the paste in different conditions of a certain mine, and the thixotropic behavior of the paste and its influence on the stability were analyzed. The results show that unclassified tailing particles disperse in the slurry in the form of three-dimensional network structure, and their thixotropy and yield stress are relevant to the stability of the slurry. Influenced by ultrafine composition, cement- tailing ratio and slurry concentra-tion, the thixotrophic characteristics of the paste can be divided into two process, shear failure and standing recovery. Besides, the paste’ s rheology characteristics will change over time.关键词
膏体/触变性/流变特性/搅拌/剪切Key words
pastes/thixotropy/rheological characteristics/stirring/shearing分类
矿业与冶金引用本文复制引用
杨柳华,王洪江,吴爱祥,邢鹏,高维鸿..全尾砂膏体搅拌剪切过程的触变性[J].工程科学学报,2016,38(10):1343-1349,7.基金项目
国家自然科学基金资助项目(51374034) （51374034）
