矿产保护与利用2025，Vol.45Issue(4)：87-95,9.DOI:10.13779/j.cnki.issn1001-0076.2025.08.004
全尾砂料浆中减水剂与增稠剂对流变性能的协同作用研究
Synergism Effect of Water Reducing Agent and Thickening Agent on Rheological Properties of Full Tailings Slurry
摘要
Abstract
Admixtures are widely used to improve the filling performance of full-tailings slurry,but there is relatively little research on the mutual influence between the water reducing agent and thickening agent.To investigate the synergism and mutual site-occupancy effect of the admixtures on full-tailings slurry,the water reducing agent of polycarboxylate ether(PCE)and the thickening agent of hydroxypropyl methylcellulose(HPMC)were mixed into the molybdenum full-tailings slurry.The rheological parameters of the full-tailings slurry with different admixture dosages were obtained through rheological performance testing,and the influence of the blending of the additives on the rheological properties of the full-tailings slurry was analyzed.The carbon adsorption measurement method was employed to determine the adsorption capacity of the additives and to explore the synergism and site-occupancy mechanism between the additives in the full-tailings slurry.The results indicate that the combination of PCE(0.03%)and HPMC(0.10%)has a higher plastic viscosity and a lower yield stress,which is considered to be optimal.The synergism between the additives can be fully produced by reasonably controlling the dosage of thickeners and water reducers in the full-tailings slurry,ensuring the maximum adsorption capacity of 1.12 mg/g with minimal dosage of additives,which can not only improve the fluidity of the full-tailings slurry but also enhance its stability,thus achieving the maximization of strengths and avoidance of weaknesses.However,when the dosage of the two individual additives is excessive,the total adsorption capacity of the additives on the unclassified tailings is less than the sum of the adsorption capacity of the two single additives.This is attributed to the site-occupancy effect between HPMC and PCE,which destroys the adsorption capacity of the particles on the additives.Therefore,it is crucial to control the dosage of the different types of additives in a sensible way,so as to create a synergism between the additives that can improve the performance of the filling slurry.关键词
全尾砂料浆/减水剂PCE/增稠剂HPMC/掺量/吸附量/流变性能/占位效应Key words
tailings slurry/water reducer PCE/thickener HPMC/dosage of additives/adsorption capacity/rheological properties/site-occupancy effect分类
矿业与冶金引用本文复制引用
丁世先,陈震,张驰,陈筱艳,李一良,吴明明..全尾砂料浆中减水剂与增稠剂对流变性能的协同作用研究[J].矿产保护与利用,2025,45(4):87-95,9.基金项目
国家重点研发计划项目(2023YFC3012200) （2023YFC3012200）
河南省地质研究院2024年度地质科技攻关"揭榜挂帅"项目(2024-907-XM02) （2024-907-XM02）
