基于选矿流程的尾矿优选组合膏体充填技术

摘要

为优化膏体充填骨料粒级级配,提出了基于选矿流程的尾矿优选组合膏体充填工艺技术.该技术统筹考虑充填方案、充填成本等因素,基于选矿流程多环节生产尾矿的条件,将不同级配、化学成分合理的尾矿按照一定的比例进行混合,制备出级配连续的混合尾矿.通过开展尾矿基础参数测试、沉降试验、析水试验、流动性试验研究,确定了基于选矿流程的充填技术工艺优化方案,并开展了工业现场验证.基于尾矿级配优化的膏体充填技术科学可行,具有广泛的适用性,是一种先进的矿山充填技术.%Cemented paste backfill (CPB) is increasingly applied in underground mines world-wide and has a broad prospect considering its benefits in environmental protection and ground control.During the paste production,a well-graded aggregate is critical for the achievement of CPB.Mine tailings from the outcome of ore-dressing plant are commonly used as the fill aggregate.However,it is difficult to obtain an ideal particle size distribution for the mine tailings which are roughly mixed with final residuum in ore concentration processes.In this study,a novel industrial method is proposed to select fill aggregates from different parts of ore-dressing processes.With combined design of concentration plant and backfill plant,the tailings with desired particle sizes and proportions during the mineral processing are chosen to produce CPB without disturbing the regular ore concentration.The problems of passively accepting final tailings from ore-dressing plant has been improved.