尾砂浆体仓式浓密技术及其充填应用

Tailing slurry warehouse thickening technology and its application in mine filling

矿山尾砂充填料浆物料由尾砂浆体、胶结剂和调浓水组成。尾砂浆体质量浓度的稳定性关系充填料浆制备质量浓度的稳定性,同时决定充填料浆制备的最高质量浓度,是充填料浆制备的核心要素,也是充填成本和质量控制的关键。矿山尾砂充填领域的仓式浓密装备主要有砂仓、深锥浓密机、深锥浓密机和砂仓组合浓密,以及膏体仓储浓密机。膏体仓储浓密机没有耙式系统,膏体仓储浓密机能长时间可靠储存高浓度尾砂浆体,解决矿山采矿—选矿—充填突出的时空矛盾关系,通过系列组合可适用于各型规模矿山,近年来得到广泛应用。在某金矿开展膏体仓储浓密机技术工业应用,尾矿-0.038 mm占66.52%,浓密机溢流水含固量小于200×10-6,浓密机底流尾砂浆体质量浓度达到56%,过程中波动<1%,放砂浓度稳定,充填料浆质量浓度59%~61%,充填料浆体积泌水率<3%。

The mine tailings filling slurry material is composed of a tailing mortar body,cementing agent,and concentrated water.The stability of the mass concentration of tail mortar is related to the stability of the mass concentration of filling slurry preparation,and at the same time,it determines the highest mass concentration of filling slurry preparation,which is the core element of filling slurry preparation,and also the key to filling cost and quality control.The warehouse thickening equipment in the field of mine tailings filling mainly includes sand silo,deep cone thickener,deep cone thickener and sand silo combination dense,and paste storage thickener.The paste storage thickener has no rake system,and the paste storage thickener can reliably store high-concentration tail mortar for a long time,to solve the outstanding space-time contradiction relationship of"mining-beneficiation-filling"in mines,and can be applied to mines of various sizes through a series combination,and has been widely used in recent years.In a gold mine,the industrial application of paste storage thickener technology was carried out,tailings-0.038 mm accounted for 66.52%,the solids content of thickener overflow water was less than 200×10-6,the mass concentration of the underflow tail mortar of the thickener reached 56%,the fluctuation in the process was<1%,the sand concentration was stable,the mass concentration of filling slurry was 59%-61%,and the volume water secretion rate of filling slurry was<3%.