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一种利用铜尾矿制备水泥的尾矿资源化处理方法
Authors
晏波
肖贤明
陈涛
Publication date
20 May 2011
Publisher
Abstract
本发明公开了一种利用铜尾矿制备水泥的尾矿资源化处理方法,混合含水率为50%的铜浮选尾矿和固化剂,混合质量比为3∶7,固化剂由水泥熟料、硫酸钙和外加添加剂按质量比80~90∶3~12∶7~8混合,所用添加剂为硫酸铝、硫酸铁和高岭土按任意配比组成,机械混合尾矿和固化剂8~10min。混合后的固化块前体在养护湿度为95%,温度为25±1℃的条件下养护。制成的水泥块强度28d抗压强度大于42.5MPa,28d抗折强度大于6.5MPa,满足矿渣硅酸盐水泥42.5R级水泥强度要求;尾矿水泥安定性、凝结时间等水泥性能指标均符合《普通硅酸盐水泥标准》(GB175-2007),养护形成的水泥块重金属浸出量满足《危险废物鉴别标准-浸出毒性鉴别》(GB5085.3-2007)标准。该发明既可以处置铜选厂尾矿使铜矿企业达到尾矿零排放目的,又可以回收尾矿用作建筑材料,达到回收利用尾矿的目的。本发明具有原料易得、成本低、效果稳定、操作程序简单等优点
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Last time updated on 27/11/2019