全尾砂固结脱水关键技术探讨  

Study on key dehydration and consolidation technology of tailings

作　　者：樊攀峰[1] 戴相宇 王果[1] 周殿奇 周玉[1] 孙学凯[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点试验室,北京100083

出　　处：《有色金属（矿山部分）》2015年第3期57-61,共5页NONFERROUS METALS(Mining Section）

基　　金："十二五"国家科技支撑计划项目(2013BAB02B04)

摘　　要：全尾砂固结排放能减少地表尾矿库引发的地质灾害与环境污染.固结剂配制与脱水工艺是其关键技术.基于多因素正交试验,选择满足西石门全尾砂固排所需的固结剂组分,在微观上采用XRD、SEM对所选固结剂的水化机理与胶结性能进行分析,研究对水泥的可替代性.对不同浓度全尾砂浆运用不同脱水设备进行三阶段工业试验,得到各自产能规律,其中圆盘真空过滤机产能高且对砂浆浓度不敏感,适用于该铁矿浓密机底流40％～45％的浓度区间;对于滤后试块成型率低,基于压汞试验得到滤饼孔隙率等微观结构参数,间接测得强度0.78MPa,大于0.50 MPa.Tailings consolidation emission can reduce geological hazard and environmental contamination induced by tailings dam. Preparation of consolidation agent and dehydrating process selection are the key technologies. Based on multi-factors orthogonal test, reasonable component of consolidation agent applied in Xishimen iron ore is selected; armed with XRD, SEM, cementing performance and hydration products are researched to determine the substitutability to cement. Conducted with three-phase industrial test, capacity of law about dehydration equipment is obtained. Disc vacuum filter which is adapted to 40;45% underflow of thickener has a high production and is not insensitive to concentration. Conducted with mercury injection test, micro-structure parameters, like the porosity and aperture, are measured to obtain the strength of test block indirectly. The value of strength is 0.78 MPa which exceed the needed 0.50 MPa.

关 键 词：固结剂 胶结性能 孔结构 陶瓷过滤机 衰减特性 

分 类 号：TD926[矿业工程—选矿]