利用四川某铜矿尾矿制作轻质免烧砖的工艺研究  

Research on techniques of lightweight baking-free brick made of copper mine tailings from Sichuan

作　　者：冯启明[1] 王维清[1] 张博廉[1] 黄阳[1] 

机构地区：[1]固体废弃物处理与资源化教育部重点实验室,四川绵阳621010

出　　处：《中国矿业》2010年第12期90-92,95,共4页China Mining Magazine

基　　金：固体废弃物处理与资源化教育部重点实验室培育基金项目(08zxgp06)

摘　　要：对四川某铜矿选别尾矿的化学成分、矿物成分及相对含量、粒度及其分布进行测试分析表明,该尾矿的矿物成分主要是石英、钠长石,粒度集中分布在40～140目。以该尾矿作骨料,适量水泥作胶结料,石灰作激发剂,分别加入混凝土发泡剂和废弃聚苯泡沫粒作预孔剂,通过浇注和捣打成型、养护等工艺制备了轻质免烧砖。研究了不同原料配比和养护条件下制品密度和抗压强度等性能。当尾矿用量达70～80%时,制品干燥容重仅为页岩实心砖的1/2～2/3,抗压强度达到3.6～10.4MPa,适用于建筑物承重和非承重填充砌块,属低能耗环保型墙体材料。The chemical composition,mineral composition and particle size distribution of copper mine tailings from Sichuan province were analyzed,the results show that mainly mineral compositions are quartz and albite,and the particle size distribution concentrate from 40 meshes to 140 meshes.The preparation technology of lightweight baking-free brick was teeming,ramming and ramming in turn using the copper mine tailings as aggregate,appropriate amount of cement as binder,lime as activator,concrete foaming agent and waste polystyrene foam particles as pre-hole agent,respectively.And the density and compressive strength of the lightweight baking-free brick prepared by different ratio of raw material and curing condition were measured.The results show the dry bulk density of lightweight baking-free brick was only as much as 1/2 to 2/3 of solid shale brick,but the compressive strength is up to 3.6-10.4 MPa when the mass percent of copper mine tailings is 70% to 80%.And the results also show the lightweight baking-free brick is applicable to used as load or non-load bearing fill-up block masonry,and also is a kind of low power and environmentally friendly walling material.

关 键 词：铜矿尾矿 轻质免烧砖 

分 类 号：TD982[矿业工程—选矿]