高掺量钢渣无熟料体系制备全尾砂胶结充填料

Preparation of Whole-tailings Paste Backfilling Material with High Steel Slag Content and None Clinker Aggregate

以钢渣和尾砂为主要充填材料,综合分析料浆流动性能和胶结充填体强度,确定胶结充填料的优化配比,并通过X射线衍射(XRD)和扫描电镜(SEM)微观分析观察其微观结构和水化产物。试验结果表明,当钢渣掺量为63%、脱硫石膏掺量为12%、矿渣掺量为25%时,料浆流动性能满足自流型胶结充填的流动性要求,充填体28 d抗压强度为3.73 MPa,满足矿山充填强度要求。

Using steel slag and tailings as the main filling material,this paper determined the optimized ingredient of the backfilling materials by analyzing the strength characteristics and mortar fluidity. X-ray diffraction analysis （XRD） and scanning electron microscopy （SEM） were used to observe microstrueture and hydration products. The experiments result indicated that mortar fluidity can of artesian cemented filling and the 28 d compressive strength is 3.73 MPa which can satisfy the requirement of compressive strength for mine filling when the content of steel slag, desulphogypsum, and slag is 63% . 12% . and 25%.