钢渣-矿渣-氟石膏基胶结材固结铜尾矿性能

水泥作为传统尾矿固结材料造成尾矿充填成本居高不下，而钢渣和氟石膏等工业废渣利用率不高，因此采用其制备钢渣矿渣氟石膏基胶结材来替代水泥，需要对其固结尾矿性能进行研究。通过对不同时间尾矿固结浆体的泌水量及流动度、不同水化龄期抗压强度变化趋势研究，发现钢渣矿渣氟石膏基明显优于P·O 42．5级水泥和中国2种常用尾矿固结剂，其尾矿固结体浸出液3 d后的PH值均在9．0以下，远低于这3种高碱性尾矿固结材料，浸出液氟离子浓度极低，对环境影响小。S EM分析也显示掺钢渣矿渣氟石膏基胶结材的尾矿固结体具有较为密实的微观结构。

Properties of Cemented Copper Tailings Backfill with Steel Slag-Blast Furnace Slag-Fluorgypsum-Based Cementation Material

Cement is a traditional tailings cementation material ,w hich causing the high tailings backfill cost . However ,the utilization rate of industrial waste residue ,such as steel slag and fluorgypsum ,is low .So the steel slag-blast furnace slag-fluorgypsum-based cementation materials preparation with industrial waste residue substitutes for cement . As a result , its cementation tailings performances must be studied . According to mortar fluidity and bleeding quantity of tailing cementation slurry at different time and compressive strength change trend at different hydration ages ,the performance of steel slag-blast furnace slag-fluorgypsum-based cementation materials is significantly better than P · O42 .5 grade cement and two kinds of commonly used cementation agents in China .After soaking for three days ,the pH value of these tailings solidification bodies leaching liquid is less than 9 .0 ,which is much lower than the pH values of three kinds of high alkaline tailings cementation materials mentioned before .Leaching liquid fluorine ion concentration is extremely low . With less impact on environment . SEM analysis also show that these tailings solidification bodies mixing with the steel slag-blast furnace slag-fluorgypsum-based cementation materials have relatively dense microstructure .