钢渣体积稳定性处理及应用研究  

Processing of Volume Stability for Steel Slag and Its Application

作　　者：肖文斌[1] 李兰兰[1] 赵风清[1,2] 

机构地区：[1]河北科技大学,河北石家庄050018 [2]河北省固体废弃物工程技术研究中心,河北石家庄050018

出　　处：《环境科学与技术》2015年第12期194-198,共5页Environmental Science & Technology

基　　金：国家"863"重点课题资助(2007AA061702)

摘　　要：钢渣是一种大宗工业废弃物,由于存在体积稳定性不良的缺点,利用率一直较低。该文利用复合激发（物理激发和化学激发）技术,发挥各材料在蒸压条件下水化硬化过程中的协同作用,优化原料配比,提高钢渣体积稳定性。结果表明：多聚磷酸盐、Na_2CO_3、CO_3＋NaOH、CO_3＋NaAlO_2、NaHCO_3＋NaOH、SiO_3·9H_2O＋NaOH等在掺杂量为1%~2%时,均能提高钢渣的体积稳定性,以多聚磷酸盐为最佳。以处理后的磨细钢渣为原料可用于蒸压尾矿砖的生产,钢渣掺量从原来的11%提高到30%,水泥用量由原来的7%下降到5%,产品抗压强度达到12 MPa以上。为钢渣的高效处置和资源化利用提供了一条有效途径。Steel slag is a major industrial waste. Because of poor volume stability, its utilization has been limited.Compound activation（physical and chemical）technology is used,and the synergetic effects are exerted in the hydration and hardening process to increase the volume stability of steel slag. Results show that polyphosphate,CO_3 and the mixtures like CO_3＋NaOH,CO_3＋NaAlO_2,NaHCO_3＋NaOH, SiO_3·9H_2O＋NaOH can all make the steel slag system stable at the dosage of 1% ~2% and polyphosphate behaves best. Grounded steel slag was used for autoclaved brick of tailings,in which the mass ratio of steel slag increased from 11% to 30%,the ratio of cement reduced from 7% to 5%. The compressive strength of the product is over 12 MPa,and can be used for construction and building material,which would provide an effective approach for the treatment and utilization of steel slag.

关 键 词：钢渣 稳定性 尾矿 蒸压砖 激发剂 

分 类 号：X705[环境科学与工程—环境工程]