钢渣-矿渣-沸石胶结剂的开发及应用

基于活性激发和不同废渣的协同作用制备一种低成本胶凝材料——钢渣-矿渣-沸石(SBZ)胶结剂。通过响应面优化试验确定基础物料配比为:钢渣38.14%,矿渣38.14%,沸石10%,改性脱硫石膏10%,复合激发剂3.72%。在此基础上,外掺8%的多晶硅渣,物料比表面积为420 m2/kg,产品28天抗折强度达到6.3 MPa,抗压强度达到42.2 MPa。SBZ胶结剂能够有效固化重金属铅(Pb2+)和铬(Cr6+),与普通硅酸盐水泥相比,固化效果好,成本较低,具有良好的应用前景。体系中的水化硅酸钙、水化铝酸钙、钙矾石以及沸石类物质对重金属的固化具有重要贡献。

Development and application of binder of steel slag,blast furnace slag and zeolite

A low-cost cementing material, steel slag-blast furnace slag-zeolite binder(SBZ), was prepared based on the synergistic action of activation and different waste slag. The basis material ratio was determined by response surface optimization test, which was the steel slag of 38.14%, granulated blast-furnace slag of 38.14%, zeolite of 10%, modified gypsum of 10%, and composite activator of 3.72%. On this basis, the polysilicon waste with the dosage of 8% was used, and the specific surface area of the binder was 420 m2/kg, the 28 d flexural strength reached 6.3 MPa, and the compressive strength reached 42.2 MPa. The SBZ cementitious materials can effectively cure heavy metal lead (Pb2+) and chromium (Cr6+). Compared with ordinary Portland cement, it had higher immobilization efficiency, lower cost and good application prospects. The hydrated calcium silicate, hydrated calcium aluminate, ettringite and zeolite materials in the system had an important contribution to the solidification of heavy metals.