矿渣-钢渣基胶结剂固化—稳定化含铅尾砂

摘要

为考察将含铅尾砂固化—稳定化后充填到地下水活动范围的方式含铅尾砂的可行性,以矿渣、钢渣等工业固体废弃物制成胶凝材料(冶金渣胶凝材料),考察其对铅离子的固化作用.结果表明,冶金渣固化体试样铅浸出浓度明显低于水泥固化体试样,冶金渣固铅试样28 d龄期抗压强度接近水泥固铅试样的2倍,且冶金渣固铅试样56 d龄期后铅浸出浓度和抗压强度保持稳定.XRD和IR分析结果表明,冶金渣净浆试样中不仅钙矾石含量高于水泥,而且硅氧四面体链接比水泥复杂,存在类沸石相结构,是冶金渣固铅性能好的原因.%In order to investigate the possibility of using solidification-stabilization technology treat lead tailings,using min-eral waste slag and steel slag as raw material to prepare binding material ( metallurgical slag binding material ) , solidification effects of metallurgical slag on lead ions was studied. Results indicated that,the leaching concentrations of metallurgical slag so-lidification were lower than the cement. The 28-day unconfined compressive strength of metallurgical slay sample were about twice to cement,and the 56-day unconfined compressive strength of metallurgical slag sample remained stable. X-ray diffraction (XRD) and Fourier Transform Infrared(FTIR) spectroscopy analysis results showed that,the microstructure of Ettringite and [SiO4]4- in metallurgical paste is more complex than cement,and exist zeolite phase structure,which is the reason for good lead solidification performance.