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 mineral 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 solidification 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[SiO_4]^（4-） in metallurgical paste is more complex than cement,and exist zeolite phase structure,which is the reason for good lead solidification performance.
出处
《金属矿山》
CAS
北大核心
2016年第8期180-184,共5页
Metal Mine
关键词
矿渣
钢渣
重金属
铅尾砂
胶结充填
Mineral waste slag
Steel slag
Heavy metal
Lead tailing
Paste backfilling
