碱矿渣水泥固结铬渣废弃物效果初探

Effecting Discussion on Alkali Slag Cement Solidification with Chromic Residue

通过等量取代碱矿渣水泥中矿渣组分与普通硅酸盐水泥中的水泥对比试验研究,探讨了采用碱矿渣水泥固结铬渣废弃物的技术优势。试验表明,当取代量为30%时,碱矿渣水泥28d固结铬渣后的Cr6+表面浸出率为0,普通硅酸盐水泥28d固结铬渣后的Cr6+表面浸出率为3.00×10-5g/cm2·d,说明碱矿渣水泥水化28d后对铬渣的固结效率远大于普通硅酸盐水泥固结效率,且用碱矿渣水泥固结铬渣废弃物的临界取代掺量可达50%。

By comparing the test results from equivalent replacement of the slag in AASC or the cement of ordinary Portland cement （OPC） with chromium slag, the advantages of AASC solidified body with the chromic residue are dis-cussed. The results indicate that when the replacement rate of chromium slag is 30%, the surface leaching rate of Cr^6＋ in the kind of AASC solidified body of is 0, whereas the surface leaching rate of Cr^6＋ in the OPC solidified body with the chromium slag is 3.00×10^-5 g/cm^2·d after 28d hydration, which shows that the solidification efficiency of the AASC solidi-fied body on chromium slag after 28d hydration is far better than that of the OPC solidified body, and the critical replace-ment rate of chromium slag can reach up to 50%.