电解金属锰渣制备泡沫混凝土实验研究

EXPERIMENTAL STUDY ON PREPARATION OF FOAM CONCRETE FROM ELECTROLYTIC MANGANESE RESIDUE

电解金属锰渣是锰矿石采用电解法生成电解金属锰时产生的浸出渣,其理化性质证实了其资源化利用的潜力。建立了电解金属锰渣-水泥-飞灰-细砂胶凝体系,经蒸压制备成超轻泡沫混凝土。主要探讨了水泥、石灰、石膏的添加对泡沫混凝土抗压强度的影响。结果显示,当凝结体系的配方为电解金属锰渣35.6%、水泥14.1%、细砂34.3%、石灰16.0%、石膏0.05%,在1.2MPa的蒸汽压下保养6h时的抗压强度最佳。中试实验生产出来的泡沫混凝土满足国家标准DBJ 50-055—2006中B07等级,可为电解金属锰渣资源化利用提供了一种创新的技术途径。

To reduce the hazard of electrolytic manganese residue to the environment and develope a new utilization way,an autoclaved process was employed to prepare foam concrete with electrolytic manganese residue,gelling agent（lime or cement）as the raw materials,based on analysis of electrolytic manganese residue characteristics. The influence of mix proportion of the gelling agents including lime and ordinary Portland cement（OPC） on strength of the foam concrete was investigated. The pilot test results showed that,with the optimal mixture proportion（electrolytic manganese residue of 35. 6%,OPC of 14. 1%,sand of 34. 3%,lime of 16. 0%. and gypsum of 0. 05%）,steaming for 6h with the pressure of 1. 2 MPa,the product foam concrete complied well with B07 grade of China national standard DBJ 50-055—2006.