矿物掺合料对焚烧飞灰胶凝活性及重金属固化的影响

焚烧飞灰是生活垃圾焚烧后烟气除尘器收下的物质 ,因其中含有能被水浸出的重金属而被认为是危险废物 ,必须对之进行稳定化处理。主要研究了焚烧飞灰的基本物理性质和胶凝活性 ,并将焚烧飞灰与目前常用的矿物掺合料复合 ,考察其复合效果及对重金属固化的影响。研究表明 ,矿物掺合料的掺入 ,不仅能提高固化体的强度 ,同时可以增强重金属的固化效果。

The fly ashes as the matter which come from scrubber after incinaration of municipal solid waste(MSWI)must be solidified/stabilized due to it may be contained water leachable heavy metals regarded as hazardous.In this article,the norˉmal physical characteristics and cementitious reactivity of the fly ashes are studied,the composite effect and the influence on heavy metals solidification are investigated by mixed the fly ashes with normal mineral admixture.Results show,the strength of the solidified body may be enhanced,and the solidification effect of the heavy metal may be reinforced by added with mineral admixture.