利用煤矸石和矿山剥离粘土生产低碱水泥的实践

Practice of Producing Low Alkali Cement with Coal Gangue and Mine Stripping Clay

分析了煤矸石和矿山剥离粘土的化学成分。采用煤矸石和矿山剥离粘土作硅铝质校正材料进行了生料配料及易烧性试验,确定了生产低碱水泥的配料方案。生产的熟料碱含量稳定在0.4%左右,生产的低碱水泥碱含量稳定在0.5%左右,水泥混合材掺加量提高至16%左右,既利用了废渣,又解决了矿山剥离粘土堆放的难题。

The chemical composition of coal gangue and clay stripped from mine was analyzed.The coal gangue and clay stripped from mine were used as silica-alumina correction materials for raw meal proportioning and burnability test,and the proportioning scheme for producing low alkali cement was determined.The alkali content of clinker produced is stable at about 0.4%,the alkali content of low-alkali cement produced is stable at about 0.5%,and the addition amount of cement mixture is increased to about 16%,which not only utilizes waste residue,but also solves the problem of stacking stripped clay in mines.