矿井污泥一步固化法制轻质建材的技术研究

Study of Mine Sludge Step Solidification of Light Construction Materials

一步固化及加气发泡法是矿井污泥无害化、资源化处理最有效的方法。选取水泥、粉煤灰(煤渣)、河砂、石灰(石膏)、发气物料作为固化加气发泡处理剂,运用正交试验研究了矿井污泥实验条件;并通过抗压强度来评价污泥固化块(轻质建材块)的力学性质;采用XRD和SEM分析污泥固化块(轻质建材块)的组成和微观结构。结果表明,水泥、粉煤灰(煤渣)、河砂、石灰(石膏)的掺比量一定时对污泥固化块(轻质建材块)的抗压强度具有有利影响。该配比的污泥固化块(轻质建材块)对矿井污泥有很好的固化效果。

Curing in one step and aerated foaming are the most effective treatment ways to make mine sludge harmless and useful.Choosing cement,fly ash（cinder）,river sand,lime（gypsum）,gas releasing materials as the aerated foaming additives in curing,have researched experimental conditions in treatment of the mine sludge by orthogonal methods,and evaluating the mechanical properties of the sludge solidifying blocks（lightweight building materials）,by the test of compressive strength then analyzing the composition and microstructure of mud-curing blocks（light building blocks） with XRD and SEM.Results show that the compressive strength of the cured blocks（lightweight building blocks） could be enhanced when the proportion of cement,fly ash（cinder）,river sand,lime（gypsum） fly is at certain level.This composition has very good curing effect on mine sludge.