METHOD FOR PREPARING MINE FILLING MATERIAL USING HEAVY METAL TAILINGS CEMENTED BY SOLID WASTES IN STEEL INDUSTRY

摘要

A method for preparing a mine filling material using heavy metal tailings cemented by solid wastes in steel industry, comprising the following steps: S1, using steel slag, desulfurization ash, and slag as a gel material, adding an alkali activator and an activating agent to the gel material, and performing uniform stirring to prepare a cementing agent; S2, adding a dispersing agent, a binder, and a heavy metal curing agent to the heavy metal tailings, and performing uniform stirring; and S3, uniformly stirring and mixing the cementing agent of S1 and the heavy metal tailings of S2 in a certain ratio to prepare the mine filling material. The heavy metal tailings cemented by the solid wastes in the steel industry are used as the mine filling material instead of cement-consolidated tailings, thereby reducing mine filling costs, increasing the comprehensive utilization amount of the bulk solid wastes of the steel slag, the desulfurization ash, and the tailings, and improving the mechanical strength of a mine filling body.