A method for preparing mine filling concrete by using wet grinding steel slag pulp

Abstract

The invention discloses a method for preparing mine filling concrete by using wet grinding steel slag pulp, and belongs to the technical field of energy-saving building materials. In the present invention, the wet grinding process and the filling material preparation process are connected into a system, and the steel slag blocks are subjected to multi-stage crushing and dry magnetic separation into steel slag tailings and steel slag iron fine powder; Calculate the ore feeding concentration of wet grinding steel slag and the weight percentage of steel slag slurry in the filling material according to the ratio of tailings to steel slag aggregate; wet grinding the steel slag tailings according to the calculated ore feeding concentration, and according to the calculated weight percentage of steel slag slurry in the filling material, The water consumption of the filling slurry was replaced by the water consumption of wet grinding, and ore powder and additives were added to the steel slag slurry according to the weight percentage of the steel slag slurry in the filling material, the ratio of the filling material to lime and the sand and the proportion of the additives in the ash, respectively, to obtain the steel slag fine bone. Material-based mine filling material. The invention saves water resources, is green and environmentally friendly, has safe and stable products and high performance, and provides a new way for a large amount of steel slag to be utilized.

Description

technical field [0001] The invention relates to the technical field of energy-saving building materials, in particular to a method for preparing mine filling concrete by using wet grinding steel slag pulp. Background technique [0002] The discharge of steel slag is about 10%-15% of the steel output. my country produces about 100 million tons of steel slag every year, but the comprehensive utilization rate is only about 30%. With the continuous growth of crude steel production in my country, a large amount of waste steel slag is piled up or landfilled year by year, occupying a lot of land, and metal ions are washed into the surface with rainwater, seriously polluting drinking water resources. In the process, dust pollution is formed in the surrounding atmosphere, which poses a severe test to the ecological environment and human health. [0003] Wet grinding steel slag technology has been applied in some domestic iron and steel enterprises. The steel slag is ground and washed...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned existing preparation method, which consumes a lot of water, causes water pollution, has many production processes, high energy consumption, does not consider the stability of steel slag, and has potential safety hazards, the present invention designs a method for preparing mines using wet-grinding steel slag slurry. The method of filling concrete, the steel slag wet grinding process is combined with the filling and mixing process, the wet grinding water is used for filling slurry water, and the steel slag is used as fine aggregate, which has the advantages of large steel slag treatment capacity, stability and safety, high strength of filling body, and super production of by-products. Fine steel slag powder and additives, saving and cleaning water resources, making full use of the beneficial components of wet grinding steel slag pulp, high efficiency and environmental protection, etc.

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