Method for preparing lightweight energy-saving wall material from high-content semi-dry sintering desulfurized fly ash

Abstract

The invention relates to a method for preparing a light energy-saving wall material from high-content semi-dry sintering desulfurized fly ash, which abandons the conventional route that the existing semi-dry sintering desulfurized fly ash resource recycling generally needs oxidation process phase change pretreatment, and finds another way to directly mix the desulfurized fly ash with other raw materials for pouring molding. The preparation method comprises the following steps: firstly, uniformly mixing 30-40 parts of semi-dry sintering desulfurization ash, 10-20 parts of clinker powder or cement, less than or equal to 10 parts of lime powder and 30-50 parts of fly ash, then sequentially adding less than or equal to 2% of reinforced fibers, 0.03-0.05% of foaming slurry, 0.6-1.0% of a water reducing agent and 0.04-0.06% of an exciting agent which are equivalent to the mixed materials, uniformly stirring, and casting and molding, and finally, curing to obtain the qualified light energy-saving wall material. According to the method, the solid waste utilization rate can reach 80%, the doping amount of the semi-dry sintering desulfurized fly ash reaches up to 40%, the semi-dry sintering desulfurized fly ash does not need to be subjected to any pretreatment in advance, and the method has the advantages of being simple in process, high in product additional value and the like.

Description

technical field [0001] The invention relates to the technical field of reutilization of desulfurized ash solid waste resources and building materials, in particular to a method for preparing light-weight energy-saving wall materials by sintering desulfurized ash in a high-volume semi-dry method. Background technique [0002] Sulfur dioxide in the iron and steel industry is mainly produced by flue gas from sintering pellets, and the sintering process is a major emitter of waste gas pollutants in the iron and steel industry. The sulfur dioxide produced by the flue gas of sintering pellets accounts for more than 70% of the total emissions of iron and steel enterprises, and some enterprises even reach about 90%. Sintering flue gas desulfurization technology is divided into dry method, semi-dry method and wet method, among which the dry method has low efficiency, and the wet method has corrosion and aerosol problems. In comparison, the semi-dry method can better avoid the above ...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the common problems in the comprehensive utilization process of the existing semi-dry method of sintering desulfurization ash, such as the need for additional pretreatment, complex process, small dosage, and few utilization channels, and provide a high-dosage semi-dry method of sintering desulfurization A method for preparing a lightweight energy-saving wall material from ash, the method comprising the following steps: (a) uniformly mixing semi-dry sintered desulfurization ash, clinker powder or cement, lime powder, and fly ash to obtain an inorganic solid raw material; (b) Add reinforcing fiber, foaming slurry, water reducer, and activator to the inorganic solid raw material and stir evenly to obtain a castable; (c) use the castable to cast and form, and obtain a lightweight energy-saving wall material after curing

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