Preparation method and product of pulverized fuel ash desulfurized gypsum rock wool

Abstract

The invention discloses a preparation method and a product of pulverized fuel ash desulfurized gypsum rock wool. The rock wool is prepared from the following formula materials: 49% to 52% of pulverized fuel ash, 48% to 50% of desulfurized gypsum and 3% to 5% of waste glass, wherein the pulverized fuel ash is wet discharged ash with the natural water content of 12% to 18%; and the desulfurized gypsum has the natural water content of 10% to 13%. The preparation method comprises the following steps: weighing the materials according to proportions of the material formula; storing the pulverized fuel ash, the desulfurized gypsum and the smashed waste glass in a silo and carrying out mechanical agitation so as to obtain a dried mixed material; carrying out aging, roll grinding and briquetting on the dried mixed material and then naturally hardening so as to form lump materials; adding the hardened lump materials and coke into a cupola furnace according to the weight ratio of the coke to the lump materials being 1 to 4, blowing hot air into the cupola furnace so as to melt the mixed material to form a silicate solution, and throwing the silicate solution in a centrifuge so as to obtain fibrous materials; and feeding the fibrous materials into a settling chamber by virtue of high-pressure air, and delivering the fibrous materials by virtue of a net conveyor so as to form the pulverized fuel ash desulfurized gypsum rock wool. According to the method, the thermal insulation efficiency of the prepared rock wool reaches 97%, so that the utilization rate of the pulverized fuel ash and the desulfurized gypsum is improved.

Description

Technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing fly ash desulfurized gypsum rock wool and its products. Background technique [0002] The thermal power industry is guided by the ideological guidance of short-distance coal transportation and long-distance power transmission. Large-scale power generation is relatively concentrated in coal production bases. The agglomeration of the power industry and the comprehensive utilization of fly ash desulfurized gypsum not only cause environmental problems, but also involve electricity Sustainable development of industry. At present, the utilization of fly ash desulfurization gypsum is mainly concentrated in the field of building materials. The use of fly ash is mainly based on standard bricks, blocks, and cement. The market radius is small and the utilization is very limited. Desulfurized gypsum is mainly used in wall coatings. Because desulfurized gypsum is unstable,...

AI Technical Summary

Problems solved by technology

How to improve the comprehensive utilization rate of fly ash and by-product desulfurization gypsum to deal with thermal power generation waste and solve the problems of power industry pollution and other issues