Preparing method of microcrystalline foam glass

Abstract

The invention relates to a preparing method of microcrystalline foam glass, and belongs to the technical field of energy-saving building materials. Coal ash serves as the raw material for producing the microcrystalline foam glass, TiO2 in high-titanium blast furnace slag is sufficiently used as the nucleation agent, the nucleation speed of glass crystallization is reduced, and a large amount of tiny CaTi21O38 crystal nucleus is formed by well mixing and dissolving the glass; a foaming agent (calcium carbonate) is wrapped by a small amount of molten material to form a bubble cavity, when the foaming time is prolonged, the heat absorbed by calcium carbonate is increased, calcium carbonate starts to be decomposed to generate a large amount of gas, the temperature in the decomposition reactionof calcium carbonate is basically consistent with the softening temperature of the basic glass material, the viscosity of the glass material is reduced, the gas pressure in the bubble is increased, the gas wall starts to be thinned and the size of the bubble is increased when the gas pressure in the bubble is larger than the surface tension of the glass material so that a bubble with a certain diameter can be formed, and the microcrystalline foam glass of the stable porous structure is formed through cooling after the foaming process ends.

Description

technical field [0001] The invention relates to a method for preparing microcrystalline foamed glass, which belongs to the technical field of energy-saving building materials. Background technique [0002] In the process of industrial production, a large amount of solid waste such as fly ash, tailings, fuel waste, smelting waste, water treatment sludge and industrial dust has been produced, and its discharge is increasing at a rate of about 1.2 billion tons per year. Most of these waste residues are piled up in open-pit slag yards, or used in low-value areas such as road construction and backfilling gobs, and only a small part is used in the production of cement, wall bricks, silicate bricks, and aerated concrete. materials, and the type and amount of waste slag introduced are extremely limited (about 40%). The stockpiling of a large amount of fly ash and other industrial solid waste will inevitably occupy a large amount of land and generate waste residue maintenance costs....

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: the highest mass ratio of fly ash and other industrial slag in the whole material system can only reach about 40%, the content is very limited, and it is difficult to prepare a relatively small density, but the strength can meet the practical application The problem of foamed glass required, a preparation method of microcrystalline foamed glass is provided

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