A kind of high-silicon iron tailings foam glass-ceramics and its production method

Abstract

The invention relates to foam microcrystalline glass produced by using high-silicon iron tailings and a production method of the foam microcrystalline glass. Main raw materials of the foam microcrystalline glass comprise 70%-90% of the high-silicon iron tailings, 0.5%-5% of a foaming agent and 5%-30% of an additive, wherein the foaming agent is obtained by mixing carbon powder and calcium carbonate in a mass ratio being 2:1; the additive is obtained by mixing albite and talc in the ratio being 5: (0.5-1). During production, the raw materials are uniformly mixed, and the foam microcrystalline glass is prepared through preheating, sintering, foaming, crystallizing and annealing processes after forming. The foam microcrystalline glass has the advantages of small density, small heat conductivity coefficient, high compressive strength, easiness in processing and forming and the like and can be used for buildings such as a villa, a civic building, an industrial factory building and the like. The problems of high raw material production cost, complicated technology and the like of the foam microcrystalline glass are solved, pollution hazard of tailing accumulation to the environment is avoided, waste is turned into wealth, and energy saving and environmental protection are realized.

Description

technical field [0001] The invention belongs to the technical field of building and engineering heat preservation and heat insulation materials, and relates to a foamed glass-ceramic produced by using high-silicon iron tailings and a production method thereof. Background technique [0002] At present, all kinds of tailings have become one of the bulk solid wastes with the largest output and the lowest comprehensive utilization rate in my country. The cumulative stockpiles exceed 10 billion tons, and the annual output exceeds 1 billion tons, of which iron tailings account for all tailings. Nearly 1 / 3 of the ore stockpile. The comprehensive utilization rate of other bulk solid waste in my country, such as coal gangue and fly ash, exceeds 50%, while the comprehensive utilization rate of tailings is less than 20%, and the development and utilization of iron tailings are mainly concentrated in the production of cement products, In terms of road filling and iron element recycling, ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high cost and complex process of the foamed glass-ceramics produced in the prior art, the present invention provides a foamed glass-ceramic with solid waste high-silicon iron tailings as the main raw material and a simplified process and a production method thereof. The product has the advantages of low density, small thermal conductivity, high compressive strength, easy processing and molding, etc.

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