A method of using solid waste to melt glass at high temperature to make building materials

Abstract

The invention discloses a method for making building materials by using solid waste at high temperature to melt glass. The method comprises: water-quenching and cooling the magma in the solid waste high-temperature melting furnace, and then performing magnetic separation to separate metal impurities for subsequent use, and the obtained The water-quenched vitreous body is broken and screened, and the vitreous body is pressure-steamed and maintained at a certain temperature for a period of time to remove free alkaline metal oxides such as CaO and MgO in the vitreous body to solve the problem of the stability of the vitreous body. Finally, the matured vitreous body is dried and prepared Building materials fine aggregate. The method can effectively utilize the solid waste molten glass body to prepare building materials, opens up a new way for resource utilization of the molten glass body, and has significant economic and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of harmless and resourceful disposal of solid waste, in particular to a method for making building materials by using solid waste to melt glass at high temperature. Background technique [0002] A large amount of incineration fly ash and bottom slag will be produced in the process of garbage incineration, medical waste and industrial hazardous waste incineration. Fly ash contains a large amount of harmful substances such as heavy metals and dioxins. It is hazardous waste and must be disposed of in a harmless manner. The bottom residue of waste incineration accounts for about 20% to 35% of the original weight of the waste, and further volume reduction is required. At present, the plasma high-temperature melting treatment technology can completely destroy organic pollutants such as dioxins and furans in fly ash and incineration bottom slag, and turn fly ash and incineration bottom slag into vitreous slag for e...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method of using solid waste to melt glass at high temperature to make building materials, and at the same time solve the problem of free calcium oxide (f-CaO) and free magnesium oxide (f-MgO) contained in solid waste molten glass. For the problem of poor stability, use the method of rapid cooling water quenching and pressure steaming to reduce the content of free calcium oxide (f-CaO) and free magnesium oxide (f-MgO) in the fly ash molten glass body, and improve the stability of the glass body

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