Method for preparing foam ceramic by using industrial and mining, building and sludge residue as raw materials

Abstract

The invention particularly relates to a method for preparing a foam ceramic by using industrial and mining, building and sludge residue as raw materials, and belongs to the technical field of environmental-protection foam ceramics, wherein protein foaming agent preparing, foam slurry preparing, molding and curing, high-temperature sintering, and detecting and packaging are performed to prepare thefoam ceramic. According to the present invention, the molded and cured foam slurry is conveyed to the tunnel kiln using liquefied petroleum gas as the fuel, and then enters the high temperature section through the sintering device, such that the two composite heating modes are innovatively connected in series so as to save the energy consumption or the fuel cost by 15-30%, and the technical problem that heavy metals, dioxins, and other organic pollutants cannot be completely removed during the combustion of industrial and mining, building and sludge residue is fundamentally solved; and the foam ceramic prepared through the method is the novel building material, and can have excellent performances of hydrophobicity, fire resistance, sound resistance, heat insulation, high compressive strength, acid resistance, alkali resistance, no aging, less deformation and the like according to the opened and closed gaps of the foam.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly foam ceramics, and in particular relates to a method for preparing foam ceramics by using industrial and mining, construction and sludge waste residues as raw materials. Background technique [0002] At present, my country is undergoing a process of rapid urbanization. Domestic urban construction produces more than 2.4 billion tons of solid waste every year, 200,000 to 300,000 tons of sewage sludge is generated every day, and the waste biomass of urban green plants is on the order of one million tons or more. Optimizing the utilization of urban waste is the direction of sustainable development in my country in the future. Less than 1% of the land area has to carry more than 54% of the population load and output about 84% of GDP. This kind of extensive urbanization will affect the healthy development of cities, resulting in the waste and exhaustion of urban resources. The existing inci...

AI Technical Summary

Problems solved by technology

Less than 1% of the land area has to carry more than 54% of the population load and output about 84% of GDP. This kind of extensive urbanization will affect the healthy development of cities, resulting in the waste and exhaustion of urban resources.

The existing incineration equipment disposes 270,000 tons per day, and the annual disposal fee is as high as 2.4 billion yuan. The use of incineration to generate electricity only solves some urban construction solid waste, and does not solve the problem of construction solid waste and sewage sludge at low cost and efficiently. , while sludge incineration power generation needs to dehydrate and squeeze the sludge to a water content of 67.7%, then the combustion will be in thermal equilibrium, so the cost of drying and burning remains high; and solid hazardous waste will contain secondary wastes such as heavy metals and dioxins. Pollution hazards, so further treatment is required to solve these pollution sources, so there is no fundamental solution to the problem. Only high-temperature melting and incineration technology can permanently solidify heavy metals, pyrolysis dioxins and other organic pollutants