Phosphogypsum composite autoclaved brick and preparation method thereof

Abstract

The invention discloses a phosphogypsum composite autoclaved brick, and the formula of a green body (content by weight) contains 60%-85% of phosphogypsum, 10%-20% of construction garbage and 1%-8% of additive. The construction garbage is one or mixture of broken red bricks, waste concrete, waste ceramic tiles and waste glass, and the additive is mixed material of a plurality of groups of raw materials of sodium citrate, methyl cellulose, FDN, and quick lime. The invention further discloses a preparation method of the phosphogypsum composite autoclaved brick, which comprises the procedures of breaking, ball milling, material preparing, stirring, aging, wheel grinding, pressing, autoclaving and the like. The composite autoclaved brick has the advantages of high utilization rate of the solid waste residue-phosphogypsum and the construction garbage, large utilization amount, simple production process, low cost, economy and environmental protection, and the brick body can meet therequirements of national standards on bearing materials of wall bodies. The content of solid wastes of the phosphogypsum, the construction garbage and the like in the formula is as high as 95%, thereby changing wastes into treasures and belonging to a novel environment-friendly construction material.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial waste residues, and specifically relates to the production of building material products using industrial solid waste residues phosphogypsum and construction waste as main raw materials, in particular to a phosphogypsum composite autoclaved brick and a preparation method thereof. Background technique [0002] Protecting land resources is an important basic national policy of our country. The per capita arable land area in our country is less than 2 / 5 of the world average, and the per capita arable land area is 0.09 hectares. However, the traditional clay brick production will consume a lot of precious land resources and intensify the impact on the ecological environment. Environmental pressure, and seriously affect the sustainable development of the economy and society. Therefore, by eliminating clay bricks, developing new wall materials, and making full use of industria...

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the above-mentioned defects in the prior art, and its purpose is to provide a phosphogypsum solution to solve the problems of environmental pollution and land occupation caused by the solid waste residue phosphogypsum produced when sulfuric acid is used to treat phosphate rock and a large amount of construction waste. Composite autoclaved brick, which has the advantages of high utilization rate of solid waste phosphogypsum and construction waste, large utilization, simple production process, low cost, economical and environmental protection

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