Method for manufacturing carbonized baking-free brick by using dry ice

Abstract

The invention discloses a method for manufacturing a carbonized baking-free brick by using dry ice. The method comprises the following five steps: S1, raw material treatment; S2, material mixing; S3, dry ice mixing; sequential connection of all the steps and automatic conveying of the molds are achieved through the conveying belt and the induction door; according to the baking-free brick, solid waste is used as a raw material, environment-friendly magnesium oxide and CO2 are used as main cementing materials, accurate metering of all components is achieved through a metering valve, reutilization of the solid waste is promoted, and the baking-free brick has remarkable low-carbon and environment-friendly effects; cO2 gas is firstly converted into dry ice, the dry ice is added into a mixture according to the CO2 amount needed by brick carbonization, and the stability of the dry ice in the mixing process is met by specially arranging a low-temperature bin; by compacting and laminating, dry ice is prevented from sublimating and escaping, efficient absorption of CO2 dry ice and accurate control over carbonization reaction are achieved, the whole process is free of secondary pollution, only several hours are needed from material preparation to brick manufacturing, and the brick further has the advantages of being high in strength and low in cost.

Description

technical field [0001] The invention belongs to the field of civil engineering building materials production, and in particular relates to a method for producing carbonized non-burning bricks by using dry ice. Background technique [0002] With the rapid development of economic construction, the civil engineering construction industry has also developed rapidly. Brick is one of the main materials for infrastructure construction at present, including fired clay bricks, autoclaved silicate bricks and concrete hollow block bricks. Since clay bricks destroy a large amount of arable land resources, there are serious resource consumption and carbon emissions. Compared with clay bricks, although autoclaved silicate bricks and concrete hollow blocks have less damage to land resources, these new building bricks generally have defects such as large shrinkage and high water absorption, and more or less cementitious materials are used. to Portland cement. Cement cured bricks require a...

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Problems solved by technology

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention aims to propose an economical, efficient and precise utilization of CO 2 , Low-carbon and sustainable method of using dry ice to make carbonized unburned bricks to solve the defects of long maintenance period, low strength, poor durability, and easy secondary environmental pollution in the existing brick-making technology, and at the same time realize construction solid waste, Resource reuse of industrial solid waste, aeolian sand and greenhouse gas in the production of building material bricks

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