Non-calcined desulfurized gypsum building block and preparation method thereof

Abstract

The invention relates to a non-calcined desulfurized gypsum building block and a preparation method thereof. The non-calcined desulfurized gypsum building block is prepared from the following ingredients according to parts by weight: 36-40 parts of coal ash, 36-40 parts of desulfurized gypsum dihydrate, 2-4 parts of quick lime, 1-3 parts of ground slag, 9-11 parts of silicate cement, 5-7 parts ofvitrified microbeads, 0.1-0.2 part of water reducer, 1-3 parts of stearic acid-polystyrene emulsion waterproof agent, 0.6-1.0 part of compound activator and 0.04-0.06 part of polyethylene fiber, wherein the ratio of all ingredients to water is 100:37. Compared with the prior art, the non-calcined desulfurized gypsum building block has the advantages that the whole production process of the building block does not need to calcine desulfurized gypsum dihydrate into semihydrated gypsum and does not need to adopt high-pressure or high-temperature curing technology. More energy is saved in the production process, and investment cost and production cost are saved.

Description

technical field [0001] The invention relates to a non-calcined desulfurized gypsum block and a preparation method thereof. Background technique [0002] The method for producing gypsum blocks in the prior art mainly uses calcined plaster of paris, ie hemihydrate gypsum, as the main raw material. However, converting chemical gypsum (such as phosphogypsum, desulfurized gypsum, etc.) in various industrial wastes into plaster of paris by calcination requires more heat or energy, which does not meet the strategic requirements of low-carbon and energy-saving. And this production process also has following obvious shortcoming: [0003] (1) During the calcination process, a large amount of dust will be generated, which will seriously pollute the environment. If it is to be avoided, it needs to be equipped with huge dust removal equipment, which occupies a large area and requires a large investment; [0004] (2) Due to the need for dehydration and drying, expensive dehydration and ...

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Problems solved by technology

[0003] (1) During the calcination process, a large amount of dust will be generated, which will seriously pollute the environment. If it is to be avoided, it needs to be equipped with huge dust removal equipment, which occupies a large area and requires a large investment;

[0004] (2) Due to the need for dehydration and drying, expensive dehydration and drying equipment is required

[0005] In addition, although there have been desulfurized gypsum wall blocks produced without calcination, excessive use of cement

We know that cement production is also an industry with high energy consumption and environmental pollution, so excessive use of cement does not meet the requirements of sustainable development

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