Desulfurized ash-based cementing material, and preparation method and application thereof

A technology of cementitious materials and desulfurization ash, which is applied in cement production, etc., can solve problems such as heavy metal and chloride ion erosion, high energy consumption in the production process, and unstable product performance, so as to achieve full mechanical activation, improve ball milling efficiency, and promote The effect of fast and efficient grinding

Pending Publication Date: 2021-06-15
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The resource utilization research of desulfurization ash in my country started relatively late. In recent years, the utilization of desulfurization ash by scientific researchers mainly focuses on partially replacing cement as a concrete admixture, producing autoclaved bricks, floor tiles and ot...

Method used

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  • Desulfurized ash-based cementing material, and preparation method and application thereof
  • Desulfurized ash-based cementing material, and preparation method and application thereof
  • Desulfurized ash-based cementing material, and preparation method and application thereof

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preparation example Construction

[0042] The preparation process of the novel desulfurization ash-based cementitious material of the present invention is as follows: first, the block fly ash is crushed to a particle size below 5 mm; then the fly ash, desulfurization ash, boiler ash, and S95 grade mineral powder are dried until the moisture content is not greater than 1%; the dried fly ash, desulfurization ash, boiler ash, S95 grade mineral powder and cement clinker, H 4000 The masterbatch surfactants are measured according to the mixing ratio, and the planetary ball mill is used to blend and mechanically activate at a speed of 250-350r / min for 30-35min. After passing through a 45μm square hole sieve, the sieve residue is not more than 10%. It can be obtained.

[0043] where H 4000 The preparation method of the masterbatch surfactant is as follows: mix desulfurized gypsum, sodium carbonate, sodium silicate, and sodium water reducer in proportion to prepare a solid mixture, and spray liquid triethanolamine and p...

Embodiment 1

[0045] The gelling material is proportioned according to the mass parts in Table 1, wherein H 4000 The ratio of masterbatch surfactant is 82 parts of desulfurized gypsum, 2 parts of naphthalene water reducer, 5 parts of sodium carbonate, 5 parts of sodium silicate, 3 parts of polymer polyol, and 3 parts of triethanolamine.

[0046] The materials are measured and ground to make cementitious materials. According to the "Cement Mortar Strength Test Method" (GB177-5), the cement mortar strength test is carried out, and the initial setting time and final setting time of each ratio are tested respectively. After standard curing Test its 3d, 28d, 120d compressive strength and flexural strength.

[0047] Table 1 Mixing ratio of desulfurization ash-based cementitious materials

[0048]

[0049] Table 2 Properties of desulfurization ash-based cementitious materials

[0050]

[0051]

Embodiment 2

[0053] (1) The cementitious material is proportioned according to the following mass parts: 15 parts of desulfurization ash, 56 parts of S95 grade mineral powder, 7 parts of fly ash, 4 parts of boiler ash, 15 parts of 42.5 cement clinker, H 4000 Masterbatch surfactant 3 parts. where H 4000 The ratio of masterbatch surfactant is 82 parts of desulfurized gypsum, 2 parts of naphthalene water reducer, 5 parts of sodium carbonate, 5 parts of sodium silicate, 3 parts of polymer polyol, and 3 parts of triethanolamine.

[0054] (2) Mix the cementitious material, desulfurized ash, stones, and stone powder in a certain proportion, put them into the cement mortar mixer in sequence, dry mix for 1 to 2 minutes, add additional water (calculated on a dry basis), and wet mix for 3 to 2 minutes. 5min, the mixture was obtained.

[0055] (3) Put the mixture into the mold of Φ10×5cm, mold it on the press and release the film. The molding pressure is 160KN. During the molding process, it should ...

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Abstract

The invention discloses a desulfurization ash-based cementing material, and a preparation method and application thereof. The desulfurization ash-based cementing material is mainly prepared by doping a certain amount of an H4000 surfactant into industrial waste residues such as desulfurization ash, S95-grade mineral powder, boiler ash, fly ash and the like at normal temperature and normal pressure. The preparation method solves the limitation of the existence of unstable sulfite in the desulfurized fly ash components on the materialization application of the desulfurized fly ash components, and has the advantages of simple process, wide raw material source, no addition of strong acid, strong alkali and other easily-corrosive reagents, low energy consumption and small secondary pollution. In addition, the desulfurized ash-based cementing material has the characteristics of high early strength, large softening coefficient, continuously increased later strength and the like, can be applied as a wall material and a road roadbed material, and has a wide prospect.

Description

technical field [0001] The invention relates to a novel gelling material prepared from desulfurization ash by a semi-dry method of a circulating fluidized bed, a preparation method and application thereof, and belongs to the technical field of solid waste recycling. Background technique [0002] Iron and steel enterprises will release a large amount of SO in the production process 2 . In 2019, my country's crude steel output was 996 million tons. According to the "per ton of steel produced, SO 2 Calculation of emission 1.95kg", SO 2 emissions up to 1.94×10 6 t, the desulfurization ash output produced by the circulating fluidized bed semi-dry flue gas desulfurization process will reach 4.85×10 6 t. At present, the disposal method of desulfurization ash is mainly stockpiling, which not only occupies a large amount of land resources, but also causes serious pollution to the environment. [0003] How to scientifically dispose and use high-value products to realize the harm...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/21C04B28/04
CPCC04B7/26C04B7/21C04B28/04C04B2111/0075C04B2201/50C04B14/02C04B14/06C04B18/062Y02P40/10
Inventor 邵雁游以文侯浩波彭伟郭华军姜明明聂海金刘子豪胡国峰
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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