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Method for preparing microporous sulphoaluminate type inorganic material by industrial waste residues

A sulfoaluminate type, inorganic material technology, applied in applications, ceramic products, household appliances, etc., can solve the problem of high calcination temperature

Inactive Publication Date: 2013-09-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw materials used, such as limestone and bauxite, are all natural non-metallic mineral resources, and the calcination temperature is relatively high.
The preparation of sulfoaluminate cement with fly ash, calcium carbide slag, desulfurized gypsum and other industrial waste ingredients is rarely seen in China.

Method used

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  • Method for preparing microporous sulphoaluminate type inorganic material by industrial waste residues
  • Method for preparing microporous sulphoaluminate type inorganic material by industrial waste residues

Examples

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Embodiment 1

[0029] The formula of sulfoaluminate alkalinity coefficient less than 0.75: fly ash is 23-26% of the total mass of raw materials, carbide slag is 53-58%, desulfurization gypsum is 8%, clay is 9%, red mud is 3%, Mineralizer is CaF 2 , and the quantity is 1% of the total mass of raw materials for preparing sulfoaluminate-type inorganic materials, and the specific formula is shown in Table 1.

[0030] Process conditions: the pre-calcination temperature is 400°C, and the preheating time is 15 minutes; the calcination temperature is 1250°C, and the holding time is 13 minutes.

[0031] Process flow: Weigh fly ash, calcium carbide slag, desulfurized gypsum, clay, red mud, and mineralizer according to the proportion, mix them evenly, and grind them until the sieve residue of 0.08mm square hole is less than 10%. The mass ratio of water is 5:1, adding water to form balls, drying, preheating, calcining and cooling to obtain granular products. Then check the apparent density, 1h water a...

Embodiment 2

[0036] The formula with a sulphoaluminate alkalinity coefficient of 0.97: fly ash is 23-26% of the total mass of raw materials for preparing sulphoaluminate-type cementitious materials, calcium carbide slag is 63-67%, and desulfurized gypsum is 6-13%. Mineralizer TiO 2 +CuO=1.5%, see Table 2 for the specific formula.

[0037] Process conditions: the pre-calcination temperature is 450°C, the preheating time is 10min, the calcination temperature is 1300°C, and the holding time is 15-20min.

[0038] Process flow: Weigh fly ash, calcium carbide slag, desulfurized gypsum, and mineralizer according to the proportion, mix the ingredients and make them evenly mixed, grind until the sieve residue of 0.08mm square hole is less than 10%, and the mass ratio of material to water is 5 : 1 adding water to form a ball, then drying, preheating, calcining and cooling to obtain a granular product. Then check the apparent density, 1h water absorption and porosity of the granular products. Crus...

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Abstract

A method for preparing microporous sulphoaluminate type inorganic material by industrial waste residues is disclosed. When the basicity coefficient of the sulphoaluminate is in a range from 0.70 to 0.97, main raw materials comprise, by weight, 20-30% of fly ash, 50-70% of acetylene sludge and 8-15% of desulfurized gypsum. The fly ash, the acetylene sludge, the desulfurized gypsum, clay, red mud, mineralizer and the like are weighed according to a ratio, then are burdened, levigated and mixed uniformly, and water is added after being mixed uniformly for balling, after being dried, the mixture is preheated and then is calcined, and a granular product is obtained after being cooled; and the granular product is broken into pieces and ground to obtain a product with a gelling property and of which the specific surface area is 300-350m<2> / kg. The preparation method provided by the invention employs industrial waste residues as the main raw materials, a few plastic materials and chemical admixtures are added, a microporous sulphoaluminate type inorganic gel material is obtained after burdening, homogenizing and low temperature calcining, and a microporous material having good gelling property and good thermal insulation performance is obtained after breaking and grinding.

Description

technical field [0001] The invention relates to a microporous sulphoaluminate inorganic material, in particular to a method for preparing the microporous sulphoaluminate inorganic material by using industrial waste residue. Background technique [0002] With the gradual shortage of resources in our country, the resources of various building materials are becoming more and more tense; at the same time, the production of building materials consumes a lot of resources and energy, which does not meet the national energy conservation and environmental protection requirements. It has become an urgent task to rationalize the application of resources, reduce energy consumption and increase economic benefits in enterprise production. [0003] While it is necessary to reduce resource and energy consumption, the annual discharge of industrial waste fly ash, carbide slag, and desulfurized gypsum is astonishing, and the current utilization rate is not high. Therefore, it is important for...

Claims

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Application Information

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IPC IPC(8): C04B38/00
Inventor 陈益兰徐伟
Owner GUANGXI UNIV
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