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Preparation method of sulfoaluminate Belite cement

The technology of Belite sulfoaluminate and special sulfoaluminate is applied in the field of preparation of Belite sulfoaluminate cement, which can solve the problems of high energy consumption, environment and the like, achieve low energy consumption, low calcination temperature, The effect of solving environmental problems

Active Publication Date: 2015-11-18
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the low-temperature preparation of Belite sulfoaluminate cement of the present invention solves the environmental problems caused by high energy consumption and accumulation of industrial waste slag in the existing cement production process

Method used

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  • Preparation method of sulfoaluminate Belite cement
  • Preparation method of sulfoaluminate Belite cement
  • Preparation method of sulfoaluminate Belite cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The ratio of raw materials and water consumption designed in this embodiment are as shown in Table 2.

[0020] Table 2 Embodiment 1 raw material ratio and water consumption

[0021] Example 1

Calcium-enriched liquid slag

Carbide slag

Desulfurization gypsum

Bauxite

water

Mass / g

235

394

341

30

373

[0022] The specific implementation steps are as follows:

[0023] 1) Mixing: Weigh the raw materials according to the proportion and put them in the planetary mill, add water, grind for 2 hours, take out and pour the slurry into the mold, demould after molding, and obtain a block sample;

[0024] 2) Hydrothermal synthesis: put the above sample in a digital display constant temperature stirring circulation curing box that has been heated to a set temperature of 60°C, take it out and cool it after constant temperature curing for 10 hours;

[0025] 3) Calcination: After the cooled block sample is crushed, it is pla...

Embodiment 2

[0030] The ratio of raw materials and water consumption designed in this embodiment are as shown in Table 4.

[0031] Table 4 embodiment 2 raw material ratio and water consumption

[0032] Example 2

Calcium-enriched liquid slag

Carbide slag

Phosphogypsum

Bauxite

water

Mass / g

161

364

416

59

363

[0033] The specific implementation steps are as follows:

[0034] 1) Mixing: Weigh the raw materials according to the proportion and place them in a planetary mill, add water, grind for 5 hours, take out and pour the slurry into the mold, demould after molding, and obtain a block sample;

[0035] 2) Hydrothermal synthesis: put the above sample in a digital display constant temperature stirring circulation curing box that has been heated to a set temperature of 90°C, take it out and cool it after constant temperature curing for 6 hours;

[0036] 3) Calcination: After the cooled block sample is crushed, it is placed in a h...

Embodiment 3

[0041] The ratio of raw materials and water consumption designed in this embodiment are as shown in Table 6.

[0042] Table 6 embodiment 3 raw material ratio and water consumption

[0043] Example 3

coal gangue

Carbide slag

Desulfurization gypsum

Tailings bauxite

water

Mass / g

95

392

376

137

329

[0044] The specific implementation steps are as follows:

[0045] 1) Mixing: Weigh the raw materials according to the proportion and put them in the planetary mill, add water, grind for 7 hours, take out and pour the slurry into the mold, demould after molding, and obtain a block sample;

[0046] 2) Hydrothermal synthesis: Place the above sample in an autoclave that has been heated to a set temperature of 115°C, and take it out to cool after constant temperature curing for 4.5 hours;

[0047] 3) Calcination: After the cooled block sample is crushed, it is placed in a high-temperature furnace, calcined at 960°C for 70 mi...

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Abstract

The invention discloses a preparation method of sulfoaluminate Belite cement. The preparation method comprises the following steps: taking industrial waste residues and industrial gypsum as raw materials, taking bauxite or bauxite tailings as a corrective material, adding water for grinding after mixing, molding, carrying out hydrothermal reaction, and then, smashing, calcining and grinding, so as to obtain sulfoaluminate Belite cement, wherein the main components of the sulfoaluminate Belite cement are C4A3S<-> and beta-C2S. According to the invention, the sintering temperature of the sulfoaluminate Belite cement is reduced through the hydrothermal reaction performed in advance, the energy consumption is reduced, the performance of the sulfoaluminate Belite cement is improved through a proper ratio and a proper technology, and the fact that the low-carbon sulfoaluminate Belite cement is prepared under low temperature; besides, limestone is not used, the generation of carbon dioxide is avoided, the environmental pressure is increased, and the energy consumption is low due to low calcination temperature; therefore, the preparation method of the sulfoaluminate Belite cement is low-carbon and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of cement and its preparation, in particular to a preparation method of Belite sulphoaluminate cement. Background technique [0002] Today's world is developing rapidly. While people's material life is being improved, people are more and more concerned about the earth on which we live. As the most widely used building material - cement, it plays an important role in the progress of human society and social and economic development. , also produces high energy and resource consumption and greenhouse gas emissions. Usually, ordinary Portland cement has a calcium oxide content of about 66%, which accounts for 50-70% of alite minerals in clinker, that is, tricalcium silicate. The formation temperature is about 1450°C. The mineral contains calcium oxide up to 73.7%, CaCO 3 Decomposition energy consumption accounts for about 46% of the theoretical heat consumption of clinker, resulting in high energy consumption...

Claims

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Application Information

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IPC IPC(8): C04B7/32
CPCY02P40/10
Inventor 郭伟王春
Owner YANCHENG INST OF TECH
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