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Sulphoaluminate cement clinker and preparation method thereof

A technology for sulfoaluminate cement and clinker, applied in the field of sulfoaluminate cement clinker, can solve problems such as the waste of aluminum resources and the environment, and achieve the effects of superior coagulation performance, readily available raw materials and simple operation.

Inactive Publication Date: 2021-01-08
DENGDIAN GROUP CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum ash is usually dumped as waste residue, which not only causes waste of aluminum resources but also brings environmental problems
[0004] At present, there is no sulphoaluminate cement clinker using aluminum ash as raw material on the market.

Method used

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  • Sulphoaluminate cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of sulphoaluminate cement clinker, described sulphoaluminate cement clinker comprises the following raw material components in parts by weight: 30 parts of bauxite, 49 parts of socalcite, 16 parts of desulfurized gypsum, 5 parts of aluminum ash share.

[0024] See Table 1 for the main components by weight percentage of bauxite, socalcite, desulfurized gypsum and aluminum ash in Example 1.

[0025] Table 1

[0026] raw materials / ingredients loss SiO 2

al 2 o 3

Fe 2 o 3

CaO MgO SO 3

TiO 2

Bauxite 11.34 16.39 59.58 3.9 0.84 1.57 2.67 Calcium stone 42.55 1.78 0.84 0.36 53.2 1.15 Desulfurization gypsum 16.08 1.53 0.27 0.12 34.92 0.24 43.36 aluminum gray 1.83 73.77 3.34 6.4 3.87

[0027] The preparation method of above-mentioned sulphoaluminate cement clinker, the steps are as follows:

[0028] S1. Mixing bauxite, supercalcite, desulfurized gypsum and alumi...

Embodiment 2

[0033] A sulphoaluminate cement clinker, the sulphoaluminate cement clinker comprises the following raw material components in parts by weight: 29 parts of bauxite, 47 parts of socalcite, 10 parts of desulfurized gypsum, 8 parts of aluminum ash share.

[0034] The main components in weight percent of bauxite, socalcite, desulfurized gypsum and aluminum ash in Example 2 are the same as those in Example 1.

[0035] The preparation method of above-mentioned sulphoaluminate cement clinker, the steps are as follows:

[0036] S1. Mixing bauxite, supercalcite, desulfurized gypsum and aluminum ash, grinding and sieving to obtain mixed powder;

[0037] S2. Calcining and cooling the mixed powder to prepare the sulphoaluminate cement clinker.

[0038] In step S1, the sieving is through a 200-mesh sieve.

[0039] In step S2, the calcination is performed at 1000-1300° C. for 30 minutes, and then at 1300-1350° C. for 15 minutes.

Embodiment 3

[0041] A sulphoaluminate cement clinker, the sulphoaluminate cement clinker comprises the following raw material components in parts by weight: 24 parts of bauxite, 52 parts of socalcite, 16 parts of desulfurized gypsum, 8 parts of aluminum ash share.

[0042] The main components in weight percent of bauxite, socalcite, desulfurized gypsum, and aluminum ash in Example 3 are the same as those in Example 1.

[0043] The preparation method of above-mentioned sulphoaluminate cement clinker, the steps are as follows:

[0044] S1. Mixing bauxite, supercalcite, desulfurized gypsum and aluminum ash, grinding and sieving to obtain mixed powder;

[0045] S2. Calcining and cooling the mixed powder to prepare the sulphoaluminate cement clinker.

[0046] In step S1, the sieving is through a 200-mesh sieve.

[0047] In step S2, the calcination is performed at 1000-1300° C. for 30 minutes, and then at 1300-1350° C. for 15 minutes.

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Abstract

The invention discloses sulphoaluminate cement clinker and a preparation method thereof, which relate to the technical field of sulphoaluminate cement clinker. The sulphoaluminate cement clinker comprises the following raw material components in parts by weight: 24-30 parts of bauxite, 46-52 parts of high calcium stone, 10-16 parts of desulfurized gypsum and 5-11 parts of aluminum ash. The preparation method comprises the following steps of S1, mixing bauxite, high calcium stone, desulfurized gypsum and aluminum ash, grinding and sieving to obtain mixed powder, and S2, calcining the mixed powder, and cooling to obtain the sulphoaluminate cement clinker. According to the sulphoaluminate cement clinker provided by the invention, industrial hazardous waste aluminum ash is adopted as a raw material component to replace part of bauxite, so that the sulphoaluminate cement clinker is beneficial to environmental protection, the treatment pressure of aluminum ash waste is reduced, the production cost can be reduced, and comprehensive utilization of resources is realized; the sulphoaluminate cement clinker provided by the invention is short in setting time and high in strength.

Description

technical field [0001] The invention relates to the technical field of sulphoaluminate cement clinker, in particular to a sulphoaluminate cement clinker and a preparation method thereof. Background technique [0002] Sulphoaluminate cement is a clinker composed mainly of anhydrous calcium sulphoaluminate and dicalcium silicate, which is composed of limestone, bauxite and gypsum with appropriate components as raw materials and calcined at low temperature. The hydraulic gelling material produced by grinding has a series of excellent properties such as early strength, rapid hardening, and low alkalinity. [0003] Aluminum ash is one of the many by-products produced during the aluminum smelting and forming process. Aluminum ash is produced in all aluminum melting processes, and the aluminum content in it accounts for about 1-12% of the total loss in the process of aluminum production and use. Aluminum ash is usually dumped as waste residue, which not only causes waste of alumi...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/36C04B7/44
CPCC04B7/32C04B7/36C04B7/44
Inventor 王新峰韩朝敏韩学峰刘银东候学亮梁永强申春红李瑞红吴少贞
Owner DENGDIAN GROUP CEMENT
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