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Red mud-based calcium sulphosilicate-calcium aluminoferrite cement raw material, cement clinker, cement and preparation method thereof

A technology of calcium sulfosilicate and calcium ferric aluminate, applied in the field of cement, can solve problems such as reducing the sintering temperature of cement clinker, and achieve the effects of improving curing ability, avoiding efflorescence phenomenon and enhancing solid solution ability.

Active Publication Date: 2020-11-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the inventors believe that the current high-iron cement preparation method still has the following deficiencies: (1) need to reduce the firing temperature of cement clinker, avoid calcium aluminate ferrite fusion, thereby improve its content in cement clinker content
(2) The hydration activity of calcium aluminoferrate is lower than that of Alite, the main mineral of Portland cement, and calcium sulfoaluminate, the main mineral of sulfoaluminate cement, and its hydration activity needs to be further improved.

Method used

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  • Red mud-based calcium sulphosilicate-calcium aluminoferrite cement raw material, cement clinker, cement and preparation method thereof
  • Red mud-based calcium sulphosilicate-calcium aluminoferrite cement raw material, cement clinker, cement and preparation method thereof
  • Red mud-based calcium sulphosilicate-calcium aluminoferrite cement raw material, cement clinker, cement and preparation method thereof

Examples

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Effect test

no. 1 example

[0045] A method for preparing red mud-based calcium sulfosilicate-calcium aluminoferrite cement clinker, comprising the steps of:

[0046] (1) In parts by weight, 45 parts of limestone, 20 parts of red mud, 10 parts of barium slag, 30 parts of aluminum ash, and 20 parts of fluorogypsum were uniformly mixed, and ground through a 100-mesh sieve to obtain cement raw meal.

[0047] (2) Sprinkle water on the cement raw meal obtained in step (1), then press it into a cake in a mold, dry the obtained raw meal cake, and then calcinate the raw meal cake at 1125°C for 5min, and after completion, the obtained product Quenched in air to obtain cement clinker.

[0048] Performance Testing

[0049] (1) Carry out X-ray diffraction analysis to the cement clinker prepared by the present embodiment, and test the mineral composition of cement clinker by Rietveld quantitative analysis method, refer to figure 1 , its main mineral composition is 25% (mass) of calcium aluminoferrite, 45% (mass) ...

no. 2 example

[0056] A method for preparing red mud-based calcium sulfosilicate-calcium aluminoferrite cement clinker, comprising the steps of:

[0057] (1) In parts by weight, mix 50 parts of carbide slag, 30 parts of red mud, 15 parts of strontium slag, 20 parts of bauxite tailings, and 20 parts of borogypsum, and grind them through a 100-mesh sieve to obtain raw cement material.

[0058] (2) Sprinkle water on the cement raw meal obtained in step (1) and stir it evenly, then press it into a cake in a mold, dry the obtained raw meal cake, and then calcinate the raw meal cake at 1100°C for 20min, after completion, put The resulting product is quenched in air to obtain cement clinker.

[0059] Performance Testing

[0060] (1) Carry out X-ray diffraction analysis to the cement clinker prepared in this embodiment, and test the mineral composition of cement clinker by Rietveld quantitative analysis method, its main mineral composition is calcium aluminoferrite 47% (mass), calcium sulfosilic...

no. 3 example

[0065] A method for preparing red mud-based calcium sulfosilicate-calcium aluminoferrite cement clinker, comprising the steps of:

[0066] (1) In parts by weight, 45 parts of limestone, 35 parts of red mud, 15 parts of barium slag, 25 parts of bauxite tailings, and 15 parts of borogypsum were uniformly mixed, and ground through a 100-mesh sieve to obtain cement raw meal.

[0067] (2) Sprinkle water on the cement raw meal obtained in step (1) and stir it evenly, then press it into a cake in a mold, dry the obtained raw meal cake, and then calcinate the raw meal cake at 1150°C for 20min, after completion, put The resulting product is quenched in air to obtain cement clinker.

[0068] Performance Testing

[0069] (1) Carry out X-ray diffraction analysis to the cement clinker prepared in this embodiment, and test the mineral composition of cement clinker by Rietveld quantitative analysis method, its main mineral composition is 60% (mass) of calcium aluminum ferrite, calcium sul...

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Abstract

The invention relates to the technical field of cement, in particular to a red-mud-based calcium sulphosilicate-calcium aluminoferrite cement raw material, cement clinker, cement and a preparation method thereof.The cement raw material is prepared from, by weight, 30-50 parts of calcium raw materials, 20-50 parts of red mud, 10-25 parts of barium and / or strontium containing raw materials, 20-30 parts of aluminum raw materials and 5-20 parts of gypsum. According to the invention, the cement clinker with high content of calcium aluminoferrite is sintered at a low temperature, the phenomena of skinning and even blockage of a cement kiln caused by melting of the cement clinker are avoided, and the hydration activity of calcium aluminoferrite is significantly improved. Detection shows that thecontent of calcium aluminoferrite in the cement clinker is as high as 25-60%, the 28-day hydration degree of calcium aluminoferrite in the cement clinker is greater than or equal to 70%, the 28-day hydration degree of calcium sulphosilicate is greater than or equal to 25%, and the radioactivity of the cement clinker meets the conditions that IRa is less than or equal to 1.0 and Ir is less than orequal to 1.0.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to red mud-based calcium sulfosilicate-calcium aluminoferrite cement raw meal, cement clinker, cement and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The cement preparation process mainly includes: crushing and pre-homogenization → raw meal preparation → raw meal homogenization → preheating decomposition → clinker firing → cement grinding, and finally the main mineral composition is: tricalcium silicate, disilicic acid Calcium, tricalcium aluminate, calcium aluminate ferrite and calcium sulfate cement clinker; among them, the increase of calcium a...

Claims

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Application Information

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IPC IPC(8): C04B7/22C04B7/36
CPCC04B7/22C04B7/36
Inventor 黄永波郝勇芦令超段广彬程新
Owner UNIV OF JINAN
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