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Method for preparing calcium sulphosilicate-Belite-sulfoaluminate cement clinker at low temperature

A technology of sulphoaluminate cement and calcium sulphosilicate, which is applied in the field of materials, can solve the problems of high energy consumption and complex process, and achieve the effects of low energy consumption, lower calcination temperature, and saving raw material costs

Inactive Publication Date: 2019-08-02
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing calcium sulfosilicate-belit-sulfoaluminate cement clinker at low temperature, to overcome the above-mentioned deficiencies of complex process and high energy consumption in the prior art, and to realize waste slag effective handling of

Method used

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  • Method for preparing calcium sulphosilicate-Belite-sulfoaluminate cement clinker at low temperature
  • Method for preparing calcium sulphosilicate-Belite-sulfoaluminate cement clinker at low temperature
  • Method for preparing calcium sulphosilicate-Belite-sulfoaluminate cement clinker at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing calcium sulfosilicate-belite-sulfoaluminate cement clinker at low temperature includes the following steps:

[0024] (1) Crush the siliceous raw material (steel slag), calcareous raw material (limestone), aluminum raw material (bauxite) and industrial gypsum (desulfurized gypsum) into particles less than 10mm, and then press 28.29:39.15:9.05:23.05 The mass ratio of the ingredients, ball milling (ball to material ratio 4:1, speed 150r / min), after 72h grinding (during the period, take out the mashed sinking material every 3h) to obtain raw material;

[0025] (2) Press the raw meal into square tablets under 3MPa, and then calcinate the square tablets at 1000°C. After holding for 1 hour, take out the rapid cooling, and then grind until the particles pass through a square hole sieve with an aperture of 80μm, and the sieve residue is less than 10%. Calcium sulfosilicate-belite-sulfoaluminate cement clinker is obtained.

[0026] The XRD pattern of the prepared...

Embodiment 2

[0028] A method for preparing calcium sulfosilicate-belite-sulfoaluminate cement clinker at low temperature includes the following steps:

[0029] (1) Crush siliceous raw materials (coal gangue), calcareous raw materials (calcium slag), aluminum raw materials (aluminum slag) and industrial gypsum (desulfurized gypsum) into particles below 10mm, and then press 27.67:37.04:12.72: 22.57 mass ratio ingredients, ball milling (ball-to-material ratio 5:1, speed 250r / min), after grinding 48h (during the period, take out the mashed sinking material every 3h) to obtain raw meal;

[0030] (2) Press the raw meal into square tablets under 3MPa, and then calcinate the square tablets at 1100°C. After holding for 2h, take out the quench, and then grind until the particles pass through a square-hole sieve with an aperture of 80μm, and the sieve residue is less than 10%. Calcium sulfosilicate-belite-sulfoaluminate cement clinker is obtained.

[0031] The XRD pattern of the prepared cement clinker is ...

Embodiment 3

[0033] A method for preparing calcium sulfosilicate-belite-sulfoaluminate cement clinker at low temperature includes the following steps:

[0034] (1) Crush the siliceous raw material (coal gangue), calcareous raw material (limestone), aluminum raw material (bauxite) and industrial gypsum (desulfurized gypsum) into particles below 10mm, and then press 38.75:19.72:19.78: 22.29 mass ratio ingredients, ball milling (ball-to-battery ratio 6:1, speed 350r / min), after grinding for 60h (during the period, take out the mashed sinking material every 3h) to obtain raw meal;

[0035] (2) Press the raw meal into square slices under 4MPa, calcinate the square slices at 1200°C, keep it for 2 hours, take out the quench, and then grind until the particles pass through a square-hole sieve with an aperture of 80μm, and the sieve residue is less than 10%. Obtain calcium sulfosilicate-belite-sulfoaluminate cement clinker.

[0036] The XRD pattern of the prepared cement clinker is shown in image 3 .

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Abstract

The invention relates to a method for preparing calcium sulphosilicate-Belite-sulfoaluminate cement clinker at low temperature, and belongs to the technical field of building materials. The method comprises the following steps: crushing a siliceous raw material, a calcium raw material, an aluminum raw material and industrial gypsum respectively; then, proportioning according to a mass ratio of (25.67-39.31):(18.4-39.21):(4.64-20.53):(16.4-24.59), and performing ball milling for 24-72h to obtain a raw material; pressing the raw material into square pieces, then calcinating the square piece at 900-1200 DEG C, preserving heat for 1-3h, taking out for quenching, and then grinding to obtain the calcium sulphosilicate-Belite-sulfoaluminate cement clinker. According to the method, industrial waste residues are used as the main raw materials; by a mechanochemical method, the activity of a material is improved, the potential barrier of a chemical reaction is lowered, change of the texture, thestructure and the performance of the material is induced more efficiently, and the calcination temperature of calcium sulphosilicate-Belite-sulfoaluminate cement is reduced; the method is low in energy consumption and environmentally friendly.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a method for preparing calcium sulfosilicate-belite-sulfoaluminate cement clinker at low temperature. [0002] technical background [0003] As the first of the three building materials and the pillar of urbanization, cement has promoted the improvement of economic level, but it has brought inevitable environmental pollution and high energy consumption problems. [0004] Traditional Portland cement uses limestone, clay and some calibration raw materials as the main raw materials, and then is calcined at 1450°C to form tricalcium silicate, tricalcium aluminate, dicalcium silicate and tetracalcium aluminate ferrite. Compared with Portland cement, sulphoaluminate cement has the characteristics of low energy consumption, high early strength, good frost resistance and durability, so it is widely used in winter construction projects. Belite is dicalcium silicate (C 2 S), usually o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/345C04B7/32C04B7/147C04B7/24C04B7/26C04B7/36
CPCC04B7/147C04B7/24C04B7/26C04B7/323C04B7/3453C04B7/36Y02P40/10
Inventor 郭伟王枭阮浩董浩管荣成
Owner YANCHENG INST OF TECH
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