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Method for preparing belite-sulfoaluminate cement by mechanochemical process at low temperature

A technology of belite sulfoaluminate and mechanochemical method, which is applied in the field of materials, can solve problems such as high energy consumption and complicated process, and achieve the effects of low energy consumption, lower calcination temperature, and lower chemical reaction barrier

Active Publication Date: 2019-07-05
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-temperature method for preparing Belite sulphoaluminate cement by mechanochemical method, so as to overcome the problems of complex process and high energy consumption in the process of preparing sulphoaluminate cement in the prior art, And it can realize the effective treatment of waste residue

Method used

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  • Method for preparing belite-sulfoaluminate cement by mechanochemical process at low temperature
  • Method for preparing belite-sulfoaluminate cement by mechanochemical process at low temperature
  • Method for preparing belite-sulfoaluminate cement by mechanochemical process at low temperature

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Embodiment 1

[0028] A method for preparing Belite sulfoaluminate cement by mechanochemical method at low temperature, comprising the steps of:

[0029] (1) Break silicon raw materials (blast furnace slag), aluminum raw materials (bauxite), calcareous raw materials (limestone) and industrial gypsum (desulfurized gypsum) into particles below 10mm, and then press 39.74:22.36:26.21: 12.25 mass ratio batching, ball milling (ball-to-material ratio 4:1, rotating speed 150r / min), after grinding for 24 hours (during every 3 hours, take out and crush the sinking material), to obtain raw meal;

[0030] (2) Press the raw material into tablets at 3-5MPa, then calcined at 900°C, after 2 hours of heat preservation, take out and quench to obtain the clinker, and carry out XRD test on the clinker (such as figure 1 );

[0031] (3) Mix the clinker and dihydrate gypsum (the amount of dihydrate gypsum accounts for 5% of the clinker) and grind until it passes through a square hole sieve with an aperture of 80 ...

Embodiment 2

[0033] A method for preparing Belite sulfoaluminate cement by mechanochemical method at low temperature, comprising the steps of:

[0034] (1) Break silicon raw materials (steel slag), aluminum raw materials (bauxite), calcareous raw materials (limestone) and industrial gypsum (desulfurized gypsum) into particles below 10mm, and then press 29.05: 15.56: 42.46: 12.94 The mass ratio batching is carried out ball milling (ball-to-material ratio 5:1, rotating speed 250r / min), after grinding for 72h (period every 3h takes out and crushes sediment), obtains raw meal;

[0035] (2) Press the raw material into tablets at 3-5MPa, then calcined at 1000°C, after 1 hour of heat preservation, take out and quench to obtain the clinker, and carry out XRD test on the clinker (such as figure 2 );

[0036] (3) Mix the clinker and dihydrate gypsum (the amount of dihydrate gypsum accounts for 9% of the clinker), and grind until it passes through a square hole sieve with an aperture of 80 μm. The ...

Embodiment 3

[0038] A method for preparing Belite sulfoaluminate cement by mechanochemical method at low temperature, comprising the steps of:

[0039] (1) Break silicon raw materials (fly ash), aluminum raw materials (bauxite), calcareous raw materials (limestone) and industrial gypsum (desulfurized gypsum) into particles below 10mm, and then press 31.9:17.7:38.05 : 12.35 mass ratio batching, carry out ball milling (ball-to-material ratio 6:1, rotating speed 350r / min), after grinding 60h (period every 3h takes out and crushes sedimentation material), obtains raw meal;

[0040] (2) Press the raw material into tablets at 3-5MPa, then calcined at 1100°C, after 2 hours of heat preservation, take out and quench to obtain the clinker, and carry out XRD test on the clinker (such as image 3 );

[0041] (3) Mix the clinker and dihydrate gypsum (the amount of dihydrate gypsum accounts for 13% of the clinker), and grind until it passes through a square hole sieve with an aperture of 80 μm. The sie...

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Abstract

The invention relates to a method for preparing belite-sulfoaluminate cement by a mechanochemical process at low temperature. The method includes separately crushing a siliceous raw material, an aluminum raw material, a calcium raw material and industrial gypsum; and blending the materials and performing ball milling for 24-72 h to obtain a raw batch; subjecting the raw batch to sheet compression,maintaining the temperature at 900-1200 DEG C for 1-3 h, taking a product out, and quenching the product to obtain clinker; and fully mixing the clinker and dihydrate gypsum, and grinding the mixtureto obtain the cement. Through the mechanochemical process, material activity is improved, the potential barrier of the chemical reaction is reduced, low-temperature formation of the belite-sulfoaluminate cement clinker mineral is induced more efficiently, the calcination temperature for the belite-sulfoaluminate cement is reduced by 150-250 DEG C than traditional calcination temperature, and themethod is simple in process, low in energy consumption, low in carbon and green.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing belite-sulfoaluminate cement at low temperature by means of mechanochemical method. [0002] technical background [0003] In recent years, with the increasing call for energy saving and emission reduction in the world, traditional cement production is facing great challenges due to the consumption of large amounts of resources and energy and the generation of large amounts of greenhouse gases. Statistics show that the energy consumption of the cement industry accounts for about 2% of the global primary energy consumption, or nearly 5% of the global industrial energy consumption; its CO 2 of global CO emissions 2 5% of total emissions. For my country's cement industry, which accounts for nearly 60% of the global output, the energy saving and emission reduction of the cement industry is particularly urgent. [0004] Belite sulfoaluminate ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/44C04B7/36
CPCC04B7/32C04B7/36C04B7/44Y02P40/10
Inventor 郭伟王枭管荣成张春玲曹文涛
Owner YANCHENG INST OF TECH
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