Efficient environment-friendly white cement production method

A production method, white cement technology, applied in cement production, separation methods, chemical instruments and methods, etc., can solve the problems of high coal ash content, high price, low calorific value, etc., to improve production efficiency, improve qualification, and obtain simple effect

Active Publication Date: 2021-12-31
阿尔博波特兰安庆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current white cement production method has the following problems: when the traditional white cement is calcined, the fuel used is coal or natural gas, but coal

Method used

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  • Efficient environment-friendly white cement production method
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Bleaching clinker, added material, high-quality natural gypsum are discharged corresponding to the quantitatively weighed ingredients scale;

[0049] Clinker, added material, retarder transported into cement mill, and mixed to obtain white cement material.

Example Embodiment

[0050] Example 2

[0051] Bleaching clinker, added material, are discharged to the gypsum corresponding batching scales quantitatively weighed; the Hunter whiteness ≥86 gypsum, FGD gypsum in the SO 3 Content ≧ 40%, calcium sulfite content of ≦ 10%, chloride ion content ≤0.02%, the gypsum slurry state, in which water content of 20-40% by cryogenic drying mode; brightness control in order to ensure white cement product quality; SO 3 To reduce air pollution control; calcium sulfite, chloride ion to avoid the control of the strength of cement, impact performance and setting time of the cement during application; control water content in order to ensure normal transport and mixing of materials, too much water will affect mixing and transfer efficiency; these are the important parameters in the preparation of a white cement qualified;

[0052]Clinker, added material, retarder transported into cement mill, and mixed to obtain white cement material.

[0053] However, due to high-quality n...

Example Embodiment

[0054] Example 3

[0055] Bleaching discharged clinker, added material, gypsum salts respectively corresponding to the batching scales quantitatively weighed; the salt Hunter whiteness ≥90 gypsum, the gypsum salt SO 3 Content ≧ 40%, calcium sulfite content of ≦ 10%, chloride ion content ≤0.02%, said salt is a gypsum slurry state, the water content is controlled by low-temperature drying in 20-40%; brightness control in order to ensure white cement product quality; SO 3 To reduce air pollution control; calcium sulfite, chloride ion to avoid the control of the strength of cement, impact performance and setting time of the cement during application; control water content in order to ensure normal transport and mixing of materials, too much water will affect mixing and transfer efficiency; these are the important parameters in the preparation of a white cement qualified;

[0056] Clinker, added material, retarder transported into cement mill, and mixed to obtain white cement material;...

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Abstract

The invention provides an efficient environment-friendly white cement production method which comprises the following steps: S1, raw material preparation; S2, clinker preparation: conveying a part of petroleum coke in a powder state to an outlet end of a rotary kiln, and burning at the outlet end to heat the rotary kiln; conveying the other part of the petroleum coke into a decomposing furnace at the bottom end of the cyclone preheater, and burning the petroleum coke in the decomposing furnace to heat the cyclone preheater; s2, feeding the raw material prepared in the step S1 into the cyclone preheater, and performing multi-stage preheating on the raw material; enabling the raw materials obtained after preheating to enter a rotary kiln to be calcined, preparing the clinker, in the calcining process, discharging flue gas at the kiln head to a kiln head electric dust collector, and discharging flue gas at the kiln tail to a kiln tail bag-type dust collector; s3, preparing a finished product; the petroleum coke is introduced as the calcining raw material so that the production efficiency can be effectively improved, and the restriction of coal on white cement quality improvement and the disadvantage of high price of natural gas are solved; meanwhile, alkali-containing pyrophyllite and potassium feldspar are introduced as raw materials to eliminate sulfur generated in petroleum coke calcination.

Description

technical field [0001] The invention belongs to the technical field of white cement processing, and in particular relates to a production method of high-efficiency and environment-friendly white cement. Background technique [0002] White Portland cement refers to a hydraulic cementitious material made of white Portland cement clinker with less iron oxide content, an appropriate amount of gypsum and mixed materials (limestone and kiln dust); white Portland cement is mainly used For decoration of buildings, such as floors, stairs, steps, exterior wall finishes; [0003] The current white cement production method has the following problems: when the traditional white cement is calcined, the fuel used is coal or natural gas, but coal is not conducive to the improvement of the quality of white cement due to its high ash content and low calorific value; Expensive, also can't be applied in actual production. Contents of the invention [0004] Aiming at the deficiencies in the ...

Claims

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Application Information

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IPC IPC(8): C04B7/06C04B28/04C04B7/44C04B22/14B01D50/00
CPCC04B7/06C04B28/04C04B7/44C04B7/4407C04B22/145C04B22/146B01D50/00C04B2103/22C04B2103/0068Y02P40/10
Inventor 张俊刘永鸿王斌陈贤琪张超邓修宏吴玉林
Owner 阿尔博波特兰安庆有限公司
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