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 is not conducive to the improvement of the quality of white cement due to its high ash content and low calorific value; Expensive and cannot be used in actual production

Method used

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  • Efficient environment-friendly white cement production method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The bleached clinker, additives, and high-quality natural gypsum are respectively discharged into the corresponding batching scales for quantitative weighing;

[0049] The clinker, additives and retarder are transported to the cement mill and mixed to produce white cement material.

Embodiment 2

[0051] The bleached clinker, additives, and desulfurized gypsum are respectively discharged into corresponding batching scales for quantitative weighing; the Hunter whiteness of the desulfurized gypsum is ≥86, and the SO in the desulfurized gypsum 3 content ≥ 40%, calcium sulfite content ≤ 10%, chloride ion content ≤ 0.02%, the desulfurization gypsum is in a slurry state, and its water content is controlled at 20-40% by low-temperature drying; whiteness control is to ensure White cement product quality; SO 3 The control is used to reduce air pollution; the control of calcium sulfite and chloride ions is used to avoid the impact on the strength of cement, the performance of setting time and the application of cement; the control of water content is to ensure the normal transportation and mixing of materials, too much water will affect Conveying efficiency and mixing effect; these are important parameters for preparing qualified white cement;

[0052]The clinker, additives and ...

Embodiment 3

[0055] The bleached clinker, additives, and salt gypsum are respectively discharged into corresponding batching scales for quantitative weighing; the Hunter whiteness of the salt gypsum is ≥90, and the SO in the salt gypsum 3 content ≥ 40%, calcium sulfite content ≤ 10%, chloride ion content ≤ 0.02%, the salt gypsum is in a slurry state, and its water content is controlled at 20-40% by low-temperature drying; whiteness control is to ensure White cement product quality; SO 3 The control is used to reduce air pollution; the control of calcium sulfite and chloride ions is used to avoid the impact on the strength of cement, the performance of setting time and the application of cement; the control of water content is to ensure the normal transportation and mixing of materials, too much water will affect Conveying efficiency and mixing effect; these are important parameters for preparing qualified white cement;

[0056] The clinker, additives and retarder are transported to the ce...

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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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