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Production method for preparing Portland cement from high-volume fly ash and chemical gypsum

A technology of Portland cement and chemical gypsum, applied in cement production, etc., can solve the problems of increasing industrial solid waste, achieve the effects of reducing solid waste accumulation, increasing flexural strength and compressive strength, and slowing down waste

Inactive Publication Date: 2020-08-07
张延年
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, industrial solid waste has also increased significantly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Add 25% of Class C fly ash to 0.2mol / L sodium hydroxide solution for prehydration, add 2.5% of lime, and let it stand for one month;

[0041] (2) Put (1) into a calcination furnace for calcination, the calcination temperature is 750 degrees Celsius, and the calcination time is 180 minutes to obtain modified fly ash.

[0042] (3) Grind 25% modified fly ash (the amount is the amount of class C fly ash in step 1), 5% desulfurized gypsum, 13.8% steel slag, and 17% slag, respectively, according to Add 0.1% triethanolamine in proportion, among which large cement clinker and steel slag should be crushed by jaw crusher, and various raw materials should be sorted by particle classifier. The particle size of fly ash should be less than 8 microns .

[0043] (4) Add 5% lime and 1.6% anhydrous sodium sulfate to the ground modified fly ash, desulfurized gypsum, steel slag, and slag from (3), and then add 30% cement clinker for stirring to produce Portland cement. The above-men...

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PUM

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Abstract

The invention discloses a production method for preparing Portland cement from high-volume fly ash and chemical gypsum, and belongs to the technical field of building materials; C-type fly ash, desulfurized gypsum, steel slag, mineral slag, cement clinker, lime, triethanolamine and anhydrous sodium sulfate are adopted to produce the high-volume fly ash and the chemical gypsum to prepare the Portland cement. Part of cement clinker can be replaced, the utilization of the fly ash, mineral slag, chemical gypsum and steel slag is increased, the investment of the high energy consumption cement industry is restricted, and the problems of accumulation of solid waste, improvement of the utilization of solid waste, environmental influence and the like can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a production method for preparing Portland cement with a large amount of fly ash and chemical gypsum. Background technique [0002] With the rise of the construction industry in the world, a lot of research on building materials has been produced. At the same time, industrial solid waste has also increased significantly. With the increasing accumulation of industrial solid waste and the use of less and less non-renewable resources in construction, the demand for industrial solid waste to be used in building materials is also increasing. The main sources of industrial solid waste in daily production and life are: coal gangue produced by the coal industry; blast furnace slag, steel slag and red mud produced by the metallurgical industry; fly ash and slag produced by fuel power plants and urban central heating systems; Chemical gypsum, calcium carbide slag, alkali slag,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/38C04B7/36C04B7/26C04B7/21C04B7/24
CPCC04B7/36C04B7/38C04B7/243C04B7/21C04B7/17Y02P40/10
Inventor 张延年崔长青顾晓薇海洪王亭张于于康楠王铁源闫明程于洋李志军陈志燕杜松岩董宁李琦琦陈昊刘柏男张文洁
Owner 张延年
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