Ultrafine fly ash and preparation method thereof

A technology of ultra-fine fly ash and coal ash, which is applied in cement production and other directions, can solve the problems of rising raw material prices, environmental pollution, and supply reduction, and achieve stable cement quality performance, reduce production costs, and reduce usage. Effect

Inactive Publication Date: 2019-05-07
无锡市金希达新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the production of clinker for cement needs to consume a lot of mine resources. On the other hand, in many coal-fired power plants, thermal power plants, steel industries, and foundry industries in my country, a large amount of waste ash and sand are produced every day, causing serious pollution to the surrounding environment. , has seriously affected the quality of life of the surrounding people, and with the country's high attention to environmental protection and strict law enforcement, coal-fired power plants, thermal power plants, steel industry, and foundry industries are facing challenges due to waste ash and waste sand that cannot be processed. The environmental protection problems of enterprises. At the same time, in order to protect the green water and green mountains, the waste generated by coal-fired power plants, thermal power plants, steel industry, and foundry industry cannot be effectively disposed of. They can only stop or reduce production. Enterprises are also facing environmental protection problems. Test, either stop production and close the door, or transform and upgrade
[0004] The cement industry is also facing problems. Due to the strict mining of mineral resources in the country, the raw materials such as limestone, iron ore, clay, and silica sand required for cement clinker not only decrease in supply, but also cause a sharp increase in the price of raw materials. Business performance is seriously affected
At the same time, coal-fired power plants, thermal power plants, and iron and steel foundry industries cannot be effectively treated due to the large amount of waste ash, waste sand, and waste slag produced, which also seriously affects the development of enterprises. Therefore, it is urgent to promote enterprises to reduce costs and consumption through technological innovation.

Method used

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  • Ultrafine fly ash and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of superfine fly ash and preparation method thereof, raw material composition and ratio (by 100kg as unit):

[0022] (1) Take 44% dry fly ash, 25% steel slag, 2% lime, 1% defoamer, 20% waste sand, 3% waste gypsum, and 5% slag.

[0023] (2) Crush the waste sand and waste gypsum to less than or equal to 4mm, store them in the shed, and age them for two weeks to balance their physical properties.

[0024] (3) Carry out magnetic separation treatment on dry fly ash, waste sand, steel slag and furnace slag respectively to remove iron

[0025] (4) Mix dry fly ash, steel slag, lime, waste sand, waste gypsum, and slag uniformly by weight, add water and mix for 3 hours, add additives and mix for 2 hours, then feed put into the grinding system for grinding treatment for 3 hours, and then perform dehydration treatment, and control the moisture content within the range of ≤4wt%.

[0026] (5) After the dehydration is completed, stop the machine and pour out the mixture to ob...

Embodiment 2

[0028] A kind of superfine fly ash and preparation method thereof, raw material composition and ratio (by 100kg as unit):

[0029] (1) Take 44% dry fly ash, 25% steel slag, 2% lime, 1% defoamer, 20% waste sand, 3% waste gypsum, and 5% slag.

[0030] (2) Crush the waste sand and waste gypsum to less than or equal to 4mm, store them in the shed, and age them for two weeks to balance their physical properties.

[0031] (3) The dry fly ash, waste sand, steel slag, and furnace slag are subjected to magnetic separation treatment to remove iron to balance their physical properties.

[0032] (4) Mix dry fly ash, steel slag, lime, waste sand, waste gypsum, and slag uniformly by weight, add water and mix for 4 hours, add additives and mix for 3 hours, and then feed Put it into the grinding system for grinding treatment for 1.5 hours, and then perform dehydration treatment, and control the moisture content within the range of ≤4wt%.

[0033] (5) After the dehydration is completed, stop...

Embodiment 3

[0035] A kind of superfine fly ash and preparation method thereof, raw material composition and ratio (by 100kg as unit):

[0036] (1) Take 44% dry fly ash, 25% steel slag, 2% lime, 1% defoamer, 20% waste sand, 3% waste gypsum, and 5% slag.

[0037] (2) Crush the waste sand and waste gypsum to less than or equal to 4mm, and store them in the shed respectively, and stale for two weeks to balance their physical properties.

[0038] (3) Carry out magnetic separation treatment on dry fly ash, waste sand, steel slag and furnace slag respectively to remove iron

[0039] (4) Mix dry fly ash, steel slag, lime, waste sand, waste gypsum, and slag uniformly by weight, add water and mix for 5 hours, add additives and mix for 4 hours, and then feed put into the grinding system for grinding treatment for 2 hours, and then perform dehydration treatment, and control the moisture content within the range of ≤4wt%.

[0040] (5) After the dehydration is completed, stop the machine and pour out...

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Abstract

The invention relates to the technical field of cement production. A purpose of the present invention is to replace or reduce the clinker consumption for cement production by using ultrafine fly ash so as to reduce the production cost of enterprises. The invention relates to ultrafine fly ash and a preparation method thereof, wherein the ultrafine fly ash comprises the following raw materials by weight: 40-50% of dry fly ash, 20-30% of steel residue, 1.5-3% of lime, 0.8-1.5% of a defoamer, 15-25% of waste sand, 3-5% of waste gypsum, and 5-8% of slag. According to the present invention, the ultrafine fly ash is prepared through breaking, magnetic separation, mixing, grinding, dehydration and other processes; and the method has advantages of simple and practical operation, effectively reduced cement clinker consumption, reduced heat consumption of clinker firing, production cost reducing, cement quality stabilizing, dry shrinkage rate improving, cement solidification rate enhancing, cement strength enhancing and the like, and is conducive to the promotion and application of energy saving and emission reduction.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to a method of using ultrafine fly ash to reduce traditional water [0002] Amount of mud used, and a kind of superfine fly ash and its preparation method provided instead of cement clinker Background technique [0003] Cement is the main material in my country's building materials industry. For many years, the traditional clinker components for production are mainly composed of limestone, iron ore, clay, silica sand, coal gangue and so on. On the one hand, the production of clinker for cement needs to consume a lot of mine resources. On the other hand, in many coal-fired power plants, thermal power plants, steel industries, and foundry industries in my country, a large amount of waste ash and sand are produced every day, causing serious pollution to the surrounding environment. , has seriously affected the quality of life of the surrounding people, and with the country's ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/28C04B7/17C04B7/38
CPCY02P40/10
Inventor 张加秋张加兴
Owner 无锡市金希达新型建材有限公司
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