Method for producing high-reactivity coke by co-coking fly ash and coal

A production method, blast furnace dust removal technology, applied in carbonization furnaces, coke ovens, special forms of dry distillation, etc., can solve the problems of cumbersome patent operations, secondary pollution of sulfuric acid, etc., and achieve the effects of reducing costs, reducing CO2 emissions, and reducing pressure

Inactive Publication Date: 2019-09-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN104310553A proposes to use blast furnace dust to remove salt by soaking in water, and prepare flocculant as water treatment agent by sulfuric acid acidification, but the patent operation is cumbersome, and secondary pollution of sulfuric acid will be generated at the same time.

Method used

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  • Method for producing high-reactivity coke by co-coking fly ash and coal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The dedusting ash from the production plant is screened with a 60-mesh sieve. The content of the main substances in the dedusting ash is C (19%), TFe (20%), SiO 2 (8%), and the dedusting ash whose undersize particle size is less than 0.28mm is used as the used material, and the dedusting ash is dried, and the moisture of the dedusting ash after drying is less than 2%. Combine the processed dedusted ash with the basic blending coal (A d =8%,

[0024] VM d = 26%) for mechanical mixing, the amount of dedusting ash is 3% of the amount of coal used on the basis of blending, and the mixed material is added to the crusher for mechanical crushing. The particle size of the crushed material is less than 1mm. Add a certain amount of water to ensure that the water content of the mixture is 4%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain temperature rise system to obtain qualified high-reactivity coke, and carry out quality inspection...

Embodiment 2

[0026] The dedusting ash from the production plant is screened with a 60-mesh sieve. The content of the main substances in the dedusting ash is C (20%), TFe (22%), and SiO2 (9%). The ash is used as a material, and the dedusting ash is dried. After drying, the moisture content of the dedusting ash is less than 2%. Combine the processed dedusted ash with the basic blending coal (Ad = 7%, VM d = 27%) for mechanical mixing, the amount of dust removal is 4% of the amount of coal used on the basis of blending, and the mixed material is added to the crusher for mechanical crushing. The particle size of the crushed material is less than 1mm. Add a certain amount of water to ensure that the water content of the mixture is 5%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain temperature rise system to obtain qualified high-reactivity coke, and then carry out quality inspection of the coke. The test results of coke products are: M40 is 64.5%, M1...

Embodiment 3

[0028] The dedusting ash from the production plant is screened with a 60-mesh sieve. The content of the main substances in the dedusting ash is C (21%), TFe (23%), and SiO2 (8%). The ash is used as a material, and the dedusting ash is dried. After drying, the moisture content of the dedusting ash is less than 2%. Combine the processed dedusted ash with the basic blending coal (A d = 6%, VM d = 28%) for mechanical mixing, the amount of dedusting dust is 5% of the amount of coal used on the basis of blending, and the mixed material is added to the crusher for mechanical crushing. The particle size of the crushed material is less than 1mm, and the crushed material is mixed Add a certain amount of water to ensure that the water content of the mixture is 6%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain temperature rise system to obtain qualified high-reactivity coke, and then carry out quality inspection of the coke. The test results ...

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Abstract

The invention discloses a method for producing high-reactivity coke by co-coking fly ash and coal. The method comprises the following steps: screening blast furnace fly ash, and screening out fly ash having a particle size of below 0.28 mm; drying and dewatering the screened fly ash in a drying box; mechanically mixing and crushing the dried fly ash and basic blended coal; adjusting the water to ensure that the moisture content of the obtained mixture is 4-6%; and adding the mixture into a coke oven, carrying out high temperature carbonization, and cooling the obtained maturated coke through a dry quenching process to obtain the high-reactivity coke. The new method for preparing the high-reactivity coke is provided to solve the problem that the blast furnace fly ash only can be used for sintering and pelletizing or for the flotation preparation of carbon powder and iron powder, and has the advantages of full utilization of high-content carbon and iron in the fly ash, effective utilization of waste fly ash generated in the blast furnace, and reduction of the pressure to the environment.

Description

technical field [0001] The invention relates to the fields of high-temperature pyrolysis of coal into coke, comprehensive utilization of metallurgical dust and environmental protection, and more specifically relates to a method for producing high-reaction coke by co-coking of dedusted ash and coal. Background technique [0002] Blast furnace dust refers to the dust collected by the dust collector when iron and furnace top are discharged. Its main components are iron and carbon, and it also contains a small amount of oxides of other elements such as silicon and calcium. It is a light weight, tiny particle and contains A variety of toxic and harmful substances are one of the main solid emissions from iron and steel enterprises. The output of China's blast furnace dust removal is 15-50kg / t (iron), which is a huge amount. Due to the characteristics of fine particle size and low density of blast furnace dust, it will cause serious environmental pollution and waste a lot of iron ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/10C10B57/06C10B53/04C10B1/00
CPCC10B1/00C10B53/04C10B57/06C10B57/10C10L2290/141
Inventor 王玉明胡德生毛晓明钱晖徐万仁
Owner BAOSHAN IRON & STEEL CO LTD
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