Harmless regeneration recycling method of trash fly ash by using blast furnace

A technology of garbage fly ash and ironmaking blast furnace, which is applied in the field of garbage fly ash processing, can solve the problems of high construction and operation costs, persistent environmental hazards, genetic defects, etc., and achieve low construction and operation costs, construction and Extreme operating costs, huge social and economic benefits

Active Publication Date: 2009-10-14
CHONGQING ANGRUIYUE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for melting treatment in a high-temperature oxidizing atmosphere, research in the industry is either to design special equipment, or to use pelletizing shaft furnaces, sintering furnaces, steelmaking converters, etc. in ironmaking equipment. Requirements for the treatment of harmful substances such as dioxin, etc., but the high-temperature oxidizing atmosphere is used for melting treatment. When the melting temperature is above 800°C, all trivalent chromium in heavy metals will be converted into hexavalent chromium, and hexavalent chromium is swallowed. Sexual poison/inhalation extremely toxic, skin contact may cause sensitivity, more likely to c

Method used

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  • Harmless regeneration recycling method of trash fly ash by using blast furnace

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Effect test

Embodiment 1

[0026] Embodiment 1: mixed injection mode with pulverized coal, the mixed amount of garbage fly ash is 1%-10% of the total weight of injection:

[0027]The blast furnace coal injection process system is mainly composed of raw coal storage and transportation, coal powder preparation, coal powder transportation, coal powder injection, dry gas preparation and gas supply power system. can be used as figure 1 The shown blast furnace pulverized coal injection system (side-by-side tank type), in which 1. Dump truck 2. Media receiving machine 3. Belt conveyor 4. Raw coal bunker 5. Coal feeder 6. Coal mill 7. Drying gas furnace 8. Bag collector 9. Air locker 10. Plug valve 11. Coal powder bin 12. Powder bin electronic scale 13. Fluidizing nozzle 14. Spherical reversing valve 15. Blowing tank feeding valve 16. Soft connection 17. Spray Blowing tank 18. Blowing tank electronic scale 19. Lower coal valve 20. Injection valve 21. Mixer (or adjustable coal powder feeder) 22. Coal powder inj...

Embodiment 2

[0032] 1. The method of making recycled pellets:

[0033] Raw material composition scheme 1 of recycled pellets:

[0034] Steelmaking dedusting sludge containing more than 60% iron accounts for 30%;

[0035] 40% of sintering dust with iron content above 60%;

[0036] 30% of ironmaking gravity dust with iron content above 60%;

[0037] Garbage fly ash accounts for 3%;

[0038] Adhesive GY-31%, heavy metal stabilizer TSA-1 0.2%.

[0039] Raw material composition scheme 2 of recycled pellets:

[0040] Steelmaking dedusting sludge containing more than 60% iron accounts for 50%;

[0041] 30% of sintering dust with iron content above 60%;

[0042] Ironmaking gravity dust with an iron content of more than 60% accounts for 20%;

[0043] Garbage fly ash accounts for 10%;

[0044] Adhesive GY-32%, heavy metal stabilizer TSA-10.4%.

[0045] Raw material composition scheme of recycled pellets 3

[0046] Steelmaking dedusting sludge containing more than 60% iron accounts for 50%;...

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Abstract

The invention discloses a harmless regeneration recycling method of trash fly ash by using a blast furnace. The method has steps as follows: the blast furnace is used as processing equipment; trash fly ash is mixed into pulverized coal before the blast furnace injects coal, the mixture of pulverized coal and trash fly ash is delivered into the hearth of the blast furnace through the process of coal injection; or trash fly ash is mixed into the regenerative balls which are used by the blast furnace, and the regenerative balls mixing with trash fly ash are delivered into the blast furnace and used as common raw materials-pellet ore for ironmaking process in the blast furnace; the pellet ore is normally smelted, the high temperature and reducing atmosphere in the hearth area is used for processing and regenerating the fly ash. The invention can process mass trash fly ash, and does not need more special equipments. Not only the method can effectively process harmful material without new harmful products, but also calcium and other metal materials in the fly ash can be used for ironmaking process in the blast furnace, and then brought into pig iron or furnace cinder to be regenerated and utilized.

Description

technical field [0001] The invention belongs to the technology of garbage treatment, and in particular relates to the technology of treating garbage fly ash. Background technique [0002] Garbage fly ash is produced in waste incineration treatment. The main components of garbage fly ash are CaO, SiO2, Al2O3, SO3, etc., which contain high concentrations of heavy metals Pb, Cd, Hg, Cr, Cu, Zn, etc., and Dioxin, therefore, garbage fly ash is a substance that has entered the national catalog of dangerous substances, and must be effectively treated to prevent its pollution to the environment. At present, there are three relatively safe garbage fly ash treatment methods: 1. Cement coagulation and solidification treatment—landfill; 2. Chemical agent treatment—landfill; 3. Melting treatment—recycling. The melting treatment-recycling method is a more advanced treatment method. [0003] Melting treatment—recycling methods are divided into two categories: one is melting treatment in ...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 李秉正杨龙邓勇
Owner CHONGQING ANGRUIYUE SCI & TECH
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