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A clean production control method for vertical electric furnace steelmaking

A clean production, electric furnace steelmaking technology, applied in cleaning methods and appliances, electric furnaces, chemical instruments and methods, etc., can solve problems such as inconsistency in system control, the impact of clean production in workshops, and unfavorable occupational health of on-site production workers. Reduce the production of dioxins, ensure cleaner production, and improve the effect of comprehensive utilization

Active Publication Date: 2022-03-29
SHIJIAZHUANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both dust removal and collection methods cannot capture 100% of the escaping flue gas, especially for the vertical electric furnace flue gas collection method, it is difficult to set up a dog house collection cover, which has a great impact on the clean production inside the workshop , is not conducive to the occupational health of on-site production staff, is not conducive to the maintenance of on-site equipment, and is not conducive to the requirements of clean production
The main reason is that the design of the collection method of the dust removal hood is unreasonable, the setting of the smoke collection points is not comprehensive, and the system control is not coordinated.

Method used

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  • A clean production control method for vertical electric furnace steelmaking
  • A clean production control method for vertical electric furnace steelmaking

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Experimental program
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Effect test

Embodiment 1

[0025] This embodiment is a clean production control method for vertical electric furnace steelmaking, which includes adjusting the primary flue gas and secondary flue gas control systems at all levels in each smelting period according to the scrap steel cone ratio and corresponding to different flue gas control system models The opening of the valve is used to ensure the collection rate of flue gas. The specific model control requirements are as follows:

[0026]When the scrap pile ratio used is ≤0.3t / m³ as raw material. Feeding period: Feeding period: valve 1 of the flue gas collection hood on the tapping side, valve 11 of the flue gas collection hood on the slag discharge side, the secondary flue gas secondary control system is closed, and does not work; the roof collection hood valve 9 secondary smoke The opening degree of the first-level gas control system is 100%; the opening degree of the ring-shaped collection cover valve 5 around the shaft is 100% for the primary flue...

Embodiment 2

[0029] This embodiment is a clean production control method for vertical electric furnace steelmaking, which includes adjusting the primary flue gas and secondary flue gas control systems at all levels in each smelting period according to the scrap steel cone ratio and corresponding to different flue gas control system models The opening of the valve is used to ensure the collection rate of flue gas. The specific model control requirements are as follows:

[0030] When the scrap steel used is 0.3t / m³

Embodiment 3

[0033] This embodiment is a clean production control method for vertical electric furnace steelmaking, which includes adjusting the primary flue gas and secondary flue gas control systems at all levels in each smelting period according to the scrap steel cone ratio and corresponding to different flue gas control system models The opening of the valve is used to ensure the collection rate of flue gas. The specific model control requirements are as follows:

[0034] When the scrap pile ratio used is ≥0.9t / m³ as raw material. Feeding period: valve 1 of the flue gas collection hood on the tapping side, valve 11 of the flue gas collection hood on the slag discharge side, the secondary flue gas secondary control system is closed and does not work; the roof collecting hood valve 9 secondary flue gas primary The opening degree of the control system is 100%; the opening degree of the primary flue gas secondary control system of 5 primary flue gas secondary control systems is 100%; The...

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Abstract

The invention relates to a clean production control method for vertical electric furnace steelmaking, which belongs to the technical field of metallurgy and environmental protection. The technical solution of the present invention is: to install individual flue gas collection hoods at all the flue gas generating points of the vertical electric furnace; to divide all the flue gas collection hoods into system functions; to carry out secondary classification and independent control of the same functional flue gas collection system; Through different scrap steel cone ratios, different flue gas system control models are formulated; according to different smelting periods, the residual CO in the primary flue gas is burned by adjusting the special valve (5) for secondary combustion, and then the flue gas is treated. The beneficial effects of the present invention are: 100% capture and treatment of vertical electric furnace steelmaking flue gas; reduction of escape of primary flue gas, improvement of airtightness in electric furnace, and reduction of dioxin generation in flue gas; The interlocking control adjustment is more conducive to the energy saving of the system; it can ensure the clean production of the vertical electric furnace steelmaking.

Description

technical field [0001] The invention relates to a clean production control method for vertical electric furnace steelmaking, which belongs to the technical field of metallurgy and environmental protection. Background technique [0002] At present, the feeding method of electric furnace steelmaking adopts the upper part of the furnace body for feeding, and the molten steel after smelting is tapped from the rear of the furnace body. Due to the phenomenon of flue gas escape in the process of feeding, smelting, slag tapping and tapping. According to the design standard, the current capture rate is >80%, and it is not yet possible to capture 100% of the escaped flue gas. Due to the limitation of equipment conditions and characteristics, the flue gas collection method of steelmaking electric furnace cannot be designed to be similar to the collection method of primary dust removal + secondary dust removal + third dust removal of steelmaking converter. Moreover, there are vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52B08B15/04
CPCC21C5/52B08B15/04Y02P10/20
Inventor 董大西杨韦华刘勇范建通陈良勇郑阳霍彦朋张彩斌李世琪华祺年
Owner SHIJIAZHUANG IRON & STEEL
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