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A continuous online refining equipment and production process for molten steel

A technology of refining equipment and production process, which is applied in the field of continuous on-line refining equipment and production process of molten steel, which can solve problems such as difficulty in achieving stable operation of the system and inability to guarantee production continuity, so as to avoid air infiltration and improve continuity and compactness , the effect of increasing production

Active Publication Date: 2022-03-04
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this technical scheme, the production equipment of the full continuous ultra-short electric arc furnace steelmaking process is an integral equipment, and each single equipment forms a unified production whole through rigid connection, thereby ensuring the airtightness of the equipment and the stable operation of the system. When the refining equipment is used as a single When the overall equipment is matched with the traditional primary furnace (including converter, electric furnace, etc.)

Method used

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  • A continuous online refining equipment and production process for molten steel
  • A continuous online refining equipment and production process for molten steel
  • A continuous online refining equipment and production process for molten steel

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Experimental program
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Embodiment 1

[0030] In this embodiment, the process of the present invention is applied to the implementation of a continuous on-line molten steel refining equipment with a nominal capacity of 150t for smelting and production. This equipment is matched with a 100t converter and a set of 2 machines, 2 streams, 200×200mm billet continuous Casting machine:

[0031] The specific process is:

[0032] Use the ladle to transfer the primary molten steel from the converter station to the refining station, add the molten steel from the ladle to the online continuous refining equipment through the feeding port 202, add alloys and deoxidizers to the refining section 101 through the channel 203, and refine The slag forms slag, and the refining bed body 1 is tilted, so that the liquid slag is discharged through the slag outlet hole 103, realizing the counterflow of slag steel, performing deoxidation, desulfurization and alloying of molten steel, passing through the induction coil 108 and / or the DC elect...

Embodiment 2

[0037] In this embodiment, the process of the present invention is applied to the implementation of a continuous online refining equipment with a nominal capacity of 120t molten steel for smelting production. This equipment is matched with two 70t electric arc furnaces and one set of three machines and three streams of 200×200mm square billet Continuous casting machine:

[0038] The specific process is:

[0039] Use the ladle to transfer the initial molten steel from the electric arc furnace station to the refining station, add the molten steel from the ladle to the online continuous refining equipment through the feeding port 202, add alloys and deoxidizers to the refining section 101 through the channel 203, Refining slag forms slag, and the refining bed body 1 is tilted so that the liquid slag is discharged through the slag outlet hole 103 to realize the counterflow of slag steel, deoxidize, desulfurize and alloy the molten steel, and the steel is energized by the induction...

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Abstract

The invention discloses continuous on-line refining equipment and a production process for molten steel, which belong to the technical field of iron and steel refining. This device includes four parts: refining bed body, refining bed cover, air extraction and dust removal system, and hydraulic tilting system, which can realize slag steel counterflow, realize micro positive pressure inside the equipment, avoid air infiltration, ensure a reducing environment inside the equipment, and form a good environment. Refining reaction conditions, dynamically adjust the smelting process according to the production status, to ensure that the final molten steel reaches the appropriate composition temperature. The device can be directly connected with the continuous casting system to realize the integrated operation of the refining process and the continuous casting process, realize the close connection and flow matching of the steelmaking process, the refining process and the continuous casting process, and improve the continuity and compactness of the steel production process , avoiding the temperature drop and oxygen and nitrogen increase of molten steel produced in the process of transportation and repacking. Using the device to match the steelmaking process and the continuous casting process can achieve continuous production of more than 80 hours, and increase the output by more than 10% compared with the traditional process.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to continuous on-line refining equipment and a production process for molten steel. Background technique [0002] At present, various technologies such as alloy deoxidation, electrode heating, white slag refining, bottom blowing and stirring are applied in the molten steel refining process to achieve the requirements of molten steel deoxidation, desulfurization, temperature rise, alloying, removal of inclusions, and uniform temperature composition. At the same time, with the advancement of steel production technology, the production cycle of primary furnaces (including converters, electric furnaces, etc.) has been continuously shortened, and the casting speed of continuous casting machines has been continuously increased. However, due to the limitation of dynamic conditions in the traditional ladle refining furnace (LF), the contact area of ​​steel slag is small, the desulfuriza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C21C7/064C21C7/00B22D11/116B22D11/117B22D11/16
CPCC21C7/06C21C7/064C21C7/0006C21C7/0087B22D11/116B22D11/117B22D11/16Y02P10/20
Inventor 朱荣田博涵魏光升董凯张宇航王美晨李欣刘润藻姜娟娟
Owner UNIV OF SCI & TECH BEIJING