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Oxygen blowing apparatus for smelting steel, technology and application

A technology of equipment and process, which is applied in the direction of lighting and heating equipment, improvement of process efficiency, furnace components, etc., can solve the problems of short jet injection distance, weak impact force, dispersion, etc., to improve utilization efficiency, reduce gas concentration, Strong penetrating effect

Inactive Publication Date: 2002-11-13
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0002] At present, ordinary supersonic jets are usually used for blowing oxygen on the furnace wall of electric furnace steelmaking. Due to the rapid attenuation of the speed of supersonic jets, the jet injection distance is short and relatively scattered. When the jet reaches the molten pool, the speed is already low and the impact force is weak. It cannot penetrate the surface of the molten pool for effective decarburization reaction, the effective use rate of oxygen is low, and it cannot cut scrap iron and steel for melting

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  • Oxygen blowing apparatus for smelting steel, technology and application
  • Oxygen blowing apparatus for smelting steel, technology and application

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Embodiment Construction

[0008] The equipment of the present invention is composed of four parts: a main oxygen injection system, a secondary oxygen injection system, a fuel injection system and a water cooling system. The main oxygen injection system is located in the center of the cluster jet oxygen lance; the main oxygen protection system is located in the outer layer of the main oxygen injection system, with gas (oil) and secondary oxygen injection; the water cooling system is located in the outermost layer of the spray gun, in the One end of the oxygen lance is provided with water inlet and outlet.

[0009] The present invention designs a cluster jet oxygen lance, the outlet diameter of the oxygen lance is 25.98mm, the throat diameter is 20mm, the length of the oxygen lance is 1000mm, the oxygen lance is inserted into the center of the electric arc furnace, the outer diameter of the main oxygen pipe is 45mm, and the auxiliary The outer diameter of the oxygen pipe is 70mm, the outer diameter of th...

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Abstract

A concentrated oxygen jet gun for smelting steel in electric furnace features that its primary oxygen jet channel has its outer layer surrounded by a protecting system composed of fuel spray pipe, and the said protecting system composed of fuel injecting tube, secondary oxygen inlet and fuel inlet nozzle. The concentrated oxygen jet gun is arranged on the furnace wall and blows oxygen at the position 400-1000 mm above the slag line. The gas generated by burning gas or liquid fuel and secondary oxygen is used as protecting gas to keep the original impact force and the speed of primary oxygen at the distance of 800-2000 mm far from the gun. Its advantages are high decarbonizing speed, high utilization rate of oxygen, and the function of helping smelting and secondary combustion of CO.

Description

Technical field: [0001] The invention belongs to the field of steelmaking and is particularly suitable for electric furnace steelmaking. Background technique: [0002] At present, ordinary supersonic jets are usually used for blowing oxygen on the furnace wall of electric furnace steelmaking. Due to the rapid attenuation of the speed of supersonic jets, the jet injection distance is short and relatively scattered. When the jet reaches the molten pool, the speed is already low and the impact force is weak. It cannot penetrate the surface of the molten pool for effective decarburization reaction, the effective use rate of oxygen is low, and it cannot cut scrap iron and steel for melting. Invention content: [0003] A steelmaking oxygen blowing equipment and process, the equipment is a cluster jet oxygen lance, including a main oxygen jet channel 1, a water inlet nozzle 2, a water outlet nozzle 3, a water inlet pipe 4, a water outlet pipe 5, and an oxygen nozzle 6, and its ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B7/02C21C5/52F27D3/16
CPCY02P10/20
Inventor 朱荣李贵海仇永全刘艳敏李晓强刘广会
Owner UNIV OF SCI & TECH BEIJING
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