Coherent jet oxygen blowing method for electric furnace steel making

An electric furnace steelmaking and jet technology, applied in the field of oxygen blowing in steelmaking, can solve the problems of damage to the burner, strengthen the stirring of the molten pool, etc., and achieve the effects of reducing power consumption, strengthening the oxygen-enriching operation, and enhancing the dephosphorization effect.

Inactive Publication Date: 2010-03-31
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

[0004] The invention provides a polymerization jet oxygen blowing method for electric furnace steelmaking, through the combination of equipment and process improvement, it effectively solves the problem of burner damage during the oxygen blowing process of electric furnace steelmaking, and strengthens the stirring of the molten pool

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  • Coherent jet oxygen blowing method for electric furnace steel making

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Embodiment Construction

[0015] Electric furnace steelmaking polymerization jet oxygen blowing method, including selection of polymerization jet oxygen blowing device and polymerization jet oxygen blowing process conditions, such as figure 1 , figure 2 As shown, the polymerization jet oxygen blowing device is composed of three parts: the main oxygen injection system 1, the auxiliary oxygen injection system 3, and the gas injection system 2. The main oxygen injection system is located in the center of the polymerization jet oxygen blowing device; the gas injection system is located on the outer layer of the main oxygen injection system; the auxiliary oxygen injection system is located on the outer layer of the gas injection system. The nozzle structure of the polymerization jet oxygen blowing device is composed of one main oxygen injection hole 4, sixteen gas injection holes 5 and sixteen auxiliary oxygen injection holes 6. Gas injection holes and auxiliary oxygen injection holes are arranged alterna...

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Abstract

The invention discloses a coherent jet oxygen blowing method for electric furnace steel making, effectively solving the problem of burner damage in the oxygen blowing process of electric furnace steelmaking and enhancing the stirring to a weld pool through the combination of equipment and process improvement. The coherent jet oxygen blowing method for electric furnace steel making comprises the following step: selecting a coherent jet oxygen blowing device and process conditions, wherein the device consists of a primary oxygen spraying and blowing system, a secondary oxygen spraying and blowing system and a fuel gas spraying and blowing system. A primary oxygen spraying hole has a pressure regulation range of 0.8-1.2MPa and an oxygen flow range of 10,000-60,000Nm<3>/h; a secondary oxygenspraying hole has a pressure regulation range of 0.12-0.8MPa and an oxygen flow range of 2,000-10,000Nm<3>/h; and a fuel gas spraying hole has a pressure regulation range of 0.12-0.2MPa, an outlet Mach number of 0.5-1.0 and a fuel gas flow range of 100-2000Nm<3>/h. The invention not only solves the problem of burner damage, but also has important meaning for improving the adaptability of waste steel quality and the internal quality of steel products.

Description

technical field [0001] The invention relates to a steelmaking oxygen blowing method, in particular to a polymerization jet oxygen blowing method applied to electric furnace steelmaking. Background technique [0002] At present, electric furnace steelmaking is mainly based on inserting iron pipes into the furnace door to blow oxygen, the oxygen supply intensity is low, and the labor intensity of workers is high. After improvement, the oxygen lance burner can be installed on the furnace wall, but because the burner flame is short and the installation position is low, metal and slag will splash on the burner during blowing. During the process of foaming slag, the molten slag can also rise to a height sufficient to pour into the burner, causing damage to the burner. In addition, the existing electric furnace oxygen blowing method has a poor stirring effect on the molten pool, which affects the cost of electric furnace steelmaking and the quality of steel. [0003] There have b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCY02P10/20
Inventor 刘坤吕英华库文建高茵
Owner UNIV OF SCI & TECH LIAONING
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