Multifunctional oxyhydrogen burner for electric arc furnace steelmaking and energy supply control method

Abstract

The invention discloses a multifunctional oxyhydrogen burner for electric arc furnace steelmaking and an energy supply control method, and belongs to the technical field of steelmaking. The energy supply control method is characterized in that hydrogen serves as gas, in the smelting process, the working mode of the oxyhydrogen burner is dynamically adjusted in real time according to the situationin a furnace, scramjet flames generated by hydrogen combustion are utilized, and a high-temperature thin gas sealing sleeve with the controllable temperature and thickness is formed, so that the actual requirements of different smelting periods are met. The oxyhydrogen burner adopts a mode that a single-layer / multi-layer circular seam sleeve surrounds a main oxygen spray pipe, and the outlet positions of the main oxygen spray pipe and the circular seam sleeve are of contraction section-expansion section structures; and in the smelting process, the working mode of the oxyhydrogen burner is dynamically adjusted in real time according to the furnace condition, wherein the working mode comprises a burner mode, a dephosphorization mode, a decarburization mode and a protection mode. According tothe multifunctional oxyhydrogen burner for electric arc furnace steelmaking and the energy supply control method, the hydrogen serves as the gas, the high-temperature thin gas sealing sleeve with thick thickness is generated through combustion, so that the area of a main oxygen jet core section is increased, the impact depth of a molten pool is increased, the stirring effect of the molten pool isenhanced, carbon emission of electric arc furnace smelting is reduced, and cleanness and environmental protection are achieved; and smelting parameters can be monitored in real time, and the workingmode is adjusted, so that production is flexible, safe and reliable.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and an energy supply control method. Background technique [0002] The principle of the electric arc furnace cluster jet is to increase the gas jet around the Laval nozzle, so that the oxygen jet of the Laval nozzle is surrounded by high-temperature and low-density media, reducing the influence of various air flows in the electric furnace on the central oxygen jet, thereby slowing down the oxygen jet. The attenuation of the velocity maintains the initial diameter and velocity of the oxygen jet over a longer distance, and can provide a supersonic cluster jet for a longer distance to the molten pool. [0003] At present, the cluster jet oxygen lances of electric arc furnaces use methane as fuel gas, and meet the metallurgical task requirements of electric arc furnaces in different smelting periods by adjusting t...

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Problems solved by technology

[0005] Patent CN201610496319 proposes an electric arc furnace steelmaking cluster oxygen supply method with variable calorific value gas, which uses converter gas, blast furnace gas and other low calorific value gas or nitrogen and other cheap inert gases produced by iron and steel enterprises to change the calorific value of gas. Adjust the calorific value and flow rate of gas to achieve the purpose of reducing the consumption of high calorific value gas and saving the cost of electric arc furnace smelting, but it will still generate carbon emissions, which is not conducive to the realization of green and low-carbon production of electric arc furnace

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