A multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and its energy supply control method

A control method and electric arc furnace technology, which are applied in steel manufacturing processes, electric furnaces, furnaces, etc., can solve problems such as being unfavorable for green and low-carbon production of electric arc furnaces, and achieve the effects of reducing emissions, flexible production, and increasing impact depth.

Active Publication Date: 2021-06-11
UNIV OF SCI & TECH BEIJING
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and its energy supply control method
  • A multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and its energy supply control method
  • A multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and its energy supply control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 2-3 As shown, the present invention implements a single-layer circular seam hydrogen-oxygen burner, the outer wall of the burner body is provided with the water-cooled holster, and the outlet of the main oxygen nozzle adopts a contraction section-expansion section design, A supersonic jet flow can be realized, and a hydrogen annular sleeve for forming a hydrogen accompanying flow is provided on the outside of the main oxygen nozzle. Further, the outlet of the hydrogen annular sleeve adopts a contraction section-expansion section design;

[0037] Further, the Mach number at the outlet of the main oxygen nozzle is 1.7, and the design flow rate of the main oxygen is 2000Nm 3 / h, the pressure is 0.8Mpa; the Mach number of the outlet of the hydrogen annular casing is 1.5, and the design flow rate of the hydrogen accompanying flow is 1200Nm 3 / h, the pressure is 1.2MPa;

[0038] The embodiment of the present invention is applied to a 70t steelmaking electric...

Embodiment 2

[0050] Such as Figure 5-6 As shown, a hydrogen-oxygen burner with two layers of annular seams is implemented in the present invention. The outer wall of the burner body is provided with the water-cooled lance sleeve, and the outlet of the main oxygen nozzle adopts a contraction section-expansion section design, The main oxygen nozzle that can realize supersonic jet flow, the outside of the main oxygen nozzle is provided with 2 layers of hydrogen annular seam casing and oxygen annular seam casing for forming hydrogen accompanying flow and oxygen accompanying flow; further, The hydrogen annular seam casing and the oxygen annular seam casing are alternately arranged around the main oxygen nozzle, from inside to outside, the first layer is the hydrogen annular seam casing, and the second layer is the oxygen annular seam Sleeve, further, the outlet of the hydrogen annular sleeve and the outlet of the oxygen annular sleeve adopts a contraction section-expansion section design.

[...

Embodiment 3

[0064] Such as Figure 8-9 As shown, it is a hydrogen-oxygen burner with 4 layers of annular seams implemented in the present invention. The outer wall of the burner body is provided with the water-cooled lance sleeve, and the center of the oxygen lance body is the outlet and adopts a contraction section-expansion section design. , the main oxygen nozzle that can realize supersonic jet flow, the outside of the main oxygen nozzle is provided with 4 layers of hydrogen annular seam casing and oxygen annular seam casing for forming hydrogen accompanying flow and oxygen accompanying flow; further , the hydrogen annular seam casing and the oxygen annular seam casing are alternately arranged around the main oxygen nozzle, from inside to outside, the first and third layers are the hydrogen annular seam casing, and the second and fourth layers are The oxygen ring seam sleeve, further, the outlet of the hydrogen ring seam sleeve and the oxygen ring seam sleeve adopts a contraction secti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A multifunctional hydrogen-oxygen burner for electric arc furnace steelmaking and an energy supply control method belong to the technical field of steelmaking. Using hydrogen as the fuel gas, during the smelting process, the working mode of the hydrogen-oxygen burner is dynamically adjusted in real time according to the situation in the furnace, and the super-combustion flame generated by hydrogen combustion is used to form a high-temperature thin gas envelope with controllable temperature and thickness to meet the needs of different smelting periods Actual demand. The hydrogen-oxygen burner is a single-layer / multi-layer annular seam casing surrounding the main oxygen nozzle, and the outlet positions of the main oxygen nozzle and the annular seam casing are both contracting section-expanding section structure. During the smelting process, the working mode of the hydrogen-oxygen burner is dynamically adjusted in real time according to the furnace conditions: burner mode, dephosphorization mode, decarburization mode, and protection mode. In the present invention, hydrogen is used as fuel gas to generate a high-temperature thin gas envelope with a high thickness, which prolongs the area of ​​the core section of the main oxygen jet, increases the impact depth of the molten pool, strengthens the stirring effect of the molten pool, reduces carbon emissions from electric arc furnace smelting, and is clean and environmentally friendly; Real-time monitoring of smelting parameters, adjustment of working mode, flexible production, 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52
CPCC21C5/52C21C2005/5288C21C2300/06Y02P10/20Y02P10/25
Inventor 朱荣田博涵魏光升董凯朱长富苏荣芳
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap