Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

RH deep decarbonization and clean steel smelting method

A smelting method and technology for cleaning steel, applied in the field of steelmaking and continuous casting, which can solve the problems of rapid hydrogen diffusion, high safety requirements for injection systems, and easy fire and explosion.

Active Publication Date: 2017-01-04
ANGANG STEEL CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrogen is a low-density gas. When the proportion of hydrogen in the air is 13%-59%, it will form an explosive mixed gas. Once hydrogen leaks, hydrogen will spread rapidly and easily cause fire and explosion accidents. Therefore, the entire injection system higher security requirements

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention is further illustrated by some examples below.

[0016] For example, using this technology to produce ultra-low carbon IF steel, the process is carried out in sequence as follows:

[0017] (1) After the molten steel enters the station at the RH station, the weight of the molten steel is 255t, the temperature of the molten steel is 1605°C, the oxygen content of the molten steel is 0.064%, and the carbon content of the molten steel is 0.042%. Afterwards, vacuumize, the lifting gas is argon, and the gas flow rate is 140Nm 3 / h, blowing oxygen 100m in the first 3 minutes of vacuuming 3 .

[0018] (2) Sampling was taken at the 15th minute of RH refining, and the carbon content in the molten steel was detected to be 0.0029%. At this time, the moisture content in the argon gas was detected to be 0.0015% according to the dew point meter, and an industrial humidifier was used to humidify the lifting gas. After humidification The moisture content in the l...

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

The invention discloses a RH deep decarbonization and clean steel smelting method. The RH deep decarbonization and clean steel smelting method comprises following steps: oxygen blowing is finished in 5min of refining; when molten steel carbon content is 0.0030% or lower, water content of a lifting gas is detected, and the lifting gas is subjected to humidification treatment so as to control the water content of the lifting gas to be 10 to 50%, and hydrogen content of molten steel to be 0.0005 to 0.0025%, and then molten steel is subjected to circulation for 15 to 30min; when molten steel carbon content is 0.0010% or lower, humidification treatment of the lifting gas is stopped, a deoxidizing agent is added for deoxidizing of molten steel, and molten steel is subjected to circulation for another 10 to 30min; temperature measuring is carried out; oxygen determination is carried out; hydrogen determination is carried out; and steel tapping is carried out.

Description

technical field [0001] The invention belongs to the technical field of steelmaking-continuous casting, and particularly relates to a RH deep decarburization and clean steel smelting method. Background technique [0002] The RH refining process is the most important of many refining methods outside the furnace. It has a series of advantages such as short processing period, large production capacity, good refining effect, and easy operation. It has been widely used in steelmaking production. At present, RH is the main The function has been changed from the original single degassing equipment to multifunctional refining equipment outside the furnace including vacuum decarburization, oxygen blowing decarburization, powder spraying desulfurization, temperature compensation, uniform temperature and composition, etc. It is used in the production of ultra-low carbon steel, high-quality clean Steel has shown a significant advantage. [0003] At present, the deep decarburization and ...

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
IPC IPC(8): C21C7/10C21C7/068C21C7/06
CPCY02P10/20
Inventor 赵成林廖相巍常桂华张宁黄玉平
Owner ANGANG STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com