Supercharge Your Innovation With Domain-Expert AI Agents!

A method for increasing oxygen in rh refining process

A refining process and oxygenating agent technology, applied in the metallurgical field, can solve problems such as unstable oxygen absorption rate, and achieve the effects of reducing industrial costs, eliminating influence and improving absorption rate

Active Publication Date: 2018-11-02
BEIJING SHOUGANG CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the instability of the oxygen absorption rate caused by the method of blowing oxygen into the molten steel in the prior art when there is no surplus in temperature in the prior art by providing an oxygen increasing method in the RH refining process, and the problem of the RH arrival temperature For very high furnace times, the technical problem of adding scrap steel to cool down after oxygen blowing improves the oxygen absorption rate during oxygenation, and at the same time realizes the cooling of the RH furnace, reducing industrial costs

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 method for increasing oxygen in rh refining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for increasing oxygen in the RH refining process:

[0039] ΔT1 is the temperature drop related to time, taking a value of 8°C; ΔT2 is the temperature drop caused by adding alloys, taking a value of 7°C; ΔT3 is the temperature rise caused by deoxidation, taking a value of 10°C; ΔT4 is the temperature drop caused by other factors, The value is 2°C. When the RH arrives at the station, use the temperature surplus calculation formula ΔT=ΔT1+ΔT2-ΔT3+ΔT4 to calculate the difference between the arrival temperature and the end temperature ΔT is equal to 7°C. Since ΔT>5°C, it means that there is a surplus in temperature. Further, judge the oxygen activity a[O] of the oxygen determination result, the oxygen activity a[O] takes a value of 250, the RH arrival carbon content-target carbon content △C takes a value of 10, and the oxygen activity a[O] >△C×4 / 3+220, add an oxygenating agent to increase oxygen and perform forced decarburization. Every 10...

Embodiment 2

[0041] This embodiment provides a method for increasing oxygen in the RH refining process:

[0042] ΔT1 is the temperature drop related to time, taking a value of 2°C; ΔT2 is the temperature drop caused by adding alloys, taking a value of 5°C; ΔT3 is the temperature rise caused by deoxidation, taking a value of 8°C; ΔT4 is the temperature drop caused by other factors, The value is 2°C. When the RH arrives at the station, use the temperature surplus calculation formula ΔT=ΔT1+ΔT2-ΔT3+ΔT4 to calculate the difference between the arrival temperature and the end temperature ΔT is equal to 1°C, since ΔT<5°C, it means that there is no surplus in temperature, and the RH top gun is used Oxygenation is carried out by blowing oxygen.

Embodiment 3

[0044] This embodiment provides a method for increasing oxygen in the RH refining process:

[0045] ΔT1 is the temperature drop related to time, taking a value of 5°C; ΔT2 is the temperature drop caused by adding alloys, taking a value of 6°C; ΔT3 is the temperature rise caused by deoxidation, taking a value of 6°C; ΔT4 is the temperature drop caused by other factors, The value is 4°C. When the RH arrives at the station, use the temperature surplus calculation formula ΔT=ΔT1+ΔT2-ΔT3+ΔT4 to calculate the difference between the arrival temperature and the end temperature ΔT is equal to 9°C. Since ΔT>5°C, it means that there is a surplus in temperature. Further, judge the oxygen activity a[O] of the oxygen determination result, the value of oxygen activity a[O] is 200, the value of RH arrival carbon content-target carbon content △C is 20, and the oxygen activity △C×4 / 3+220 is 246.7, a[O]<△C×4 / 3+220, then natural decarburization is adopted.

[0046] One or more technical soluti...

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 relates to the technical field of metallurgy, particularly relates to an oxygenation method in an RH refining process. The method includes performing temperature surplus calculation during an RH arrival, oxygenating in a manner of blowing oxygen through an RH top gun when no temperature surplus exits, judging oxygen activity a[O] of an oxygen determination result when a temperature surplus exits, performing natural decarburization when the oxygen activity a[O] meets a decarburization condition of a carbon oxygen relationship, and when the oxygen activity a[O] cannot meet the carbon oxygen relationship, performing forced decarburization by adding a solid oxygenating agent to perform oxygenation. According to the method, natural decarburization is performed when the oxygen activity a[O] meets the decarburization condition of the carbon oxygen relationship, and forced decarburization is performed by adding the solid oxygenating agent to perform oxygenation when the oxygen activity a[O] cannot meet the carbon oxygen relationship. When the oxygen activity a[O] cannot meet the carbon oxygen relationship, the solid oxygenating agent is added to perform oxygenation, thus eliminating influences of oxygen on refractories in a vacuum chamber and increasing the oxygen absorptivity during oxygenation.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an oxygen increasing method in the RH refining process. Background technique [0002] For a long time, when RH smelts low-carbon and ultra-low-carbon steels, when the C content at the RH station is high and the free oxygen is insufficient, the method of blowing oxygen into the molten steel is usually used to increase oxygen to ensure a good decarburization effect. When there is no surplus in temperature, the method of blowing oxygen into the molten steel by top grabbing has a certain impact on the refractory materials of the vacuum chamber, and the oxygen absorption rate is unstable due to factors such as vacuum degree, especially when the RH arrives at the station with a high temperature. , After oxygen blowing, steel scrap is added to cool down, resulting in a great waste of cost. Contents of the invention [0003] The present invention solves the instability of the oxyge...

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): C21C7/10C21C7/068
CPCC21C7/068C21C7/10
Inventor 王佳力彭开玉解雷韩凯峰高占晓王建辉
Owner BEIJING SHOUGANG CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com