Check patentability & draft patents in minutes with Patsnap Eureka AI!

A method of deoxidation in rh vacuum furnace

A vacuum furnace and vacuum treatment technology, used in the production of low carbon aluminum killed steel and ultra-low carbon steel, deoxidized in RH vacuum furnace, and in the field of deoxidation in RH vacuum furnace, to reduce production costs, improve purity, and reduce molten steel The effect of oxygen content

Active Publication Date: 2016-01-20
武汉钢铁有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even if the carbon content in molten steel is used for deoxidation under vacuum conditions, the excess oxygen content before alloying is still high and cannot meet the 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 1

[0031] A method of deoxidation in RH vacuum furnace, its steps:

[0032] 1) After smelting by converter, the molten steel directly enters the RH vacuum furnace for vacuum treatment, and the tapping temperature is increased by 10°C compared with the conventional tapping temperature.

[0033] ) Add carburant to the RH vacuum furnace for deoxidation: the vacuum degree in the furnace is 5KPa; 6 minutes before the start of vacuum treatment, all the carburant to be added has been added; the temperature drop of carburant deoxidation is 3°C per minute; the amount of carburant added is calculated according to the following formula: Known: T0=1622°C, T rise=13°C, T fall=35°C, T target=1590°C, O arrival=610ppm,

[0034] O before alloying = 230ppm, C arrival = 355ppm into the following formulas respectively,

[0035] m=(T0+T liter-T drop-T target)×0.02kg / t or

[0036] m=[(O to station-O before alloying+200)÷133-C to station]×0.0012kg / t

[0037] After calculation, under 20...

Embodiment 2

[0042] A method of deoxidation in RH vacuum furnace, its steps:

[0043] 1) After being smelted in the converter, the molten steel directly enters the RH vacuum furnace for vacuum treatment, and the tapping temperature is increased by 15°C compared with the conventional tapping temperature;

[0044] 2) Add carburant in the RH vacuum furnace for deoxidation: the vacuum degree in the furnace is 6KPa; 6 minutes before the start of vacuum treatment, all the carburant to be added has been added; the temperature drop of carburant deoxidation is 4kg / °C meter; the amount of carburant added is calculated according to the following formula: Known: T0=1627°C, T rise=17.5°C, T drop=35°C, T target=1590°C, O arrival=720ppm,

[0045] O before alloying = 230ppm, C arrival = 305ppm into the following formulas respectively,

[0046] m=(T0+T liter-T drop-T target)×0.02kg / t or

[0047] m=[(O to station-O before alloying+200)÷133-C to station]×0.0012kg / t

[0048] After calculatio...

Embodiment 3

[0053] A method of deoxidation in RH vacuum furnace, its steps:

[0054] 1) After being smelted in the converter, the molten steel directly enters the RH vacuum furnace for vacuum treatment, and the tapping temperature is increased by 12°C compared with the conventional tapping temperature;

[0055] 2) Add carburant in the RH vacuum furnace for deoxidation: the vacuum degree in the furnace is 6KPa; 6 minutes before the start of vacuum treatment, all the carburant to be added has been added; the temperature drop of carburant deoxidation is 4kg / °C meter; the amount of carburant added is calculated according to the following formula: Known: T0=1625°C, T rise=17°C, T drop=35°C, T target=1590°C, O arrival=690ppm,

[0056] O before alloying = 230ppm, C arrival = 300ppm into the following formulas respectively,

[0057] m=(T0+T liter-T drop-T target)×0.02kg / t or

[0058] m=[(O to station-O before alloying+200)÷133-C to station]×0.0012kg / t

[0059] After calculation,...

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 method of deoxidation in RH vacuum furnace: after converter smelting, molten steel directly enters RH vacuum furnace for treatment; adding carburant to the vacuum furnace for deoxidation: the amount of carburant is added according to: m=(T0+T liter-T drop -T target)×0.02kg / ton of steel or m=[(O to station-O before alloying+200)÷1.33-C to station]×0.0012kg / t calculation, both formulas are calculated, and finally the result is taken The smallest value is the addition amount; when the calculated m value does not exceed 20kg, it will be added at one time; when the m value exceeds 20kg, it will be added in batches, the maximum amount of each batch is 20kg, and the time interval between additions is not low Add in 10 seconds and complete within 6 minutes; carry out the post-processing according to the routine. In the present invention, adding the recarburizing agent under vacuum conditions will not cause violent reaction explosion, so as to realize the reaction between the recarburizing agent and the oxygen in molten steel, reduce the oxygen content before alloying of molten steel, improve the purity of molten steel, and reduce the consumption of aluminum shot to below 1.1kg / ton of steel.

Description

technical field [0001] The invention relates to a method for removing harmful elements in molten steel smelting, in particular to a method for deoxidizing in an RH vacuum furnace, and is especially suitable for deoxidizing in an RH vacuum furnace when producing low-carbon aluminum-killed steel and ultra-low-carbon steel method. Background technique [0002] When the converter produces low-carbon aluminum-killed steel and ultra-low carbon steel, the tapping carbon is usually controlled at 0.03%~0.06%, and the oxygen content corresponding to tapping is generally 400~800ppm, and the tapping oxygen is higher in the case of operating errors. In the process mode without pre-deoxidation for tapping, the oxygen content in the vacuum furnace is usually greater than 400ppm. Under the traditional RH vacuum refining process, the carbon-oxygen reaction during the vacuum cycle can obtain a lower carbon content level, but the oxygen content of the molten steel with high oxygen content ...

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): C21C7/06C21C7/10
Inventor 许成英李海洋张春胜杨文军宋泽啓林利平肖汉波沈武邓品团彭长波
Owner 武汉钢铁有限公司
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