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

Argon blowing method on ladle turret and ladle argon blowing turret in continuous casting mode

A technology of turret table and ladle, which is applied in casting equipment, casting melt containers, manufacturing tools, etc., can solve the problems of maintaining the continuity of steelmaking production, improving the oxidation of molten steel, and high consumption of metal materials, so as to ensure the continuity of production, Effects of cost reduction and quality assurance

Active Publication Date: 2020-08-04
德龙钢铁有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the soft blowing time is guaranteed to improve the quality of molten steel (the longer the argon blowing time under a reasonable soft blowing argon gas flow condition, the removal of inclusions in the steel is about complete), after the blowing of the next furnace of molten steel is completed , the last furnace of molten steel has not yet left the station, causing production problems in subsequent tapping and other ladles
Due to the limitation of the argon blowing time of the argon station, the argon blowing process of the argon station usually adopts a combination of hard blowing and soft blowing, which requires a higher tapping temperature of the converter to ensure that the temperature before the argon meets the requirements of the argon blowing time. The steel temperature has caused the disadvantages of increased oxidation of molten steel and high consumption of metal materials
Therefore, in order to improve the quality of molten steel, adopting a longer argon blowing time and maintaining the continuity of steelmaking production have become a pair of insoluble contradictions

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
  • Argon blowing method on ladle turret and ladle argon blowing turret in continuous casting mode
  • Argon blowing method on ladle turret and ladle argon blowing turret in continuous casting mode
  • Argon blowing method on ladle turret and ladle argon blowing turret in continuous casting mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Taking cold-rolled base material Q195 as the target steel type, furnace number: 81-03033, molten iron temperature 1366°C, molten iron composition: C: 4.59%, Si: 0.36%; Mn: 0.33%; S: 0.023%; P: 0.102%, the oxygen supply time is 13 minutes and 32 seconds. Steel core aluminum and silicon-manganese alloy are used for tapping and alloying (the Al purity in the steel core aluminum is >99%, and the Al content is 70%; the Mn content of the silicon-manganese alloy is 66%).

[0032] The temperature measurement at the end point of the converter molten steel is 1629°C, and the sampling composition at the end point is: C: 0.042%, Mn: 0.10%, S: 0.016%, P: 0.015%. The composition and temperature at the end point are suitable. Once the steel is poured out, 350Kg of steel core aluminum and 230Kg of silicon-manganese alloy are added through the high-level silo when the steel is tapped for 1 / 2. When the steel is tapped, the ladle is turned on with argon gas throughout the process, and the...

Embodiment 2

[0036] The target steel grade is cold rolling base material Q195L, furnace number: 82-03093, molten iron temperature 1385°C, molten iron composition: C: 4.55%, Si: 0.34%; Mn: 0.32%; S: 0.020%; P: 0.115%, the oxygen supply time is 13 minutes and 16 seconds. Steel core aluminum and silicon-manganese alloy are used for tapping and alloying (the Al purity in the steel core aluminum is >99%, and the Al content is 70%; the Mn content of the silicon-manganese alloy is 66%).

[0037] The temperature measurement at the end point of the converter molten steel is 1628°C, and the sampling composition at the end point is: C: 0.041%, Mn: 0.09%, S: 0.015%, P: 0.017%. The composition and temperature at the end point are appropriate. Once the steel is poured out, 365Kg of steel core aluminum and 240Kg of silicon-manganese alloy are added through the high-level silo when the steel is tapped for 1 / 2. When the steel is tapped, the ladle is turned on with argon gas throughout the process, and the...

Embodiment 3

[0042] Taking cold-rolled base material SPHC as the target steel type, furnace number: 81-03196, molten iron temperature 1380°C, molten iron composition: C: 4.57%, Si: 0.36%; Mn: 0.30%; S: 0.021%; P: 0.105%, the oxygen supply time is 12 minutes and 57 seconds. Steel core aluminum and medium carbon ferromanganese alloy are used for tapping and alloying (the Al purity in the steel core aluminum is >99%, and the Al content is 70%; the medium carbon ferromanganese Mn content is 74%).

[0043] The temperature measurement at the end point of the converter molten steel is 1625°C, and the sampling composition at the end point is: C: 0.038%, Mn: 0.08%, S: 0.017%, P: 0.015%. The composition and temperature at the end point are suitable. Once the steel is poured out, 386Kg of steel core aluminum and 270Kg of medium carbon ferromanganese are added through the high-level silo when the steel is tapped for 1 / 2. When the steel is tapped, the ladle is turned on with argon gas throughout the p...

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 for blowing argon on a ladle turret in continuous casting mode and argon blowing on a ladle turret, said method comprising the following steps: a, tapping molten steel: the temperature of molten steel tapping in the converter process is controlled between 1620-1630°C; b . Argon station fixed oxygen feeding aluminum wire: the ladle is moved to the argon station, and the temperature of the molten steel before the argon is controlled between 1600‑1610 °C; c. Stirring at the argon station: the molten steel is stirred at the argon station for 3‑4 minutes after the oxygen is fixed and the line is fed. The exit temperature is controlled between 1595-1600°C; d. Ladle argon blowing: it will be hoisted to the continuous casting machine ladle blowing argon turntable, the bottom blowing pipe of the ladle is fed with argon, and the argon blowing is turned on, and the time of soft argon blowing is controlled In 15‑20min. The method of the invention moves the argon blowing process of the ladle to the continuous casting rotary table for implementation, and solves the contradictory problem between the argon blowing time of molten steel and the production rhythm. While ensuring the continuity of production, the purity of molten steel and the yield of alloys are improved, ensuring that the purity of molten steel meets the quality.

Description

technical field [0001] The invention relates to a steelmaking technology, in particular to a method for controlling argon blowing at the bottom of a ladle on a rotary table in a continuous casting mode. Background technique [0002] At present, in the process of steelmaking production, the slag washing process has gradually replaced the refining process as the most convenient means of refining to obtain clean steel. In order to ensure the purity, uniformity of temperature and composition of the molten steel directly on the slag washing, when performing this process, the molten steel starts to blow argon after adjusting the composition and temperature. Generally, the argon blowing time of the molten steel at the argon station should be controlled between 10-12min, otherwise There will be an impact on production continuity. In some cases, the soft blowing time is guaranteed to improve the quality of molten steel (the longer the argon blowing time under a reasonable soft blowi...

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): B22D11/117B22D41/13C21C7/06C21C7/068C22C38/02C22C38/04C22C38/06C21C7/00
CPCB22D11/117B22D41/13C21C7/0006C21C7/0056C21C7/06C21C7/068C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 李兴才霍立桥田宝生胥俊超徐子谦马军强屈芙渠赵伟锋武献民刘建刚王鹏
Owner 德龙钢铁有限公司
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