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

Process method for preventing rising during slab continuous casting and final casting

A process method and slab continuous casting technology, which is applied in the field of slab continuous casting, can solve problems such as poor inflation control effect, and achieve the effects of improving continuous casting operation rate, reducing extrusion, and reducing equipment maintenance losses

Pending Publication Date: 2022-05-27
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention proposes a slab continuous casting final pouring anti-swelling process, which solves the problem of the existing slab continuous casting final pouring anti-swelling process for emergency, long-term low-speed casting, etc. The problem of poor inflation control caused by

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
  • Process method for preventing rising during slab continuous casting and final casting
  • Process method for preventing rising during slab continuous casting and final casting
  • Process method for preventing rising during slab continuous casting and final casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A process method for preventing swell in slab continuous casting final casting, the process method steps are as follows:

[0070] S1. Calculate the thickness of the solidified shell based on the calculation formula of the solidified shell;

[0071] S2. Calculate based on the rapid deceleration, and calculate the maximum section for the volume of the front and rear shells that cannot shrink in time with the maximum section of the steel type, the normal maximum casting speed and the rapid deceleration pull-out speed;

[0072] S3, calculate the maximum cross-sectional value based on the volume of the front and rear shells calculated in the above step S2 that cannot shrink in time, and calculate the volume of the cavity;

[0073] S4. Calculate the required roll gap opening value based on the volume of the cavity calculated in the above step S3, combined with the volume of the mold that is too late to shrink, the maximum width of the casting machine and the length of the seg...

Embodiment 2

[0090] A process method for preventing rising of final casting of slab continuous casting. The roll gap of the 2300mm continuous casting sector of the casting machine is determined:

[0091] In the process of abnormal pulling and pulling, the amount of molten steel that is too late to shrink due to the rapid deceleration is the largest, and the anti-swelling process method needs to cover various abnormal pulling and pulling situations. Therefore, the rapid deceleration is used as an example for calculation. When the steel grades are different in pulling speed, the rapid deceleration is calculated due to various reasons. The main reason is that the cavity opened by the sector must carry the volume of molten steel in the mold that cannot shrink before and after the rapid deceleration.

[0092] When casting high carbon steel, the maximum cross-section is 2300mm, the normal maximum casting speed is 1.2m / min, the pulling speed is 0.4m / min at rapid deceleration, and the volume of the...

Embodiment 3

[0119] A process method for preventing swell in the final casting of slab continuous casting, the roll gap of the 2150mm and 1650mm continuous casting sectors of the casting machine is determined:

[0120] When calculating 2150mm and 1650mm continuous casting and pouring different steel grades, calculating the volume before and after the rapid deceleration is too late to shrink. are consistent, so the calculation results are as follows:

[0121] When casting high carbon steel, the maximum section is 2150mm, the normal maximum casting speed is 1.2m / min, the pulling speed is 0.4m / min at a rapid deceleration, and the volume of the front and rear shells before and after shrinkage is too late to calculate the maximum section V = the maximum section of the casting machine × crystal The height of the device × (the thickness of the billet shell at the pulling and drawing speed after the rapid deceleration - the thickness of the billet shell at the normal maximum drawing speed)

[012...

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 slab continuous casting final casting rising prevention process method, relates to the technical field of slab continuous casting, and provides the following scheme aiming at the problem that an existing slab continuous casting final casting rising prevention process method is poor in rising control effect caused by abnormal drawing such as emergency and long-time low-pulling-speed casting. The technological method comprises the following steps that S1, the thickness of a solidified blank shell is calculated; s2, calculating the maximum section of the volume, which is not shrunk in time, of the front and rear blank shells; s3, calculating the volume of the cavity; s4, calculating a required roll gap opening value; and S5, based on the required roll gap opening value calculated in the step S4, the roll gap of the arc-shaped section with the corresponding value is opened, so that molten steel which is not shrunk in time in the crystallizer flows downwards, and rising prevention is carried out. According to the slab continuous casting final casting rising prevention process method, through analysis and calculation, the mode of adjusting the roll gaps of individual fan-shaped sections is adopted in a targeted mode, and the rising frequency is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of slab continuous casting, in particular to a process method for preventing rising of final pouring of slab continuous casting. Background technique [0002] During the normal casting process, the casting billet undergoes phase transformation shrinkage in the liquid phase area, two-phase area and solid phase area. This shrinkage amount is fully supplemented by the molten steel in the liquid phase area, and the entire shrinkage process maintains a dynamic balance. After drawing, the billet is not supplemented by molten steel and heat, and the billet shrinks continuously, and the dynamic balance is broken. The liquid steel level gradually decreases. With the continuous cooling of the casting billet, the liquid molten steel shrinks downward, causing the surrounding billet shell to be exposed due to the loss of the support of the internal molten steel. At this time, the thermal expansion caused by the temperatu...

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 Applications(China)
IPC IPC(8): B22D11/20
CPCB22D11/207
Inventor 郭世琛冯长宝胡娇
Owner BAOSTEEL ZHANJIANG IRON & 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