Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for purifying molten steel at the end of ladle in continuous pouring process

A molten steel and tail stage technology, applied in the field of continuous casting of iron and steel metallurgy, can solve the problems of loss, tailing steel and steel slag contaminating the molten steel in the tundish, and not using it as a genuine product, so as to avoid waste, improve metal yield, and improve the efficiency of metallurgy. Strong implementation effect

Active Publication Date: 2020-06-19
武汉钢铁有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) The tail steel is allowed to enter the tundish, but the cast slabs produced during the period need to be downgraded and not used as genuine products
[0009] In method (2), allowing the tail steel to enter the tundish will cause the tail steel and steel slag to pollute the molten steel in the tundish, and the slabs produced during this period will be downgraded, which will also cause losses

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 purifying molten steel at the end of ladle in continuous pouring process
  • A method for purifying molten steel at the end of ladle in continuous pouring process
  • A method for purifying molten steel at the end of ladle in continuous pouring process

Examples

Experimental program
Comparison scheme
Effect test

specific example

[0046] Aiming at a double-strand continuous casting tundish with a nominal capacity of 60t and a working fluid level of 1.2m, the casting slab section is 1250*230mm, and the drawing speed is 1m / min. Using physical simulation, the continuous casting process is measured. The minimum liquid level of anti-tail steel entering the tundish is 0.8m, then L min Is 0.8m, L max It is 1.2m.

[0047] In the production process, after the previous ladle is poured, the tail steel enters the tundish, and then the ladle slide plate is closed, and the ladle turret will change the empty ladle to a full ladle. At this time, the pulling speed is maintained at 1m / min, Q out At 2.0t / min, the liquid level in the tundish keeps decreasing. When the tundish level is close to L min That is, at 0.8m, the new ladle starts to be cast, and molten steel is injected into the tundish, Q in 12.0t / min, after 3min, the tundish reaches 60t and the tundish level reaches L max To 1.2m, reduce the ladle flow rate to 2...

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 method for purifying final molten steel in a steel ladle in the continuous casting process. According to the method, inclusions in the final molten steel are captured througha tundish slag layer by rapidly increasing the liquid level and slowly decreasing the liquid level; and meanwhile, the motility of the inclusions is improved to improve aggregation of small inclusions and to promote the inclusions to float upwards, so that the final molten steel is purified. By adoption of the method, the inclusions in tail steel in a big ladle can be effectively purified, and thus, the metal loss in the continuous casting process is avoided.

Description

Technical field [0001] The invention belongs to the technical field of steel metallurgy continuous casting technology, and specifically relates to a method for purifying molten steel at the end of a ladle in a continuous casting process. Background technique [0002] With the continuous improvement of users' requirements for steel quality, smelting clean steel with small inclusion sizes, uniform distribution, and no harm to steel performance has become the focus of steelmaking science and technology research. The continuous casting tundish is a transition container between the ladle and the mold, which has the function of stabilizing the steel flow, promoting the floating of non-metallic inclusions in the steel and realizing the effect of multiple furnace continuous casting. [0003] Tundish continuous pouring refers to the process of continuous pouring after the previous furnace of molten steel is poured and the ladle is replaced. Because clean steel has strict requirements on th...

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): B22D11/18
CPCB22D11/18
Inventor 张剑君彭著刚吴杰陈子宏蒋跃东
Owner 武汉钢铁有限公司