Tundish molten steel slag washing, purifying and heating device and usage method

A technology of tundish and molten steel, which is applied in the direction of casting melt containers, manufacturing tools, metal processing equipment, etc., can solve the problems of incomplete removal of inclusions, difficulty in superheat control, etc., to reduce shrinkage cavity and reduce composition Effect of segregation and improvement of cleanliness

Active Publication Date: 2019-07-02
ANGANG STEEL CO LTD
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the current problems such as incomplete removal of inclusions in molten steel in the tundish and difficulty in superheat control, the present invention aims to solve the deficiencies in the existing continuous casting process in the removal of inclusions in molten steel in the tundish and the control of superheat , a tundish molten steel slag cleaning and heating device and method of use are proposed, the purpose is to remove the inclusions in the molten steel to the greatest extent, improve the cleanliness of the molten steel, and at the same time heat the molten steel for casting treatment to achieve low superheat casting, improve the solidification structure of the slab, and increase the proportion of equiaxed grains

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
  • Tundish molten steel slag washing, purifying and heating device and usage method
  • Tundish molten steel slag washing, purifying and heating device and usage method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The specific usage method and effect of the device are as follows:

[0030] Step 1: Adjust the temperature of the molten steel to be cast, so that the temperature of the molten steel in the ladle is lowered from the original 1630°C to 1620°C.

[0031] Step 2: Inject the molten steel in the ladle into the tundish normally, and at the same time add the covering agent into the tundish.

[0032] Step 3: When the molten steel level in the tundish rises to the refractory section at the lower part of the liquid slag pool, gradually inject refining slag into the liquid slag pool, and after the heating electrode is immersed in the refining slag, start the heating power supply manually The liquid refining slag is heated. The weight percentage of refining slag composition is: CaF 265%, Al 2 o 3 20%, CaO 10%, SiO 2 3%, P 0.003%, S 0.003%, and unavoidable impurities. The heating treatment of refining slag includes: calculating the liquidus temperature of the cast steel grade ...

Embodiment 2

[0036] The specific usage method and effect of the device are as follows:

[0037] Step 1: Adjust the temperature of the molten steel to be cast, so that the temperature of the molten steel in the ladle is lowered from the original 1615°C to 1600°C.

[0038] Step 2: inject the molten steel in the ladle into the tundish, and at the same time add the covering agent into the tundish.

[0039] Step 3: When the molten steel level in the tundish rises to the refractory section at the lower part of the liquid slag pool, gradually inject refining slag into the liquid slag pool, and after the heating electrode is immersed in the refining slag, start the heating power supply manually The liquid refining slag is heated. The weight percentage of refining slag composition is: CaF 2 65%, Al 2 o 3 20%, CaO 10%, SiO 2 3%, P 0.003%, S 0.003%, and unavoidable impurities. The heating treatment of refining slag includes: calculating the liquidus temperature of the cast steel grade accordi...

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 provides a tundish molten steel slag washing, purifying and heating device and a usage method. The device comprises a steel ladle, a tundish and a liquid slag pool. The liquid slag poolis cylindrical. The side wall of the liquid slag pool is composed of an upper section and a lower section. The upper section is a slag leaching resistant section. The lower section is a refractory material section. The liquid slag pool is connected with a supporting beam and is hung in the tundish. A heating electrode is arranged in the pool. An electromagnetic stirrer is arranged outside a long nozzle on the lower portion of the steel ladle. A molten steel temperature measuring thermocouple is arranged in the tundish and is connected with a PLC. The method comprises the steps of injecting themolten steel in a steel ladle into a tundish, and adding a covering agent at the same time; when the liquid level of the molten steel rises to the refractory material section of the liquid slag pool,injecting the refined slag into the liquid slag pool; after the heating electrode is immersed into the refining slag, heating the refined slag; turning on the electromagnetic stirrer and enabling themolten steel stream to be divergent. The cleanliness of molten steel is improved. Meanwhile, the molten steel is heated, and the low-overheating casting is achieved. The solidification structure of acasting blank is improved. The equiaxed crystal proportion is increased.

Description

technical field [0001] The invention belongs to the field of molten steel purification, in particular to a tundish liquid steel slag cleaning and heating device and usage method. Background technique [0002] In order to improve the quality of the continuous casting slab, it is necessary to remove the inclusions in the slab to the greatest extent first. In order to remove the inclusions in the molten steel as much as possible, the main technical means are tundish molten steel flow control and filtration technology. Tundish molten steel flow control technology mainly includes tundish capacity, shape optimization design, flow control research, etc. Reasonable tundish shape and large capacity will increase the residence time of molten steel in the tundish, so that the inclusions have sufficient time to float up. Setting retaining walls, dams and diversion partitions in the tundish is to control the flow path of molten steel and promote Effective method for inclusion removal. ...

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
IPC IPC(8): B22D11/111B22D11/115B22D11/116B22D41/00B22D11/18
CPCB22D11/111B22D11/115B22D11/116B22D41/00B22D11/182Y02P10/20
Inventor 唐复平李德军廖相巍任子平李德刚李广帮尚德礼于赋志李晓伟许孟春
Owner ANGANG STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap