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

Descaling apparatus

A shell and high-pressure fluid technology, which is applied in the feeding device of abrasive materials, manufacturing tools, metal rolling, etc., can solve the problems of uneven surface roughness of steel plates, ineffective rust removal, high unit price of stainless steel beads, etc. Rust efficiency, size reduction, and surface quality improvement effects

Inactive Publication Date: 2013-03-20
POHANG IRON & STEEL CO LTD
View PDF8 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, for the descaling method using metallic steel grit or grit in contact with the surface of the steel plate, or bringing slurry mixed with water and stainless steel balls into contact with the surface of the steel plate by centrifugal force, the steel plate is degraded due to the phenomenon of embedding in the steel plate. The average surface roughness (Ra) after derusting is in the range of 2.3μm to 3.5μm, so the surface roughness of the derusted steel plate is not uniform as a whole
In addition, there is a problem that the unit price of stainless steel beads is high
[0014] Meanwhile, other rust removal techniques have been developed, such as a method of removing rust by spraying high-pressure water, or a method of spraying ice particles, but the rust removal effect of these methods is not obvious, and there are problems in their practicability

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
  • Descaling apparatus
  • Descaling apparatus
  • Descaling apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0163] When the steel plate continues to pass under the conditions of Table 3 below, based on figure 2 The descaling treatment was performed on a low-carbon hot-rolled steel plate (2.0 mm thick x 1200 mm wide) at a line speed of 50 mpm using the process described in . As a result, the level of residual rust was less than 1%, similar to the level of residual rust of the hot-rolled steel sheet through the existing pickling treatment, the average surface roughness of the steel sheet was 1.2 μm, and the glossiness of the steel sheet surface was also excellent.

[0164] [table 3]

[0165]

Embodiment 2）

[0167] Under the conditions of Table 4 below, based on figure 2 The process described in the descaling treatment is performed on a high-strength hot-rolled steel plate (thickness 4.0 mm × width 1200 mm) at an operating line speed of 50 mpm, the hot-rolled high-strength steel plate contains 0.1% carbon, 1.2% silicon and 1.2% manganese. As a result, the level of residual rust was less than 2%, similar to the level of residual rust of the hot-rolled steel sheet through the existing pickling treatment, the average surface roughness of the steel sheet was 1.5 μm, and the glossiness of the steel sheet surface was excellent, And reduce surface defects caused by red rust.

[0168] [Table 4]

[0169]

Embodiment 3）

[0171] When the steel plate continues to pass under the conditions of Table 5 below, based on figure 2 The descaling treatment was performed on a low-carbon hot-rolled steel plate (2.3 mm thick x 1000 mm wide) at a line speed of 50 mpm using the process described in . As a result, the level of residual rust was less than 1%, similar to that of a hot-rolled steel sheet treated by conventional pickling, the average surface roughness of the steel sheet was 1.5 μm, and the glossiness of the steel sheet surface was excellent.

[0172] [table 5]

[0173]

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
roughnessaaaaaaaaaa
roughnessaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a descaling apparatus for effectively removing scales formed on surfaces of hot-rolled steel strips (steel sheets). An embodiment of the descaling apparatus of the present invention comprises: a housing arranged on a hot-rolled steel strip transfer path; high pressure fluid supply means arranged in the housing to supply by injecting a high pressure fluid into the housing; abrasive material injection means arranged in the housing to inject an abrasive material into the housing; and abrasive slurry spray means arranged in the housing to spray, onto the hot-rolled steel strips, abrasive slurry of the high pressure fluid and the abrasive material mixed in the housing.; According to the present invention, physical (mechanical) descaling is implemented, scale treatment processes are simplified, and surface roughness of the hot-rolled steel strips can be maintained at an appropriate level, thus enabling eco-friendly and high efficiency descaling. Particularly, the apparatus of the present invention can be applied to hot-rolled steel strip treatment process being performed at high speed.

Description

technical field [0001] The present invention relates to a descaling device for removing rust or other residual foreign matter formed on the surface of a hot-rolled steel strip (steel plate). [0002] More specifically, the present invention relates to an environment-friendly rust removal device, which realizes the removal of rust or Other residual foreign matter, in addition, the derusting device can achieve efficient derusting by simplifying the equipment structure and derusting process, and properly maintaining and adjusting the average surface roughness of the steel strip after derusting. Background technique [0003] At high temperatures, a rust layer with a thickness of about 5 μm to 15 μm is often formed on the surface of hot-rolled steel sheets (steel strips), such as hot-rolled carbon steel, high-strength steel, silicon-added steel for electric motors, or stainless steel. [0004] For example, figure 1 A known device for removing rust formed on the surface of a hot...

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): B21B45/06B24C3/22
CPCB21B45/06B24C3/32B24C3/08B21B45/08B24C7/0084B24C7/0076B24C1/086B24C5/02
Inventor 曹秀铉金泰喆秦荣述
Owner POHANG 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