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

Pickling technology of removing oxide scales on carbon steel hot-rolled plate

A technology for iron oxide scale and hot-rolled sheet, which is applied to the pickling technology of carbon steel hot-rolled sheet and strip, and the pickling process field of removing scale of carbon steel hot-rolled sheet and strip, can solve the problem of poor surface quality of pickling sheet and strip, Difficulty cleaning acid sludge, slow pickling speed, etc

Inactive Publication Date: 2013-06-19
TIANJIN YIBO STEEL MAKING
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there is a layer of iron oxide scale with a thickness of 6-15 μm on the surface of carbon steel hot-rolled strips. This layer of iron oxide scale is formed at high temperature after hot rolling. The iron oxide scale is an oxide of iron, mainly composed of FeO, Fe 2 o 3 , Fe 3 o 4 Composition, the iron oxide scale on the surface of the strip must be cleaned before cold rolling, but the surface quality of the pickling strip is poor in the pickling process, the pickling speed is slow, the loss of steel is large, and sulfuric acid has a strong corrosive effect on iron. Sulfuric acid pickling consumes a lot of steel, which is prone to over-pickling and hydrogen embrittlement. During the cold rolling process, the strip will be cracked and broken. When replacing the waste pickling medium, it is difficult to clean the acid sludge (pickling slag) in the acid tank. , the need to break scales before pickling

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
  • Pickling technology of removing oxide scales on carbon steel hot-rolled plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] A pickling process for removing oxide scales from carbon steel hot-rolled strips is as follows: See attached drawing.

[0024] The effect of adopting the new pickling process:

[0025] 1. The pickling process has been greatly improved

[0026] The hydrochloric acid pickling process adopts advanced reverse turbulence technology, acid regeneration technology and acid mist purification technology, so that waste acid and condensed acid can be recycled and reused, and the consumption of hydrochloric acid is reduced by 70-80%.

[0027] 2. Major breakthroughs have been made in environmental protection issues

[0028] Since the regeneration of waste acid and the recycling of condensed acid are realized, the problem of environmental pollution caused by waste acid and acid mist in the metallurgical industry is fundamentally solved.

[0029] 3. Fast pickling speed with hydrochloric acid

[0030] Hydrochloric acid pickling is almost twice the speed of sulfuric acid pickling, and...

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 pickling technology of removing oxide scales on a carbon steel hot-rolled plate, and the technology is mainly composed of a hydrochloric acid pickling technology and a regeneration treatment technology. The technology is reasonable, convenient to use, and ideal for removing the oxide scales on the carbon steel hot-rolled plate.

Description

technical field [0001] The invention relates to the rolling industry of ferrous metals, and is applied to the pickling process of hot-rolled carbon steel strips, especially a pickling process for removing oxide scales of hot-rolled carbon steel strips, which is suitable for pickling of hot-rolled carbon steel strips. wash technique. Background technique [0002] At present, there is a layer of iron oxide scale with a thickness of 6-15 μm on the surface of carbon steel hot-rolled strips. This layer of iron oxide scale is formed at high temperature after hot rolling. The iron oxide scale is an oxide of iron, mainly composed of FeO, Fe 2 o 3 , Fe 3 o 4 Composition, the iron oxide scale on the surface of the strip must be cleaned before cold rolling, but the surface quality of the pickling strip is poor in the pickling process, the pickling speed is slow, the loss of steel is large, and sulfuric acid has a strong corrosive effect on iron. Sulfuric acid pickling consumes a l...

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): C23G1/08
Inventor 宋书成王伟
Owner TIANJIN YIBO STEEL MAKING
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