Vertical continuous annealing furnace rapid blowing out method

A continuous annealing furnace, vertical technology, used in furnaces, heat treatment furnaces, furnace types and other directions, can solve the problems of long downtime, atmosphere replacement in the furnace and slow process of reducing furnace temperature, and achieves reduction of downtime, The effect of improving the effective operation rate and unit productivity, and reducing the risk of belt breakage

Active Publication Date: 2017-06-16
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for quickly shutting down a vertical continuous annealing furnace to solve the problem of slow furnace a

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0029] A method for quickly shutting down a vertical continuous annealing furnace. The rapid shutdown of the vertical continuous annealing furnace is realized by closing the hydrogen flow valve in advance, introducing a transition coil into the furnace, lowering the furnace temperature step by step, stopping the furnace, and opening the furnace cover.

[0030] The vertical continuous annealing furnace is in the normal production process, the protective atmosphere in the furnace is a mixture of 5% hydrogen and 95% nitrogen, and hydrogen and nitrogen are continuously fed into the furnace at a ratio of 5:95 to supplement the loss of protective atmosphere in the furnace . The thickness specifica...

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 relates to a vertical continuous annealing furnace rapid blowing out method. The vertical continuous annealing furnace rapid blowing out method is mainly used for technical problems in the prior art that furnace inside atmosphere replacing and furnace temperature reducing process is slow in vertical continuous annealing furnace blowing out, and blowing out time is relatively long. The vertical continuous annealing furnace rapid blowing out method comprises following steps: 1, a hydrogen flow valve is turned off; 2, a transition material is delivered into a vertical continuous annealing furnace, wherein the running speed of the transition material in the vertical continuous annealing furnace is controlled to be 280 to 350mpm; 3, furnace temperature is reduced step by step, wherein in a first period, the temperature of the vertical continuous annealing furnace is set to be 500 DEG C when the weld joints of a normal material and the transition material reach a final cooling segment, in a second period, the temperature of the vertical continuous annealing furnace is reduced to 500 DEG C, running of strip steel in the vertical continuous annealing furnace is stopped, and the temperature of the vertical continuous annealing furnace is set to be 300 to 400 DEG C; and 4, furnace covers are removed step by step. Technical control of the vertical continuous annealing furnace rapid blowing out method is simple, blowing out time of vertical continuous annealing furnaces is shortened effectively, and rapid blowing out of the vertical continuous annealing furnaces is realized.

Description

technical field [0001] The invention relates to the technical field of continuous annealing furnaces, in particular to a method for rapid shutdown of a vertical continuous annealing furnace. Background technique [0002] The continuous annealing furnace is used to recrystallize and anneal the work-hardened strip steel after cold rolling, improve the microstructure, improve plasticity and stamping formability, and ensure that the surface is not oxidized. After continuous annealing combines several separate processes of bell annealing into one unit, the production cycle is shortened from the original 10 days to at most one hour, the production material preparation is greatly reduced, the production process is simplified, the management is convenient, and the productivity is greatly improved. [0003] The vertical continuous annealing furnace is mainly used for the annealing production of tin-plated raw plates. The strip steel in the furnace is protected from oxidation by a mix...

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): C21D9/56C21D11/00C21D1/76C21D1/26
Inventor 刘洪王天顺许姣姣刘欣何锐
Owner SHANGHAI MEISHAN IRON & 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