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A method for rapid resumption of production with continuous unloading

A continuous furnace annealing and rapid technology, applied in the direction of furnaces, furnace types, heat treatment furnaces, etc., can solve the problems of long time required for resumption of production, achieve the effects of shortening resumption time, reducing nitrogen flow, and obvious purging effect

Active Publication Date: 2020-11-20
马钢(合肥)钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing continuous annealing line takes too long to resume production after overhaul, the present invention provides a method for rapid production resumption of continuous annealing furnace

Method used

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  • A method for rapid resumption of production with continuous unloading
  • A method for rapid resumption of production with continuous unloading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] A method for rapidly resuming production by continuously withdrawing the furnace. The continuous furnace is purged in the power-on state, including the following steps:

[0081] (1) Introduce nitrogen into the continuous unwinding furnace;

[0082] After the overhaul is completed, nitrogen is introduced into the continuous withdrawal furnace through the TOP point of the nitrogen-hydrogen mixing station. The pressure of the nitrogen main pipe is controlled at 4Mpa and the flow rate is controlled at 4000Nm 3 / h, nitrogen flows to the furnace chambers of each section in the continuous unloading furnace until the furnace pressure reaches 0.8mbar.

[0083] (2) Turn on the fans of each section;

[0084] Turn on the fans of the furnace chambers in each section of the furnace, and make the fan speed reach 10% of the maximum speed; open the venting valve of the continuous furnace, and the opening degree of the venting valve is between 50% for gas renewal.

[0085] (3) The enti...

Embodiment 2

[0098] A method for rapidly resuming production by continuously withdrawing the furnace. The continuous furnace is purged in the power-on state, including the following steps:

[0099] (1) Introduce nitrogen into the continuous unwinding furnace;

[0100] After the overhaul is completed, nitrogen is introduced into the continuous withdrawal furnace through the TOP point of the nitrogen-hydrogen mixing station, the pressure of the nitrogen main pipe is controlled at 6Mpa, and the flow rate is controlled at 3500Nm 3 / h, nitrogen flows to the furnace chambers of each section in the continuous unloading furnace until the furnace pressure reaches 0.9mbar.

[0101] (2) Turn on the fans of each section;

[0102] Turn on the fans of the furnace chambers in each section of the furnace, and make the fan speed reach 5% of the maximum speed; open the release valve of the continuous furnace, and the opening degree of the release valve is between 30% for gas renewal.

[0103] (3) The link...

Embodiment 3

[0116] A method for rapidly resuming production by continuously withdrawing the furnace. The continuous furnace is purged in the power-on state, including the following steps:

[0117] (1) Introduce nitrogen into the continuous unwinding furnace;

[0118] After the overhaul is completed, nitrogen is introduced into the continuous withdrawal furnace through the TOP point of the nitrogen-hydrogen mixing station, the pressure of the nitrogen main pipe is controlled at 5Mpa, and the flow rate is controlled at 3800Nm 3 / h, nitrogen flows to the furnace chambers of each section in the furnace, and nitrogen flows to the furnace chambers of each section of the continuous unloading furnace until the furnace pressure reaches 0.9mbar.

[0119] (2) Turn on the fans of each section;

[0120] Turn on the fans of the furnace chambers in each section of the furnace, and make the fan speed reach 8% of the maximum speed; open the release valve of the continuous furnace, and the opening degree ...

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Abstract

The invention discloses a method of quick production restoring of a continuous annealing furnace, and belongs to the field of cold rolling continuous annealing. According to the method of quick restoring production of the continuous annealing furnace, the continuous annealing furnace purges under a starting up state. Nitrogen is introduced into the continuous annealing furnace; and under the condition of nitrogen introducing and purging, draught fans are gradually opened, and linkage, igniting and temperature ring, hydrogen injecting and production restoring are conducted on a whole continuousannealing furnace group. According to the method of quick production restoring of the continuous annealing furnace, purging can be conducted under the starting state, production restoring time can beshortened greatly, moreover, equipment is not damaged.

Description

technical field [0001] The invention belongs to the field of continuous annealing of cold rolling, and in particular relates to a method for rapid resumption of production by continuous unloading. Background technique [0002] Continuous annealing line (CAL for short) is a continuous production line that integrates independent traditional production processes such as cleaning, continuous annealing, leveling, coiling, and inspection. The continuous production of the production line is realized by replacing the bell furnace with a continuous annealing furnace (referred to as continuous annealing furnace for short), and great progress has been made in the process. Continuous annealing production line has many advantages such as high product added value, high production efficiency and high yield, and has developed rapidly around the world. [0003] At present, in the continuous annealing line, continuous annealing is the key equipment. Due to the continuous working of the cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26C21D9/52C21D1/76
Inventor 江欢郑旺陈满珠
Owner 马钢(合肥)钢铁有限责任公司