Free cooling method of hot rolling band steel

A cooling method and technology for hot-rolled strip steel, applied in the field of metallurgy, can solve the problems of cooling of unstrip steel products, control differences, inability to realize the temperature rise of the head and tail of strip steel, etc., and achieve the effect of length control and free length control.

Active Publication Date: 2010-06-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in the patent application for "CN02144825.6" and the patent application titled "Laminar Flow Cooling Method for Hot-Rolled Strip Middle Billet", because it mainly performs cooling control at the rough rolling exit, it does not focus on strip steel. The cooling from the rolling exit to the coiling is taken into consideration. At the same time, the patented technology mainly cools the intermediate billet, but does not cool the finished strip steel. As a result, there is a big difference in its control.
[0015] In the authorized patent with the patent number "CN200410021048.7", the invention name i...

Method used

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  • Free cooling method of hot rolling band steel
  • Free cooling method of hot rolling band steel
  • Free cooling method of hot rolling band steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1 was implemented at Baosteel 1880 hot rolling site.

[0062] The 1880 hot rolling system divides the strip steel into certain length sections on the laminar flow cooling system for control. The segment generation and tracking of the strip is the basis for the implementation of the model control function of the 1880 hot rolling laminar cooling system.

[0063] According to the 1880 hot rolling laminar flow cooling system of this embodiment, the section length of each strip is determined according to the thickness of the strip.

[0064] The details are as follows: (The following data is the experience time, which is mainly determined according to the running speed of the strip;

[0065] thickness

segment length

<4mm

0.8-1.2m

>=4mm,<7mm

0.6-0.8m

>7mm

0.5-0.6m

[0066] According to the above method, combine the length of the strip to obtain the number of sections of the strip; for example, the thickness of t...

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Abstract

The invention provides a free cooling method of hot rolling band steel, which featured in that temperature testing devices and induction feedback devices are arranged respectively at the fine rolling outlet, the coiling inlet and the laminar flow cooling roller way acting as the middle portion of the cooling device; the temperature of the laminar flow cooling water in the three sections are adjusted and controlled after the coiling temperature difference of the head and tail of the band steel and the middle portion of the band steel is tested and fed back. Therefore, the method of the invention can not only control the head and tail temperature of the band steel freely, but also control the length of the head and tail of the band steel freely.

Description

technical field [0001] The present invention relates to the field of metallurgy, specifically, the present invention relates to a strip steel hot rolling cooling method, and more specifically, the present invention relates to a kind of hot steel strip coming out from the last rolling stand (end mill roll) of finish rolling to the coiling section With laminar cooling method. Background technique [0002] Hot rolling is to use slab (mainly continuous casting slab) as raw material, and after heating, it is made into strip steel by rough rolling unit and finishing rolling unit. The hot steel strip coming out of the last rolling stand of finishing rolling is cooled to the set temperature by laminar flow, and rolled into a steel strip coil by the coiler. The cooled steel coils are processed into steel plates, flat coils and Slit strip products. Hot-rolled strip steel is often used as structural steel, so it requires high performance processing. [0003] As mentioned above, a l...

Claims

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Application Information

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IPC IPC(8): B21B37/76
Inventor 荣鸿伟何晓明董晖高志玲杭志亮
Owner BAOSHAN IRON & STEEL CO LTD
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