Gapless rolling process for single-strand steckel mill

A furnace coil mill, no gap technology, applied in the field of steel rolling, can solve the problem of long rolling gap between two billets, and achieve the effect of shortening the rolling gap time and increasing the hourly output

Inactive Publication Date: 2010-06-09
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the rolling gap between the two billets existing in the existing steckel mill is too long, the purpose of the present invention is to prov

Method used

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  • Gapless rolling process for single-strand steckel mill
  • Gapless rolling process for single-strand steckel mill

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A gapless rolling process for a single-stand steckel mill. In this rolling process, before the first billet is cast, the second billet can be tapped and descaled, and follow up at a safe speed. When one piece of billet is cast, the second piece of billet enters the rolling mill for rolling, realizing seamless rolling in the steckel mill.

[0015] In this embodiment, two flat-rolled plate blanks with the same material shape and size are selected. The actual size of the blanks is 150*3180*8200mm, the thickness of the finished product is 25mm, and the rolling procedures are the same. Each blank is rolled for 7 passes without control. rolled. The specific process is as follows, see figure 1 :

[0016] (1) The first pass rolling of the first billet 11 ends, the rolling schedule of the second billet 12 reaches the primary interface of the rolling mill, and the heating furnace 6 begins to produce the second billet;

[0017] (2) After the second piece of billet 12 is tapped,...

Embodiment 2

[0022] A gapless rolling process for a single-stand steckel mill. In this rolling process, before the first billet is cast, the second billet can be tapped and descaled, and follow up at a safe speed. When one piece of billet is cast, the second piece of billet enters the rolling mill for rolling, realizing seamless rolling in the steckel mill.

[0023] In this embodiment, two rolling plate blanks with the same material shape and size are selected. The actual size of the blanks is 150*2880*16500mm, the thickness of the finished product is 10mm, and the rolling procedures are the same. Each blank is rolled for 9 passes without control. Rolling, the 7th, 8th, and 9th pass rolling. The specific process is as follows, see figure 2 :

[0024] (1) The 5th pass rolling of the first billet 21 ends, the rolling schedule of the second billet 22 reaches the primary interface of the rolling mill, and the heating furnace 6 begins to produce the second billet 22;

[0025] (2) After the ...

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Abstract

The invention discloses a gapless rolling process for a single-strand steckel mill. The rolling process is characterized in that before the steel throwing of the first blank, the second blank can be tapped and descaled, and can follow at safe speed; during the steel throwing of the first blank, the second blank is delivered into the mill to be rolled, and then the gapless rolling of the steckel mill is realized. The blanks can be flat rolling plate blanks or rolled rolling plate blanks. By modifying the two-stage and one-stage control programs of the mill, the rolling gap time of the two blanks is shortened; when the present blank is rolled, the rolling process of the next blank can be proceeded to a heating furnace area of the one-stage interface, and the tapping of the heating furnace in advance is realized; the next blank is descaled before the rolling of the previous blank is finished, and runs along with the previous blank towards the mill direction, and then the gapless rolling of the steckel mill is realized, and the hourly yield of the mill is enhanced.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a rolling process, in particular to a gapless rolling process for a single-stand steckel mill aimed at shortening the rolling gap between two billets. Background technique [0002] Steckel rolling mills are limited by the secondary model and primary control, and for the sake of equipment safety and billet temperature drop, usually when rolling steel plates, the rolling schedule of the next billet has to wait until the previous billet is rolled Only after throwing steel can it go down to the first-level rolling interface. Since the distance between the descaling box and the rolling mill is generally more than 90m, it generally takes more than 60s from the billet descaling to entering the rolling mill for rolling. The gap time between two billets is too long, which affects the output of the rolling mill. Contents of the invention [0003] In order to overcome the problem that the roll...

Claims

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Application Information

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IPC IPC(8): B21B37/00
Inventor 滕达姚永宽王道远党军
Owner NANJING IRON & STEEL CO LTD
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