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Rough rolling rhythm control method

A control method and rough rolling technology, which is applied in the direction of rolling mill control device, metal rolling, metal rolling, etc., can solve the problems of low production line production capacity and slow rolling rhythm, so as to improve the rough rolling rhythm and solve the rolling rhythm slower effect

Active Publication Date: 2016-10-26
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a rough rolling rhythm control method, which solves or partly solves the technical problem of the slow rolling rhythm of the rough rolling control method in the prior art, which leads to low production capacity of the production line, and realizes the effective improvement of rough rolling. Rhythmic Technical Effects

Method used

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Experimental program
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Effect test

Embodiment 1

[0043] S1: The target temperature range of the slab in the rough rolling production line is: 880°C-920°C, and the rough rolling exit temperature is 880°C.

[0044] S2: Control the rough rolling process of the slab as follows: rolling mill R1 rolling 3 passes, rolling mill R2 rolling 5 passes; wherein, the rolling speed of rolling mill R1 is 1.4 m / s; the rolling speed of rolling mill R2 is 2.2 m / s m / s, and the slab is fully descaled during the rolling process of rolling mill R1 and rolling mill R2. In the 2nd, 3rd and 4th passes of the rolling mill R2, the slab is dephosphorized at the entrance and exit of the rolling mill R2.

[0045] S3: Perform multi-point swing steel control on the slab, specifically: S301, swing steel on the first slab at the entrance roller table of rolling mill R2; and control the swing time of the first slab according to the target temperature range. S302. The second slab is placed on the entrance roller table of rolling mill R1; when the first slab st...

Embodiment 2

[0048] S1: The target temperature range of the slab in the rough rolling production line is: 885°C-910°C, and the rough rolling exit temperature is 885°C.

[0049] S2: Control the rough rolling process of the slab as follows: rolling mill R1 rolling 3 passes, rolling mill R2 rolling 5 passes; wherein, the rolling speed of rolling mill R1 is 1.3 m / s; the rolling speed of rolling mill R2 is 2.5 m / s m / s, and the slab is fully descaled during the rolling process of rolling mill R1 and rolling mill R2. In the 2nd, 3rd and 4th passes of the rolling mill R2, the slab is dephosphorized at the entrance and exit of the rolling mill R2.

[0050]S3: Perform multi-point swing steel control on the slab, specifically: S301, swing steel on the first slab at the entrance roller table of rolling mill R2; and control the swing time of the first slab according to the target temperature range. S302. The second slab is placed on the entrance roller table of rolling mill R1; when the first slab sta...

Embodiment 3

[0053] S1: The target temperature range of the slab in the rough rolling production line is: 888°C-915°C, and the rough rolling exit temperature is 888°C.

[0054] S2: Control the rough rolling process of the slab as follows: rolling mill R1 rolling 3 passes, rolling mill R2 rolling 5 passes; wherein, the rolling speed of rolling mill R1 is 1.2 m / s; the rolling speed of rolling mill R2 is 2.8 m / s m / s, and the slab is fully descaled during the rolling process of rolling mill R1 and rolling mill R2. In the 2nd, 3rd and 4th passes of the rolling mill R2, the slab is dephosphorized at the entrance and exit of the rolling mill R2.

[0055] S3: Perform multi-point swing steel control on the slab, specifically: S301, swing steel on the first slab at the entrance roller table of rolling mill R2; and control the swing time of the first slab according to the target temperature range. S302. The second slab is placed on the entrance roller table of rolling mill R1; when the first slab st...

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Abstract

The invention relates to a rough rolling rhythm control method. The method comprises the following steps that the rough rolling outlet temperature of a plate blank in a rough rolling production line is controlled to the lower limit of the target temperature range; according to the rough rolling process control of the plate blank, a rolling machine R1 carries out three-pass rolling, and a rolling machine R2 carries out five-pass rolling, wherein the rolling speed of the rolling machine R1 is not higher than 1.5 m / s, the rolling speed of the rolling machine R2 is 2 m / s to 3.5 m / s, and in the rolling process, the rolling machine R1 and the rolling machine R2 carry out complete descaling processing on the plate blank; and in the second pass, the third pass and the fourth pass of rolling of the rolling machine R2, the plate blank is descaled at an inlet and an outlet of the rolling machine R2, and multi-point steel putting control over the plate blank is carried out. The rough rolling rhythm control method can effectively improve the rough rolling rhythm.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a rough rolling rhythm control method. Background technique [0002] Since similar thick-gauge high-grade pipeline steel and wheel steel require high heating temperature and low rough-rolling exit temperature, in order to ensure low-temperature rolling requirements, the rough-rolling stage needs to lower the slab temperature to the range of 880°C to 920°C to meet the requirements of finishing. The rolling entrance is required to be 900-940°C, and the temperature drop of the slab in the rough rolling area needs to be above 280°C. However, according to the previous rolling process, it is only necessary to pass through the R2 last pass before rolling the steel to wait for rolling to cool down. When rolling according to the normal secondary setting, the steel swing time is as short as 120s and as long as 200s. The rolling rhythm is only 12 rolls / hour. [0003] The rolling rhy...

Claims

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Application Information

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IPC IPC(8): B21B37/00
CPCB21B37/00
Inventor 王健周政张弛范建坤丁万於小武李继新张明生王章领韩乐
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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