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Sheet billet continuous casting and rolling dummy rolling method and control system thereof

A thin slab continuous casting and slab technology, applied in rolling force/roll gap control, metal rolling, metal rolling, etc., can solve problems such as low operating rate and long abnormal downtime

Active Publication Date: 2020-11-06
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thin slab continuous casting and rolling virtual rolling method and its control system to solve the problems of low operating rate and long abnormal downtime of the thin slab continuous casting and rolling production line in the prior art

Method used

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  • Sheet billet continuous casting and rolling dummy rolling method and control system thereof
  • Sheet billet continuous casting and rolling dummy rolling method and control system thereof
  • Sheet billet continuous casting and rolling dummy rolling method and control system thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0039] refer to figure 1 , figure 1 It is a schematic flow chart of a dummy rolling method for thin slab continuous casting and rolling in an embodiment of the present invention.

[0040] In this embodiment, the dummy rolling method of thin slab continuous casting and rolling is applied to an industrial computer, and the method includes:

[0041] 1) Steelmaking: molten steel is obtained through conventional smelting;

[0042] 2) Thin slab continuous casting: casting the molten steel into a slab through a thin slab continuous casting machine, controlling the casting speed of the thin slab continuous casting machine to be 4.8-5.5 m / min, and controlling the thickness of the slab to be 50 ~55mm, control the temperature of the slab entering the soaking furnace to exceed 950°C;

[0043] 3) Soaking: Soaking the slab through the soaking furnace, controlling the time of the slab in the furnace to exceed 40 minutes, the temperature deviation of the same plate does not exceed 5°C, and...

no. 2 example

[0069] Based on the same inventive concept, the embodiment of the present invention also provides a The thin slab continuous casting and rolling virtual rolling control system includes: a thin slab continuous casting machine, a soaking furnace, a high-pressure water descaling machine, a seven-stand finishing mill, laminar cooling equipment and a coiler.

[0070] The thin slab continuous casting machine is used to cast the molten steel into a slab after obtaining molten steel through conventional smelting, the casting speed of the thin slab continuous casting machine is controlled to be 4.8-5.5m / min, and the slab is controlled to The thickness of the slab is 50-55mm, and the temperature of the slab entering the soaking furnace is controlled to exceed 950°C;

[0071] The soaking furnace is used for soaking the slab, controlling the time of the slab in the furnace to exceed 40 minutes, the temperature deviation of the same plate does not exceed 5°C, and the temperature of the fu...

no. 3 example

[0077] Based on the same inventive idea, such as figure 2 As shown, the embodiment of the present invention also provides a computer-readable storage medium 200, on which a computer program 211 is stored, and when the program 211 is executed by a processor, the following steps are implemented:

[0078]Steelmaking: molten steel is obtained through conventional smelting; thin slab continuous casting: the molten steel is cast into slabs through a thin slab continuous casting machine, and the casting speed of the thin slab continuous casting machine is controlled to be 4.8 to 5.5 m / min, and the controlled The thickness of the slab is 50-55mm, and the temperature of the slab entering the soaking furnace is controlled to exceed 950°C; soaking: soaking the slab through the soaking furnace; descaling: soaking the soaked slab Carry out two passes of high-pressure descaling; finish rolling: control the slab after dephosphorization to enter the seven-stand finish rolling mill, set the s...

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Abstract

The invention relates to the technical field of steel rolling, in particular to a sheet billet continuous casting and rolling dummy rolling method and a control system thereof. The method comprises the steps that steel smelting is conducted; sheet billet continuous casting is conducted; soaking is conducted; descaling is conducted; finish rolling is conducted, specifically, a sheet billet subjected to descaling is controlled to enter a seven-machine-frame finishing mill, machine frames without production conditions are set to be dummy mode machine frames, the flow rate of cooling water and theroller gap height of working rollers of the dummy mode machine frames are adjusted, the roller gap pre-positioning pressing time of the machine frames F4, F5, F6 and F7, and the sheet billet subjected to descaling is rolled through the reset six machine frames to obtain a piece of thin strip steel; and winding is conducted. When one of the machine frames breaks down and does not have the production condition, production can be continued through dummy rolling, accordingly, it is ensured that production of a sheet billet continuous casting and rolling production line is smooth, and the productquality is stable, the operation efficiency of the finishing mill is improved, the abnormal stopping time is shortened, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a thin slab continuous casting and rolling dummy rolling method and a control system thereof. Background technique [0002] Thin slab continuous casting and rolling organically combines the traditional processes of steelmaking, continuous casting, and steel rolling. The process is simple and efficient, energy-saving and environmentally friendly. However, there is a rigid connection between the preceding and following processes, and the integration of casting and rolling leads to the production organization of the thin slab continuous casting and rolling production line being not as flexible as that of the conventional hot rolling production line. Once a certain stand in the finishing rolling mill breaks down and does not meet the production conditions and cannot return to normal within 30 minutes, it will cause the entire process of production to be interrupted, and it will...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B45/06B21B45/00B21B27/06B21B37/58B21B37/74B22D11/16
CPCB21B1/463B21B45/06B21B45/004B21B27/06B21B37/58B21B37/74B22D11/16B21B2271/02Y02P70/10
Inventor 王成何金平王金平陈昊赵敏丁茹李波赵强
Owner 武汉钢铁有限公司
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