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Setting method for descaling of finish rolling inlet of hot rolling strip steel production line

A hot-rolled strip and production line technology, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve defects, reduce rolling stability of finishing mills, production accidents and other problems, and ensure rolling stability. sexual effect

Active Publication Date: 2022-03-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the product rolling process, the model calculation results FSB1 and FSB2 only need to be turned on for one group. If only one group is available in the equipment state at this time, it may cause FSB1 and FSB2 to be completely closed.
In this case, it will affect the surface quality defects of the product, reduce the rolling stability of the finishing rolling unit, and easily lead to production accidents

Method used

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  • Setting method for descaling of finish rolling inlet of hot rolling strip steel production line
  • Setting method for descaling of finish rolling inlet of hot rolling strip steel production line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The parameters of a certain steel grade and a certain specification of hot-rolled products are as follows:

[0048] Model calculation results FSB1_CAL=1, FSB2_CAL=0

[0049] Device availability status FSB1_USE=0, FSB2_USE=1

[0050] set value

[0051] FSB1_SET=FSB1_CAL∧FSB1_USE=0

[0052] FSB2_SET=FSB2_CAL∧FSB2_USE=0

[0053] Error capture (Condition 1∧Condition 2∧Condition 3 should be met)

[0054] Satisfy condition 1: FSB1, FSB2 setting value is 0 at the same time.

[0055] Formula: FSB1_SET==0∧FSB2_SET==0

[0056] Condition 2 is met: FSB1 and FSB2 devices are available in different states. (0,1 or 1,0)

[0057] Formula: FSB1_USE⊕FSB2_USE

[0058] Condition 3 is satisfied: the calculation results of FSB1 and FSB2 models are different. (0,1 or 1,0)

[0059] Formula: FSB1_CAL⊕FSB2_CAL

[0060] The three conditions are met at the same time, so the setting value is corrected as follows:

[0061] FSB1_SET=FSB1_USE=0

[0062] FSB2_SET=FSB2_USE=1

[0063] In th...

Embodiment 2

[0065] The parameters of a certain steel grade and a certain specification of hot-rolled products are as follows:

[0066] Model calculation results FSB1_CAL=0, FSB2_CAL=1

[0067] Device availability status FSB1_USE=1, FSB2_USE=0

[0068] set value

[0069] FSB1_SET=FSB1_CAL∧FSB1_USE=0

[0070] FSB2_SET=FSB2_CAL∧FSB2_USE=0

[0071] Error capture (Condition 1∧Condition 2∧Condition 3 should be met)

[0072] Satisfy condition 1: FSB1, FSB2 setting value is 0 at the same time.

[0073] Formula: FSB1_SET==0∧FSB2_SET==0

[0074] Condition 2 is met: FSB1 and FSB2 devices are available in different states. (0,1 or 1,0)

[0075] Formula: FSB1_USE⊕FSB2_USE

[0076]Condition 3 is satisfied: the calculation results of FSB1 and FSB2 models are different. (0,1 or 1,0)

[0077] Formula: FSB1_CAL⊕FSB2_CAL

[0078] The three conditions are met at the same time, so the setting value is corrected as follows:

[0079] FSB1_SET=FSB1_USE=1

[0080] FSB2_SET=FSB2_USE=0

[0081] In thi...

Embodiment 3

[0083] The parameters of a certain steel grade and a certain specification of hot-rolled products are as follows:

[0084] Model calculation results FSB1_CAL=0, FSB2_CAL=1

[0085] Device availability status FSB1_USE=0, FSB2_USE=0

[0086] set value

[0087] FSB1_SET=FSB1_CAL∧FSB1_USE=0

[0088] FSB2_SET=FSB2_CAL∧FSB2_USE=0

[0089] Error capture (Condition 1∧Condition 2∧Condition 3 should be met)

[0090] Satisfy condition 1: FSB1, FSB2 setting value is 0 at the same time.

[0091] Formula: FSB1_SET==0∧FSB2_SET==0

[0092] Condition 2 is not met: FSB1 and FSB2 devices are available in different states. (0,1 or 1,0)

[0093] Formula: FSB1_USE⊕FSB2_USE

[0094] Condition 3 is satisfied: the calculation results of FSB1 and FSB2 models are different. (0,1 or 1,0)

[0095] Formula: FSB1_CAL⊕FSB2_CAL

[0096] The three conditions are not met simultaneously, so no correction processing is performed:

[0097] FSB1_SET=0

[0098] FSB2_SET=0

[0099] In this example, ther...

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Abstract

The invention relates to the technical field of hot-rolled strip steel production control, in particular to a setting method for descaling of a finish rolling inlet of a hot-rolled strip steel production line. Comprising the following steps of 1, performing result set exhaustion analysis on original control logic, and summarizing all conditions causing an abnormal set value; 2, induction is carried out on abnormal set value occurrence conditions, and an abnormal condition capture formula is fitted; 3, the set value of the water spraying collecting pipe of the finish rolling inlet descaling equipment is corrected to be consistent with the corresponding available state: FSB1SET = FSB1USE; and FSB2SET is equal to FSB2USE. And the abnormal conditions that at least one group of FSBs is in an available state, at least one group of FSBs needs to be started according to a model calculation result, and the set values FSBs are in an all-closed state are avoided.

Description

technical field [0001] The invention relates to the technical field of production control of hot-rolled strip steel, in particular to a setting method for descaling at the finish rolling entrance of a hot-rolled strip steel production line. Background technique [0002] The high-pressure water descaling equipment (FSB) at the entrance of the finishing unit of the hot-rolled strip steel production line usually has two sets of water spray headers (FSB1, FSB2). The calculation results of the model and the available state of the equipment jointly determine the set values ​​of FSB1 and FSB2. During the product rolling process, the model calculation results show that only one group of FSB1 and FSB2 needs to be turned on. If only one group is available in the equipment state at this time, it may cause all FSB1 and FSB2 to be turned off. In this case, it will affect the surface quality defect of the product, reduce the rolling stability of the finishing rolling unit, and easily lea...

Claims

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Application Information

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IPC IPC(8): B21B45/08B21B37/00
CPCB21B45/08B21B37/00
Inventor 李琳王国明杨承宇张守峰陈俭高颖男殷敏
Owner ANGANG STEEL CO LTD
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