CN114438299A - Hot charging method for continuous casting sheet billet heating furnace - Google Patents
Hot charging method for continuous casting sheet billet heating furnace Download PDFInfo
- Publication number
- CN114438299A CN114438299A CN202210016967.3A CN202210016967A CN114438299A CN 114438299 A CN114438299 A CN 114438299A CN 202210016967 A CN202210016967 A CN 202210016967A CN 114438299 A CN114438299 A CN 114438299A
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- China
- Prior art keywords
- furnace
- heating
- hot
- plate blank
- heating furnace
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009749 continuous casting Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
Abstract
The invention relates to a hot charging method of a continuous casting sheet billet heating furnace, which is characterized in that slabs with different temperatures are placed at different positions in a hot rolling heating furnace through a steel charging mechanism to realize regional heating of the hot slabs; and the plate blank with the furnace entering temperature of more than or equal to 500 ℃ adopts the longest stroke for steel loading, and directly enters the heating section and the soaking section for heating after passing through the preheating section. The advantages are that: the position of the plate blank in the heating furnace is controlled according to the actual condition of the plate blank, so that the plate blank can be placed accurately, the burning loss is reduced, the energy is saved, and the comprehensive yield of products is improved.
Description
Technical Field
The invention relates to a hot charging method of a continuous casting sheet billet heating furnace.
Background
At the present stage, because the steel-making production plan is consistent with the steel rolling production plan by more than 95%, because the production plan is not matched with the plate blank of the off-line, the hot charging rate of the plate blank is improved, in addition, only one fixed position (furnace tail) enters the furnace, the hot charging plate blank can not be fully utilized, the heating time is long, the burning loss is large, and the energy waste is caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the hot charging method of the continuous casting thin slab heating furnace, which can determine the charging position according to the temperature of the slab, reduce the time of the slab in the furnace, reduce the oxidation burning loss and improve the comprehensive yield of products.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a hot charging method of a continuous casting sheet billet heating furnace is characterized in that slabs with different temperatures are placed at different positions in a hot rolling heating furnace through a steel charging mechanism, so that the hot slabs are heated in different regions; and the plate blank with the furnace entering temperature of more than or equal to 500 ℃ adopts the longest stroke for steel loading, and directly enters the heating section and the soaking section for heating after passing through the preheating section.
The longest stroke is the maximum distance from a water beam entering the furnace by the steel loading machine to the tail end wall of the furnace.
The thickness of the slab is as follows: 135 mm-170 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. the charging position of the plate blank is controlled according to the temperature of the plate blank, and the plate blank with the temperature above 500 ℃ is conveyed to the farthest distance, so that the time of the plate blank in the furnace is reduced, and the oxidation burning loss is reduced.
2. The method of the invention replaces the fixed position of the plate blank only at the furnace tail when the plate blank is fed into the furnace, solves the problems of different heating time and different furnace time when the plate blank is fed into the furnace, can control the position of the plate blank in the heating furnace according to the actual condition of the plate blank, realizes accurate placement, reduces burning loss, saves energy and improves the comprehensive yield of products.
3. The method provided by the invention is stable in operation, has no fault, and improves the steel loading efficiency.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 1, the hot charging method of the continuous casting sheet billet heating furnace comprises the following steps:
1. and (3) identifying the temperature of the plate blank: the slab is divided into hot slab and cold slab according to the temperature. The hot blank is a macroscopic 'red blank' with high temperature, the cold blank is a macroscopic 'non-red blank', and the temperature of the red blank is not less than 500 ℃ through on-site measurement. The cold blank temperature is less than 500 ℃. The temperature of the plate blank is detected by a pyrometer arranged on a steel loading roller way, the charging temperature of the plate blank in the steel loading roller way is collected by the pyrometer, the temperature value is fed back to an operation picture through a PLC to be displayed, and the steel is charged at the position 1 or the position 2 according to the charging temperature. An operation screen is provided with an MIN-CH identification key for a steel loading position 1 and a NOR-CH identification key for a steel loading position 2, and an operator selects a slab charging mode according to different temperatures of slabs.
2. Steel loading by a steel loading mechanism: the charging machine is a device for transferring a slab into a heating furnace, and transfers the slab onto a water beam in the furnace, and the slab transferred into the furnace is moved in the furnace by a furnace bottom stepping mechanism. The steel loading machine conveys the plate blank to a water beam in the furnace, the steel loading machine has two positions, namely a minimum stroke and a maximum stroke, the minimum stroke is the minimum distance between the steel loading machine and the water beam in the furnace and the tail end wall of the furnace, the maximum stroke is the longest distance between the steel loading machine and the furnace, and the distance between the water beam and the tail end wall of the furnace is 170 mm. The maximum stroke of the steel loading machine is 10290m, and the maximum distance between a water beam entering the furnace and the tail end wall of the furnace is 8000 m.
The hot blank is charged with steel to the maximum distance in the furnace, and the cold blank is charged with steel at the minimum distance. The equipment is divided into two actions of lifting and advancing and retreating, wherein the lifting is driven by hydraulic pressure, and the advancing and retreating are driven by mechanical transmission. Firstly, the charging rod pushes the plate blank, then rises, supports the positioned plate blank on the charging roller way, then advances at variable speed to send the plate blank to the upper part of the fixed beam at the position to be charged in the furnace, descends and puts on the fixed beam, and the charging rod continues to descend and returns. Thus completing the operation of charging the plate blank once. The advance and retreat stroke is controlled by a pulse generator through a furnace zone PLC. The advancing and retreating are driven by a variable frequency motor. The cooling system of the steel loading machine is water-cooled, and soft water is used as a medium for ensuring the stable operation of the cooling system of the equipment. When the charging temperature of the slab is less than 500 ℃ and the furnace is empty, the steel loading machine charges the slab into the furnace at the position 1, the distance between a water beam in the furnace and the end wall of the furnace tail can be known according to the design of the heating furnace, and the slab is at the furnace tail of the furnace by 170mm, so that the slab can be preheated and heated after being charged into the furnace. When the heating furnace is not empty and the feeding temperature of the slab is not less than 500 ℃, the steel loading machine feeds the slab into the heating furnace at the position 2, and the slab is placed at a position 8000mm away from the inside of the furnace from the tail of the heating furnace according to the design of the heating furnace, so that the hot-loaded slab can reduce the tapping of the slab after the time of the slab in the heating furnace reaches the tapping temperature, and the oxidation burning loss is reduced.
3. Heating and steel burning in different areas: the cold blank is heated by a preheating section, a heating section and a soaking section, and the blank with the heating temperature meeting the requirement waits for tapping. The hot billet directly enters the heating section and the soaking section for heating, so that the time of passing through the preheating section is saved, and in addition, the charging temperature of the hot billet of the red steel is high, the heating time is saved, and the oxidation burning loss of the slab is reduced.
4. Tapping: and taking the plate blank out of the furnace by a tapping machine after the plate blank meeting the heating requirement is received by a tapping command of the roughing mill, and after the plate blank is descaled after the furnace, rolling the plate blank in the roughing mill.
Claims (3)
1. A hot charging method of a continuous casting sheet billet heating furnace is characterized in that slabs with different temperatures are placed at different positions in a hot rolling heating furnace through a steel charging mechanism, so that the hot slabs are heated in different areas; and the plate blank with the furnace entering temperature of more than or equal to 500 ℃ adopts the longest stroke for steel loading, and directly enters the heating section and the soaking section for heating after passing through the preheating section.
2. The hot charging method of a continuous casting thin slab heating furnace according to claim 1, wherein the maximum stroke is a maximum distance from a water beam entering the furnace to a furnace tail end wall of a steel charging machine.
3. The hot charging method of a continuous casting thin slab heating furnace according to claim 1, wherein the thickness of the slab is: 135 mm-170 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016967.3A CN114438299A (en) | 2022-01-07 | 2022-01-07 | Hot charging method for continuous casting sheet billet heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016967.3A CN114438299A (en) | 2022-01-07 | 2022-01-07 | Hot charging method for continuous casting sheet billet heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114438299A true CN114438299A (en) | 2022-05-06 |
Family
ID=81367402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210016967.3A Pending CN114438299A (en) | 2022-01-07 | 2022-01-07 | Hot charging method for continuous casting sheet billet heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114438299A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN112575175A (en) * | 2019-09-30 | 2021-03-30 | 宝钢湛江钢铁有限公司 | Slab warehouse and heating furnace layout for split charging of cold and hot slabs of thick plates and charging method |
-
2022
- 2022-01-07 CN CN202210016967.3A patent/CN114438299A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN112575175A (en) * | 2019-09-30 | 2021-03-30 | 宝钢湛江钢铁有限公司 | Slab warehouse and heating furnace layout for split charging of cold and hot slabs of thick plates and charging method |
Non-Patent Citations (3)
| Title |
|---|
| 席约强: "线棒材生产实现连铸坯热送热装的若干问题(二)", 《轧钢》, 28 February 2001 (2001-02-28), pages 6 * |
| 权芳民等: "纯高炉煤气在不锈钢板坯预热炉上的应用研究", 《《工业炉》, pages 19 - 21 * |
| 李东宇等: "鞍钢热轧2150 线加热炉节能技术研究", 《鞍钢技术》, pages 1 * |
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