CN112872306A - Method for quickly replacing slag pan of continuous casting machine without stopping machine - Google Patents

Method for quickly replacing slag pan of continuous casting machine without stopping machine Download PDF

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Publication number
CN112872306A
CN112872306A CN202110132681.7A CN202110132681A CN112872306A CN 112872306 A CN112872306 A CN 112872306A CN 202110132681 A CN202110132681 A CN 202110132681A CN 112872306 A CN112872306 A CN 112872306A
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CN
China
Prior art keywords
slag pan
molten steel
continuous casting
replacing
slag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110132681.7A
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Chinese (zh)
Inventor
郭鹏
丁寅
苏磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xinjiang Bayi Iron and Steel Co Ltd
Original Assignee
Xinjiang Bayi Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xinjiang Bayi Iron and Steel Co Ltd filed Critical Xinjiang Bayi Iron and Steel Co Ltd
Priority to CN202110132681.7A priority Critical patent/CN112872306A/en
Publication of CN112872306A publication Critical patent/CN112872306A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16Controlling or regulating processes or operations
    • B22D11/18Controlling or regulating processes or operations for pouring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/12Travelling ladles or similar containers; Cars for ladles
    • B22D41/13Ladle turrets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

The invention discloses a method for quickly replacing a slag pan of a continuous casting machine without stopping, which comprises the following steps that 1, a traveling crane before the slag pan is replaced hoists a prepared empty slag pan to one side of the continuous casting machine for waiting, and the other traveling crane prepares to hoist the slag pan filled with slag on the other side of the continuous casting machine; 2. the superheat degree of a tundish of the first furnace of molten steel before the slag pan is replaced is 5-10 ℃ higher than that of other normal casting furnaces; 3. liquid level of the tundish: adjusting the liquid level of the molten steel in the tundish to the highest position before replacing the slag pan; 4. the pouring speed is reduced by 0.2-0.5m/min in the process of replacing the slag pan; 5. rotating the rotary table to a position where the ladle is not above the slag pan in the process of replacing the slag pan; 6. and after the molten steel of the ladle at the pouring position is poured, rotating the rotary turntable to enable the ladle to leave the position above the slag pan, hoisting the full slag pan away from the site by using a travelling crane at one side of the continuous casting machine, putting the prepared empty slag pan into a designated position by using the other travelling crane, rotating the next ladle of molten steel to the pouring position by using the rotary turntable, opening the pouring, and finishing the replacement of the slag pan.

Description

Method for quickly replacing slag pan of continuous casting machine without stopping machine
Technical Field
The invention relates to a method for quickly replacing a slag pan without stopping a continuous casting machine.
Background
In the production process of a steel plant, a steel ladle containing qualified molten steel is generally hoisted to a rotary table of a continuous casting machine, the rotary table is rotated to rotate the steel ladle to a pouring position, the qualified molten steel is injected into a tundish through a long water gap, a covering agent is added above the molten steel of the tundish, the molten steel can be isolated from air and can adsorb impurities in the molten steel, the molten steel below the covering agent of the tundish is distributed into a crystallizer and a fan-shaped section through a submerged water gap, the molten steel starts to solidify and crystallize, and a completely solidified casting blank is cut into a billet with a certain length. A large amount of impurities adsorbed by the covering agent in the tundish are discharged into the slag pan through the slag discharge port at intervals, a new covering agent is added into the tundish, the shell of the slag pan is formed by welding steel plates, the contact part of the inner part and the steel slag is coated by a high-temperature refractory material, and after the steel slag is full, another slag pan needs to be replaced to continue operation.
Disclosure of Invention
The invention aims to provide a method for quickly replacing a slag pan of a continuous casting machine without stopping the machine, which can replace the slag pan on line without stopping the machine, improve the operation rate of the continuous casting machine, save the production cost and reduce the defect rate of casting blanks.
The method for quickly replacing the slag pan of the continuous casting machine without stopping comprises the following steps of preparing a travelling crane before replacing the slag pan, controlling the molten steel temperature, the liquid level of a tundish, the pouring speed and the direction of a rotary table and replacing the molten steel temperature, the liquid level of the tundish, the pouring speed and the direction of the rotary table: 1. and (3) traveling preparation: the method comprises the following steps that a travelling crane lifts a prepared empty slag pan to one side of a continuous casting machine for waiting before the slag pan is replaced, and the other travelling crane prepares to lift the slag pan filled with slag on the other side of the continuous casting machine; 2. the molten steel temperature is as follows: the superheat degree of a tundish of the first furnace of molten steel before the slag pan is replaced is 5-10 ℃ higher than that of other normal casting furnaces; 3. liquid level of the tundish: adjusting the liquid level of the molten steel in the tundish to the highest position before replacing the slag pan; 4. pouring speed: the pouring speed is reduced by 0.2-0.5m/min in the process of replacing the slag pan; 5. orientation of the rotary table: rotating the rotary table to a position where the ladle is not above the slag pan in the process of replacing the slag pan; 6. the replacement process comprises the following steps: and after the molten steel of the ladle at the pouring position is poured, rotating the rotary turntable to enable the ladle to leave the position above the slag pan, hoisting the full slag pan away from the site by using a travelling crane at one side of the continuous casting machine, putting the prepared empty slag pan into a designated position by using the other travelling crane, rotating the next ladle of molten steel to the pouring position by using the rotary turntable, opening the pouring, and finishing the replacement of the slag pan.
1. The invention can change the slag pan when the continuous casting machine does not stop, and the operation time of a single continuous casting machine is increased by 2 hours every day. 2. The method can reduce the waste quantity of the head and the tail of the casting blank by about 6 tons every day, reduce the production cost and increase the enterprise benefit. 3. The method has small change of pouring speed in the process of replacing the slag pan, lays a foundation for lean solidification of a casting blank, and can reduce the occurrence rate of quality defects of the continuous casting blank.
Detailed Description
A method for quickly replacing a slag pan of a continuous casting machine without stopping comprises the following steps of preparing a travelling crane before replacing the slag pan, controlling and replacing the molten steel temperature, the liquid level of a tundish, the pouring speed and the direction of a rotary table: 1. and (3) traveling preparation: the method comprises the following steps that a travelling crane lifts a prepared empty slag pan to one side of a continuous casting machine for waiting before the slag pan is replaced, and the other travelling crane prepares to lift the slag pan filled with slag on the other side of the continuous casting machine; 2. the molten steel temperature is as follows: the superheat degree of a tundish of the first furnace of molten steel before the slag pan is replaced is 5-10 ℃ higher than that of other normal casting furnaces; 3. liquid level of the tundish: adjusting the liquid level of the molten steel in the tundish to the highest position before replacing the slag pan; 4. pouring speed: the pouring speed is reduced by 0.2-0.5m/min in the process of replacing the slag pan; 5. orientation of the rotary table: rotating the rotary table to a position where the ladle is not above the slag pan in the process of replacing the slag pan; 6. the replacement process comprises the following steps: and after the molten steel of the ladle at the pouring position is poured, rotating the rotary turntable to enable the ladle to leave the position above the slag pan, hoisting the full slag pan away from the site by using a travelling crane at one side of the continuous casting machine, putting the prepared empty slag pan into a designated position by using the other travelling crane, rotating the next ladle of molten steel to the pouring position by using the rotary turntable, opening the pouring, and finishing the replacement of the slag pan.

Claims (1)

1. A method for quickly replacing a slag pan of a continuous casting machine without stopping is characterized by comprising the following steps of preparing a travelling crane before replacing the slag pan, controlling and replacing the molten steel temperature, the liquid level of a tundish, the pouring speed and the direction of a rotary table: 1. and (3) traveling preparation: the method comprises the following steps that a travelling crane lifts a prepared empty slag pan to one side of a continuous casting machine for waiting before the slag pan is replaced, and the other travelling crane prepares to lift the slag pan filled with slag on the other side of the continuous casting machine; 2. the molten steel temperature is as follows: the superheat degree of a tundish of the first furnace of molten steel before the slag pan is replaced is 5-10 ℃ higher than that of other normal casting furnaces; 3. liquid level of the tundish: adjusting the liquid level of the molten steel in the tundish to the highest position before replacing the slag pan; 4. pouring speed: the pouring speed is reduced by 0.2-0.5m/min in the process of replacing the slag pan; 5. orientation of the rotary table: rotating the rotary table to a position where the ladle is not above the slag pan in the process of replacing the slag pan; 6. the replacement process comprises the following steps: and after the molten steel of the ladle at the pouring position is poured, rotating the rotary turntable to enable the ladle to leave the position above the slag pan, hoisting the full slag pan away from the site by using a travelling crane at one side of the continuous casting machine, putting the prepared empty slag pan into a designated position by using the other travelling crane, rotating the next ladle of molten steel to the pouring position by using the rotary turntable, opening the pouring, and finishing the replacement of the slag pan.
CN202110132681.7A 2021-02-01 2021-02-01 Method for quickly replacing slag pan of continuous casting machine without stopping machine Pending CN112872306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110132681.7A CN112872306A (en) 2021-02-01 2021-02-01 Method for quickly replacing slag pan of continuous casting machine without stopping machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110132681.7A CN112872306A (en) 2021-02-01 2021-02-01 Method for quickly replacing slag pan of continuous casting machine without stopping machine

Publications (1)

Publication Number Publication Date
CN112872306A true CN112872306A (en) 2021-06-01

Family

ID=76052117

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110132681.7A Pending CN112872306A (en) 2021-02-01 2021-02-01 Method for quickly replacing slag pan of continuous casting machine without stopping machine

Country Status (1)

Country Link
CN (1) CN112872306A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5196157A (en) * 1990-06-28 1993-03-23 Hitachi Zosen Corporation Tundish exchange apparatus for a continuous casting equipment
CN202411395U (en) * 2011-12-06 2012-09-05 武汉大西洋连铸设备工程有限责任公司 Online replaceable slag disk device
CN204234720U (en) * 2014-10-08 2015-04-01 福建三钢闽光股份有限公司 A kind of overflow launder is mobile more changing device fast
CN204338847U (en) * 2014-11-26 2015-05-20 中冶连铸技术工程有限责任公司 A kind of overflow tank dolly that can change online
CN108145109A (en) * 2018-01-25 2018-06-12 柳州钢铁股份有限公司 The method that stream is opened in sheet billet continuous casting cast
CN110216260A (en) * 2019-06-19 2019-09-10 武汉钢铁有限公司 The method of Cleanliness of Molten Steel is improved in continuous casting process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5196157A (en) * 1990-06-28 1993-03-23 Hitachi Zosen Corporation Tundish exchange apparatus for a continuous casting equipment
CN202411395U (en) * 2011-12-06 2012-09-05 武汉大西洋连铸设备工程有限责任公司 Online replaceable slag disk device
CN204234720U (en) * 2014-10-08 2015-04-01 福建三钢闽光股份有限公司 A kind of overflow launder is mobile more changing device fast
CN204338847U (en) * 2014-11-26 2015-05-20 中冶连铸技术工程有限责任公司 A kind of overflow tank dolly that can change online
CN108145109A (en) * 2018-01-25 2018-06-12 柳州钢铁股份有限公司 The method that stream is opened in sheet billet continuous casting cast
CN110216260A (en) * 2019-06-19 2019-09-10 武汉钢铁有限公司 The method of Cleanliness of Molten Steel is improved in continuous casting process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
朱苗勇等: "现代冶金学(钢铁冶金卷)", 《现代冶金学(钢铁冶金卷) *

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Application publication date: 20210601