CN114807494B - Method for replacing crane beam of receiving span and refining span of steel mill without stopping production - Google Patents
Method for replacing crane beam of receiving span and refining span of steel mill without stopping production Download PDFInfo
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- CN114807494B CN114807494B CN202210469639.9A CN202210469639A CN114807494B CN 114807494 B CN114807494 B CN 114807494B CN 202210469639 A CN202210469639 A CN 202210469639A CN 114807494 B CN114807494 B CN 114807494B
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- molten steel
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- 238000007670 refining Methods 0.000 title claims abstract description 145
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 98
- 239000010959 steel Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000009749 continuous casting Methods 0.000 claims description 45
- 238000010276 construction Methods 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention belongs to the field of steelmaking, and relates to a method for replacing a crane girder of a receiving span and a refining span of a steel mill without stopping production, wherein the refining span of molten steel is divided into five sections, the receiving span of molten steel is divided into six sections, and replacement is carried out in sections, so that two-line production can be ensured during each section of replacement; the production of two production lines is ensured while the crane beam is replaced by the molten steel refining span and the molten steel receiving span, the production efficiency is improved, and precious experience is provided for domestic large-scale steel enterprises to realize full-line replacement of the receiving span and the refining span crane beam in a non-stop production state.
Description
Technical Field
The invention belongs to the field of steelmaking, and relates to a method for replacing a crane girder of a receiving span and a refining span of a steel mill without stopping production.
Background
The steel mill receives the crane beam replacement of the crane beam of the crane and the refining crane beam to greatly impact production, and the crane beam is replaced by full stop production in China.
Disclosure of Invention
In view of the above, the invention aims to provide a method for replacing a crane girder accepted by a steelworks and refined by the steelworks without stopping production, and the production of two production lines of the steelworks can be ensured during the replacement.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for replacing a steel mill receiving span and refining span crane beam without stopping production, comprising the following steps:
s1, dividing a molten steel refining span into five sections according to the length direction sequence, dividing a molten steel receiving span into six sections according to the length direction sequence, and replacing the molten steel receiving span in a time-sharing and sectional manner, wherein the total duration period is 82 days;
s2, during the two-section construction of refining, the No. 1 converter and the No. 2 converter can only travel the technological path of the LF refining furnace, argon blowing, large ladle capping and steel car operation box shifting are carried out, the period of the continuous casting machine is prolonged during replacement, and the on-site production is satisfied;
s3, when the refining is constructed across three sections, the No. 2 converter can only travel the technological path of the LF refining furnace, the period of the continuous casting machine is prolonged during the replacement, and the production is satisfied;
s4, during four-section construction of refining, the LF refining furnace No. 1 is abnormal, the LF refining furnace No. 2 can be used for crane co-production, a large ladle cover capable of being transported is newly added and spanned by the crane in a refining manner, and the sliding plate mechanism is replaced and transferred to a cold repair area capable of being spanned in the North;
s5, when the refining is performed across five sections, the crane beam is constructed from the south to the north during replacement, so that the influence time is reduced;
s6, when receiving construction of a second section of span, transferring molten steel from the RH furnace to a No. 1 converter, a No. 3 converter and a No. 1 LF refining furnace steel car on a refining span through a 350 ton travelling crane, transferring to a molten steel receiving span, and then hanging to a ladle turret of a No. 2 continuous casting machine of the receiving span through the 350 ton travelling crane for production;
s7, when receiving three-section construction, transferring molten steel from the No. 2 converter and the No. 3 converter to an RH refining furnace steel car through a 350-ton travelling crane in a refining span to enter a molten steel receiving span, and then hanging the molten steel from the 350-ton travelling crane to a ladle turret of a continuous casting machine of the receiving span 1 for production;
s8, when receiving the construction of the four sections, transferring molten steel from the No. 2 converter to an RH refining furnace steel car through a 350 ton crane in a refining span, entering a molten steel receiving span, and hanging the molten steel from the 350 ton crane to a ladle turret of a No. 1 continuous casting machine and a No. 2 continuous casting machine for production; molten steel from the No. 1 LF refining furnace is transferred to an RH refining furnace steel car through a 350 ton crane to enter a molten steel receiving span in the refining span, and then is hoisted to a ladle turret of a No. 1 continuous casting machine for production through the 350 ton crane;
s9, when receiving construction of five sections, lifting molten steel of the No. 2 LF refining furnace to an RH refining furnace steel car from a 350 ton crane in refining, and transferring the molten steel to a receiving upper casting machine from the RH refining furnace steel car; receiving 1 temporary ladle hot repair position and 1 turning casting residue and slag pot position which are added at the 1 section crossing the south side; the cold repair ladle is transferred to the refining overline through a newly added overline; the casting residue pot transfers the casting residue pot to a steel slag span by receiving a south-crossing automobile;
s10, when the construction is carried out across six sections, 4 steel ladle temporary ladle laying positions, 1 temporary steel ladle unpacking position and 2 temporary baking positions are newly added across the north of the refining.
Optionally, the refining span section comprises an RH refining furnace, a refining span No. 1 continuous casting machine and a refining span No. 2 continuous casting machine; the refining span two sections comprise a No. 1 converter; the refining span three sections comprise a No. 2 converter; the refining span four sections comprise a No. 1 LF refining furnace, a No. 3 converter and a refining span No. 3 continuous casting machine; the refining span five sections comprise No. 2 LF refining furnace.
Optionally, the receiving span two section comprises receiving span No. 1 continuous casting machine; the receiving span three sections comprise receiving span No. 2 continuous casting machines; the receiving span five sections comprise a No. 3 continuous casting machine.
Optionally, the first section of the refining span is changed to be 1 to 31 days, the second section of the refining span is changed to be 18 to 23 days, the third section of the refining span is changed to be 30 to 35, the fourth section of the refining span is changed to be 1 to 5 days, and the fifth section of the refining span is changed to be 58 to 79 days.
Alternatively, the first replacement cycle is accepted as 42 to 55 days, the second replacement cycle is accepted as 54 to 64 days, the third replacement cycle is accepted as 64 to 76 days, the fourth replacement cycle is accepted as 9 to 18 days, the fifth replacement cycle is accepted as 9 to 28 days, and the sixth replacement cycle is accepted as 43 to 55 days and 76 to 82 days.
The invention has the beneficial effects that: according to the method for replacing the span and refining span crane beam of the steel mill without stopping production, disclosed by the invention, the production of two production lines is ensured while the replacement of the molten steel refining span and the molten steel receiving span crane beam is realized, the production efficiency is improved, and precious experience is provided for domestic large-scale steel enterprises to realize full-line replacement of the receiving span and the refining span crane beam in a non-stopping production state.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a refining cross-section of molten steel according to the present invention;
FIG. 2 is a schematic view of a molten steel receiving span according to the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, a method for replacing a crane girder of a receiving span and a refining span of a steelworks without stopping production comprises the following steps:
s1, dividing a molten steel refining span into five sections according to the length direction sequence, dividing a molten steel receiving span into six sections according to the length direction sequence, and replacing the molten steel receiving span in a time-sharing and sectional manner, wherein the total duration period is 82 days;
s2, when the refining is constructed across one section, the RH refining furnace cannot produce during the construction of the section;
s3, during the refining and two-stage construction, no crane is used for lifting and transporting temperature-regulating steel scraps and wires, and the horizontal No. 1 roaster cannot be used; the No. 1 converter and the No. 2 converter can only travel the technological path of the LF refining furnace, argon blowing, large ladle capping and steel car operation box shifting are carried out, the period of the continuous casting machine is prolonged during replacement, and the on-site production is satisfied;
s4, when the refining spans three-section construction, no crane is used for lifting and transporting temperature-regulating scrap steel and wires, and the No. 1 LF refining furnace cannot produce; the No. 2 converter can only travel the technological path of the LF refining furnace, the period of the continuous casting machine is prolonged during the replacement, and the production is satisfied;
s5, when the four-section construction is carried out in refining, the No. 2 LF refining furnace cannot be produced, the large ladle cover cannot be transported after being repaired, and the horizontal No. 2 roaster cannot be used; no. 1 LF refining furnace is abnormal, no. 2 LF refining furnace can be produced by crane, newly added span-to-refining span-to-span large ladle cover can be transported, and the replacement of the sliding plate mechanism is carried out in the northern cold repair receiving area;
s6, when the refining cross-five-section construction is performed, the large ladle is covered and cannot be constructed; when the crane beam is replaced, the crane beam is constructed from the south to the north, so that the influence time is reduced;
s7, receiving a cross-section construction, wherein production is not affected;
s8, when the construction of the span two sections is accepted, the continuous casting machine of the span 1 can not be produced (annual repair) and the continuous casting machines of the span 2 and the span 3 can not be accepted, and molten steel from the RH refining furnace can not directly enter the molten steel receiving span; molten steel from the RH furnace is transferred to a steel car of a No. 1 converter, a No. 3 converter and a No. 1 LF refining furnace through a 350 ton crane in a refining span, and then is hoisted to a ladle turret of a No. 2 continuous casting machine and a No. 3 continuous casting machine for production through the 350 ton crane;
s9, when receiving construction of a span three section, receiving a span No. 2 continuous casting machine and receiving production of a span No. 1 continuous casting machine and a span No. 3 continuous casting machine, wherein molten steel from a No. 2 converter and a No. 3 converter cannot directly enter the span No. 1 continuous casting machine to be produced, and a vertical No. 1 roaster and a vertical No. 3 roaster cannot be used; molten steel from the No. 2 converter and the No. 3 converter is transported to an RH refining furnace steel car through a 350 ton crane in a refining span to enter a molten steel receiving span, and then is hoisted to a ladle turret of a No. 1 continuous casting machine for production through the 350 ton crane in the receiving span;
s10, when the four-section construction is accepted, molten steel from a No. 2 converter cannot directly enter a molten steel accepting section, and molten steel from a No. 1 LF refining furnace cannot directly enter the molten steel accepting section; molten steel from a converter No. 2 is transported to an RH refining furnace steel car through a 350-ton crane in a refining span and enters a molten steel receiving span, and is hoisted to a ladle turret of a continuous casting machine No. 1 and No. 2 in the receiving span through the 350-ton crane; molten steel from the No. 1 LF refining furnace is transferred to an RH refining furnace steel car through a 350 ton crane to enter a molten steel receiving span in the refining span, and then is hoisted to a ladle turret of a No. 1 continuous casting machine for production through the 350 ton crane;
s11, when receiving the construction of five sections, covering the big bag, and failing to construct; the No. 2 LF refining furnace molten steel is lifted to an RH refining furnace steel car from a 350 ton crane in refining span, and is transported to a receiving span casting machine from the RH refining furnace steel car; receiving 1 temporary ladle hot repair position and 1 turning casting residue and slag pot position which are added at the 1 section crossing the south side; the cold repair ladle is transferred to the refining overline through a newly added overline; the casting residue pot transfers the casting residue pot to a steel slag span by receiving a south-crossing automobile;
s12, when receiving the six-section construction, the No. 3 and No. 4 vertical roaster cannot work during cold repair of the steel ladle, and the steel ladle in the area is cleaned completely; refining and adding 4 steel ladle temporary ladle laying positions, 1 temporary steel ladle unpacking position and 2 temporary baking positions across the north.
In the embodiment, the refining span section comprises an RH refining furnace, a refining span No. 1 continuous casting machine and a refining span No. 2 continuous casting machine; the refining span two sections comprise a No. 1 converter; the refining span three sections comprise a No. 2 converter; the refining span four sections comprise a No. 1 LF refining furnace, a No. 3 converter and a refining span No. 3 continuous casting machine; the refining span five sections comprise a No. 2 LF refining furnace, and the receiving span two sections comprise a receiving span No. 1 continuous casting machine; the receiving span three sections comprise receiving span No. 2 continuous casting machines; the receiving span five sections comprise a No. 3 continuous casting machine.
In the embodiment, construction is performed according to a period, and a refining span and a receiving span can be constructed in an overlapping manner, wherein the refining span is 1 to 31 days, the refining span is 18 to 23 days, the refining span is 30 to 35 days, the refining span is 1 to 5 days, the refining span is 58 to 79 days, the receiving span is 42 to 55 days, the receiving span is 54 to 64 days, the receiving span is 64 to 76 days, the receiving span is 9 to 18 days, the receiving span is 9 to 28 days, and the receiving span is 43 to 55 days and 76 to 82 days.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (1)
1. A method for replacing a crane girder of a receiving span and a refining span of a steel mill without stopping production, comprising the following steps:
s1, dividing a molten steel refining span into five sections according to the length direction sequence, dividing a molten steel receiving span into six sections according to the length direction sequence, and replacing the molten steel receiving span in a time-sharing and sectional manner, wherein the total duration period is 82 days;
the refining span section comprises an RH refining furnace, a refining span No. 1 continuous casting machine and a refining span No. 2 continuous casting machine; the refining span two sections comprise a No. 1 converter; the refining span three sections comprise a No. 2 converter; the refining span four sections comprise a No. 1 LF refining furnace, a No. 3 converter and a refining span No. 3 continuous casting machine; the refining span five sections comprise No. 2 LF refining furnaces; the receiving span two sections comprise receiving span No. 1 continuous casting machines; the receiving span three sections comprise receiving span No. 2 continuous casting machines; the receiving span five sections comprise a No. 3 continuous casting machine;
s2, during the two-section construction of refining, the No. 1 converter and the No. 2 converter can only travel the technological path of the LF refining furnace, argon blowing, large ladle capping and steel car operation box shifting are carried out, the period of the continuous casting machine is prolonged during replacement, and the on-site production is satisfied;
s3, when the refining is constructed across three sections, the No. 2 converter can only travel the technological path of the LF refining furnace, the period of the continuous casting machine is prolonged during the replacement, and the production is satisfied;
s4, during four-section construction of refining, the LF refining furnace No. 1 is abnormal, the LF refining furnace No. 2 is produced by crane cooperation, the new span is accepted to the refining span, the large ladle cover is transported, and the replacement of the sliding plate mechanism is transferred to the northern cold repair receiving area for implementation;
s5, when the refining is performed across five sections, the crane beam is constructed from the south to the north during replacement, so that the influence time is reduced;
s6, when receiving construction of a second section of span, transferring molten steel from the RH furnace to a No. 1 converter, a No. 3 converter and a No. 1 LF refining furnace steel car on a refining span through a 350 ton travelling crane, transferring to a molten steel receiving span, and then hanging to a ladle turret of a No. 2 continuous casting machine of the receiving span through the 350 ton travelling crane for production;
s7, when receiving three-section construction, transferring molten steel from the No. 2 converter and the No. 3 converter to an RH refining furnace steel car through a 350-ton travelling crane in a refining span to enter a molten steel receiving span, and then hanging the molten steel from the 350-ton travelling crane to a ladle turret of a continuous casting machine of the receiving span 1 for production;
s8, when receiving the construction of the four sections, transferring molten steel from the No. 2 converter to an RH refining furnace steel car through a 350 ton crane in a refining span, entering a molten steel receiving span, and hanging the molten steel from the 350 ton crane to a ladle turret of a No. 1 continuous casting machine and a No. 2 continuous casting machine for production; molten steel from the No. 1 LF refining furnace is transferred to an RH refining furnace steel car through a 350 ton crane to enter a molten steel receiving span in the refining span, and then is hoisted to a ladle turret of a No. 1 continuous casting machine for production through the 350 ton crane;
s9, when receiving construction of five sections, lifting molten steel of the No. 2 LF refining furnace to an RH refining furnace steel car from a 350 ton crane in refining, and transferring the molten steel to a receiving upper casting machine from the RH refining furnace steel car; receiving 1 temporary ladle hot repair position and 1 turning casting residue and slag pot position which are added at the 1 section crossing the south side; the cold repair ladle is transferred to the refining overline through a newly added overline; the casting residue pot transfers the casting residue pot to a steel slag span by receiving a south-crossing automobile;
s10, when six-section construction is accepted, refining the newly added 4 temporary ladle laying positions, 1 temporary ladle unpacking position and 2 temporary baking positions across the north;
the first replacement period of the refining is 1 to 31 days, the second replacement period of the refining is 18 to 23 days, the third replacement period of the refining is 30 to 35 days, the fourth replacement period of the refining is 1 to 5 days, and the fifth replacement period of the refining is 58 to 79 days; the method comprises the steps of receiving 42-55 days of a first replacement period, 54-64 days of a second replacement period, 64-76 days of a third replacement period, 9-18 days of a fourth replacement period, 9-28 days of a fifth replacement period, 43-55 days of a sixth replacement period and 76-82 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469639.9A CN114807494B (en) | 2022-04-28 | 2022-04-28 | Method for replacing crane beam of receiving span and refining span of steel mill without stopping production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469639.9A CN114807494B (en) | 2022-04-28 | 2022-04-28 | Method for replacing crane beam of receiving span and refining span of steel mill without stopping production |
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| Publication Number | Publication Date |
|---|---|
| CN114807494A CN114807494A (en) | 2022-07-29 |
| CN114807494B true CN114807494B (en) | 2024-01-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758049A (en) * | 2012-08-04 | 2012-10-31 | 中国二十二冶集团有限公司 | Construction method of oversize converter large span |
| JP2017160480A (en) * | 2016-03-09 | 2017-09-14 | Ｊｆｅプラントエンジ株式会社 | Exchange method of converter body |
| CN110092285A (en) * | 2019-05-22 | 2019-08-06 | 北京首钢建设集团有限公司 | A kind of switching installation method of the strengthening steel crane girder part when not stopping production |
| CN110836028A (en) * | 2019-11-22 | 2020-02-25 | 上海宝冶集团有限公司 | Double-high-span steel-making tower installation method |
| CN112609032A (en) * | 2020-11-30 | 2021-04-06 | 上海宝冶冶金工程有限公司 | Method for replacing crane beam of casting house |
| CN213772113U (en) * | 2020-11-30 | 2021-07-23 | 中冶京诚工程技术有限公司 | Cross-span transverse RH vacuum refining device arrangement structure of vacuum tank truck |
-
2022
- 2022-04-28 CN CN202210469639.9A patent/CN114807494B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758049A (en) * | 2012-08-04 | 2012-10-31 | 中国二十二冶集团有限公司 | Construction method of oversize converter large span |
| JP2017160480A (en) * | 2016-03-09 | 2017-09-14 | Ｊｆｅプラントエンジ株式会社 | Exchange method of converter body |
| CN110092285A (en) * | 2019-05-22 | 2019-08-06 | 北京首钢建设集团有限公司 | A kind of switching installation method of the strengthening steel crane girder part when not stopping production |
| CN110836028A (en) * | 2019-11-22 | 2020-02-25 | 上海宝冶集团有限公司 | Double-high-span steel-making tower installation method |
| CN112609032A (en) * | 2020-11-30 | 2021-04-06 | 上海宝冶冶金工程有限公司 | Method for replacing crane beam of casting house |
| CN213772113U (en) * | 2020-11-30 | 2021-07-23 | 中冶京诚工程技术有限公司 | Cross-span transverse RH vacuum refining device arrangement structure of vacuum tank truck |
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| CN114807494A (en) | 2022-07-29 |
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