CN111349744A - Method for cleaning steel slag under converter - Google Patents
Method for cleaning steel slag under converter Download PDFInfo
- Publication number
- CN111349744A CN111349744A CN202010370092.8A CN202010370092A CN111349744A CN 111349744 A CN111349744 A CN 111349744A CN 202010370092 A CN202010370092 A CN 202010370092A CN 111349744 A CN111349744 A CN 111349744A
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- China
- Prior art keywords
- slag
- steel
- pit
- slag pit
- cleaning
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- 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
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for cleaning steel slag under a converter, which comprises the following steps: a. manufacturing a first slag pit at a slag receiving position and a second slag pit at a steel tapping position on the inner side of a furnace lower rail; b. when tapping, the ladle car is still above the second slag pit, the second slag pit is used for receiving splashed molten steel when the molten steel is poured, and when the steel ladle penetrates through the steel and leaks, the second slag pit is used for receiving the molten steel; c. when slag is discharged, pouring the steel slag into a slag ladle car standing above the first slag pit or directly pouring the steel slag into the first slag pit; d. in the moving process of the ladle car, steel slag right below the converter is scraped to a first slag pit through a slag scraper arranged on the ladle car; e. when the volume of the steel slag in the first slag pit is greater than or equal to 4/5 of the volume of the first slag pit, the first slag pit is cleaned by using a loader, and when the furnace is shut down, the steel slag in the second slag pit is cleaned.
Description
Technical Field
The invention relates to the technical field of a mode and a method for comprehensively cleaning steel slag under a small and medium-sized converter in the metallurgical industry, in particular to a method for cleaning steel slag under a converter.
Background
The converter is a core facility for smelting molten steel, about 10% of steel slag can be generated in the smelting process, and the steel slag is poured into a special slag basin below the converter and transported to a steel slag treatment plant for secondary treatment and recycling. As is known, the basic track gauge of a track of a steel ladle car below a medium-and-small-sized 60-ton converter is small, splashing is easily caused by the influence of molten iron coefficient, scrap steel and other reasons on the converter, a large amount of high-temperature slag is scattered on a slag channel under the converter, the production process of the double cars frequently walks back and forth, the safe operation of the double cars under the converter is seriously endangered, the span distance from the slag scraped by the slag ladle car to the slag is long, the slag scraped by the slag ladle car is large in slag scraping resistance and easy to damage, dust is serious, and if a ladle-through ladle leakage accident occurs, wheels and the track of the steel ladle car can be cast, so that the treatment and the.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for cleaning steel slag under a converter, which effectively solves the problem of cleaning the steel slag under the converter and also avoids the condition that molten steel casts wheels and rails when a steel ladle penetrates through the ladle and leaks.
The invention is realized by the following technical scheme, and provides a method for cleaning steel slag under a converter, which comprises the following steps:
a. manufacturing a first slag pit at a slag receiving position and a second slag pit at a steel tapping position on the inner side of a furnace lower rail;
b. when steel is tapped, the ladle car is still above the second slag pit, the second slag pit is used for receiving splashed molten steel when the molten steel is poured, the influence of steel slag formed by the splashed molten steel on the movement of the ladle car and the ladle car is reduced, and when steel is penetrated through a ladle and leaked, the second slag pit is used for receiving the molten steel, so that the leaked molten steel is prevented from casting wheels and rails of the ladle car, the handling difficulty after an accident is greatly reduced, the accident handling time is shortened to the greatest extent, and the production is guaranteed to be continuously carried out;
c. when slag is discharged, pouring the steel slag into a slag ladle car standing above the first slag pit or directly pouring the steel slag into the first slag pit; when the buggy ladle does not work, the steel slag is poured into the buggy ladle standing above the first slag pit, the buggy ladle transports the steel slag out by utilizing the working gap of the buggy ladle, the steel slag is directly poured into the first slag pit when the buggy ladle transports the molten steel, and the first slag pit is utilized to pre-store the steel slag, so that the rhythm of cleaning the steel slag is effectively relieved, and the stable operation of production is ensured;
d. in the moving process of the ladle car, the slag scraper arranged on the ladle car scrapes the steel slag right below the converter to the first slag pit, so that the slag scraping distance of the slag scraper is greatly shortened, the walking resistance of the ladle car is greatly reduced, the slag conveying stability is improved, and the safety production is guaranteed;
e. when the volume of the steel slag in the first slag pit is greater than or equal to 4/5 of the volume of the first slag pit, a loader is used for cleaning the first slag pit, and when the furnace is shut down, the steel slag in the second slag pit is cleaned; the loader is used for conveying the steel slag in the first slag pit to the slag-crossing slag stewing pool in a centralized manner, so that the carrying load of the slag ladle vehicle is reduced, the purpose of stable production is achieved, the steel slag in the second slag pit is cleaned when the furnace is shut down, the normal production is not influenced, and the use function of the second slag pit is ensured.
As optimization, the bottom and the pit side wall of the first slag pit and the second slag pit are respectively provided with a steel plate with the thickness of 22-30 mm, embedded bars extending into the track mounting foundation are arranged on the steel plates in a penetrating mode, and the embedded bars are welded with the steel plates. This optimization scheme is through setting up the steel sheet that thickness is 22~30mm in the slag pit, is convenient for clear up slag or molten steel in the slag pit, avoids slag and molten steel direct and rail installation basis contact to avoided causing the pollution to groundwater, fixed the steel sheet through the bar planting, improved the stability of steel sheet, avoid the steel sheet to shift.
As optimization, the end of the embedded steel bar far away from the rail mounting base is flush with the steel plate, and a welding groove is formed in the steel plate. This optimization scheme sets up bar planting and steel sheet to the parallel and level, avoids having the bulge to cause the hindrance to the scraper bowl of loader, makes the slag clearance more thorough, also avoids the fixed of steel sheet to be destroyed by the loader, makes the welding more firm through setting up the groove, and the bar planting is more reliable to the fixed of steel sheet.
For optimization, the depth of the first slag pit is 800-900 mm, the included angle between the pit side walls at two ends of the first slag pit along the extension direction of the furnace lower track and a vertical plane is 45-50 degrees, and the size of an upper opening of the first slag pit is larger than that of a lower opening; the depth of the second slag pit is 500-600 mm, the included angle between the pit side wall at two ends of the second slag pit along the extension direction of the furnace lower track and a vertical plane is 45-50 degrees, and the size of an upper opening of the second slag pit is larger than that of a lower opening. The degree of depth setting in first slag pit of this optimization scheme and second slag pit has satisfied the temporary storage requirement of slag and accident leakage molten steel respectively, inclines the lateral wall at both ends around with first slag pit and second slag pit and sets up the suitable for reading size of second slag pit to be greater than the suitable for reading size, conveniently utilizes the loader to clear up.
As optimization, the sizes of the upper openings of the first slag pit and the second slag pit are 2500mm, × 5000mm and 5000 mm.
And optimally, grouting and pouring the gaps between the steel plates and the rail mounting foundation and the gaps between the steel plates and the ground foundation. The gap between the steel plate and the foundation is grouted and poured by the optimized scheme, so that the stability of fixing the steel plate is further improved.
The invention has the beneficial effects that: based on the condition that the space and the foundation under a small and medium-sized converter are narrow, a first slag pit for temporarily storing steel slag and a second slag pit for a molten steel accident are manufactured at the steel tapping position and the slag receiving position on the two sides under the converter, a slag car is operated to push the steel slag to the temporary storage pit firstly in the slag pushing process, and then the steel slag is shoveled and transported to a slag-crossing slag stewing pool through a loader in a centralized manner, so that the carrying load of the slag car is reduced, and the purpose of stable production is achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
shown in the figure:
1. the device comprises a converter, 2, a ladle car, 3, a first slag pit, 4, a second slag pit, 5 and a ladle car.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
In the embodiment, slag pits are respectively manufactured on the inner sides of the track foundation of the lower part of the steel tapping position behind the furnace and the lower part of the slag receiving position in front of the furnace, so that the purposes of pre-storing steel slag and accident steel pits are achieved, the steel slag under the steel tapping position and the converter of each furnace is pushed to the slag pit at the slag receiving position in front of the furnace by a slag scraper, the slag pit at the slag receiving position is cleaned by a forklift when the pit is full to a certain degree, and the slag pit at the steel tapping position is thoroughly cleaned if a furnace shutdown time sequence exists.
Specifically, referring to fig. 1, a method for cleaning steel slag under a converter comprises the following steps:
a. a first slag pit 3 positioned at a slag receiving position and a second slag pit 4 positioned at a steel tapping position are manufactured on the inner side of a lower track of the furnace, the first slag pit is used for pre-storing steel slag, the second slag pit is used for receiving accident molten steel, all splashing slag generated in normal production of the converter 1 enters the second slag pit, and a slag ladle car 2 scrapes steel slag bodies on the side of the slag pits to the first slag pit at the slag receiving position in each furnace through a slag scraper;
b. when tapping, the ladle car 5 stops above the second slag pit, the second slag pit is used for receiving splashed molten steel when the molten steel is poured, the influence of steel slag formed by the splashed molten steel on the movement of the ladle car and the ladle car is reduced, when the steel ladle penetrates through the steel and leaks, the second slag pit is used for receiving the molten steel, the lower track of the furnace and the installation foundation are not damaged, the normal walking of the two cars is ensured, and the loss is reduced to the minimum;
c. when slag is discharged, pouring the steel slag into a slag ladle car stopped above the first slag pit or directly pouring the steel slag into the first slag pit; when the buggy ladle does not work, the steel slag is poured into the buggy ladle standing above the first slag pit, the buggy ladle transports the steel slag out by utilizing the working gap of the buggy ladle, the steel slag is directly poured into the first slag pit when the buggy ladle transports the molten steel, and the first slag pit is utilized to pre-store the steel slag, so that the rhythm of cleaning the steel slag is effectively relieved, and the stable operation of production is ensured;
d. in the moving process of the ladle car, the slag scraper arranged on the ladle car scrapes the steel slag right below the converter to the first slag pit, so that the slag scraping distance of the slag scraper is greatly shortened, the walking resistance of the ladle car is greatly reduced, the slag conveying stability is improved, and the safety production is guaranteed;
e. when the volume of the steel slag in the first slag pit is greater than or equal to 4/5 of the volume of the first slag pit, a loader is used for cleaning the first slag pit to ensure that no steel slag body exists in the area below the furnace body, and when the furnace is shut down, the steel slag in the second slag pit is cleaned; the loader is used for conveying the steel slag in the first slag pit to the slag-crossing slag stewing pool in a centralized manner, so that the carrying load of the slag ladle vehicle is reduced, the purpose of stable production is achieved, the steel slag in the second slag pit is cleaned when the furnace is shut down, the normal production is not influenced, and the use function of the second slag pit is ensured.
As concrete implementation mode, the pit bottom and the pit lateral wall in first slag pit and the second slag pit of this embodiment all are equipped with the steel sheet that thickness is 22~30mm, wear to be equipped with the bar planting that extends in the rail installation basis on the steel sheet, and the one end and the steel sheet parallel and level that the rail installation basis was kept away from to the bar planting have seted up the welding groove on the steel sheet, and the bar planting welds with the steel sheet. Gaps between the steel plate and the rail mounting foundation and gaps between the steel plate and the ground foundation are filled with thin materials by using high-temperature-resistant grouting materials, grouting and pouring are achieved, and stability of the steel plate is improved.
The sizes of the upper openings of the first slag pit and the second slag pit are 2500mm × 5000mm, the depth of the first slag pit is 900mm, the included angle between the pit side walls at two ends of the first slag pit along the extension direction of the furnace lower track and a vertical plane is 45 degrees, the size of the upper opening of the first slag pit is larger than that of the lower opening, the depth of the second slag pit is 600mm, the included angle between the pit side walls at two ends of the second slag pit along the extension direction of the furnace lower track and the vertical plane is 45 degrees, and the size of the upper opening of the second slag pit is larger than that of the lower opening.
The method has the advantages of simple implementation and operation, environmental protection and economy, convenient and quick steel slag cleaning, and capability of preventing accident molten steel from damaging rails and foundations, greatly reducing the running resistance of the ladle car, providing practical safety guarantee for converter smelting and laying a favorable foundation for clean production.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and 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 changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (6)
1. A method for cleaning steel slag under a converter is characterized by comprising the following steps:
a. manufacturing a first slag pit at a slag receiving position and a second slag pit at a steel tapping position on the inner side of a furnace lower rail;
b. when tapping, the ladle car is still above the second slag pit, the second slag pit is used for receiving splashed molten steel when the molten steel is poured, and when the steel ladle penetrates through the steel and leaks, the second slag pit is used for receiving the molten steel;
c. when slag is discharged, pouring the steel slag into a slag ladle car standing above the first slag pit or directly pouring the steel slag into the first slag pit;
d. in the moving process of the ladle car, steel slag right below the converter is scraped to a first slag pit through a slag scraper arranged on the ladle car;
e. when the volume of the steel slag in the first slag pit is greater than or equal to 4/5 of the volume of the first slag pit, the first slag pit is cleaned by using a loader, and when the furnace is shut down, the steel slag in the second slag pit is cleaned.
2. The method for cleaning the steel slag under the converter according to claim 1, wherein the method comprises the following steps: the pit bottom and the pit lateral wall in first slag pit and second slag pit all are equipped with the steel sheet that thickness is 22~30mm, wear to be equipped with the bar planting that extends in the rail installation basis on the steel sheet, and the bar planting welds with the steel sheet.
3. The method for cleaning the steel slag under the converter according to claim 2, wherein the method comprises the following steps: the one end and the steel sheet parallel and level of rail installation basis are kept away from to the bar planting, and have seted up welding groove on the steel sheet.
4. The method for cleaning the steel slag under the converter according to claim 2, wherein the method comprises the following steps: the depth of the first slag pit is 800-900 mm, the included angle between the pit side walls at two ends of the first slag pit along the extension direction of the furnace lower track and a vertical plane is 45-50 degrees, and the size of an upper opening of the first slag pit is larger than that of a lower opening; the depth of the second slag pit is 500-600 mm, the included angle between the pit side wall at two ends of the second slag pit along the extension direction of the furnace lower track and a vertical plane is 45-50 degrees, and the size of an upper opening of the second slag pit is larger than that of a lower opening.
5. The method for cleaning steel slag under the converter according to claim 4, wherein the sizes of the upper openings of the first slag pit and the second slag pit are 2500mm × 5000mm and 5000mm respectively.
6. The method for cleaning the steel slag under the converter according to claim 2, wherein the method comprises the following steps: and grouting and pouring the gaps between the steel plates and the rail mounting foundations and the gaps between the steel plates and the ground foundations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370092.8A CN111349744A (en) | 2020-05-06 | 2020-05-06 | Method for cleaning steel slag under converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010370092.8A CN111349744A (en) | 2020-05-06 | 2020-05-06 | Method for cleaning steel slag under converter |
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| Publication Number | Publication Date |
|---|---|
| CN111349744A true CN111349744A (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010370092.8A Pending CN111349744A (en) | 2020-05-06 | 2020-05-06 | Method for cleaning steel slag under converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105510A (en) * | 2021-12-31 | 2022-03-01 | 山东泰山钢铁集团有限公司 | Method for producing cement additive by utilizing metallurgical solid waste |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06330112A (en) * | 1993-05-21 | 1994-11-29 | Nippon Steel Corp | Device and method for treatment of slag |
| CN203863007U (en) * | 2014-06-05 | 2014-10-08 | 方大特钢科技股份有限公司 | Automatic slag cleaning-up device of steel/slag ladle cart railways |
| CN206109446U (en) * | 2016-11-15 | 2017-04-19 | 中天钢铁集团有限公司 | Sediment way protector under converter stove |
| CN106702078A (en) * | 2016-12-19 | 2017-05-24 | 中冶京诚工程技术有限公司 | Converter charging device and converter charging method |
| CN206244828U (en) * | 2016-12-19 | 2017-06-13 | 中冶京诚工程技术有限公司 | Converter charging device |
-
2020
- 2020-05-06 CN CN202010370092.8A patent/CN111349744A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06330112A (en) * | 1993-05-21 | 1994-11-29 | Nippon Steel Corp | Device and method for treatment of slag |
| CN203863007U (en) * | 2014-06-05 | 2014-10-08 | 方大特钢科技股份有限公司 | Automatic slag cleaning-up device of steel/slag ladle cart railways |
| CN206109446U (en) * | 2016-11-15 | 2017-04-19 | 中天钢铁集团有限公司 | Sediment way protector under converter stove |
| CN106702078A (en) * | 2016-12-19 | 2017-05-24 | 中冶京诚工程技术有限公司 | Converter charging device and converter charging method |
| CN206244828U (en) * | 2016-12-19 | 2017-06-13 | 中冶京诚工程技术有限公司 | Converter charging device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105510A (en) * | 2021-12-31 | 2022-03-01 | 山东泰山钢铁集团有限公司 | Method for producing cement additive by utilizing metallurgical solid waste |
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Application publication date: 20200630 |
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| RJ01 | Rejection of invention patent application after publication |