CN113523256B - Method and device for rapidly improving cleanliness of covered steel ladle - Google Patents
Method and device for rapidly improving cleanliness of covered steel ladle Download PDFInfo
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- CN113523256B CN113523256B CN202110864296.1A CN202110864296A CN113523256B CN 113523256 B CN113523256 B CN 113523256B CN 202110864296 A CN202110864296 A CN 202110864296A CN 113523256 B CN113523256 B CN 113523256B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/001—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like devices for cleaning ladles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
A method for rapidly improving the cleanliness of a steel ladle with a cover belongs to the technical field of steel ladle maintenance. The method comprises the following steps of removing the slag at the ladle opening: enabling a ladle opening of a ladle to face downwards through a crown block, enabling an included angle between a central line of the ladle and a ground vertical line to be 133-137 degrees, enabling the ladle with a ladle cover to fall into the top end of a slag scraper from the upper part of the slag scraper, returning to 5-10 degrees when a scraper of the slag scraper is close to a slagging position of the ladle opening, enabling the scraper to prop against the ladle opening to carry out slag scraping operation after slagging, enabling the ladle opening to continue to ascend after slagging and shedding, hoisting the ladle to withdraw after the position of the ladle cover is higher than the slag scraper, and completing the slag removing operation of the ladle opening of the ladle cover. The method realizes the cleanliness of the ladle with the cover, ensures the cleanliness at each heat through institutional measures, and simultaneously realizes rapid and continuous production.
Description
Technical Field
The application relates to the technical field of ladle maintenance, in particular to a method and a device for rapidly improving the cleanliness of a ladle with a cover.
Background
The whole-process steel ladle capping technology has the advantages of good steel ladle heat insulation effect, capability of greatly reducing the tapping temperature in front of a furnace, reduction of temperature drop in the steel ladle process, reduction of smelting production cost and the like, and is widely used. However, in the operation of carrying and loading molten steel by the steel ladle with the cover, steel slag is easy to enrich at the ladle opening, so that the slag bonding at the ladle opening is serious, and the quality of the molten steel is seriously influenced; in addition, the temperature in the ladle is too high, liquid slag cannot be poured completely in one time in a short time, the liquid slag is easy to flow back to block the air permeable core and the nozzle brick, hidden dangers are brought to continuous stable production, the cleanliness in the ladle with the cover brings great difficulty to the whole covering operation, and the problem of how to ensure the cleanliness of the ladle with the cover and quick and continuous production is also an urgent need to be solved in steel plant production.
To ensure the cleanliness of the ladles and the rapid and continuous production of the ladles, steel mills generally adopt 2 approaches for treatment: firstly, the liquid slag of the ladle is prevented from flowing back, and secondary steel slag dumping is carried out after the ladle is subjected to hot repair, so that the situation that the air permeable core is blocked by the liquid slag and a water gap is seated is ensured. And secondly, deslagging the ladle opening by using a slag scraper. After the travelling crane is used for uncovering the ladle, the hanging ladle is rotated by 180 degrees from vertical placement to inverted placement, the scraper structure at the top of the ladle opening slag scraper is used for cleaning ladle opening slag at 90 degrees and 180 degrees after the ladle is lifted, and then the ladle is covered and put into use.
The above method has the following disadvantages: firstly, a steel plant ladle-free tilting platform uses a crown block to hang a ladle to tilt secondary steel slag, and is difficult to completely tilt completely under the condition of slagging at a ladle opening, so that the possibility of backflow blockage still exists. And secondly, in the process of using the ladle opening slag scraper, the ladle cover still needs to be removed, so that much inconvenience is brought to the actual field production, the time is long in the process of covering and uncovering the ladle, and the travelling efficiency and the travelling production rhythm are greatly influenced because the traditional covering and uncovering mode needs 15-20 min.
The first prior art is as follows: the ladle opening skin accumulated slag cleaner is characterized in that the slag cleaning head is made of steel billets and is vertically installed on a cleaner base, the top of the slag cleaning head is wedge-shaped, the ladle opening skin accumulated slag cleaner adopts the slag cleaning head to clean accumulated slag at a ladle opening, the accumulated slag is immediately cleaned after pouring of a ladle and pouring of residual slag, the cleaning efficiency is high, and the cleaning time is 1-3 minutes; the steel ladle capping device does not need to be taken down, the steel ladle capping rate is improved, the steel ladle capping process effect is guaranteed, the structure is simple and firm, the steel ladle capping device is not easy to damage, mechanical and electrical devices are not needed, the maintenance cost is avoided, and the manufacturing cost is low.
The second prior art is: the crown block can display the weight of the steel ladle with the cover when the crown block lifts the trunnions at the two sides of the steel ladle with the cover during deslagging, when the crown block hooks the auxiliary hook to slowly tip the steel ladle, the weight displayed on the crown block can be reduced, when the tip angle is close to a theoretical limit value, the auxiliary hook stops lifting, deslagging is completed, the environmental quality of a steel-making area is obviously improved, and the slag-pouring device has wide market requirements and development prospects.
However, the above patent only relates to deslagging or cleaning slag bonding at the mouth of the ladle, does not relate to how to rapidly improve the cleanliness of the ladle with the cover, and does not provide a solution for rapidly improving the cleanliness of the ladle with the cover by matching and connecting deslagging processes and simultaneously realizing rapid and continuous production.
In light of the above problems, improvements are urgently needed for methods for improving the cleanliness of covered ladles while ensuring continuous and rapid production, so that the cleanliness of covered ladles is ensured by institutional measures at each heat, and rapid and continuous production is realized.
Disclosure of Invention
The embodiment of the application aims to provide a method and a device for quickly improving the cleanliness of a ladle with a cover, so that the cleanliness of the ladle with the cover is ensured by institutional measures, and meanwhile, quick and continuous production is realized.
The application is realized as follows:
in a first aspect, the examples of the present application provide a method for rapidly improving the cleanliness of a covered ladle, including lifting the ladle to a steel slag dumping position after casting, starting to dump slag for the first time, returning the ladle for the first time after meeting the online use condition, lifting the ladle to a hot repair platform seat for bag seating; and/or commanding the crown bar to lift the ladle from the hot repair platform again for secondary deslagging; and/or carrying out the slag removing operation of the ladle mouth, wherein the slag removing operation of the ladle mouth comprises the following steps: enabling a ladle opening of a ladle to face downwards through a crown block, enabling an included angle between a central line of the ladle and a ground vertical line to be 133-137 degrees, enabling the ladle with a ladle cover to fall into the top end of a slag scraper from the upper part of the slag scraper, returning to 5-10 degrees when a scraper of the slag scraper is close to a slagging position of the ladle opening, enabling the scraper to prop against the ladle opening to carry out slag scraping operation after slagging, enabling the ladle opening to continue to ascend after slagging and shedding, hoisting the ladle to withdraw after the position of the ladle cover is higher than the slag scraper, and completing the slag removing operation of the ladle opening of the ladle cover.
In some examples, when the ladle is hoisted to the hot repair platform base for ladle seating, the included angle between the central line of the ladle and the vertical line of the ground is 93-97 degrees.
In some examples, the included angle between the ladle center line of the ladle for pouring the steel slag and the ground vertical line is controlled to be 115-124 degrees during the primary deslagging.
In some examples, the included angle between the ladle center line of the ladle into which the steel slag is poured and the ground vertical line is increased by 8 ° to 12 ° in comparison with the included angle between the ladle center line of the ladle into which the steel slag is poured and the ground vertical line in the secondary deslagging.
In some examples, the time for hoisting the steel ladle to a steel slag dumping position after the steel ladle is cast is controlled to be a first preset time, and the first preset time is 5-7 min; and controlling the time from the beginning of primary slag pouring to the end of hoisting to the hot repair platform base for ladle filling to be within a second preset time, wherein the second preset time is less than or equal to 3min, and the primary slag pouring accounts for 96-99 wt% of the total slag pouring.
In some examples, the secondary deslagging time is controlled to be a third preset time, and the third preset time is less than or equal to 1min and less than or equal to 3 min; and controlling the operation time of slag formation removal of the ladle opening of the ladle to be fourth preset time, wherein the fourth preset time is less than or equal to 5 min.
In some examples, after the slag removing operation of the ladle opening of the ladle with the cover is completed, the crown block ascends the main hook to perform ladle body correction of the ladle, an included angle between the central line of the ladle and the vertical line of the ground is controlled to be less than or equal to 50 degrees, then the auxiliary hook is removed, the ladle body correction time of the ladle is controlled to be a fifth preset time, and the fifth preset time is less than or equal to 1 min.
In some examples, the ladle is aligned for the first time by an angle between the ladle centerline and the ground vertical line that is 28 ° to 32 ° smaller than an angle between the ladle centerline and the ground vertical line of the ladle that is poured with steel slag at the time of the primary deslagging.
In a second aspect, the present application provides a device for rapidly improving the cleanliness of a covered ladle, for use in the above method, the slag scraper comprising: the device comprises a base, a vertical upright rod, a scraper and a supporting piece; the vertical upright rod is supported by a supporting piece, the scraper comprises an arc scraping edge and a straight edge, the scraper is horizontally and fixedly connected to the top of the vertical upright rod, the height of the vertical upright rod is larger than that of the ladle cover, and the limit width of the scraper is smaller than the maximum opening distance between the ladle cover and the ladle opening.
The beneficial effect of this application includes:
through the mode cooperation of twice deslagging and variable-angle slag-bonding scraping of the ladle opening, institutionalized measures ensure the cleanliness at each heat, avoid operation deviation caused by empirical operation of deslagging and slag scraping at each time, and realize rapid and continuous production. Further, the hot-repair platform base is obliquely arranged when the base bag is placed, so that the slag pouring process can be performed twice closely, the slag pouring effect can be enhanced for the second time, the slag pouring time can be shortened for the second time, and the production can be performed quickly. Furthermore, the angles of primary deslagging and secondary deslagging are strictly controlled, primary deslagging small angles and secondary deslagging large angles are adopted for control, the total deslagging time is favorably shortened, the deslagging amount and the deslagging time are reasonably distributed, measures such as inclined placement when the hot repair platform base is used for seat covering are matched, and a cleaner deslagging effect is achieved. Furthermore, the time for pouring slag and the time for removing the slag are modulated, the time is matched with the angles for pouring slag and removing slag, the time for pouring slag and removing slag is strictly controlled according to the characteristics of pouring slag and removing slag, the amount of pouring slag is reasonably distributed every time, the continuity of the process of pouring slag and removing slag and the control of the amount of pouring slag are ensured, the process of pouring slag and removing slag is smoothly connected, and the continuous and rapid production is ensured to be smoothly carried out.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic view of a slag scraper;
fig. 2 is a schematic view of ladle tilting.
Icon: 1-a base; 2-vertical upright stanchions; 3-a scraper; 4-arc scraping; 5-straight side; 6-a support member; 7-steel ladle; 8-covering; s1-ladle center line; s2-ground vertical line.
Detailed Description
In the application, a method for rapidly improving the cleanliness of the steel ladle with the cover is provided based on the cleaning of the steel ladle with the cover, so that the improvement of the cleanliness of the steel ladle with the cover and the continuous production are realized.
A description of a method for rapidly improving the cleanliness of a covered ladle is presented below in conjunction with a slag scraper and ladle tilt schematic (fig. 1-2).
The ladle returns to the converter after tapping from the converter, refining furnace and continuous casting, and then goes off-line from the continuous casting to the nozzle operation area, and finally the whole process of ladle operation is covered, the ladle adopts the operation state with the cover in the whole process, the temperature loss of the ladle is small, and the production cost is reduced. However, the space between the ladle cover and the ladle edge is too small, and when the ladle is too much stuck from the converter or the refining furnace, such as the ladle edge is too long, and if the ladle edge is not cleaned in time, the ladle cannot be normally covered, so that slag accumulated on the ladle edge needs to be cleaned in time. However, because slag accumulation on the edge of the ladle is very difficult to clean after the ladle is covered, if the ladle cover is taken off after slag is cleaned every time, and the ladle cover is added after the slag is cleaned, the influence on the production rhythm is great, the whole-process covering of the ladle cannot be realized, and the production is also seriously influenced. When the covered steel ladle is subjected to deslagging, a deslagging process operation is adopted for discharging clean steel slag, the deslagging process can be controlled to be beneficial to clearing accumulated slag of the ladle cover, and meanwhile, the continuous production is guaranteed.
The application example provides a method for rapidly improving the cleanliness of a covered steel ladle, which comprises the steps of hoisting a steel ladle 7 after casting, pouring slag once at a steel slag pouring position, observing and judging steel ladle slag line bricks, ladle opening slagging conditions and the like to carry out preliminary judgment after meeting online use conditions and turning out the online use conditions after no slag exists in the steel ladle. The ladle 7 is corrected for the first time, the ladle is lifted to the hot repair platform seat for seating, the included angle between the ladle center line S1 of the ladle 7 for pouring steel slag and the ground vertical line S2 is reduced by 28-32 degrees when the included angle between the ladle center line S1 and the ground vertical line S2 of the ladle 7 is compared with the included angle for pouring the slag for the first time, the included angle can be selected to be 28 degrees, 29 degrees, 30 degrees, 31 degrees, 32 degrees and the like, the included angle between the ladle center line S1 and the ground vertical line S2 is larger than 90 degrees when the ladle 7 is corrected for the first time, the ladle in the hoisting process can be used for inclining, the steel slag collecting time can be prolonged, the slag pouring effect for pouring for the second time can be improved, and the cleanliness is improved.
When the slag is poured for one time, the included angle between the ladle center line S1 of the ladle 7 for pouring the steel slag and the ground vertical line S2 is controlled to be 115 degrees to 124 degrees, and can be selected from 115 degrees, 116 degrees, 117 degrees, 118 degrees, 119 degrees, 120 degrees, 121 degrees, 122 degrees, 123 degrees, 124 degrees and the like.
And hoisting to the hot repair platform base to hoist the ladle 7 to the steel slag dumping position after casting, wherein the time for the ladle 7 to be hoisted to the steel slag dumping position is controlled within a first preset time which is 5-7 min, and the first preset time is strictly controlled within the lower range, so that the aim of reducing the probability of slag bonding in the ladle can be fulfilled.
The time from the initial slag pouring to the hoisting to the hot repair platform base for the seat ladle ending is controlled to be within a second preset time which is less than or equal to 3min, the primary slag pouring accounts for 96wt% -99 wt% of the total slag pouring, and can be selected from 96wt%, 97 wt%, 98 wt%, 99wt% and the like, the primary slag pouring is large, but in order to pour the slag cleanly, the long-time slag pouring operation is adopted, the process is not favorable for shortening, part of slag pouring tasks in the step can be left for the subsequent process, the slag pouring time is controlled to be within a low range, and the whole process is favorably and smoothly carried out.
When the ladle is seated, the included angle between the central line S1 of the ladle and the ground vertical line S2 is 93 degrees to 97 degrees, and 93 degrees, 94 degrees, 95 degrees, 96 degrees, 97 degrees and the like can be selected. The rear end of a ladle frame of the hot repair platform is lifted by 100mm, so that the ladle is changed from the original 90 degrees of horizontal lying to a ladle bottom-up state, the hot repair operation is not influenced, and meanwhile, the step time can be utilized, so that the liquid slag in the ladle flows out from the lower position of the ladle opening or is collected to the ladle opening as much as possible, the liquid slag amount in the ladle is further reduced, and the secondary slag pouring time is shortened.
Commanding the crown cap to lift the ladle 7 from the hot repair platform again for secondary deslagging; during secondary deslagging, the included angle between the ladle center line S1 of the ladle 7 for dumping the steel slag and the ground vertical line S2 is increased by 8 degrees to 12 degrees compared with the included angle between the ladle center line S1 of the ladle 7 for dumping the steel slag and the ground vertical line S2 during primary deslagging, the included angle can be selected to be 8 degrees, 9 degrees, 10 degrees, 11 degrees, 12 degrees and the like, and exemplarily, the secondary deslagging angle can be selected to be 126 degrees to 136 degrees and the like, and can be selected to be 126 degrees, 127 degrees, 128 degrees, 129 degrees, 130 degrees, 131 degrees, 132 degrees, 133 degrees, 134 degrees, 135 degrees, 136 degrees and the like. The secondary deslagging adopts large-angle deslagging, so that the deslagging effect can be improved, the deslagging time is shortened, and the safety of inspectors is improved; the secondary deslagging time is controlled to be a third preset time, the third preset time is less than or equal to 1min and less than or equal to 3min, and the third preset time can be selected to be 1min, 2min, 3min and the like; the pouring amount of the steel slag and the collection of the steel slag in the process are effectively controlled through the operations of primary deslagging, ladle tilting and the like, and the reasonable deslagging system of secondary deslagging is matched by utilizing the operations and time control, so that the quick deslagging of the ladle mouth can be ensured, and the optimal deslagging operation time can be created. The time before the slag removing operation of the ladle opening is controlled to be as short as possible, the slag is completely removed, the problems that the temperature is low and the slag is difficult to remove and the like during the slag removing operation of the ladle opening can be avoided, and the problems that steel slag is reserved and the slag at the ladle opening is increased and the like during the slag removing operation of a covered ladle are also avoided.
And then carrying out the slag removing operation of the ladle opening, wherein the slag removing operation of the ladle opening comprises the following steps: the ladle mouth of the ladle is downward through a crown block, the included angle between the central line S1 of the ladle and the ground vertical line S2 is 133-137 degrees, and can be selected to be 133 degrees, 134 degrees, 135 degrees, 136 degrees, 137 degrees, and the like, the ladle 7 with the ladle cover 8 falls into the top end of the slag scraper from the upper part of the slag scraper, when the scraper 3 of the slag scraper is close to the slagging position of the ladle mouth, the steel ladle mouth is corrected to be 5-10 degrees, and can be selected to be 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees, and the like, the scraper 3 is pushed to the ladle mouth for slagging and then carries out slag scraping operation, after slagging and shedding of the ladle mouth, the crown block continues to rise, and when the position of the ladle cover 8 is higher than the slag scraper, the ladle 7 is hoisted to exit, and the slag removing operation of the ladle mouth with the ladle cover is completed. Through wide-angle hoist and mount ladle, with the ladle cover increase with a mouthful distance, be favorable to scraping in the sediment ware gets into the steel ladle of area lid smoothly fast, can significantly reduce and tear the lid and scrape the sediment time. And then when the scraper 3 of the slag scraper is close to the slagging position of the ladle opening, the operation is returned to the normal position, so that the slagging can be further ensured to be in close contact with the scraper, the slag scraping is completed as smoothly as possible, and the process operation time is shortened. The operation time for removing the slag at the ladle opening of the ladle is controlled to be fourth preset time, and the fourth preset time is less than or equal to 5 min.
After the slag removing operation of the ladle opening of the ladle with the cover is completed, the crown block ascends the main hook to correct the ladle body of the ladle, the included angle between the central line S1 of the ladle and the vertical line S2 of the ground is controlled to be less than or equal to 50 degrees, the auxiliary hook is disengaged, the correcting time of the ladle body of the ladle 7 is controlled to be a fifth preset time, and the fifth preset time is less than or equal to 1 min. The time control can avoid the cover from returning too fast to collide the nozzle to cause the material removal and water blocking.
In a second aspect, the present application provides a device for rapidly improving the cleanliness of a covered ladle, for use in the above method, the slag scraper comprising: the device comprises a base 1, a vertical upright rod 2, a scraper 3 and a supporting piece 6; the base can be by preparation such as steel sheet, and vertical pole setting 2 is supported by support piece 6, and according to specific user demand, vertical pole setting 2 can have different implementation. For example, the vertical upright 2 is a rod-shaped structure or a plate-shaped structure or other implementation forms, and the cross section of the rod body of the vertical upright 2 can be circular, rectangular, oval and the like. The vertical upright 2 may be provided in plurality for support. The support 6 is not particularly limited and may be an obliquely arranged support structure for supporting the vertical upright 2.
The scraper 3 comprises an arc scraping edge 4 and a straight edge 5, the scraper is changed into a semicircle with the same radian as the ladle opening from an anchor type or a circular shape, the straight edge 5 of one side of the scraper close to the ladle cover is parallel, the arc scraping edge 4 is semicircular and can be in closer contact with slag bonding, the slag scraping effect is better, and the straight edge 5 can prevent obstacles from being scraped, touched and pushed down the ladle cover.
The scraper 3 is horizontally and fixedly connected to the top of the vertical upright rod 2, the height of the vertical upright rod 2 is larger than that of the ladle cover 8, and the limit width of the scraper 3 is smaller than the maximum opening distance between the ladle cover 8 and a ladle opening. The size can ensure that the scraper can smoothly enter the ladle with the cover without scraping and colliding with obstacles and jacking the ladle cover.
Specific embodiments are provided below for improved cleanliness with a covered ladle.
Example 1
A method for rapidly improving the cleanliness of a ladle with a cover comprises the steps of controlling the time of lifting a ladle 7 to a steel slag dumping position after casting to be 5min, lifting the ladle 7 to the steel slag dumping position to begin primary deslagging, controlling the included angle between a ladle center line S1 of the ladle 7 dumping the steel slag and a ground vertical line S2 to be 119 degrees, correcting the ladle 7 for the first time, enabling the included angle between a ladle center line S1 and a ground vertical line S2 to be 91 degrees when the ladle 7 is corrected for the first time, lifting the ladle to a hot repair platform seat to seat the ladle, enabling the time of starting primary deslagging to lift the ladle to the hot repair platform seat to seat the ladle to be 2.5min, enabling the primary deslagging amount to be 96wt% of the total deslagging amount, and enabling the included angle between the ladle center line S1 and the ground vertical line S2 to be 97 degrees when the ladle is seated.
Commanding the crown cap to lift the ladle 7 from the hot repair platform again for secondary deslagging; and during secondary deslagging, the secondary deslagging angle is 131 degrees, and the secondary deslagging time is 2 min.
And then carrying out the slag removing operation of the ladle opening, wherein the slag removing operation of the ladle opening comprises the following steps: make ladle package mouth down through the overhead traveling crane, ladle central line S1 is 136 with the contained angle of ground perpendicular line S2, fall into the sediment ware top of scraping from scraping sediment ware 7 of ladle lid 8, when scraper 3 of scraping the sediment ware is close ladle package mouth slagging scorification position, return positive 9, scrape the sediment operation after scraper 3 pushes up ladle package mouth slagging scorification, after ladle package mouth slagging takes off, the overhead traveling crane continues to rise, hoist ladle 7 and withdraw from after being higher than scraping the sediment ware when ladle lid 8 position, accomplish ladle package mouth slagging scorification of ladle lid and clear away the operation. The operation time for removing the slag at the ladle opening of the ladle is 4 min. And (3) after the included angle between the central line S1 of the ladle and the ground vertical line S2 is controlled at 48 degrees, the auxiliary hook is disengaged, and the ladle body correcting time of the ladle 7 is 1 min.
Example 2
A method for rapidly improving the cleanliness of a ladle with a cover comprises the steps of controlling the time of lifting a ladle 7 to a steel slag dumping position after casting to be 6min, lifting the ladle 7 to the steel slag dumping position to begin primary deslagging, controlling the included angle between a ladle center line S1 of the ladle 7 dumping the steel slag and a ground vertical line S2 to be 120 degrees, correcting the ladle 7 for the first time, enabling the included angle between a ladle center line S1 and a ground vertical line S2 to be 92 degrees when the ladle 7 is corrected for the first time, lifting the ladle to a hot repair platform seat to seat the ladle, enabling the time of starting primary deslagging to reach the hot repair platform seat to seat the ladle to be 2min, enabling the primary deslagging amount to be 97 wt% of the total deslagging amount, and enabling the included angle between the ladle center line S1 and the ground vertical line S2 to be 96 degrees when the ladle is seated.
Commanding the crown cap to lift the ladle 7 from the hot repair platform again for secondary deslagging; and during secondary deslagging, the secondary deslagging angle is 132 degrees, and the secondary deslagging time is 1.9 min.
And then carrying out the slag removing operation of the ladle opening, wherein the slag removing operation of the ladle opening comprises the following steps: make ladle package mouth down through the overhead traveling crane, ladle central line S1 is 137 with the contained angle of ground perpendicular line S2, fall into the sediment ware top from scraping sediment ware 7 of ladle lid 8, when scraper 3 of scraping the sediment ware is close ladle package mouth slagging scorification position, just 10 returns, scrape the sediment operation after scraper 3 pushes up ladle package mouth slagging scorification, after ladle package mouth slagging takes off, the overhead traveling crane continues to rise, hoist ladle 7 and withdraw from after being higher than scraping the sediment ware when ladle lid 8 position, accomplish ladle package mouth slagging scorification of ladle lid and clear away the operation. The operation time for removing the slag at the ladle opening of the ladle is 3 min. After the included angle between the central line S1 of the ladle and the ground vertical line S2 is controlled to be 45 degrees, the auxiliary hook is disengaged, and the ladle body righting time of the ladle 7 is 1 min.
The method for rapidly improving the cleanliness of the steel ladle with the cover is used for improving the cleanliness of the steel ladle with the cover and continuously producing the steel ladle with the cover.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described above with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the above detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the present application, all embodiments, implementations, and features of the present application may be combined with each other without contradiction or conflict. In the present application, conventional equipment, devices, components, etc. are either commercially available or self-made in accordance with the present disclosure. In this application, some conventional operations and devices, apparatuses, components are omitted or only briefly described in order to highlight the importance of the present application.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for rapidly improving the cleanliness of a covered ladle comprises the steps of hoisting the ladle to a steel slag dumping position after the ladle is cast, starting primary slag dumping, restoring the ladle for the first time after online use conditions are met, and hoisting the ladle to a hot repair platform seat for ladle seating; commanding the crown block to hoist the ladle from the hot repair platform again to carry out secondary deslagging; and, carry on the ladle and wrap the mouth and form slag and remove the operation, characterized by that, the said ladle and wrap the mouth and form slag and remove the operation and include: enabling a ladle opening of a ladle to face downwards through a crown block, enabling an included angle between a central line of the ladle and a ground vertical line to be 133-137 degrees, enabling the ladle with a ladle cover to fall into the top end of a slag scraper from the upper part of the slag scraper, returning to 5-10 degrees when a scraper of the slag scraper is close to a slagging position of the ladle opening, enabling the scraper to prop against the ladle opening to carry out slag scraping operation after slagging, enabling the ladle opening to continue to ascend after slagging and shedding, hoisting the ladle to withdraw after the position of the ladle cover is higher than the slag scraper, and completing the slag removing operation of the ladle opening of the ladle cover.
2. The method for rapidly improving the cleanliness of a covered ladle according to claim 1, wherein when the ladle is hoisted to a hot repair platform base for seating, the included angle between the central line of the ladle and the vertical line of the ground is 93-97 degrees.
3. The method for rapidly improving the cleanliness of a covered ladle according to claim 1, wherein an angle between a center line of the ladle in which steel slag is poured and the vertical line of the ground is controlled to be 115 ° to 124 ° in the primary deslagging.
4. The method of claim 1, wherein during the secondary deslagging, an included angle between the ladle centerline of the ladle into which the steel slag is poured and the ground vertical line is increased by 8 ° to 12 ° compared to an included angle between the ladle centerline of the ladle into which the steel slag is poured and the ground vertical line during the primary deslagging.
5. The method for rapidly improving the cleanliness of the covered ladle according to claim 1, wherein the time for hoisting the ladle to a steel slag dumping position after the ladle is cast is controlled to be a first preset time, and the first preset time is 5-7 min; and controlling the time from the beginning of primary slag pouring to the end of hoisting to the hot repair platform base for ladle filling to be within a second preset time, wherein the second preset time is less than or equal to 3min, and the primary slag pouring accounts for 96-99 wt% of the total slag pouring.
6. The method for rapidly improving the cleanliness of a covered steel ladle according to claim 1, wherein the secondary deslagging time is controlled to be a third preset time, and the third preset time is 1min or more and is 3min or less; and the operation time for removing the slag at the ladle opening of the ladle is controlled to be fourth preset time, and the fourth preset time is less than or equal to 5 min.
7. The method for rapidly improving the cleanliness of the covered ladle according to claim 1, wherein after the slagging and removing operation of the ladle mouth of the ladle with the cover is completed, a crown block ascends a main hook to perform ladle body returning of the ladle, an included angle between a central line of the ladle and the ground vertical line is controlled to be less than or equal to 50 degrees, then an auxiliary hook is removed, the ladle body returning time of the ladle is controlled to be fifth preset time, and the fifth preset time is less than or equal to 1 min.
8. The method of claim 1, wherein the first alignment of the ladle is a reduction of the angle between the centerline of the ladle and the vertical surface line by 28 ° to 32 ° compared to the angle between the centerline of the ladle and the vertical surface line for the ladle where steel slag is poured during the first deslagging.
9. The method of rapidly increasing the cleanliness of a covered ladle according to claim 1, wherein the skimmer comprises: the device comprises a base, a vertical upright rod, a scraper and a supporting piece; the vertical upright rod is supported by a supporting piece, the scraper comprises an arc scraping edge and a straight edge, the scraper is horizontally and fixedly connected to the top of the vertical upright rod, the height of the vertical upright rod is larger than that of the ladle cover, and the limit width of the scraper is smaller than the maximum opening distance between the ladle cover and the ladle opening.
10. A device for rapidly improving the cleanliness of a ladle with a cover, for use in a method according to any one of claims 1 to 8, wherein the slag scraper comprises: the device comprises a base, a vertical upright rod, a scraper and a supporting piece; the vertical upright rod is supported by a supporting piece, the scraper comprises an arc scraping edge and a straight edge, the scraper is horizontally and fixedly connected to the top of the vertical upright rod, the height of the vertical upright rod is larger than that of the ladle cover, and the limit width of the scraper is smaller than the maximum opening distance between the ladle cover and the ladle opening.
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| CN202110864296.1A CN113523256B (en) | 2021-07-29 | 2021-07-29 | Method and device for rapidly improving cleanliness of covered steel ladle |
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| CN202110864296.1A CN113523256B (en) | 2021-07-29 | 2021-07-29 | Method and device for rapidly improving cleanliness of covered steel ladle |
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| CN113523256B true CN113523256B (en) | 2022-09-02 |
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| CN202212574U (en) * | 2011-07-29 | 2012-05-09 | 新疆八一钢铁股份有限公司 | Slagging-off device for steel ladle |
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| CN113523256A (en) | 2021-10-22 |
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