Spherical bomb feeding device for pure steel calcium treatment

Abstract

The invention discloses a pure steel calcium treatment spherical bomb feeding device which comprises a steel platform, a bomb dropping mechanism and a controller electrically connected with the bomb dropping mechanism, the steel platform is located above a steel ladle, a heat insulation fireproof layer is arranged at the lower end of the steel platform, and a plurality of vertical through holes which are distributed in rows and columns and used for allowing spherical bombs to pass through are formed in the steel platform; the horizontal positions of the vertical through holes are all within the range of the horizontal position of the inner ladle cavity of the steel ladle, and the bomb dropping mechanism is provided with a plurality of bomb dropping ends which are used for dropping bombs to the vertical through holes synchronously. According to the invention, after the bomb dropping mechanism is controlled, a plurality of spherical bombs are synchronously and uniformly dropped into a steel ladle through a plurality of vertical through holes which are distributed in rows and columns, so that the time of a calcium treatment process can be shortened, calcium absorption is promoted, and automation, high efficiency and large scale of calcium treatment can be realized; the heat insulation and fire prevention layer can insulate heat and prevent fire, so that the bomb dropping mechanism is not exposed in molten steel heat radiation baking any more, the bomb dropping mechanism does not deform for a long time, and then reliability is improved.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical steelmaking technology, and particularly relates to a spherical bullet feeding device for treating calcium in pure steel. Background Technology

[0002] Calcium treatment is an essential ladle refining process for pure steel. It typically involves using a wire feeder to feed the cored wire from the top of the ladle through the slag layer at a certain speed and to a certain depth in the molten steel, thereby achieving desulfurization, impurity removal, and improved purity.

[0003] In practical applications, the calcium recovery rate of the wire feeding method is too low (<5%), the calcium treatment effect is unstable, the incidence of faults such as wire breakage, wire slippage and wire running is high, and the dust pollution is large, so it has been widely criticized.

[0004] Currently, patent document CN117660723A discloses a new calcium treatment method, which adopts a uniform bombing method. Specifically, calcium and other low-density alloys are wrapped in a spherical steel shell to make the overall average density greater than the density of molten steel, thereby ensuring that the alloy bomb sinks to the bottom and is released. This ensures deep and uniform feeding, thereby guaranteeing a high calcium recovery rate and completely eliminating the problems of uncontrollable concentration, high failure rate, large iron loss and large amount of smoke and dust in the traditional wire feeding method of calcium treatment.

[0005] However, the special throwing device for spherical calcium bombs in the aforementioned patent documents takes a long time to process calcium because it can only throw spherical bombs one by one; in addition, it is prone to deformation due to the radiation from the molten steel in the ladle and the long cantilever. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a spherical bullet feeding device for pure steel calcium treatment, which can reliably achieve automated, efficient, and large-scale calcium treatment.

[0007] The objective of this invention is achieved through the following technical solution: A spherical bomb feeding device for treating pure steel calcium, comprising: The steel platform is located above the steel ladle. The lower end of the steel platform is equipped with a heat insulation and fireproof layer. The steel platform is provided with several vertical through holes arranged in rows and columns for the passage of spherical bullets. The horizontal position of the several vertical through holes is within the horizontal position of the ladle cavity. The bombing mechanism is equipped with several bombing ends that are used to simultaneously bombard several vertical through holes. The controller is electrically connected to the bomb-throwing mechanism.

[0008] Furthermore, the bombing mechanism includes several ammunition loading modules, several ammunition control and delivery modules for temporarily controlling and releasing spherical projectiles, and several vertically arranged spiral ammunition magazines that cause the spherical projectiles to roll along a spiral line. The spiral ammunition magazines are evenly arranged along the longitudinal direction, the ammunition loading modules are evenly arranged along the longitudinal direction, and the ammunition control and delivery modules are distributed in rows and columns. The ammunition loading module has several ammunition loading ends evenly arranged horizontally. The output end of a spiral ammunition magazine is horizontally connected to all the ammunition loading ends of the ammunition loading module. The ammunition control and release module has a release end located directly above the vertical through hole. One ammunition loading end is connected downward to one release end.

[0009] Furthermore, the spiral magazine is equipped with a spiral groove and a loading hole. The axis of the spiral groove is vertical, the lower end of the loading hole is connected to the upper end of the spiral groove, and the lower end of the spiral groove is connected to the ammunition loading module through an opening and closing component.

[0010] Furthermore, the opening and closing assembly includes a first baffle rotatably connected to the lower end of the spiral magazine; after the first baffle rotates, it blocks the lower end of the spiral groove, and after the first baffle rotates in the opposite direction, it opens the lower end of the spiral groove.

[0011] Furthermore, the upper end of the spiral magazine is provided with a lifting hole; and / or The lower end of the spiral magazine is equipped with several positioning pin holes for the positioning and connecting steel platform.

[0012] Furthermore, the ammunition loading module includes two supports and a laterally extending ammunition loading tube. The two ends of the ammunition loading tube are rotatably connected to the two supports respectively. One end of the ammunition loading tube is connected to the output end of the spiral magazine. A rotation drive mechanism for driving the ammunition loading tube to rotate is provided on the support away from the spiral magazine. The rotation drive mechanism is electrically connected to the controller. The lower part of the ammunition loading tube is provided with a "V" shaped groove along the length direction. The upper part of the ammunition loading tube is provided with several ammunition loading holes that are connected inside and outside along the length direction. A second baffle located in the upper part of the ammunition loading tube is provided on both sides of any ammunition loading hole. Before the ammunition loading tube rotates, several spherical projectiles are sequentially arranged along the length of the "V"-shaped groove. After the ammunition loading tube rotates 180°, the spherical bullets at the corresponding horizontal position of the ammunition loading hole fall from the ammunition loading hole into the ammunition control and delivery module. Any second baffle blocks the spherical bullets on one side of the ammunition loading hole from rolling into the ammunition loading hole.

[0013] Furthermore, the ammunition delivery module includes a frame with an inclined plate located directly below the ammunition loading hole. An electromagnet electrically connected to the controller is located at the lower end of the inclined plate. A bomb release hole is located directly above the vertical through hole at the lower end of the frame. One side of the inclined plate extends downward to directly above the bomb release hole.

[0014] Furthermore, the lower end of the ammunition loading tube is evenly bolted with eye bolts along its length. The ammunition control and delivery module includes a stop block and a connecting rod located on the side of the inclined plate near the ammunition release hole. One end of the stop block and one end of the connecting rod are rotatably connected to the frame around the transverse rotation center line, and the other end of the connecting rod is softly connected to the eye bolts. After the ammunition loading tube rotates 180°, the other end of the stop block rotates onto the downward rolling path of the spherical bullet on the inclined plate; After the ammunition loading tube is reset, the spherical bullet on the inclined plate pushes aside the stop block and rolls downward into the ammunition loading hole.

[0015] Furthermore, the frame is equipped with a grid plate located directly above the bomb release port.

[0016] Furthermore, splash guards are installed around the lower perimeter of the steel platform.

[0017] The beneficial effects of this invention are as follows: Once controlled, the bomb-feeding mechanism synchronously and evenly feeds several spherical bombs into the ladle through several vertically arranged through holes. This reduces the calcium treatment process time, promotes calcium absorption, and facilitates the automation, efficiency, and large-scale application of calcium treatment. At the same time, the heat-insulating and fire-resistant layer can prevent heat and fire, so that the bomb-feeding mechanism is no longer exposed to the heat radiation of molten steel, thus preventing the bomb-feeding mechanism from deforming over a long period of time and improving the reliability of the spherical bomb feeding device for calcium treatment of pure steel. Attached Figure Description

[0018] The invention will now be described in more detail with reference to embodiments and the accompanying drawings. Figure 1 A schematic diagram of the structure of the present invention is shown; Figure 2 A schematic diagram of the bomb-dropping mechanism in this invention is shown; Figure 3 The front view of the bomb-throwing mechanism in this invention is shown; Figure 4 Showing Figure 3 Sectional view at point AA; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0019] Figure label: 100. Steel platform; 310. Spiral magazine; 311. Lifting hole; 312. Loading hole; 313. Spiral groove; 314. First baffle; 315. Positioning pin hole; 320. Ammunition loading module; 321. Support; 322. Ammunition loading swivel tube; 323. Ammunition loading hole; 324. Rotation drive mechanism; 325. "V" groove; 326. Second baffle; 330. Ammunition control and release module; 331. Frame; 332. Inclined plate; 333. Electromagnet; 334. Ammunition release hole; 335. Grating plate; 336. Stop block; 200. Heat insulation and fireproof layer; 300. Ammunition release mechanism; 400. Steel ladle. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] This invention provides a spherical bomb feeding device for treating pure steel calcium, such as... Figure 1-4 As shown, it includes: The steel platform 100 is located above the steel ladle 400. The lower end of the steel platform 100 is provided with a heat insulation and fireproof layer 200. The steel platform 100 is provided with thirty-six vertical through holes arranged in rows and columns for the passage of spherical calcium bombs. The horizontal position of several vertical through holes is within the horizontal position of the inner cavity of the steel ladle 400. The bombing mechanism 300 is equipped with thirty-six bombing ends that are used to simultaneously bomb and bomb to thirty-six vertical through holes. The controller is electrically connected to the bomb-throwing mechanism 300. The controller can be a PCB board equipped with a C51 microcontroller.

[0022] Understandably, once the bomb-feeding mechanism 300 is controlled, it simultaneously and evenly feeds thirty-six spherical calcium bombs into the ladle 400 through thirty-six vertically arranged through-holes. This reduces the calcium treatment process time, promotes calcium absorption, and facilitates the automation, efficiency, and large-scale application of calcium treatment. At the same time, the heat-insulating and fire-resistant layer 200 can provide heat insulation and fire protection, preventing the bomb-feeding mechanism 300 from being exposed to the heat radiation of molten steel. This ensures that the bomb-feeding mechanism 300 does not deform over a long period of time, thereby improving the reliability of the spherical bomb feeding device for pure steel calcium treatment.

[0023] It should be noted that the spherical calcium bomb is actually a pure calcium core encapsulated in a spherical bomb body; the diameter of the vertical through hole can be 10mm larger than the outer diameter of the spherical calcium bomb; the heat insulation and fireproof layer 200 can be an asbestos board laid at the lower end of the steel platform 100 to prevent the steel ladle 400 from burning the bomb-throwing mechanism 300.

[0024] In one embodiment, the bomb-throwing mechanism 300 includes six sets of ammunition loading modules 320, thirty-six sets of ammunition control and throwing modules 330 for temporarily controlling and then throwing spherical calcium bombs, and six sets of vertically arranged spiral ammunition magazines 310 that make the spherical calcium bombs roll along a spiral line. The six sets of spiral ammunition magazines 310 are all evenly arranged in the longitudinal direction, the six sets of ammunition loading modules 320 are all evenly arranged in the longitudinal direction, and the thirty-six sets of ammunition control and throwing modules 330 are arranged in rows and columns. A magazine loading module 320 has six magazine loading ends evenly arranged in the horizontal direction. The output end of a spiral magazine 310 is horizontally connected to all the magazine loading ends of the magazine loading module 320. The magazine control and release module 330 has a release end located directly above the vertical through hole. One magazine loading end is connected downward to one release end.

[0025] In one embodiment, such as Figure 2 and Figure 3 As shown, the spiral magazine 310 is provided with a spiral groove 313 and a loading hole 312. The axis of the spiral groove 313 is vertical. The lower end of the loading hole 312 is connected to the upper end of the spiral groove 313. The lower end of the spiral groove 313 is connected to the ammunition loading module 320 through an opening and closing assembly. Specifically, the opening and closing assembly includes a first baffle 314 rotatably connected to the lower end of the spiral magazine 310. After the first baffle 314 rotates, it blocks the lower end of the spiral groove 313. After the first baffle 314 rotates in the opposite direction, it opens the lower end of the spiral groove 313.

[0026] It is understandable that when the first baffle 314 rotates and blocks the lower end of the spiral groove 313, spherical calcium bullets are filled one by one from the loading hole 312 at the upper end of the spiral groove 313. The spherical calcium bullets will inevitably roll down the spiral groove 313 due to their own weight and automatically arrange themselves inside the spiral groove 313.

[0027] It should be noted that the helix angle of the spiral groove 313 is no greater than 15°. It cannot be too large or too small. If it is too large, it will cause the first baffle 314 to be overloaded and the pressure to be high in the subsequent ammunition loading process. If it is too small, it will not be conducive to the rapid rolling of the spherical calcium bullet.

[0028] In one embodiment, the upper end of the spiral magazine 310 is provided with a lifting hole 311; the lower end of the spiral magazine 310 is provided with a plurality of positioning pin holes 315 for positioning and connecting steel platforms 100.

[0029] In one embodiment, such as Figure 2 , Figure 3 and Figure 4As shown, the ammunition loading module 320 includes two supports 321 and a laterally extending ammunition loading tube 322. The two ends of the ammunition loading tube 322 are rotatably connected to the two supports 321 respectively. One end of the ammunition loading tube 322 is connected to the output end of the spiral ammunition magazine 310. A rotation drive mechanism 324 for driving the ammunition loading tube 322 to rotate is provided on the support 321 away from the spiral ammunition magazine 310. The rotation drive mechanism 324 is electrically connected to the controller. The rotation drive mechanism 324 can be a rotary cylinder. The fixed end of the rotary cylinder is fixedly connected to the support 321 away from the spiral ammunition magazine 310, and the output end of the rotary cylinder is connected to the ammunition loading tube 322. The lower part of the ammunition loading tube 322 is provided with a "V" shaped groove 325 along the length direction. The upper part of the ammunition loading tube 322 is provided with six ammunition loading holes 323 that are connected inside and outside along the length direction. On both sides of any ammunition loading hole 323, a second baffle 326 located in the upper part of the ammunition loading tube 322 is provided vertically. The diameter of the ammunition loading hole 323 is slightly larger than the diameter of the spherical calcium bullet. Before the ammunition loading tube 322 rotates, multiple spherical calcium bombs are sequentially arranged in the "V"-shaped groove 325 along the length direction; After the ammunition loading tube 322 rotates 180°, the spherical calcium bullets at the horizontal position corresponding to the ammunition loading hole 323 fall from the ammunition loading hole 323 into the ammunition control and delivery module 330. Any second baffle 326 blocks the spherical calcium bullets on one side of the ammunition loading hole 323 from rolling to the ammunition loading hole 323.

[0030] Understandably, because the lower part of the ammunition loading tube 322 has a "V"-shaped groove 325 structure, the spherical calcium bullets can roll forward freely. When the first baffle 314 at the lower end of the spiral ammunition magazine 310 is knocked open, the spherical calcium bullets roll into the "V"-shaped groove 325 and fill it. When the angle cylinder drives the ammunition loading tube 322 to rotate 180°, the spherical calcium bullets at the horizontal position corresponding to the ammunition loading hole 323 fall into the ammunition control and delivery module 330 to be released, while the remaining spherical calcium bullets are blocked by the arc-shaped second baffle 326. When the angle cylinder drives the ammunition loading tube 322 to reset, the remaining balls fall back into the "V"-shaped groove 325, and at the same time, the spiral ammunition magazine 310 automatically replenishes the consumed spherical calcium bullets into the "V"-shaped groove 325.

[0031] It should be noted that the ammunition loading tube 322 can be a split type, with its upper and lower parts being detachably connected. The "V"-shaped groove 325 is located on its lower part, while the ammunition loading hole 323 and the second baffle 326 are both located on its upper part.

[0032] In one embodiment, such as Figure 4As shown, the ammunition delivery module 330 includes a frame 331. The frame 331 is provided with an inclined plate 332 located directly below the ammunition loading hole 323. An electromagnet 333 electrically connected to the controller is provided at the lower end of the inclined plate 332. An ammunition loading hole 334 located directly above the vertical through hole is provided at the lower end of the frame 331. One side of the inclined plate 332 extends downward to directly above the ammunition loading hole 334.

[0033] Understandably, when the spherical calcium bomb falls onto the inclined plate 332, it automatically rolls down the inclined plate 332 under the action of gravity; when the spherical calcium bomb rolls to the top of the electromagnet 333, it can be attracted by the electromagnet 333 so that the electromagnet 333 can be used to control the release of the spherical calcium bomb.

[0034] It should be noted that by controlling the corresponding electromagnet 333, the feeding order and time interval of the pairs can be flexibly determined to ensure that feeding is completed in the shortest time and that splashing is not too large.

[0035] It should be noted that the falling height of the spherical calcium bomb needs to ensure that the spherical calcium bomb obtains sufficient kinetic energy upon entering the liquid and can break the slag shell that may exist on the surface of the molten steel before sinking to the bottom. Specifically, it is necessary to control factors such as the height and position of the electromagnet 333.

[0036] It should also be noted that the width and length of the space directly above the bomb hole 334 are slightly larger than the diameter of the spherical calcium bomb, so that the space above it can guide the spherical calcium bomb as it falls, thereby ensuring that the spherical calcium bomb can be fed through the bomb hole 334.

[0037] In one embodiment, the lower end of the ammunition loading tube 322 is uniformly bolted with eye bolts along its length, specifically the eye bolts are installed at the lower end of the "V" groove 325; the ammunition control and delivery module 330 includes a stop block 336 and a connecting rod located on the side of the inclined plate 332 near the ammunition hole 334, one end of the stop block 336 and one end of the connecting rod are rotatably connected to the frame 331 around the transverse rotation center line, and the other end of the connecting rod is softly connected to the eye bolts; After the ammunition loading tube 322 rotates 180°, the other end of the stop block 336 rotates to the downward rolling path of the spherical calcium bullet on the inclined plate 332; After the ammunition loading tube 322 is reset, the spherical calcium bullet on the inclined plate 332 pushes aside the stop block 336 and rolls downward into the ammunition loading hole 334.

[0038] Understandably, this design prevents the spherical calcium projectile from being temporarily secured due to a malfunction of the electromagnet 333. Specifically, the stop block 336 is driven by a connecting rod, the end of which has a hole for a flexible connection to the eye bolt. Under normal circumstances, the pointed bottom of the "V" groove 325 is at the bottom. When loading the projectile, the "V" groove 325 rotates 180° to tighten the stop block 336 via a flexible connection such as a rope, thus serving as the final ball stop. When the spherical calcium projectile needs to be rolled into the molten steel, the loading tube 322 and its "V" groove 325 are reset to release the stop block 336. At this time, the electromagnet 333 is de-energized, and the spherical calcium projectile can push the stop block 336 aside and be loaded into the molten steel through the loading hole 334.

[0039] It should be noted that the position of the spherical calcium bomb on the inclined plate 332 after the stop block 336 blocks it is the same as the position of the spherical calcium bomb on the inclined plate 332 after the electromagnet 333 attracts it, so as to control the release height of the spherical calcium bomb.

[0040] In one embodiment, since the spherical calcium bomb splashes a lot when it is thrown into the molten steel, a grid plate 335 is provided on the frame 331 directly above the bomb throwing hole 334 to allow hot air to pass through and to block the splashing steel.

[0041] It should be noted that the grating plate 335 can be a steel grating structure with an inclination of 45°; in addition, the grating plate 335 can be movable to facilitate the periodic cleaning of the adhering material formed by splashes near the bomb hole 334 after removal, thereby keeping the inclined plate 332 and the inside of the bomb hole 334 basically clean.

[0042] In one embodiment, since the spherical calcium bombs splash far when they are thrown, splash curtains are provided around the lower end of the steel platform 100. The splash curtains can be soft curtains so as not to block the ladle 400 from entering and exiting directly under the steel platform 100, and to block the steel sparks that splash when the bombs are thrown.

[0043] Taking the production of pure steel in a steel plant as an example, the ladle 400 has a bulk density of 210t. Calcium is fed after the LF furnace, with a drop point range of Ф2800mm. The spherical calcium bombs weigh 4kg and have a diameter of 100mm, each containing 75g of pure calcium. Thirty-six vertical through holes are evenly arranged in six rows and six columns on the steel platform 100, with a spacing of 500mm between adjacent vertical through holes. The expected calcium recovery rate is 65%. The calcium input in each heat of steel is 2.7kg, and the expected calcium content in the finished product is 8ppm. Each spiral bomb chamber 310 can hold 120 spherical calcium bombs, and one replacement of the spherical calcium bombs allows for the continuous production of 20 heats of steel. In addition, the diameter of the vertical through hole is preferably 110mm, an asbestos board with a thickness of 100mm is set under the steel platform 100, and three layers of iron chains are set around the steel platform 100 as soft chains. The falling height of the spherical calcium bomb needs to be more than 2.5 meters; the helix angle of the spiral groove 313 is preferably 4°.

[0044] In summary, because all the spherical calcium bombs are arranged in advance, the present invention can feed the steel ladle 400 as soon as it stops, which can greatly save the waiting time of the steel ladle 400. According to process requirements, the present invention can control the corresponding electromagnet 333 to flexibly determine the order and time interval of group feeding. Compared with the spherical calcium bomb throwing device in the patent document with publication number CN117660723A, the present invention can further reduce feeding time, reduce the dwell time of the ladle 400, reduce the temperature drop of molten steel and increase production efficiency. Compared to the spherical calcium bomb throwing device in the aforementioned patent documents, the throwing mechanism 300 of this invention is not exposed to the heat radiation baking of molten steel, and the device can remain undeformed for a long time, with high reliability. Because the present invention employs a soft curtain to block slag below the steel platform 100 and installs a grating plate 335 above the bomb throwing hole 334, the splashing steel sparks can be controlled within a certain range, and the spherical calcium bomb falling channel can be cleaned regularly. This can prevent safety accidents caused by splashing steel sparks igniting equipment cables or platform debris, and ensure the long-term reliability of the equipment.

[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A spherical bomb feeding device for treating pure steel with calcium, characterized in that, include: A steel platform (100) is located above a steel ladle (400). A heat-insulating and fireproof layer (200) is provided at the lower end of the steel platform (100). The steel platform (100) is provided with a number of vertical through holes arranged in rows and columns for the passage of spherical bullets. The horizontal positions of the vertical through holes are all within the horizontal position range of the inner cavity of the steel ladle (400). A bomb-throwing mechanism (300) is provided with a number of bomb-throwing ends that are used to throw bombs into a number of vertical through holes simultaneously. A controller electrically connected to the bomb-throwing mechanism (300).

2. The spherical bomb feeding device for treating pure steel calcium according to claim 1, characterized in that, The bomb-throwing mechanism (300) includes several bomb-dispensing modules (320), several bomb-throwing control modules (330) for temporarily controlling and then dispensing spherical bombs, and several vertically arranged spiral bomb magazines (310) that cause the spherical bombs to roll along a spiral line. The spiral bomb magazines (310) are evenly arranged along the longitudinal direction, the bomb-dispensing modules (320) are evenly arranged along the longitudinal direction, and the bomb-throwing control modules (330) are arranged in rows and columns. The ammunition loading module (320) is evenly provided with a number of ammunition loading ends in the horizontal direction. The output end of the spiral ammunition magazine (310) is horizontally connected to all the ammunition loading ends of the ammunition loading module (320). The ammunition control and delivery module (330) is vertically provided with the ammunition delivery end located directly above the vertical through hole. The ammunition loading end is downwardly connected to the ammunition delivery end.

3. The spherical bomb feeding device for treating pure steel calcium according to claim 2, characterized in that, The spiral magazine (310) is provided with a spiral groove (313) and a loading hole (312). The axis of the spiral groove (313) is vertical. The lower end of the loading hole (312) is connected to the upper end of the spiral groove (313). The lower end of the spiral groove (313) is connected to the ammunition loading module (320) through an opening and closing component.

4. A spherical bullet feeding device for treating pure steel calcium according to claim 3, characterized in that, The opening and closing assembly includes a first baffle (314) rotatably connected to the lower end of the spiral magazine (310); after the first baffle (314) rotates, it blocks the lower end of the spiral groove (313); after the first baffle (314) rotates in the opposite direction, it opens the lower end of the spiral groove (313).

5. A spherical bomb feeding device for treating pure steel calcium according to any one of claims 2-4, characterized in that, The upper end of the spiral magazine (310) is provided with a lifting hole (311); and / or The lower end of the spiral magazine (310) is provided with several positioning pin holes (315) for positioning and connecting the steel platform (100).

6. A spherical bullet feeding device for treating pure steel calcium according to any one of claims 2-4, characterized in that, The ammunition loading module (320) includes two supports (321) and a laterally extending ammunition loading tube (322). The two ends of the ammunition loading tube (322) are rotatably connected to the two supports (321). One end of the ammunition loading tube (322) is connected to the output end of the spiral magazine (310). A rotation drive mechanism (324) for driving the ammunition loading tube (322) to rotate is provided on the support (321) away from the spiral magazine (310). The rotation drive mechanism (324) is electrically connected to a controller. The lower part of the ammunition distribution tube (322) is provided with a "V" shaped groove (325) along the length direction. The upper part of the ammunition distribution tube (322) is provided with a number of ammunition distribution holes (323) that are connected inside and outside along the length direction. A second baffle (326) located in the upper part of the ammunition distribution tube (322) is provided vertically on both sides of any ammunition distribution hole (323). Before the ammunition loading tube (322) rotates, the "V"-shaped groove (325) sequentially rolls and arranges several spherical projectiles along the length direction; After the ammunition loading tube (322) rotates 180°, the spherical bullets at the horizontal position corresponding to the ammunition loading hole (323) fall from the ammunition loading hole (323) into the ammunition control and delivery module (330). Any of the second baffles (326) prevents the spherical bullets on one side of the ammunition loading hole (323) from rolling to the ammunition loading hole (323).

7. A spherical bomb feeding device for treating pure steel calcium according to claim 6, characterized in that, The ammunition control and delivery module (330) includes a frame (331), on which a ramp (332) is provided directly below the ammunition loading hole (323). An electromagnet (333) electrically connected to the controller is provided at the lower end of the ramp (332). A projectile loading hole (334) is provided at the lower end of the frame (331) directly above the vertical through hole. One side of the ramp (332) extends downward to directly above the projectile loading hole (334).

8. A spherical bullet feeding device for treating pure steel calcium according to claim 7, characterized in that, The lower end of the ammunition loading tube (322) is uniformly bolted with eye bolts along the length direction. The ammunition control and delivery module (330) includes a stop (336) and a connecting rod located on the side of the inclined plate (332) near the ammunition hole (334). One end of the stop (336) and one end of the connecting rod are rotatably connected to the frame (331) around the transverse rotation center line. The other end of the connecting rod is softly connected to the eye bolts. After the ammunition loading tube (322) rotates 180°, the other end of the stop block (336) rotates to the downward rolling path of the spherical bullet on the inclined plate (332); After the ammunition loading tube (322) is reset, the spherical projectile on the inclined plate (332) pushes open the stop block (336) and rolls downward into the ammunition loading hole (334).

9. A spherical bullet feeding device for treating pure steel calcium according to claim 7, characterized in that, The frame (331) is provided with a grid plate (335) located directly above the bomb release hole (334).

10. A spherical bullet feeding device for treating pure steel calcium according to claim 1, characterized in that, Splash curtains are installed around the lower end of the steel platform (100).

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