Manganese-iron alloy continuous casting device and method

Abstract

The invention discloses a manganese-iron alloy continuous casting device and method.The continuous casting device comprises a tundish, a center shaft, a valve assembly, a driving unit and a plurality of casting particle molds, the driving unit is connected with the center shaft, and the tundish, the valve assembly, the driving unit and the casting particle molds are all arranged on the center shaft; the tundish is provided with a water gap sleeve communicated with the interior of the tundish, the water gap sleeve is communicated with the casting mold, the casting mold comprises a mold frame, a fixed mold shell, a movable mold shell and a mold opening and closing cam guide rail, the mold frame is fixedly arranged on the center shaft, the fixed mold shell is fixed on the mold frame, the movable mold shell is rotatably arranged on the mold frame through a rotating shaft, and the mold opening and closing cam guide rail is fixed on the movable mold shell. The fixed mold shell and the movable mold shell are detachably provided with concave mold plates, cooling channels are formed in the concave mold plates, a swing arm is fixed to the bottom end of the rotating shaft, and a mold opening and closing roller corresponding to the mold opening and closing cam guide rail is arranged at the free end of the swing arm. And the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of ferroalloy casting, and in particular to a manganese-iron alloy continuous casting device and method. Background Art

[0002] Ferromanganese is one of the indispensable additives in steel manufacturing. It is mainly composed of two elements, manganese and iron. There are strict requirements for the particle size of ferromanganese. Ferromanganese with too small a particle size will float on the surface of the molten steel and be oxidized and lost by the slag. Ferromanganese with too large a particle size will sink to the bottom of the ladle and cannot be melted evenly, affecting the uniformity of the steel composition. The industry usually sets the production index of ferromanganese as a particle size of 50m-70m. The utilization rate of ferroalloys with this particle size is the highest. When using traditional production processes to produce ferromanganese products of different grades, it is usually by pouring the liquid ferromanganese solution into a fixed cast iron ingot mold, waiting for natural cooling and solidification into a larger block, and then mechanically crushing and manually crushing to obtain small pieces of ferromanganese. This processing method is not only time-consuming and labor-intensive, but also has low production efficiency. In addition, the particle size of the ferromanganese blocks after processing is inconsistent, the crushing and pulverization rate is high, and the pollution to the environment is also relatively serious. Summary of the invention

[0003] The main purpose of the present invention is to overcome the defects of the above-mentioned background technology and provide a manganese-iron alloy continuous casting device and method.

[0004] To achieve the above-mentioned purpose, the manganese-iron alloy continuous casting device proposed in the present invention comprises a tundish, a central shaft, a valve assembly, a driving unit and a plurality of pellet casting molds, wherein the output end of the driving unit is connected to the central shaft, the tundish is fixedly arranged at the top end of the central shaft, the side wall of the tundish is uniformly provided with a plurality of nozzle sleeves connected to the inside of the tundish along the circumferential direction, the valve assembly is arranged on the nozzle sleeve, a plurality of pellet casting molds are uniformly arranged on the outer wall of the central shaft, the outlet end of the nozzle sleeve is connected to the casting The inner cavities of the particle mold are communicated, and the particle casting mold includes a mold frame, a fixed mold shell, a movable mold shell and a mold opening and closing cam guide rail. The mold frame is fixedly arranged on the central axis, the fixed mold shell is fixed on the mold frame, and the movable mold shell is rotatably arranged on the mold frame through a rotating shaft. Both the fixed mold shell and the movable mold shell are provided with a concave mold plate, and a cooling channel is provided inside the concave mold plate. The rotating shaft extends downward through the mold frame, and a swing arm is fixed to the bottom end of the rotating shaft, and a mold opening and closing roller corresponding to the mold opening and closing cam guide rail is provided at the free end of the swing arm. During production, the central axis is driven to rotate by the driving unit, and the tundish, valve assembly and several pellet casting molds rotate synchronously. When the mold opening and closing roller rotates into the mold closing position in the mold opening and closing cam guide rail, the female mold plate is closed to form a pellet casting cavity, and the manganese-iron alloy solution inside the tundish is injected into the female mold plate along the nozzle sleeve to form a pellet casting cavity. There is coolant flowing in the cooling channel for heat exchange, so that the manganese-iron alloy solution is cooled and solidified into solid particles. When the mold opening and closing roller rotates into the mold opening position on the mold opening and closing cam guide rail, the mold opening and closing roller The arm drives the swing arm to rotate, and the swing arm drives the rotating shaft and the movable mold shell to rotate to open the mold, and the manganese-iron alloy particles solidified in the concave mold plate are thrown out, and then the movable mold shell is re-molded to carry out the next round of particle casting, thereby realizing continuous particle casting. When the volume or shape of the manganese-iron alloy particles needs to be changed, only the concave mold plate needs to be replaced. The manganese-iron alloy particles obtained by continuous casting using the manganese-iron alloy continuous casting device of the present invention are not pulverized, have little pollution to the environment, have high particle uniformity, and the particle size of the manganese-iron alloy particles is convenient to change, thereby having high production efficiency.

[0005] Furthermore, the pellet casting mold further comprises a locking shaft, a locking pin, a locking guide rail and a locking roller, the fixed mold shell is provided with at least one notch, the movable mold shell is provided with a convex block corresponding to the notch, the convex block is provided with a pin hole, the locking shaft is provided through the fixed mold shell, the locking roller is provided at the top of the locking shaft and corresponds to the locking guide rail, the locking pin is fixedly provided on the locking shaft and corresponds to the pin hole, the locking shaft can be lifted and lowered on the fixed mold shell and thus drive the locking pin to rise and fall synchronously in the notch, when the mold is closed, the convex block extends into the notch, the locking pin is inserted into the pin hole, so that the fixed mold shell and the movable mold shell are locked. The locking pin is driven to rise and fall vertically by the locking shaft, and then the locking pin is driven to be inserted into or pulled out of the pin hole, so as to close and unlock the mold.

[0006] Furthermore, the valve assembly includes a valve body, a valve stem, a gate plate, a feed roller and a feed guide rail, the valve body is fixedly arranged on the outer side wall of the tundish, the water inlet sleeve is communicated with the valve body, one end of the valve stem is connected with the gate plate, the other end of the valve stem extends to the outside of the valve body and is connected with the feed roller, the valve stem is sleeved with a spring, the feed roller corresponds to the feed guide rail, the gate plate is slidably arranged inside the valve body, and the gate plate has a first state of blocking the water inlet sleeve and a second state of opening the water inlet sleeve.

[0007] Furthermore, the fixed mold shell and / or the movable mold shell is provided with an exhaust hole connected to the concave mold plate.

[0008] Furthermore, the center shaft is rotatably disposed on the central axis within the device shell, and the bottom end extends to the outside of the device shell, a first gear is sleeved on the shaft body of the center shaft located outside the device shell, a second gear is provided on the output shaft of the drive unit, the first gear and the second gear are meshingly connected, a swivel joint is provided at the bottom end of the center shaft, a liquid supply ring and a liquid collecting ring are respectively sleeved on the center shaft, the fixed mold shell and the movable mold shell are respectively provided with a coolant inlet pipe and a return pipe connected to the cooling channel, the coolant inlet pipe is connected to the liquid supply ring, the return pipe is connected to the liquid collecting ring, and the corresponding interfaces on the swivel joint are respectively connected to the liquid supply ring and the liquid collecting ring.

[0009] Furthermore, an air supply ring is sleeved on the central axis, and the air supply ring is connected to an air blowing pipe. An air blowing nozzle is provided at the air outlet end of the air blowing pipe. The jet direction of the air blowing nozzle corresponds to the concave mold plate inside the fixed mold shell and the movable mold shell after the molds are opened, and the corresponding interface on the swivel joint is connected to the air supply ring.

[0010] Furthermore, an induction coil is sleeved on the nozzle sleeve, and the induction coil is electrically connected to a corresponding interface on the rotary joint.

[0011] Furthermore, a third gear is sleeved on the shaft body of the central axis located outside the device shell, a cooling fan is provided on the bottom surface of the device shell, the cooling fan includes a fan shell, a fan shaft and fan blades, the fan shell is fixedly arranged on the bottom surface of the device shell, and the air inlet end is located outside the device shell, and the air blowing end is located inside the device shell, the fan shaft is rotatably arranged in the fan shell, the fan blades are sleeved on the fan shaft, a fourth gear is provided at the bottom of the fan shaft, the third gear and the fourth gear are meshingly connected, a discharge guide plate is provided in the device shell, a discharge port is provided on the side wall of the device shell corresponding to the discharge guide plate, and a plurality of ventilation holes are provided on the discharge guide plate.

[0012] Furthermore, the device shell and the top of the tundish are both set as open structures, and a smoke collecting hood is provided on the upper cover, a smoke duct is connected to the smoke collecting hood, a long water outlet is vertically provided on the smoke collecting hood, the bottom end of the long water outlet extends to the interior of the tundish, and the top end of the long water outlet is connected to the external ladle.

[0013] The present invention also proposes a method for casting pellets using the above-mentioned ferromanganese alloy continuous casting device, comprising the following steps: S1, starting a driving unit to drive the central shaft to rotate, and the tundish connected to the central shaft and a plurality of pellet casting molds rotate synchronously; S2, the external coolant flows through the rotary joint and the liquid supply ring and then enters the cooling channels in the concave mold plates inside the fixed mold shell and the movable mold shell through the coolant inlet pipe for heat exchange, and after the heat exchange, flows back to the liquid collecting ring through the return pipe and flows out of the rotary joint for recovery; S3, the ferromanganese alloy solution enters the intermediate mold through the long water inlet In the bag, the ferromanganese alloy solution is thrown into the water inlet sleeve under the action of centrifugal force. When the opening and closing mold rollers of the pellet casting mold rotate into the mold closing position in the opening and closing mold cam guide rail, the locking pin is inserted into the pin hole to lock the fixed mold shell and the movable mold shell. The internal concave mold plate is enclosed to form a cavity for the ferromanganese alloy casting particles. The feed roller of the valve assembly rotates to the feed guide rail at the same time, and the gate is pulled up by the valve stem to open the water inlet sleeve. The ferromanganese alloy solution in the water inlet sleeve is poured into the cavity formed by the two concave mold plates and is cooled by heat exchange with the coolant flowing through the cooling channel. When the feed After the roller rotates out of the feed guide rail, the valve stem drives the gate to seal the water inlet sleeve under the restoring force of the spring, and the ferromanganese alloy solution continues to rotate with the pellet casting mold and cools and solidifies into solid particles; when the opening and closing mold roller of the pellet casting mold rotates into the mold opening position in the opening and closing mold cam guide rail, the locking roller of the locking mechanism also rotates synchronously into the locking guide rail, and the locking shaft drives the locking pin to be pulled out of the pin hole to unlock, and the opening and closing mold roller drives the swing arm to rotate, and the swing arm drives the rotating shaft and the movable mold shell to rotate to open the mold, and the solidified ferromanganese alloy particles after the mold opening are thrown out under the action of centrifugal force. When the ferromanganese alloy particles are thrown out, the cooling fan on the bottom of the device shell blows the external cold air upward into the interior of the device shell to further cool the thrown ferromanganese alloy particles; S5. The smoke generated during the pelletizing process is discharged from the top of the device shell and collected by the smoke collecting hood, and then led to the external smoke purification treatment equipment through the smoke duct for treatment.

[0014] The beneficial effects of the present invention include: the central axis, the tundish, the valve assembly and a plurality of pellet casting molds are driven to rotate synchronously by a driving unit; when the opening and closing mold rollers of the pellet casting mold rotate into the mold closing position on the opening and closing mold cam guide rail, the concave mold plates on the fixed mold shell and the movable mold shell are molded to form a pellet casting cavity; the manganese-iron alloy solution inside the tundish is injected into the pellet casting cavity along the nozzle sleeve under the action of centrifugal force; at the same time, coolant flows in the cooling channel to exchange heat with the manganese-iron alloy solution in the pellet casting cavity to cool and solidify into solid particles; when the opening and closing mold rollers of the pellet casting mold rotate into the mold opening position on the opening and closing mold cam guide rail, the opening and closing mold rollers drive The swing arm rotates, and the swing arm drives the rotating shaft and the movable mold shell to rotate to open the mold. The manganese-iron alloy particles in the concave mold plate are thrown out under the action of centrifugal force, and then the movable mold shell is re-molded to carry out the next round of particle casting work, thereby realizing continuous particle casting. When the volume or shape of the manganese-iron alloy particles needs to be changed, it is only necessary to replace the concave mold plate. Compared with the existing method of using traditional mold casting + mechanical crushing or manual crushing, the manganese-iron alloy particles produced by the method of casting particles using the manganese-iron alloy continuous casting device of the present invention are basically not pulverized, have little pollution to the environment, have high particle uniformity, and the particle size of the manganese-iron alloy particles is easy to change, and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the installation of a tundish, a center shaft, a drive unit, a pelletizing mold and a nozzle sleeve in an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the connection between the liquid supply ring, the liquid collecting ring and the air supply ring in an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the opening state of the pelletizing mold in an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of the mold closing state of the pelletizing mold in an embodiment of the present invention.

[0019] Figure 5 Schematic diagram of a valve assembly in an embodiment of the present invention.

[0020] Figure 6 1 is an overall schematic diagram of a ferromanganese alloy continuous casting device in an embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of a cutaway device housing in an embodiment of the present invention.

[0022] Reference numerals: 1 tundish; 2 center shaft; 201 first gear; 202 swivel joint; 203 liquid supply ring; 204 liquid collecting ring; 205 air supply ring; 206 air blowing pipe; 207 air blowing nozzle; 208 third gear; 3 valve assembly; 301 valve body; 302 valve stem; 303 gate; 304 feed roller; 305 feed guide rail; 306 spring; 4 drive unit; 401 second gear; 5 pellet casting mold; 501 mold frame; 502 fixed mold shell; 503 movable mold shell; 504 mold opening and closing cam guide rail; 505 rotating shaft; 5 06 concave mold plate; 507 swing arm; 508 opening and closing mold roller; 509 clamping shaft; 510 clamping pin; 511 clamping guide rail; 512 clamping roller; 513 notch; 514 bump; 515 pin hole; 516 exhaust hole; 517 coolant inlet pipe; 518 return pipe; 6 sprue sleeve; 7 device shell; 701 discharge guide plate; 702 discharge port; 703 ventilation hole; 8 cooling fan; 801 fan shell; 802 fan shaft; 803 fan blade; 804 fourth gear; 9 smoke hood; 10 smoke duct; 11 long sprue. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Example 1

[0028] See also Figures 1 to 7The ferromanganese alloy continuous casting device disclosed in the present invention comprises a tundish 1, a central shaft 2, a valve assembly 3, a driving unit 4 and a plurality of pellet casting molds 5. The central shaft 2 is rotatably arranged on the central axis in the device housing 7, and the bottom end thereof extends to the outside of the device housing 7. The central shaft 2 is located outside the device housing 7 and is fixedly sleeved with a first gear 201. A second gear 401 is arranged on the output shaft of the driving unit 4. The first gear 201 and the second gear 401 are meshedly connected. The driving unit 4 is preferably a motor, which drives the central shaft 2 to rotate. The tundish 1 is fixedly arranged on the top end of the central shaft 2. The side wall of the tundish 1 is circumferentially rotated. A plurality of nozzle sleeves 6 are evenly distributed and communicated with the interior of the tundish 1. The valve assembly 3 is arranged on the nozzle sleeve 6 to control the on and off of the interior of the nozzle sleeve 6. A plurality of pellet casting molds 5 are evenly distributed around the outer wall of the central axis 2. The number of the pellet casting molds 5 corresponds to the number of the valve assembly 3. The outlet end of the nozzle sleeve 6 is connected to the inner cavity of the pellet casting mold 5, so that the manganese-iron alloy solution in the nozzle sleeve 6 can enter the pellet casting mold 5 for cooling and pellet casting. The pellet casting mold 5 includes a mold frame 501, a fixed mold shell 502, a movable mold shell 503 and a mold opening and closing cam guide rail 504. The mold frame 501 is horizontally fixed on the outer circumference of the central axis 2. The fixed mold shell 503 is fixed to the outer circumference of the central axis 2. 02 is fixed between the two mold frames 501, the movable mold shell 503 is rotatably arranged between the two mold frames 501 through the rotating shaft 505, and the fixed mold shell 502 and the movable mold shell 503 are both detachably provided with a concave mold plate 506. When the movable mold shell 503 rotates and is molded with the fixed mold shell 502, the two concave mold plates 506 enclose a cavity for forming manganese-iron alloy casting particles, and a cooling channel (not shown) is provided inside the concave mold plate 506, and the cooling channel is connected with the coolant entering from the outside. Specifically, a rotary joint 202 is provided at the bottom end of the central axis 2, and a liquid supply ring 203 and a liquid collecting ring 204 are respectively sleeved on the central axis 2. The fixed mold shell 502 and the movable mold shell 503 are A coolant inlet pipe 517 and a return pipe 518 connected to the cooling channel are respectively provided. The coolant inlet pipe 517 is connected to the liquid supply ring 203, and the return pipe 518 is connected to the liquid collecting ring 204. The corresponding interfaces on the rotary joint 202 are respectively connected to the liquid supply ring 203 and the liquid collecting ring 204. The external coolant enters the cooling channel along the rotary joint 202, the liquid supply ring 203, and the coolant inlet pipe 517 for heat exchange. The heat medium generated after the heat exchange is discharged to the outside of the manganese-iron alloy continuous casting device along the return pipe 518, the liquid collecting ring 204, and the rotary joint 202, so that the heat of the heat medium after the heat exchange can be recovered and used;The rotating shaft 505 extends downward through the mold frame 501, and a swing arm 507 is horizontally fixed at the bottom end of the rotating shaft 505. A mold opening and closing roller 508 corresponding to the mold opening and closing cam guide 504 is provided at the free end of the swing arm 507. Specifically, after the fixed mold shell 502 and the movable mold shell 503 are molded, the concave mold plate 506 encloses a cavity for manganese-iron alloy casting particles, and the fixed mold shell 502, the movable mold shell 503 and the concave mold plate 506 are provided with a water supply port sleeve 6 to inject manganese-iron alloy solution into the cavity. A vent hole 516 connected to the concave mold plate 506 is provided on the fixed mold shell 502 and / or the movable mold shell 503. When the water inlet sleeve 6 injects manganese-iron alloy solution into the cavity enclosed by the concave mold plate 506, the air in the cavity can be discharged from the vent hole 516, which is conducive to the manganese-iron alloy solution filling the casting cavity. The mold opening and closing cam guide 504 is horizontally fixed on the inner wall of the device shell 7. In this embodiment, the central shaft 2 is driven to rotate by the driving unit 4, and the tundish 1, the valve assembly 3 and the plurality of pellet casting molds 5 fixed on the central shaft 2 rotate synchronously. When the mold opening and closing roller 508 of the pellet casting mold 5 rotates into the mold closing position in the mold opening and closing cam guide rail 504, the concave mold plate 506 on the fixed mold shell 502 and the movable mold shell 503 are molded to form a pellet casting cavity. When the tundish 1 rotates, the manganese-iron alloy solution inside it is injected into the concave mold plate 506 along the nozzle sleeve 6 under the action of centrifugal force to close the mold to form the pellet casting cavity. At the same time, coolant flows in the cooling channel to exchange heat with the manganese-iron alloy solution in the pellet casting cavity. The manganese-iron alloy solution is cooled and solidified into solid particles. When the mold opening and closing roller 508 of the pellet casting mold 5 rotates into the mold opening and closing cam guide rail 504, the mold opening and closing roller 508 of the pellet casting mold 5 rotates into the mold opening and closing cam guide rail 504. When the mold opening position is reached, the mold opening and closing roller 508 drives the swing arm 507 to rotate, and the swing arm 507 drives the rotating shaft 505 and the movable mold shell 503 to rotate to open the mold, and the manganese-iron alloy particles in the concave mold plate 506 are thrown out under the action of centrifugal force, and then the movable mold shell 503 is re-molded to perform the next round of particle casting work, thereby realizing continuous particle casting. When the volume or shape of the manganese-iron alloy particles needs to be changed, it is only necessary to replace the concave mold plates 506 on the fixed mold shell 502 and the movable mold shell 503. Compared with the existing method of using traditional mold casting + mechanical crushing or manual crushing, the manganese-iron alloy particles obtained by continuous casting using the manganese-iron alloy continuous casting device of the present invention are basically not pulverized, have little pollution to the environment, have high particle uniformity, and are convenient to change the particle size of the manganese-iron alloy particles, with high production efficiency. ;

[0029] Example 2

[0030] See also Figure 3In order to enable the movable mold shell 503 and the fixed mold shell 502 to be automatically locked when the mold is closed and automatically unlocked when the mold is opened, this embodiment adds a locking shaft 509, a locking pin 510, a locking guide rail 511 and a locking roller 512 on the basis of Example 1, and the fixed mold shell 502 and the movable mold shell 503 are locked by inserting the locking pin 510 into the pin hole 515. In this embodiment, the pellet casting mold 5 also includes a locking shaft 509, a locking pin 510, a locking guide rail 511 and a locking roller 512. At least one notch 513 is provided on the fixed mold shell 502, and a protrusion 514 corresponding to the notch 513 is provided on the movable mold shell 503. A pin hole 515 is vertically provided on the protrusion 514. The locking shaft 509 vertically penetrates the interior of the fixed mold shell 502, and the locking roller 512 is provided at the top of the locking shaft 509 and is connected to the fixed mold shell 502. The locking guide rail 511 corresponds to the locking guide rail 511, which is fixed in the device housing 7. The locking pin 510 is fixed on the locking shaft 509 and corresponds to the pin hole 515. The locking shaft 509 can move up and down on the fixed mold shell 502 and then drive the locking pin 510 to rise and fall synchronously in the gap 513. Specifically, a tension spring is sleeved on the locking shaft 509 (as shown in the figure). When the mold is closed, the protrusion 514 extends into the gap 513, and the locking shaft 509 is pulled and moved under the action of the tension spring. The locking pin 510 is inserted into the pin hole 515 to lock the fixed mold shell 502 and the movable mold shell 503. When the mold is opened, the locking roller 512 rotates and rolls onto the locking guide rail 511, and the locking shaft 509 overcomes the tension spring to rise, driving the locking pin 510 to be pulled out from the pin hole 515, and the mold can be opened, thereby realizing automatic locking and unlocking of the pellet casting mold 5.

[0031] Example 3

[0032] See also Figure 5In order to automatically control the manganese-iron alloy solution in the nozzle sleeve 6 to enter the pellet casting mold 5 to cool the pellets, this embodiment is a preferred embodiment of the valve assembly 3. On the basis of embodiment 1, the valve assembly 3 of this embodiment is more suitable for completing the work of blocking or opening the nozzle sleeve 6 under high temperature environment; in this embodiment, the valve assembly 3 includes a valve body 301, a valve stem 302, a gate plate 303, a feed roller 304 and a feed guide rail 305. The valve body 301 is fixedly arranged on the outer wall of the tundish 1, the nozzle sleeve 6 is connected to the valve body 301, and the valve body 301 is vertically movable on the valve body 301, and one end of the valve stem 302 is connected to the gate plate 303, the other end of the valve stem 302 extends to the outside of the valve body 301 and is rotatably connected to the feed roller 304, a spring 306 is sleeved on the valve stem 302, the spring 306 pulls down the valve stem 302, so that the gate plate 303 moves down to block the water inlet sleeve 6, the feed roller 304 corresponds to the feed guide rail 305, the feed guide rail 305 is fixed in the device shell 7, the gate plate 303 is slidably arranged inside the valve body 301, and the gate plate 303 has a first state of blocking the water inlet sleeve 6 and a second state of opening the water inlet sleeve 6. In this embodiment, the valve stem 302 is pulled down by the spring 306, so that the gate plate 303 moves down to block the sprue sleeve 6, that is, the valve assembly 3 is a normally closed valve. When the pelletizing mold 5 completes mold closing and locking, the feed roller 304 rotates to enter the feed guide rail 305, the valve stem 302 is lifted, and the gate plate 303 is lifted synchronously to the second state of opening the sprue sleeve 6. During the continuous rotation, the manganese-iron alloy solution in the sprue sleeve 6 is thrown out from the outlet end into the pelletizing mold 5 under the action of centrifugal force. When the feed roller 304 leaves the feed guide rail 305, the spring 306 pulls down the valve stem 302, and the gate plate 303 is in the first state of blocking the sprue sleeve 6. The amount of manganese-iron alloy solution entering the pelletizing mold 5 for pelletizing can be adjusted by adjusting the rotation speed of the central shaft 2 or the formation of the feed guide rail 305.

[0033] Example 4

[0034] See also Figure 2 and Figure 3In order to prevent the solidified ferromanganese alloy particles from sticking to the concave mold plate 506 after the pellet casting mold 5 is opened, the present embodiment adds an air supply ring 205, an air blowing pipe 206 and an air blowing nozzle 207 on the basis of the embodiment 1, and blows off the ferromanganese alloy particles by introducing compressed air; in the present embodiment, an air supply ring 205 is sleeved on the central axis 2, and the air supply ring 205 is connected to the air blowing pipe 206, and the air outlet end of the air blowing pipe 206 is provided with an air blowing nozzle 207, and the jet direction of the air blowing nozzle 207 corresponds to the concave mold plate 506 inside the fixed mold shell 502 and the movable mold shell 503 after the molds are opened, and the corresponding interface on the rotary joint 202 is connected to the air supply ring 205. The external compressed air enters along the rotary joint 202, the air supply ring 205, and the blowing pipe 206, and is ejected from the blowing nozzle 207 to the concave mold plate 506 inside the fixed mold shell 502 and the movable mold shell 503 after the mold is opened, blowing off the ferromanganese alloy particles stuck thereon. At the same time, the compressed air can further cool the ferromanganese alloy particles.

[0035] Example 5

[0036] See also Figure 1 and Figure 5 In order to prevent the ferromanganese alloy solution in the nozzle sleeve 6 from solidifying and causing blockage, the present embodiment adds an induction coil 601 on the basis of the above-mentioned embodiments 1 to 4, and the ferromanganese alloy solution in the nozzle sleeve 6 is heated in real time by the induction coil 601 to prevent its temperature from decreasing; in the present embodiment, an induction coil 601 is sleeved on the nozzle sleeve 6, and the induction coil 601 is electrically connected to the corresponding interface on the rotary joint 202, and the external high-frequency power supply is electrically connected to the induction coil 601 through the rotary joint 202 to realize heating on the nozzle sleeve 6, and the rotary joint 202 adopts the existing gas-liquid-electric integrated rotary joint to ensure that the external coolant, compressed air and high-frequency power supply can be conducted to the corresponding parts.

[0037] Example 6

[0038] See also Figure 1 , Figure 2 and Figure 7In order to further increase the cooling effect of the ferromanganese alloy particles, this embodiment adds a heat dissipation fan 8 on the basis of the above embodiment to cool the ferromanganese alloy particles after they are thrown out; in this embodiment, a third gear 208 is sleeved on the shaft body located outside the device housing 7 on the central axis 2, and a heat dissipation fan 8 is provided on the bottom surface of the device housing 7. The heat dissipation fan 8 includes a fan housing 801, a fan shaft 802 and fan blades 803. The fan housing 801 is fixedly arranged on the bottom surface of the device housing 7, and the air inlet end is located outside the device housing 7, and the air blowing end is located at the device housing 7. The device shell 7 is provided with a discharge guide plate 701 which is inclined toward the outer wall. The discharge guide plate 701 is generally in an L-shaped structure which is inclined toward the outer side of the device shell 7. A discharge port 702 is provided on the side wall of the device shell 7 corresponding to the discharge guide plate 701, and a plurality of ventilation holes 703 are provided on the discharge guide plate 701. When the driving unit 4 drives the central axis 2 to rotate, it can synchronously drive the fan blades 803 to rotate. The fan blades 803 blow the cold air outside the device shell 7 upwards. The cold air passes through the ventilation holes 703 and exchanges heat with the ejected ferromanganese alloy particles for cooling, further increasing the cooling effect of the ferromanganese alloy particles, and preventing the ferromanganese alloy particles from being ejected and sticking to the discharge guide plate 701 due to insufficient cooling. In addition, the operation of the cooling fan 8 borrows the power of the driving unit 4, and there is no need to introduce new power equipment, which effectively saves costs.

[0039] Example 7

[0040] See also Figure 6 and Figure 7 In order to prevent the smoke generated during the pelletizing operation from polluting the on-site working environment, the present embodiment adds a smoke collecting hood 9 on the basis of the above embodiment. In the present embodiment, the device shell 7 and the top of the tundish 1 are both set as open structures, and the upper cover is provided with a smoke collecting hood 9, and the smoke collecting hood 9 is connected with a smoke duct 10, and the smoke duct 10 is connected with an external smoke purification treatment equipment to purify the generated smoke before discharging it. A long water nozzle 11 is vertically provided on the device smoke collecting hood 9, and the bottom end of the long water nozzle 11 extends to the interior of the tundish 1, and the top end of the long water nozzle 11 is connected with the external ladle.

[0041] Example 8

[0042] See also Figures 1 to 7 The ferromanganese alloy continuous casting method disclosed in this embodiment uses the ferromanganese alloy continuous casting device in the above embodiment to cast particles, including the following steps:

[0043] S1. Start the driving unit 4 to drive the central shaft 2 to rotate, and the tundish 1 and several pellet casting molds 5 connected to the central shaft 2 rotate synchronously; S2. The external coolant flows through the rotary joint 202 and the liquid supply ring 203, and then enters the cooling channels in the concave mold plate 506 inside the fixed mold shell 502 and the movable mold shell 503 through the coolant inlet pipe 517 for heat exchange. After heat exchange, it flows back to the collecting ring 204 through the return pipe 518 and flows out from the rotary joint 202 for recovery. At the same time, the induction coil 601 is energized to heat the manganese-iron alloy solution in the nozzle sleeve 6 to prevent the manganese-iron alloy solution from solidifying and clogging. ; S3, the ferromanganese alloy solution enters the tundish 1 through the long water nozzle 11, and the ferromanganese alloy solution is thrown into the water inlet sleeve 6 under the action of centrifugal force. When the opening and closing mold roller 508 of the pellet casting mold 5 rotates to enter the mold closing position in the opening and closing mold cam guide rail 504, the locking pin 510 is inserted into the pin hole 515 to lock the fixed mold shell 502 and the movable mold shell 503, and the internal concave mold plate 506 encloses the cavity of the ferromanganese alloy casting particles. The feed roller 304 of the valve assembly 3 rotates to the feed guide rail 305 at the same time, and the gate 303 is pulled up by the valve stem 302 to open the water inlet sleeve 6, and the ferromanganese alloy solution in the water inlet sleeve 6 The molten iron solution is injected into the mold cavity formed by the two concave mold plates 506 and is cooled by heat exchange with the coolant flowing through the cooling channel. When the feed roller 304 rotates out of the feed guide rail 305, the valve stem 302 drives the gate plate 303 to block the water inlet sleeve 6 under the restoring force of the spring 306. The manganese-iron alloy solution continues to rotate with the pellet casting mold 5 and cools and solidifies into solid particles. When the opening and closing mold roller 508 of the pellet casting mold 5 rotates into the mold opening position in the opening and closing mold cam guide rail 504, the locking roller 512 of the locking mechanism also rotates synchronously into the locking guide rail 511, and the locking shaft 509 drives the locking pin 510 from the pin hole 515. Pull out and unlock, the mold opening and closing roller 508 drives the swing arm 507 to rotate, and the swing arm 507 drives the rotating shaft 505 and the movable mold shell 503 to rotate to open the mold. After the mold is opened, the solidified ferromanganese alloy particles are thrown out and fall onto the discharge guide plate 701 under the action of centrifugal force. At the same time, the blowing nozzle 207 blows out compressed air to blow out the ferromanganese alloy particles to prevent them from remaining and sticking to the concave mold plate 506, while further cooling the ferromanganese alloy particles. The pellet casting mold 5 continues to rotate and repeat the pellet casting work, and the ferromanganese alloy particles are led out from the discharge port 702 along the discharge guide plate 701 to the outside of the device shell 7, so as to realize the continuous pellet casting of ferromanganese alloy;

[0044] S4. In the process of the ferromanganese alloy particles being thrown out and falling onto the discharge guide plate 701, the cooling fan 8 on the bottom surface of the device shell 7 blows the external cold air upward into the interior of the device shell 7 to cool the thrown ferromanganese alloy particles, thereby further improving the cooling effect. S5. The smoke generated during the pelletizing process is discharged from the top of the device shell 7 and collected by the smoke hood 9, and is led to the external smoke purification treatment equipment through the smoke duct 10 for treatment.

[0045] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A ferromanganese alloy continuous casting device, characterized in that: The invention comprises a tundish, a central shaft, a valve assembly, a driving unit and a plurality of pellet casting molds, wherein the output end of the driving unit is connected to the central shaft, the tundish is fixedly arranged at the top end of the central shaft, a plurality of nozzle sleeves connected to the interior of the tundish are evenly distributed on the side wall of the tundish in the circumferential direction, the valve assembly is arranged on the nozzle sleeve, a plurality of pellet casting molds are evenly distributed on the outer wall of the central shaft, the outlet end of the nozzle sleeve is connected to the inner cavity of the pellet casting mold, the pellet casting mold comprises a mold frame, a fixed mold shell, a movable mold shell and a mold opening and closing cam guide rail, the mold frame is fixedly arranged on the central shaft, the fixed mold shell is fixed on the mold frame, the movable mold shell is rotatably arranged on the mold frame through a rotating shaft, both the fixed mold shell and the movable mold shell are detachably provided with a concave mold plate, a cooling channel is arranged inside the concave mold plate, the rotating shaft extends downward through the mold frame, a swing arm is fixed to the bottom end of the rotating shaft, and a free end of the swing arm is provided with a mold opening and closing roller corresponding to the mold opening and closing cam guide rail.

2. The ferromanganese alloy continuous casting device according to claim 1, characterized in that: The pellet casting mold also includes a locking shaft, a locking pin, a locking guide rail and a locking roller. The fixed mold shell is provided with at least one notch, the movable mold shell is provided with a protrusion corresponding to the notch, and the protrusion is provided with a pin hole. The locking shaft is arranged through the fixed mold shell, the locking roller is arranged at the top of the locking shaft and corresponds to the locking guide rail, the locking pin is fixedly arranged on the locking shaft and corresponds to the pin hole, the locking shaft can be lifted and lowered on the fixed mold shell and thus drive the locking pin to rise and fall synchronously in the notch. After the mold is closed, the protrusion extends into the notch, and the locking pin is inserted into the pin hole to lock the fixed mold shell and the movable mold shell.

3. The ferromanganese alloy continuous casting device according to claim 1, characterized in that: The valve assembly includes a valve body, a valve stem, a gate, a feed roller and a feed guide rail. The valve body is fixedly arranged on the outer side wall of the tundish, the water inlet sleeve is communicated with the valve body, one end of the valve stem is connected with the gate, and the other end of the valve stem extends to the outside of the valve body and is connected with the feed roller. A spring is sleeved on the valve stem, the feed roller corresponds to the feed guide rail, the gate is slidably arranged inside the valve body, and the gate has a first state of blocking the water inlet sleeve and a second state of opening the water inlet sleeve.

4. The ferromanganese alloy continuous casting device according to claim 3, characterized in that: The fixed mold shell and / or the movable mold shell is provided with an exhaust hole connected to the concave mold plate.

5. The ferromanganese alloy continuous casting device according to any one of claims 1 to 4, characterized in that: The central shaft is rotatably arranged on the central axis in the device shell, and the bottom end extends to the outside of the device shell, the central shaft is located outside the device shell and is sleeved with a first gear, the output shaft of the driving unit is provided with a second gear, the first gear and the second gear are meshingly connected, a swivel joint is provided at the bottom end of the central shaft, a liquid supply ring and a liquid collecting ring are respectively sleeved on the central shaft, the fixed mold shell and the movable mold shell are respectively provided with a coolant inlet pipe and a return pipe connected to the cooling channel, the coolant inlet pipe is connected to the liquid supply ring, the return pipe is connected to the liquid collecting ring, and the corresponding interfaces on the swivel joint are respectively connected to the liquid supply ring and the liquid collecting ring.

6. The ferromanganese alloy continuous casting device according to claim 5, characterized in that: An air supply ring is sleeved on the central axis, and an air blowing pipe is connected to the air supply ring. An air blowing nozzle is provided at the air outlet end of the air blowing pipe. The jet direction of the air blowing nozzle corresponds to the concave mold plate inside the fixed mold shell and the movable mold shell after the molds are opened. The corresponding interface on the rotary joint is connected to the air supply ring.

7. The ferromanganese alloy continuous casting device according to claim 6, characterized in that: An induction coil is sleeved on the nozzle sleeve, and the induction coil is electrically connected to a corresponding interface on the rotary joint.

8. The ferromanganese alloy continuous casting device according to claim 7, characterized in that: The central axis is located outside the device shell and is sleeved with a third gear. A cooling fan is provided on the bottom surface of the device shell. The cooling fan includes a fan case, a fan shaft and fan blades. The fan case is fixedly arranged on the bottom surface of the device shell, and the air inlet end is located outside the device shell, and the air blowing end is located inside the device shell. The fan shaft is rotatably arranged in the fan case, and the fan blades are sleeved on the fan shaft. A fourth gear is provided at the bottom of the fan shaft, and the third gear is meshingly connected with the fourth gear. A discharge guide plate is provided in the device shell, and a discharge port is provided on the side wall of the device shell corresponding to the discharge guide plate, and a plurality of ventilation holes are provided on the discharge guide plate.

9. The ferromanganese alloy continuous casting device according to claim 8, characterized in that: The device shell and the top of the tundish are both set as open structures, and a smoke collecting hood is provided on the upper cover, a smoke duct is connected to the smoke collecting hood, a long water outlet is vertically provided on the smoke collecting hood, the bottom end of the long water outlet extends to the interior of the tundish, and the top end of the long water outlet is connected to the external ladle.

10. A method for continuous casting of ferromanganese alloy, characterized in that: The granulation is performed using the ferromanganese alloy continuous casting device according to any one of claims 1 to 9, comprising the following steps: S1, start the driving unit to drive the central shaft to rotate, and the tundish and several pelletizing molds connected to the central shaft rotate synchronously; S2, the external coolant flows through the rotary joint and the liquid supply ring and enters the cooling channels in the concave mold plates inside the fixed mold shell and the movable mold shell through the coolant inlet pipe for heat exchange. After heat exchange, it flows back to the liquid collecting ring through the return pipe and flows out of the rotary joint for recovery; S3. The ferromanganese alloy solution enters the tundish through the long nozzle. The ferromanganese alloy solution is thrown into the inlet sleeve under the action of centrifugal force. When the opening and closing mold rollers of the pellet casting mold rotate into the mold closing position in the opening and closing mold cam guide rail, the locking pin is inserted into the pin hole to lock the fixed mold shell and the movable mold shell. The internal concave mold plate is enclosed to form a cavity for the ferromanganese alloy casting particles. The feed roller of the valve assembly rotates to the feed guide rail at the same time, and the gate is pulled up by the valve stem to open the nozzle sleeve. The ferromanganese alloy solution in the nozzle sleeve is poured into the cavity formed by the two concave mold plates and is cooled by heat exchange with the coolant flowing through the cooling channel. When the feed roller rotates out of the feed guide rail, the valve stem is driven by the restoring force of the spring. The gate seals the water inlet casing, and the ferromanganese alloy solution continues to rotate with the pellet casting mold and cools and solidifies into solid particles; when the opening and closing mold rollers of the pellet casting mold rotate into the mold opening position in the opening and closing mold cam guide rail, the locking rollers of the locking mechanism also rotate synchronously into the locking guide rail, the locking shaft drives the locking pin to be pulled out of the pin hole to unlock, the opening and closing mold rollers drive the swing arm to rotate, and the swing arm drives the rotating shaft and the movable mold shell to rotate to open the mold, and the solidified ferromanganese alloy particles after the mold opening are thrown out and fall onto the discharge guide plate under the action of centrifugal force, the pellet casting mold continues to rotate and repeats the pellet casting work, and the ferromanganese alloy particles are led out from the discharge port to the outside of the device shell along the discharge guide plate, so as to realize the continuous pellet casting of ferromanganese alloy; S4. During the process of the ferromanganese alloy particles being thrown out, the cooling fan on the bottom surface of the device housing blows the external cold air upward into the interior of the device housing to further cool the thrown ferromanganese alloy particles; S5. The smoke generated during the pelletizing process is discharged from the top of the device shell and collected by the smoke hood, and then led to the external smoke purification treatment equipment through the smoke duct for treatment.

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