A charging crane for magnesium smelting

Abstract

The application discloses a feeding trolley for magnesium smelting, which comprises a lifting trolley, wherein a material bin is arranged on the lifting trolley, a plurality of discharge ports are uniformly arranged at the bottom of the material bin, a spiral discharging mechanism is arranged in the material bin, a discharging mechanism is arranged at the bottom of the discharge port, the discharging mechanism comprises a discharging tank, a discharging port is arranged at the bottom of the discharging tank, and a gravity valve is arranged at the discharging port; a driving plate is fixedly connected to the outside of the discharging tank, a movable pulley is arranged on the driving plate, a motorized hoist matched with the movable pulley is arranged on the lifting trolley, and the movable pulley and the motorized hoist are connected through a steel wire rope; the spiral discharging mode is adopted, the impact of magnesium balls on entering the material bin is greatly reduced, the problem that the magnesium balls are broken due to high feeding is solved, the feeding into the discharging mechanism is realized by controlling the opening and closing time of the discharging valve, the discharging mechanism is connected with a vacuum furnace, and thus the automatic feeding operation is realized, and the production efficiency and safety of the magnesium smelting process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal smelting equipment, in particular to a feeding trolley for magnesium smelting. BACKGROUND

[0002] The smelting method is one of the magnesium smelting methods, which first processes the magnesium ore into magnesium balls through crushing and grinding processes, and then smelts the magnesium balls in a vacuum furnace. The smelting method can efficiently extract magnesium metal and is a commonly used industrial production method. However, in the current magnesium smelting process, the strength of the raw material magnesium ball is not very high, and it is easy to break when falling from a high place, which affects the smelting of magnesium. Therefore, it is not possible to use a large bin to store and feed magnesium balls, and manual feeding is used, which is low in efficiency. The related operations of the vacuum furnace are also performed manually, such as the opening and closing of the air inlet pipeline and the opening and closing of the vacuum furnace. The temperature of the vacuum furnace is very high, which increases the risk of manual operation. Therefore, the equipment for smelting magnesium by the smelting method needs to be optimized. SUMMARY

[0003] The purpose of the present application is to provide a feeding trolley for magnesium smelting, which uses a spiral feeding method to greatly reduce the impact on the magnesium balls when they enter the bin, solves the problem of magnesium ball breakage caused by feeding from a high place, and enables the bin to store a large number of magnesium balls. By feeding the magnesium balls into the feeding mechanism through the feedback of the parameters in the vacuum furnace and controlling the opening and closing timing of the feeding valve, the magnesium balls are fed into the feeding mechanism, and then the feeding mechanism is connected with the vacuum furnace to realize automatic feeding and improve the production efficiency and safety of the magnesium smelting process.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a feeding trolley for magnesium smelting, comprising a trolley, a bin is arranged on the trolley, a feeding hopper is arranged on the top of the bin, a plurality of discharge openings are uniformly arranged at the bottom of the bin, a discharge valve is installed at the discharge opening, and a spiral feeding mechanism is arranged in the bin; the spiral feeding mechanism comprises a vertical support rod, a spiral feeding plate is fixedly connected to the support rod, a baffle is arranged at the edge of the spiral feeding plate, a gap is arranged between the baffle and the spiral feeding plate above it, and the size of the gap is greater than the diameter of the magnesium ball; a discharging mechanism is arranged at the bottom of the discharge opening, the discharging mechanism comprises a discharging tank, a dust cover is arranged on the top of the discharging tank, the dust cover is sleeved outside the discharge opening, a discharging opening with a taper structure is arranged at the bottom of the discharging tank, a gravity valve is installed at the discharging opening, the gravity valve comprises a valve block matched with the discharging opening, the valve block is located inside the discharging tank, an extension rod is vertically arranged at the bottom of the valve block, the bottom of the extension rod penetrates through the discharging opening and is fixedly connected with a pressing plate; a driving plate is fixedly connected to the outside of the discharging tank, a movable pulley is installed on the driving plate, an electric hoist matched with the movable pulley is installed on the trolley, and the movable pulley and the electric hoist are connected through a steel wire rope.

[0005] Optionally, a buffer mechanism is provided between the discharge port and the feeding mechanism. The buffer mechanism includes a buffer tank. A feed inlet is provided on the upper side of the buffer tank and is connected to the discharge port. A discharge port is provided at the bottom of the buffer tank and a discharge valve is installed at the discharge port. A dust cover is fitted over the outside of the discharge port and a fixing plate is provided on the top of the dust cover. The fixing plate is fixedly connected to the outside of the buffer tank.

[0006] Optionally, a maintenance pipe is inclinedly provided on the upper side of the buffer tank, and the feed inlet is vertically connected to the side of the maintenance pipe.

[0007] Optionally, the crane trolley is also equipped with a magnesium dust collection device, which is a bag filter. Dust collection pipes are vertically installed on both sides of the discharge tank. The bottom of the dust collection pipes is located on both sides of the discharge port and is connected to the bottom of the discharge tank. The top of the dust collection pipes is connected to the top of the discharge tank. The top of all discharge tanks is connected to a common dust collection main pipe, which is connected to the inlet of the bag filter.

[0008] Optionally, the discharge valve includes a vertically arranged valve stem located inside the buffer tank. A valve plate matching the discharge port is fixedly connected to the bottom of the valve stem. A telescopic cylinder is installed on the top of the buffer tank, and the piston end of the telescopic cylinder is fixedly connected to the valve stem.

[0009] Optionally, a telescopic tube is installed on the portion of the buffer tank located inside the discharge tank, and the bottom of the telescopic tube is fixedly connected to the inner wall of the discharge tank.

[0010] Optionally, a magnesium dust collection pipe is installed on the top of the silo, and the magnesium dust collection pipe is also connected to the inlet of the bag filter.

[0011] Optionally, several spiral feeding plates are evenly arranged on the support rod.

[0012] Optionally, an electronic crane scale is installed on the wire rope.

[0013] The charging crane for magnesium smelting of the present invention has the following advantages:

[0014] (1) Based on the physical properties of magnesium balls, a spiral feeding method is adopted to reduce the impact force on the magnesium balls when they fall into the hopper and ensure the integrity of the magnesium balls. The opening and closing timing of the feeding valve is controlled by the parameter feedback of the vacuum furnace to add material to the feeding mechanism. Then, the feeding mechanism is connected to the vacuum furnace to put the magnesium balls in the feeding mechanism into the vacuum furnace, thereby realizing automatic feeding operation, reducing the work intensity and danger of workers, and improving the production efficiency and safety of magnesium smelting process.

[0015] (2) The buffer mechanism can play a transitional role, and the magnesium balls in the silo are first stored in the buffer tank. When the magnesium balls need to be added to the vacuum furnace, the magnesium balls are then dropped from the buffer tank into the discharging tank, so that the addition amount of the magnesium balls can be more accurately controlled, and the magnesium ball breakage can be further avoided.

[0016] (3) The magnesium dust collecting device can collect the magnesium dust generated when the magnesium balls fall into the vacuum furnace. After being filtered by the bag-type dust collector, the magnesium dust is discharged from the outlet of the bag-type dust collector and recycled, so that the resource waste is avoided.

[0017] (4) The electronic hanging scale can measure the weight of the magnesium balls in each discharging tank, so that the precise feeding of different vacuum furnaces can be realized, and the magnesium smelting quality can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of a magnesium smelting vacuum furnace.

[0019] Figure 2 is a front view of the present application.

[0020] Figure 3 is a side view of the present application.

[0021] Figure 4 is a schematic diagram of a spiral discharging mechanism.

[0022] Figure 5 is a structural schematic diagram of a buffer mechanism.

[0023] Figure 6 is a structural schematic diagram of a discharging mechanism.

[0024] Figure 7 is a connection schematic diagram of the buffer mechanism and the discharging mechanism. DETAILED DESCRIPTION

[0025] The present application will be further described below in combination with the drawings, Figure 1 is a structural diagram of the current magnesium smelting vacuum furnace, including a top-open furnace body 1, a furnace body cover plate 2 arranged at the top of the furnace body 1, a ventilation pipeline 3 arranged at the bottom center of the furnace body 1, and a ventilation cover plate 4 arranged at the top of the ventilation pipeline 3. When the magnesium balls need to be added to the vacuum furnace, the furnace body cover plate 2 is opened, the ventilation cover plate 4 is closed, and then the magnesium balls are added to the vacuum furnace. When smelting, the ventilation cover plate 4 is opened, the furnace body cover plate 2 is closed, and the magnesium balls are heated. The whole process is manually completed, which has high labor intensity and high operation risk.

[0026] As Figures 2-7As shown, the charging trolley of the present application is used in cooperation with a magnesium smelting vacuum furnace, and the charging trolley comprises a trolley 5, a material bin 6 and a magnesium dust collecting device 7 are arranged on the trolley 5. The top of the material bin 6 is provided with a feeding hopper 8, and the bottom of the material bin 6 is uniformly provided with three discharge ports 9, and a discharge valve is installed at the discharge port 9 to control the discharge of the material bin 6. The inside of the material bin 6 is provided with a spiral discharging mechanism. The spiral discharging mechanism comprises a vertically arranged supporting rod 10, three spiral discharging plates 11 are fixedly connected to the supporting rod 10, the three spiral discharging plates 11 are uniformly arranged in a staggered manner, the edges of the spiral discharging plates 11 are provided with baffles 12, and a gap is arranged between the baffle 12 and the spiral discharging plate 11 above it. The size of the gap is greater than the diameter of the magnesium ball. The strength of the magnesium ball is not high, and the free-falling mode is adopted for discharging. When the height is too high, the magnesium ball will be broken, and the spiral discharging mode changes the straight falling trajectory into a spiral falling, increases the movement path, and also has friction, rotation and other factors to consume the gravitational potential energy of the magnesium ball. Therefore, the impact force received by the magnesium ball falling into the material bin 6 from a high place is small, and it is not easy to break, which ensures the integrity of the magnesium ball and provides sufficient storage space for the magnesium ball, which is beneficial to the subsequent smelting process.

[0027] The bottom of the discharge port 9 is provided with a buffer mechanism 13, the bottom of the buffer mechanism 13 is provided with a discharging mechanism 14, and the arrow direction in the drawing is the moving path of the magnesium ball. The buffer mechanism 13 comprises a buffer tank 15, the side of the upper part of the buffer tank 15 is inclinedly provided with a maintenance pipeline 16, a feeding port 17 is vertically arranged on the maintenance pipeline 16, the feeding port 17 is connected with the discharge port 9, a discharging port 18 is arranged at the bottom of the buffer tank 15, and a discharging valve is arranged at the discharging port 18. The discharging valve comprises a vertically arranged valve rod 19, the valve rod 19 is located in the buffer tank 15, a valve plate 20 matched with the discharging port 18 is fixedly connected to the bottom of the valve rod 19, a telescopic cylinder 21 is arranged at the top of the buffer tank 15, and the piston end of the telescopic cylinder 21 is fixedly connected with the valve rod 19. The end of the maintenance pipeline 16 is closed in the normal state, and is opened only during maintenance. During equipment operation, the feeding port 17 is open, magnesium balls are added into the buffer tank 15 by controlling the opening and closing of the discharge valve, and the magnesium balls fall into the buffer tank 15 through the slope of the maintenance pipeline 16. The inclined maintenance pipeline 16 can also reduce the impact of the magnesium ball when falling, further avoiding the damage of the magnesium ball. When the telescopic cylinder 21 drives the valve plate 20 to descend, the discharging port 18 is opened, and the magnesium balls in the buffer tank 15 fall into the discharging tank 22. When the telescopic cylinder 21 drives the valve plate 20 to ascend, the discharging port 18 is closed, and the buffer tank 15 stops adding magnesium balls into the discharging tank 22. Compared with directly discharging from the material bin 6, the buffer tank 15 can provide a suitable transfer space to avoid the case of excessive one-time discharging.

[0028] The discharging mechanism 14 comprises a discharging tank 22, the top of the discharging tank 22 is provided with a corrugated dust cover 23, the dust cover 23 is sleeved outside the discharge port 18, the top of the dust cover 23 is provided with a fixed plate 24, the fixed plate 24 is fixedly connected outside the buffer tank 15, the dust cover 23 can ensure the airtightness of the connection between the discharging tank 22 and the buffer tank 15, and also provides compensation in the vertical direction, by the compensation effect of the dust cover 23, the discharging tank 22 can move relative to the buffer tank 15 in the vertical direction. The part of the buffer tank 15 located in the discharging tank 22 is provided with an extension pipe 25, the bottom of the extension pipe 25 is fixedly connected to the inner wall of the discharging tank 22, the extension pipe 25 can compensate the length of the buffer tank 15 when the discharging tank 22 moves, when the discharging tank 22 descends, the extension pipe 25 is pulled open, the distance between the discharge port 18 and the discharging tank 22 is kept stable, avoiding the discharging tank 22 descending too much, causing the distance between the discharge port 18 and the discharging tank 22 to be too large, and the magnesium balls falling to break. The bottom of the discharging tank 22 is provided with a tapered discharging port 26, the discharging port 26 is provided with a gravity valve, the gravity valve comprises a valve block 27 matched with the discharging port 26, the valve block 27 is located inside the discharging tank 22, the bottom of the valve block 27 is vertically provided with an extension rod 28, the bottom of the extension rod 28 penetrates through the discharging port 26 and is fixedly connected with a pressing plate 29, the pressing plate 29 is used to cooperate with the ventilation pipeline 3 in the vacuum furnace. The outer sides of the three discharging tanks 22 are fixedly connected with a driving plate 30, the driving plate 30 is provided with a movable pulley 31, the hoist trolley 5 is provided with an electric hoist 32 matched with the movable pulley 31, the movable pulley 31 and the electric hoist 32 are connected through a steel wire rope 33, the steel wire rope 33 is provided with an electronic hoist scale, the electric hoist 32 can drive the driving plate 30 to ascend or descend, thereby realizing the movement of the discharging tank 22 in the vertical direction. Under normal circumstances, the gravity valve naturally droops under the action of gravity, the valve block 27 is attached to the inner wall of the discharging port 26, and the discharging port 26 is closed; when it is necessary to add magnesium balls into the vacuum furnace, the hoist trolley 5 is moved above the vacuum furnace, the pressing plate 29 is located directly above the ventilation pipeline 3, then the electric hoist 32 drives the discharging tank 22 to descend, the pressing plate 29 also descends, when the pressing plate 29 covers the top of the ventilation pipeline 3, the electric hoist 32 drives the discharging tank 22 to continue to descend, at this time, the ventilation pipeline 3 will lift the gravity valve upward, the discharging port 26 is opened, the magnesium balls in the discharging tank 22 will be added into the vacuum furnace, the automatic feeding of the magnesium balls is completed, the electronic hoist scale can weigh the overall weight of the driving plate 30, that is, the weight of the discharging tank 22, when the buffer tank 15 adds magnesium balls into the discharging tank 22, the increased weight of the driving plate 30 is the weight of the magnesium balls in the corresponding discharging tank 22, so as to realize quantitative feeding.

[0029] The trolley 5 is also provided with a magnesium dust collecting device 7, which is a bag-type dust collector 34. Two dust collecting pipes 35 are vertically arranged on both sides of the discharge tank 22, the bottom of the dust collecting pipe 35 is located on both sides of the discharge port 26 and communicates with the bottom of the discharge tank 22, the top of the dust collecting pipe 35 communicates with the top of the discharge tank 22, and the top of all the discharge tanks 22 is connected with a dust collecting main pipe 36 which communicates with the inlet of the bag-type dust collector 34. The top of the bin 6 is provided with a bin magnesium dust collecting pipe 37 which is also connected to the inlet of the bag-type dust collector 34. When the magnesium balls collide during falling, magnesium dust is generated. In the existing smelting process, the magnesium dust directly escapes into the environment, which causes waste of resources and pollution of the production environment, affecting the health of workers. The magnesium dust generated in the bin 6 and the buffer tank enters the bag-type dust collector 34 through the bin magnesium dust collecting pipe 37, and the magnesium dust generated in the discharge tank 22 and the vacuum furnace enters the bag-type dust collector 34 through the dust collecting main pipe 36. The filtered air is discharged from the outlet of the bag-type dust collector 34, and the filtered magnesium dust accumulates at the bottom of the bag-type dust collector 34, and is finally uniformly discharged and collected, saving resources and maintaining a good production environment.

[0030] When feeding the bin 6, the magnesium balls are poured from the feed hopper 8 and roll down along the spiral feeding plate 11. The baffle 12 can ensure that the magnesium balls always fall into the bin 6 at the bottom. The three spiral feeding plates 11 are arranged at an angle of 120° to ensure that the magnesium balls are evenly distributed in the bin 6. As the height of the material in the bin 6 increases, the magnesium balls will overflow from the gap between the baffle 12 and the spiral feeding plate 11 into the bin 6 until the bin 6 is filled. The magnesium balls in the bin 6 can be stored in the buffer tank 15 in small quantities to facilitate the control of the amount of feeding. The smelting conditions in each vacuum furnace are different. According to the parameter feedback of each vacuum furnace, the amount of feeding for each vacuum furnace can be determined, and then by controlling the opening and closing of the discharge valve and cooperating with the electronic hoist scale, the magnesium balls can be accurately added to each discharge tank 22. Finally, the crown block is moved to align the discharge tank 22 with the vacuum furnace that needs to be fed. Under the drive of the electric hoist 32, the discharge tank 22 gradually descends. When the pressure plate 29 of the gravity valve covers the opening of the ventilation pipe 3, the discharge tank 22 continues to descend and starts to feed the magnesium balls into the vacuum furnace. When the magnesium balls in the discharge tank 22 are all added to the vacuum furnace, the feeding operation is completed. At the same time, the magnesium dust generated during the feeding process is also collected, which does not cause waste of resources and pollution of the production environment. The entire feeding process can be automatically completed, reducing the labor intensity of workers and improving the safety of production. Moreover, multiple discharge tanks 22 can simultaneously perform precise and quantitative feeding operations on multiple vacuum furnaces, which significantly improves the production precision and efficiency.

[0031] The above described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

Claims

1. A charging trolley for magnesium smelting comprising a trolley, characterised in that: The trolley is provided with a hopper, the top of the hopper is provided with a feeding hopper, the bottom of the hopper is uniformly provided with a plurality of discharge ports, the discharge ports are provided with discharge valves, and the inside of the hopper is provided with a spiral discharging mechanism; the spiral discharging mechanism comprises a vertically arranged supporting rod, the supporting rod is fixedly connected with a spiral discharging plate, the edge of the spiral discharging plate is provided with a baffle, a gap is arranged between the baffle and the spiral discharging plate above the baffle, and the size of the gap is greater than the diameter of the magnesium balls; the bottom of the discharge port is provided with a discharging mechanism, the discharging mechanism comprises a discharging tank, the top of the discharging tank is provided with a corrugated dust cover, the dust cover is sleeved outside the discharge port, the bottom of the discharging tank is provided with a discharging port of a taper structure, the discharging port is provided with a gravity valve, the gravity valve comprises a valve block matched with the discharging port, the valve block is located inside the discharging tank, the bottom of the valve block is vertically provided with an extension rod, the bottom of the extension rod penetrates through the discharging port and is fixedly connected with a pressing plate; a buffer mechanism is arranged between the discharge port and the discharging mechanism, the buffer mechanism comprises a buffer tank, the side of the upper part of the buffer tank is provided with a feeding port, the feeding port is connected with the discharge port, the bottom of the buffer tank is provided with a discharging port, the discharging port is provided with a discharging valve, the dust cover is sleeved outside the discharging port, the top of the dust cover is provided with a fixed plate, and the fixed plate is fixedly connected to the outside of the buffer tank; the outside of the discharging tank is fixedly connected with a driving plate, the driving plate is provided with a movable pulley, the trolley is provided with an electric hoist matched with the movable pulley, and the movable pulley and the electric hoist are connected through a steel wire rope.

2. A charging bridge for magnesium smelting as claimed in claim 1, characterised in that: The side of the upper part of the buffer tank is obliquely provided with a maintenance pipeline, and the feeding port is vertically and upwardly connected to the side of the maintenance pipeline.

3. A charging skip for the smelting of magnesium as claimed in claim 1 characterised in that: The trolley is also provided with a magnesium dust collecting device, the magnesium dust collecting device adopts a bag type dust collector; both sides of the discharging tank are vertically provided with dust collecting pipelines, the bottom of the dust collecting pipelines is located on both sides of the discharging port and is communicated with the bottom of the discharging tank, the top of the dust collecting pipelines is communicated with the top of the discharging tank, the top of all the discharging tanks is jointly connected with a dust collecting main pipe, and the dust collecting main pipe is communicated with the inlet of the bag type dust collector.

4. A charging skip for the smelting of magnesium as claimed in claim 1 characterised in that: The discharge valve comprises a vertically arranged valve rod, the valve rod is located inside the buffer tank, the bottom of the valve rod is fixedly connected with a valve plate matched with the discharging port, the top of the buffer tank is provided with a telescopic cylinder, and the piston end of the telescopic cylinder is fixedly connected with the valve rod.

5. A charging skip for the smelting of magnesium as claimed in claim 1 characterised in that: The part of the buffer tank located in the discharging tank is provided with a telescopic pipe, and the bottom of the telescopic pipe is fixedly connected to the inner wall of the discharging tank.

6. A charging skip for the smelting of magnesium as claimed in claim 3 characterised in that: The top of the hopper is provided with a hopper magnesium dust collecting pipeline, and the hopper magnesium dust collecting pipeline is also connected to the inlet of the bag type dust collector.

7. A charging skip for the smelting of magnesium as claimed in claim 1 characterised in that: The supporting rod is uniformly provided with a plurality of spiral discharging plates.

8. A charging skip for the smelting of magnesium as claimed in claim 1 characterised in that: An electronic hoist scale is arranged on the steel wire rope.

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