CN113399674B - Metal granulating device with more uniform particles and preparation method - Google Patents
Metal granulating device with more uniform particles and preparation method Download PDFInfo
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- CN113399674B CN113399674B CN202110677354.XA CN202110677354A CN113399674B CN 113399674 B CN113399674 B CN 113399674B CN 202110677354 A CN202110677354 A CN 202110677354A CN 113399674 B CN113399674 B CN 113399674B
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
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Abstract
The invention relates to a metal granulating device with more uniform particles and a preparation method, which are particularly suitable for ferronickel granulating preparation and belong to the technical field of metal particle preparation. The technical scheme is as follows: the distance between the hopper and the horizontal rotating granulating disc is adjusted by the lifting mechanism, so that the impact potential energy of high-temperature nickel iron water falling on the horizontal rotating granulating disc can be controlled, and the nickel iron particles produced in later period in earlier period can be granulated more uniformly. The hopper bottom is equipped with compression spring, gives the hopper through compression spring and provides the support, prevents that the hopper from shaking about the in-process that goes up and down, and the high temperature ferronickel alloy discharge that spills in the messenger hopper is more even, elevating system has the locking function, makes high temperature nickel molten iron rivers also more stable flow direction horizontal rotation granulation dish, and not bias current to further better realization ferronickel granulation granule is more even, improves product quality.
Description
Technical Field
The invention relates to a metal granulating device with more uniform particles and a preparation method, which are particularly suitable for ferronickel granulating preparation and belong to the technical field of metal particle preparation.
Background
Ferronickel is a common metal alloy, the most important purpose of the ferronickel is used for stainless steel furnace burden, and as a substitute of nickel, generally, 200 series stainless steel can directly use low-grade ferronickel, and 300 series stainless steel uses ferronickel with the grade of more than 8%. The nickel-iron particle products are used in a plurality of places, mainly in steel plants and foundries, and have the advantage of being convenient for transportation and feeding due to the short melting time of the nickel-iron particles, so that the nickel-iron particles are needed in the steelmaking process, the size of the nickel-iron particles determines the steelmaking smelting time, the more uniform the nickel-iron particles are, the smaller the particles are, the more favorable the steelmaking time is to be shortened, the electricity consumption and other costs are saved, and the better production is realized. For example, chinese patent No. CN201610659451.5, "a metal particle preparation apparatus and a preparation method", discloses a metal particle preparation apparatus comprising a rotary granulation system, a cooling system, a metal particle collection structure, and a cooling water collection structure; in the rotary granulating system, molten metal is injected into a rotary table, the rotary table is driven to rotate by the driving of a driving motor, so that the molten metal is granulated, a cooling system cools metal particles splashed out by granulation, a metal particle collecting structure collects falling metal particles, and a cooling water collecting structure collects falling cooling water. The prior art has the technical problems that: during treatment, in the process that the ladle is poured into the hopper at the later stage, the liquid level of molten iron in the hopper becomes low, and the static pressure of molten metal flow becomes small, so that the impact potential energy becomes small, so that the granulation umbrella formed by pouring the molten iron on the granulation disc becomes small, further the nickel iron particles become large, larger stalactite nickel-iron alloy particles can appear, the particles produced by the method are larger, and the particles produced in the earlier stage granulation process are smaller, so that the sizes of the nickel-iron alloy particles produced in the front and the back are not uniform, the production requirements are not met, screening and secondary melting granulation are required, and the production efficiency is influenced.
Disclosure of Invention
The invention aims to provide a metal granulating device with more uniform granules and a preparation method thereof, which control the impact potential energy of high-temperature ferronickel water falling on a horizontal rotary granulating disc by adjusting the distance between a hopper and the horizontal rotary granulating disc, realize more uniform granulation of ferronickel granules produced in later period in the early period, improve the product quality and solve the problems in the background technology.
The technical scheme of the invention is as follows:
a metal granulation apparatus with more uniform granules, comprising a granulation tank body, a disc type granulator, a hopper and a hot metal tank, wherein the disc type granulator comprises a horizontal rotary granulation disc, the hopper is positioned right above the horizontal rotary granulation disc, the horizontal rotary granulation disc is positioned in the granulation tank body, and the hot metal tank, the hopper and the horizontal rotary granulation disc are positioned on the same vertical central line, and the metal granulation apparatus is characterized in that: a lifting mechanism is arranged between the granulation tank body and the hopper, one end of the lifting mechanism is fixedly connected with the granulation tank body, the other end of the lifting mechanism is connected with the hopper, and the lifting mechanism adjusts the distance between the hopper and a horizontal rotating granulation disc in the granulation tank body; the lifting mechanism, the hot metal ladle, the hopper and the horizontal rotary granulating disc are positioned on the same vertical central line; the hopper comprises a chute.
The lifting mechanism comprises a crane, a lifting rod and a supporting lantern ring; the crane is arranged on the granulation tank body, the supporting lantern ring is sleeved on the outer side of the hopper, the lifting rod is arranged between the crane and the supporting lantern ring, and the crane drives the hopper to lift through the lifting rod and the supporting lantern ring.
The lifting rods are vertically arranged, and the number of the lifting rods is equal to that of the cranes.
And a locking mechanism is arranged on the crane and is positioned at the joint of the lifting rod and the crane.
The lifting mechanism comprises a compression spring, the compression spring is positioned between the granulation tank body and the hopper, the compression spring is vertically placed, and two ends of the compression spring are fixedly connected with the granulation tank body and the hopper respectively.
The number of the compression springs is multiple.
The lifting mechanism is also provided with a safety rope and an infrared travel switch; the infrared travel switch is positioned on the supporting lantern ring, one end of the safety rope is fixedly connected with the supporting lantern ring, and the other end of the safety rope is connected with the fixed beam at the top of the workshop.
And a liquid level sensor is arranged on the inner wall of the hopper and used for detecting the liquid level of the high-temperature nickel molten iron in the hopper. The hopper, which may also be referred to as a fixed chute, has a refractory lining material therein.
The upper part of the granulation tank body is provided with a granulation smoke dust collecting bin which is of an annular pipe structure and is connected with an exhaust chimney provided with an induced draft fan through a dust removal interface.
The granulating tank is characterized in that a granulating treatment bin is arranged in the middle of the granulating tank body, a disc-type granulator is arranged in the center of the granulating treatment bin, the disc-type granulator is vertically placed, a horizontal rotating granulating disc is arranged at the top of the disc-type granulator, and the horizontal rotating granulating disc is driven to rotate by a driving device.
The disc type granulator is fixed with the granulation tank body through at least three horizontal supporting plates arranged in a radial mode, and the horizontal supporting plates are fixedly connected with the upper portion of the disc type granulator.
The lower part of the granulation tank body is provided with a water quenching treatment bin, and the top of the water quenching treatment bin is provided with an overflow backwater mechanism; the upper part of the water quenching treatment bin is provided with a grid filter, and high-temperature nickel-iron water particles are filtered by the grid filter before entering the lower part of the water quenching treatment bin, so that particles with overlarge particle sizes are separated, and the granulated slag with the overlarge particle sizes is prevented from blocking an outlet; the grating filter is horizontally arranged, one side of the grating filter is fixed with the granulating tank body, and the other side of the grating filter is fixedly connected with the lower part of the disc type granulator.
The middle part of the water quenching treatment bin is provided with a plurality of layers of water spraying mechanisms which are in a ring-shaped tubular shape and are uniformly arranged around the inner wall of the water quenching treatment bin, the water spraying mechanisms are provided with a plurality of water spraying nozzles, and the water spraying nozzles are arranged towards the circle center of the water spraying mechanisms and are distributed on the water spraying mechanisms at equal intervals; the diameter of each layer of annular tubular water spraying mechanisms is reduced from top to bottom in sequence.
The method for preparing the metal granules with more uniform granules can control the impact potential energy of high-temperature nickel iron water falling on a horizontal rotating granulation disc by adjusting the distance between a hopper and the horizontal rotating granulation disc through a lifting mechanism, and can realize more uniform granulation of the nickel iron granules produced in the later period in the early period.
The hopper bottom is equipped with compression spring, gives the hopper through compression spring and provides the support, prevents that the hopper from trembling from top to bottom at the in-process that goes up and down, and the high temperature ferronickel alloy water flow that spills in making the hopper is more even to further make the ferronickel granule size of producing more even.
The lifting mechanism has a locking function, so that the water flow of the high-temperature molten nickel iron can flow to the horizontal rotating granulating disc more stably without bias flow, and further, the ferronickel granulating particles can be more uniform.
The specific operation steps are as follows:
s1: collecting the high-temperature molten nickel iron into a molten iron tank, starting a disk type granulator, and starting a horizontal rotating granulating disk to rotate;
s2: injecting high-temperature molten nickel iron into a hopper, wherein a lower outlet of the hopper is positioned right above a horizontal rotating granulating disc, the hopper guides the high-temperature molten nickel iron to fall onto the horizontal rotating granulating disc, and the horizontal rotating granulating disc is used for carrying out centrifugal sputtering granulation treatment to form high-temperature molten nickel iron particles;
s3: after the ferronickel particles fall into a water quenching treatment bin, forming ferronickel fine particles through water quenching treatment;
s4: when the liquid level of the high-temperature molten nickel iron in the hopper is low, the liquid level sensor gives an alarm, the crane is started, the crane pushes up the lifting rod, the lifting rod pushes up the supporting sleeve ring, the supporting sleeve ring is sleeved on the hopper, and the hopper is lifted towards the direction far away from the granulation tank body.
The invention has the beneficial effects that: compared with the prior art, the invention combines the disc type granulator and the lifting mechanism, and can control the impact potential energy of the high-temperature ferronickel water falling on the horizontal rotary granulating disc by adjusting the distance between the hopper and the horizontal rotary granulating disc, thereby realizing more uniform granulation of ferronickel granules produced in later period in earlier period. Give the hopper through compression spring and provide the support, prevent that the hopper from shaking about the in-process that goes up and down, make the high temperature ferronickel alloy discharge of spilling in the hopper more even to further make the ferronickel granule size of producing more even. The locking mechanism locks the crane and the lifting rod, so that the connection between the lifting rod and the crane is more stable, the high-temperature molten nickel iron water flow flows to the horizontal rotating granulation disc more stably without bias flow, and further, the ferronickel granulation particles are more uniform.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of part A of the lifting mechanism according to the embodiment of the present invention;
FIG. 3 is a schematic view of a water spraying mechanism according to an embodiment of the present invention;
in the figure: 1. granulating the tank body; 11. a nickel iron water inlet; 12. a granulated smoke dust collecting bin; 121. a dust removal interface; 13. a granulation treatment bin; 14. a water quenching treatment bin; 141. a grille filter; 142. an overflow backwater mechanism; 143. a water spraying mechanism; 1431. a water spray nozzle; 144. a valve; 2. a pan granulator; 21. horizontally rotating the granulating disc; 22. a horizontal support plate; 3. a lifting mechanism; 31. a crane; 32. a lifting rod; 33. a support collar; 34. a locking mechanism; 35. a compression spring; 36. a safety rope; 37. an infrared travel switch; 4. a hopper; 41. a liquid level sensor; 5. a hot metal ladle.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
A metal granulation device with more uniform granules, comprising a granulation tank body 1, a disc type granulator 2, a hopper 4 and a hot metal tank 5, wherein the disc type granulator 2 comprises a horizontal rotating granulation disc 21, the hopper 4 is positioned right above the horizontal rotating granulation disc 21, the horizontal rotating granulation disc 21 is positioned inside the granulation tank body 1, and the hot metal tank 5, the hopper 4 and the horizontal rotating granulation disc 21 are positioned on the same vertical central line, which is characterized in that: a lifting mechanism 3 is arranged between the granulation tank body 1 and the hopper 4, one end of the lifting mechanism 3 is fixedly connected with the granulation tank body 1, the other end of the lifting mechanism 3 is connected with the hopper 4, and the lifting mechanism 3 adjusts the distance between the hopper and a horizontal rotary granulation disc 21 in the granulation tank body 1; the lifting mechanism 3, the hot metal ladle 5, the hopper 4 and the horizontal rotary granulating disc 21 are positioned on the same vertical central line; the hopper 4 comprises a chute.
The lifting mechanism 3 comprises a crane 31, a lifting rod 32 and a supporting collar 33; the crane 31 is arranged on the granulation tank body 1, the supporting collar 33 is sleeved outside the hopper 4, the lifting rod 32 is arranged between the crane 31 and the supporting collar 33, and the crane 31 drives the hopper 4 to lift through the lifting rod 32 and the supporting collar 33.
The lifting rods 32 are vertically arranged, and the number of the lifting rods 32 is equal to that of the cranes 31.
The crane 31 is provided with a locking mechanism 34, and the locking mechanism 34 is located at the connection position of the lifting rod 32 and the crane 31.
The lifting mechanism 3 comprises a compression spring 35, the compression spring 35 is positioned between the granulation tank body 1 and the hopper 4, the compression spring 35 is vertically arranged, and two ends of the compression spring 35 are respectively fixedly connected with the granulation tank body 1 and the hopper 4.
The number of the compression springs 35 is plural.
The lifting mechanism 3 is also provided with a safety rope 36 and an infrared travel switch 37; the infrared travel switch 37 is positioned on the supporting lantern ring 33, one end of the safety rope 36 is fixedly connected with the supporting lantern ring 33, and the other end of the safety rope 36 is connected with a fixed beam at the top of the workshop.
And a liquid level sensor 41 is arranged on the inner wall of the hopper 4 and is used for detecting the liquid level of the high-temperature molten nickel iron in the hopper 4. The hopper 4 may also be referred to as a fixed chute and has a refractory lining material therein.
The upper part of the granulation tank body 1 is provided with a granulation smoke dust collecting bin 12, the granulation smoke dust collecting bin 12 is of an annular pipe structure and is connected with an exhaust chimney provided with an induced draft fan through a dust removal connector 121.
The granulating tank comprises a granulating tank body 1, a granulating treatment bin 13 is arranged in the middle of the granulating tank body 1, a disc type granulator 2 is arranged in the center of the granulating treatment bin 13, the disc type granulator 2 is vertically placed, a horizontal rotating granulating disc 21 is arranged on the top of the disc type granulator 2, and the horizontal rotating granulating disc 21 is driven to rotate by a driving device.
The disc-type granulator 2 is fixed with the granulation tank body 1 through at least three horizontal support plates 22 arranged in a radial mode, and the horizontal support plates 22 are fixedly connected with the upper portion of the disc-type granulator 2.
The lower part of the granulation tank body 1 is provided with a water quenching treatment bin 14, and the top of the water quenching treatment bin 14 is provided with an overflow water return mechanism 142; the upper part of the water quenching treatment bin 14 is provided with a grating filter 141, and high-temperature nickel iron water particles are filtered by the grating filter 141 before entering the lower part of the water quenching treatment bin 14, so that particles with overlarge particle sizes are separated, and the granulated slag with overlarge particle sizes is prevented from blocking an outlet; the grating filter 141 is horizontally arranged, one side of the grating filter 141 is fixed with the granulation tank body 1, and the other side of the grating filter 141 is fixedly connected with the lower part of the disc type granulator 2.
The middle part of the water quenching treatment bin 14 is provided with a plurality of layers of water spraying mechanisms 143, the water spraying mechanisms 143 are in a circular ring shape and are uniformly arranged around the inner wall of the water quenching treatment bin 14, the water spraying mechanisms 143 are provided with a plurality of water spraying nozzles 1431, the water spraying nozzles 1431 are arranged towards the circle center of the water spraying mechanisms 143 and are distributed on the water spraying mechanisms 143 at equal intervals; the diameter of each layer of the annular tubular water spraying mechanisms 143 is gradually reduced from top to bottom.
The method for preparing the metal granules with more uniform granules can control the impact potential energy of high-temperature nickel iron water falling on a horizontal rotating granulation disc by adjusting the distance between a hopper and the horizontal rotating granulation disc through a lifting mechanism, and can realize more uniform granulation of the nickel iron granules produced in the later period in the early period.
The hopper bottom is equipped with compression spring, gives the hopper through compression spring and provides the support, prevents that the hopper from shaking from top to bottom at the in-process that goes up and down, and the high temperature ferronickel alloy discharge that spills in the messenger hopper is more even to further make the ferronickel granule size of producing more even.
The lifting mechanism has a locking function, so that the water flow of the high-temperature molten nickel iron can flow to the horizontal rotating granulating disc more stably without bias flow, and further, the ferronickel granulated particles can be more uniform.
The invention is prepared by the metal granulating device, and the specific operation steps are as follows:
s1: collecting the high-temperature molten nickel iron into a molten iron tank 5, starting the disc type granulator 2, and starting to rotate the horizontal rotating granulating disc 21;
s2: injecting high-temperature molten nickel iron into a hopper 4, wherein the lower outlet of the hopper 4 is positioned right above a horizontal rotating granulating disc 21, the hopper 4 guides the high-temperature molten nickel iron to fall onto the horizontal rotating granulating disc 21, and the horizontal rotating granulating disc 21 is used for carrying out centrifugal sputtering granulation treatment to form high-temperature molten nickel iron particles;
s3: after the ferronickel particles fall into the water quenching treatment bin 14, fine ferronickel particles are formed through water quenching treatment;
s4: when the liquid level of the molten high-temperature nickel iron in the hopper 4 is low, the liquid level sensor 41 gives an alarm, the crane 31 is started, the crane 31 pushes up the lifting rod 32, the lifting rod 32 pushes up the support collar 33, the support collar 33 is sleeved on the hopper 4, and the hopper 4 is lifted towards the direction far away from the granulation tank body 1.
The specific implementation mode is as follows: reference is made to figures 1, 2 and 3.
A metal granulating device with more uniform particles comprises a granulating tank body 1, a disc-type granulator 2, a lifting mechanism 3, a hopper 4 and a hot metal ladle 5. The granulation tank body 1 is in a conical cylinder shape, an opening is formed in the top of the granulation tank body 1, namely a ferronickel water injection port 11 is formed, a lifting mechanism 3 and a hopper 4 are arranged right above the ferronickel water injection port 11, the lifting mechanism 3 comprises cranes 31, the number of the cranes 31 is determined according to actual conditions, the number of the cranes 31 is 4, and the cranes 31 are uniformly distributed along the periphery of the ferronickel water injection port 11. The 4 cranes 31 are identical in structure and size, and only one crane will be described here as an example. The crane 31 is fixedly connected with the upper end face of the granulation tank body 1, one end of the crane 31, which is far away from the granulation tank body 1, is provided with lifting rods 32, the lifting rods 32 are vertically arranged, and the number of the lifting rods 32 is equal to that of the crane 31, and is 4. The lifting rod 32 is fixedly connected with the crane 31, and the connection mode is determined according to actual conditions.
The connecting part of the crane 31 and the lifting rod 32 is provided with a locking mechanism 34, the locking mechanism 34 can be locked when the crane 31 reaches an upper limit position and the crane 31 reaches a lower limit position, so that the connection between the lifting rod 32 and the crane 31 is more stable, and the number of the locking mechanisms 34 is equal to that of the lifting rod 32 and the crane 31 and is 4.
One end fixedly connected with of hoist 31 is kept away from to lifter 32 supports lantern ring 33, support lantern ring 33 level is placed, support lantern ring 33 cover is in the hopper 4 outside, still be equipped with infrared travel switch 37 on the support lantern ring 33, infrared travel switch 37 is located the one side setting of support lantern ring 33 towards hoist 31. The number of the infrared travel switches 37 is 1. The infrared travel switch 37 is a conventional one, and its model may be determined according to actual conditions, and will not be described herein too much.
A safety rope 36 is further arranged on the support lantern ring 33, one end of the safety rope 36 is fixedly connected with the support lantern ring 33, and one end of the safety rope 36 far away from the support lantern ring 33 is connected with a fixed beam (the fixed beam is omitted in the drawing). The quantity of safety rope 36 is 4, and when accident took place, perhaps hoist 31 and lifter 32 damage, rupture, safety rope 36 can hold support lantern ring 33 and hopper 4 in emergency, and then prevents that hopper 4 from dropping, makes high temperature ferronickel water splash and takes place danger.
And a liquid level sensor 41 is arranged on the inner wall of the hopper 4 and can detect the liquid level of the high-temperature molten nickel iron in the hopper 4. The level sensor 41 is of the prior art and may be of a type that is practical and will not be described herein in greater detail. The hopper 4 may also be referred to as a fixed chute, with a refractory lining material therein. One side of the bottom of the hopper 4, which is close to the granulation tank body 1, is provided with compression springs 35, the compression springs 35 are vertically arranged, the compression springs 35 are uniformly distributed on the outer bottom surface of the hopper 4 along the center of the hopper 4, and the number of the compression springs 35 is 4.
The upper part of the granulation tank body 1 is provided with a granulation smoke dust collecting bin 12, the granulation smoke dust collecting bin 12 is of a ring pipe structure and is connected with an exhaust chimney (the exhaust chimney is omitted in the attached drawing) provided with an induced draft fan through a dust removal connector 121.
The granulation tank is characterized in that a granulation treatment bin 13 is arranged in the middle of the granulation tank body 1, a disc type granulator 2 is arranged in the center of the granulation treatment bin 13, and the disc type granulator 2 is vertically arranged. The top of the disc type granulator 2 is provided with a horizontal rotating granulating disc 21, the horizontal rotating granulating disc 21 is driven to rotate by a driving device, the driving device is the prior art, and redundant description is not provided herein.
The disc type granulator 2 is fixed with the granulation tank body 1 through at least three horizontal support plates 22 arranged in a radial mode, and the horizontal support plates 22 are fixedly connected with the upper portion of the disc type granulator 2.
The lower part of the granulation tank body 1 is provided with a water quenching treatment bin 14, and the top of the water quenching treatment bin 14 is provided with an overflow water return mechanism 142. The upper part of the water quenching treatment bin 14 is provided with a grid filter 141, and high-temperature nickel iron water particles are filtered by the grid filter 141 before entering the lower part of the water quenching treatment bin 14, so that particles with overlarge particle sizes are separated, and the granulated slag with overlarge particle sizes is prevented from blocking an outlet. In addition, the grid filter 141 is horizontally arranged, one side of the grid filter 141 is fixed with the granulation tank 1, and the side far away from the granulation tank 1 is fixedly connected with the lower part of the disc type granulator 2.
The middle part of the water quenching treatment bin 14 is provided with a water spraying mechanism 143, the water spraying mechanism 143 is in a ring-shaped tubular shape and evenly arranged around the inner wall of the water quenching treatment bin 14, the number of the water spraying mechanisms 143 is 3, the diameters of the water spraying mechanisms 143 are different, the water spraying mechanisms 143 are concentrically arranged and are distributed at intervals from top to bottom, and the interval distances are equal. The water spraying mechanisms 143 are arranged from top to bottom in sequence from large to small in diameter. The water spraying mechanism 143 is provided with a plurality of water spraying nozzles 1431, and the water spraying nozzles 1431 are arranged on one side of the water spraying mechanism 143 facing the center of the circle and are distributed on the water spraying mechanism 143 at equal intervals.
In order to increase the service life of the granulation tank body 1, the granulation tank body 1 is coated with an abrasion-resistant and heat-resistant coating. The bottom of the water quenching treatment bin 14 is provided with a valve 144, and the valve 144 can be a closed rotary blade feeder (or called rotary valve), which belongs to the prior art and is not described in detail.
The preparation method comprises the following specific steps:
s1: the high-temperature molten nickel iron is collected into a molten iron tank 5, the disk granulator 2 is started, and the horizontal rotary granulating disk 21 starts to rotate.
S2: injecting high-temperature molten nickel iron into a hopper 4, wherein the lower outlet of the hopper 4 is positioned right above a horizontal rotating granulating disc 21, the hopper 4 guides the high-temperature molten nickel iron to fall onto the horizontal rotating granulating disc 21, and the horizontal rotating granulating disc 21 is used for carrying out centrifugal sputtering granulation treatment to form high-temperature molten nickel iron particles.
S3: after the ferronickel particles fall into the water quenching treatment bin 14, ferronickel fine particles are formed through water quenching treatment.
S4: when the liquid level of the high-temperature molten nickel iron in the hopper 4 is low, the liquid level sensor 41 gives an alarm, the crane 31 is started, the crane 31 pushes up the lifting rod 32, the lifting rod 32 pushes up the supporting sleeve ring 33, the supporting sleeve ring 33 is sleeved on the hopper 4, and the hopper 4 is lifted towards the direction away from the granulation tank body 1.
Through adjusting the distance between hopper 4 and the horizontal rotation granulation disc 21, can realize the impact potential energy size regulation between hopper 4 and the horizontal rotation granulation disc 21, when the distance between hopper 4 and the horizontal rotation granulation disc 21 grow, under the effect of gravity, the distance that high temperature nickel molten iron falls is bigger, the impact potential energy to horizontal rotation granulation disc 21 is bigger, therefore metal "umbrella" grow that high temperature nickel molten iron falls on horizontal rotation granulation disc 21 and four scatter and form, the ferronickel granule of production diminishes, and then can prevent to empty the in-process to hopper 4 because of hot metal bottle 5 in the later stage, the liquid level of high temperature nickel molten iron in hopper 4 step-down, the static pressure of high temperature ferronickel rivers diminishes, thereby avoided the impact potential energy to lead to empting the problem that forms the granule grow at horizontal rotation granulation disc 21 and taken place, reached ferronickel alloy more even effect of granulating.
Claims (5)
1. A method for preparing metal granules with more uniform granules is characterized in that: the adjustment of the impact potential energy between the hopper (4) and the horizontal rotating granulating disc (21) is realized by adjusting the distance between the hopper (4) and the horizontal rotating granulating disc (21); the specific operation steps are as follows:
s1: collecting high-temperature molten nickel iron into a molten iron tank (5), starting a disc type granulator (2), and starting to rotate a horizontal rotating granulating disc (21);
s2: injecting high-temperature molten nickel iron into a hopper (4), wherein a lower outlet of the hopper (4) is positioned right above a horizontal rotary granulating disc (21), the hopper (4) guides the high-temperature molten nickel iron to fall onto the horizontal rotary granulating disc (21), and the horizontal rotary granulating disc (21) is used for carrying out centrifugal sputtering granulation treatment to form high-temperature molten nickel iron particles;
s3: after the ferronickel particles fall into a water quenching treatment bin (14), ferronickel fine particles are formed through water quenching treatment;
s4: when the liquid level of the high-temperature nickel molten iron in the hopper (4) is lower, the liquid level sensor gives an alarm, the crane (31) is started, the crane (31) pushes up the lifting rod (32), the lifting rod (32) pushes up the supporting sleeve ring (33), the supporting sleeve ring (33) is sleeved on the hopper (4), and the hopper (4) is lifted towards the direction far away from the granulation tank body (1);
the metal granulating device used in the preparation method comprises a granulating tank body (1), a disc-type granulator (2), a hopper (4) and a molten iron tank (5), wherein the disc-type granulator (2) comprises a horizontal rotating granulating disc (21), the hopper (4) is positioned right above the horizontal rotating granulating disc (21), the horizontal rotating granulating disc (21) is positioned in the granulating tank body (1), the molten iron tank (5), the hopper (4) and the horizontal rotating granulating disc (21) are positioned on the same vertical central line, a lifting mechanism (3) is arranged between the granulating tank body (1) and the hopper (4), one end of the lifting mechanism (3) is fixedly connected with the granulating tank body (1), the other end of the lifting mechanism (3) is connected with the hopper (4), and the lifting mechanism (3) adjusts the distance between the hopper and the horizontal rotating granulating disc (21) in the granulating tank body (1); the lifting mechanism (3), the hot metal ladle (5), the hopper (4) and the horizontal rotary granulating disc (21) are positioned on the same vertical central line; the hopper (4) comprises a chute;
the lifting mechanism (3) comprises a crane (31), a lifting rod (32) and a supporting lantern ring (33); the crane (31) is arranged on the granulation tank body (1), the supporting sleeve ring (33) is sleeved on the outer side of the hopper (4), a lifting rod (32) is arranged between the crane (31) and the supporting sleeve ring (33), and the crane (31) drives the hopper (4) to lift through the lifting rod (32) and the supporting sleeve ring (33);
and a liquid level sensor (41) is arranged on the inner wall of the hopper (4) and is used for detecting the liquid level of the high-temperature molten nickel iron in the hopper (4).
2. The method for preparing metal granules more uniformly according to claim 1, wherein: the lifting mechanism (3) comprises a compression spring (35), the compression spring (35) is positioned between the granulation tank body (1) and the hopper (4), the compression spring (35) is vertically placed, and two ends of the compression spring (35) are fixedly connected with the granulation tank body (1) and the hopper (4) respectively.
3. A method of producing metal granules with more uniform granules according to claim 1 or 2, wherein: the crane (31) is provided with a locking mechanism (34), and the locking mechanism (34) is positioned at the joint of the lifting rod (32) and the crane (31).
4. A method of producing metal granules with more uniform granules according to claim 1 or 2, wherein: the lower part of the granulation tank body (1) is provided with a water quenching treatment bin (14), and the top of the water quenching treatment bin (14) is provided with an overflow water return mechanism (142); the upper part of the water quenching treatment bin (14) is provided with a grid filter (141), and high-temperature nickel iron water particles are filtered by the grid filter (141) before entering the lower part of the water quenching treatment bin (14) to separate particles with overlarge particle sizes and prevent granulated slag with overlarge particle sizes from blocking an outlet; the grating filter (141) is horizontally arranged, one side of the grating filter (141) is fixed with the granulating tank body (1), and the other side of the grating filter is fixedly connected with the lower part of the disc type granulator (2).
5. A method of producing metal granules with more uniform granules according to claim 1 or 2, wherein: the middle of the water quenching treatment bin (14) is provided with a plurality of layers of water spraying mechanisms (143), the water spraying mechanisms (143) are in a circular ring tube shape and are uniformly arranged around the periphery of the inner wall of the water quenching treatment bin (14), the water spraying mechanisms (143) are provided with a plurality of water spraying nozzles (1431), the water spraying nozzles (1431) face the circle center of the water spraying mechanisms (143) and are distributed on the water spraying mechanisms (143) at equal intervals; the diameter of each layer of water spraying mechanisms (143) in an annular tube shape is reduced from top to bottom in sequence.
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3510546A (en) * | 1967-12-15 | 1970-05-05 | Homogeneous Metals | Methods for powdering metals |
| FR2662102B1 (en) * | 1990-05-16 | 1992-07-31 | Centre Nat Rech Scient | DEVICE FOR THE PREPARATION OF POWDER ALLOYS BY RAPID SOLIDIFICATION. |
| JPH04202706A (en) * | 1990-11-30 | 1992-07-23 | Kawasaki Steel Corp | Production of metal powder |
| JPH05311270A (en) * | 1992-05-12 | 1993-11-22 | Seiko Epson Corp | Manufacture of alloy for rare earth metal bond magnet |
| JPH06220508A (en) * | 1993-01-28 | 1994-08-09 | Kawasaki Steel Corp | Apparatus for production of metallic powder |
| WO2010010627A1 (en) * | 2008-07-25 | 2010-01-28 | 産機電業株式会社 | Device and method for manufacturing fine powder by using rotary crucible |
| CN202555827U (en) * | 2011-11-15 | 2012-11-28 | 唐山市嘉恒实业有限公司 | Ferronickel granulation processing apparatus |
| CN107520454A (en) * | 2017-09-30 | 2017-12-29 | 重庆赛迪热工环保工程技术有限公司 | A kind of metal granulating system and method |
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