CN210146991U - Ferroalloy granulating device - Google Patents

Abstract

The utility model relates to a ferroalloy granulation device, which comprises a turntable granulation system, a tundish casting system and a release agent spraying system. The ferroalloy molten liquid flows into the turntable granulation system from the tundish casting system, and the release agent spraying system sprays mist The mold release agent is sprayed evenly on the surface of the turntable granulation system. The turntable granulation system includes a support base, a turntable, a collection tank, and a transmission mechanism. The support base is provided with a turntable, and a collection groove is arranged around the turntable. Drive to rotate, the center of the turntable is a conical protrusion, and the circumference of the turntable outside the conical protrusion is evenly distributed with several arc-shaped chutes from the center of the turntable to the outside, and the bottom surface is arc-shaped, and the chutes are at the same angle. It is inclined along the radial direction of the turntable, and the molten iron alloy flows from the conical protrusion into the chute, and aggregates, cools and solidifies to form iron alloy particles during the rotation of the turntable. The utility model can produce ferroalloy particles according to the required granularity.

Description

A ferroalloy granulation device

technical field

The utility model relates to the technical field of metal particle preparation, in particular to an iron alloy granulation device.

Background technique

Ferroalloy is an intermediate alloy composed of iron and one or several elements. It can be used as deoxidizer, alloying agent, inoculant and reducing agent in steelmaking. There are strict requirements on the particle size of ferroalloys. Ferroalloys with too small particle sizes will float on the surface of molten steel and will be lost by oxidation of the slag. Ferroalloys with too large particle sizes will sink to the bottom of the ladle and cannot be melted uniformly, which affects the uniformity of steel composition. Therefore, it is commonly used. The iron alloy particles are in the range of about 10mm to 70mm. At present, the method of obtaining ferroalloy generally adopts the traditional method of die casting + mechanical crushing and manual crushing. However, this processing method consumes a lot of energy, has a high crushing and pulverization rate, and causes serious environmental pollution.

In view of this situation, domestic and foreign scholars have proposed the direct granulation technology of ferroalloy. Most of the domestic ferroalloy granulation process is to improve the continuous casting part, such as the continuous casting granulation technology of crystallizer and the granulation technology of ferroalloy continuous casting. Although these two technologies can obtain ferroalloy products with the particle size required by the industry, they still There is a disadvantage that secondary crushing is required; the direct granulation technology of foreign ferroalloys mainly includes processes such as Mintek Blobulator and GRANSHOT. The two production processes do not require secondary crushing, and both can produce the required Iron alloy particles, but the iron alloy particles prepared by the casting method have the disadvantages of a single particle size and a small particle size range. When the GRANSHOT granulation technology prepares ferrosilicon alloy particles, due to the microstructure phase change of the ferrosilicon alloy at high temperature, the granulation process There will be more serious chalking phenomenon.

In recent years, a new type of ferroalloy centrifugal granulation technology has received extensive attention. It uses the centrifugal force of high-speed rotation to break the liquid metal centrifugal drawing into small droplets, which are then rapidly solidified. Although this process has a simple structure, the particle size of the prepared metal particles is small. too small.

Patent Publication (Announcement) No.: CN 106077686A proposes a metal particle preparation device and preparation method, which uses a rapidly rotating small disc to disperse the molten metal poured on the small disc to obtain granulated metal particles; patent disclosure (Announcement) No.: CN 207170959U proposes a centrifugal granulation device with a porous rotating cup, which uses a high-speed rotating porous cup to granulate molten metal into granules with a large centrifugal force. In the above granulation method, due to the too small volume of the core granulation component, the molten metal does not have a process of flowing and gathering, and the particle size of the metal particles obtained by granulation is small.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to provide a ferroalloy granulation device, which can prepare ferroalloy granules with a particle size that meets actual production requirements.

To achieve the above object, the present utility model adopts the following technical solutions to realize:

A ferroalloy granulation device, comprising a turntable granulation system, a tundish casting system, and a mold release agent spraying system, the ferroalloy molten liquid flows into the turntable granulation system from the tundish casting system, and the mold release agent spraying system at the same time. The mold agent is evenly sprayed on the surface of the turntable granulation system. The turntable granulation system includes a support base, a turntable, a collection groove, and a transmission mechanism. The support base is provided with a turntable, and a collection groove is arranged around the turntable. The center of the turntable is a conical protrusion, and the upper circumference of the turntable outside the conical protrusion is evenly distributed with several arc-shaped chutes whose bottom surface is arc-shaped from the center of the turntable to the outside, and the bottom surface is arc-shaped. The direction is inclined and the iron alloy melt flows into the chute from the conical protrusion. During the rotation of the turntable, the iron alloy particles are formed after aggregation, cooling and solidification.

The transmission mechanism includes a slewing bearing, a pinion, a reducer, and a motor. The motor is connected to the reducer and is fixed under the support base. The output shaft of the reducer is connected to a pinion. The pinion meshes with the external teeth of the slewing bearing. Attached below the turntable.

The tundish casting system includes a tundish and a diversion groove; the tundish is arranged above the turntable granulation system, and there is a tap hole in the center of the bottom of the tundish, and the tap hole is connected to the diversion groove set obliquely downward, and the tap hole is connected to the diversion groove set obliquely downward. The outlet of the launder is located above the middle of the turntable.

The mold release agent spraying system includes a nozzle, a spray pipe, a connecting hose, a pump and a mold release agent storage tank; the mold release agent storage tank is sequentially connected to the pump, the connecting hose, and the spray pipe, and the spray pipe is arranged above the turntable, There are multiple nozzles under the nozzle, and the release agent is evenly sprayed onto the surface of the turntable by the nozzles.

Several connecting holes are arranged on the circumference of the turntable, the turntable is bolted to the outer ring of the slewing bearing through the connecting holes, and the inner ring of the slewing bearing is fixedly connected to the support base.

The cross section of the chute is semi-elliptical, and the inclination angle A between the center line of the chute and the radial direction of the turntable is 6-12°. The ratio of the width of the narrowest part of the chute to the width of the widest part is 1:2-3, the ratio of the depth of the narrowest part to the widest part of the chute is 1:0.4-0.6, the depth of the narrowest part of the chute to the narrowest part The width ratio is 1:2-3.

The particle size of the iron alloy particles formed by the iron alloy granulation device is 0.6-0.7 times the depth of the narrowest part of the chute.

Compared with the prior art, the beneficial effects of the present utility model are:

In the utility model, when the turntable rotates at a predetermined speed, the ferroalloy molten liquid flowing into the turntable gradually and uniformly flows into the chute through the conical surface in the center of the turntable, so that the liquid ferroalloy flow is gathered in the chute, and flows more easily under the action of the rotating centrifugal force. The utility model can design turntables of chutes of different sizes, and the ferroalloy particles of different particle sizes can be obtained by replacing the turntable, and the ferroalloy particles can be produced according to the required particle size.

Description of drawings

FIG. 1 is a schematic structural diagram 1 of the present utility model.

FIG. 2 is a schematic structural diagram 2 of the utility model.

Figure 3 is a schematic diagram of the interior of the rotary disk granulation system.

FIG. 4 is a schematic view of the structure of the turntable.

In the figure: tundish casting system 1, turntable granulation system 2, release agent spraying system 3; tundish 11 and diversion groove 12; support base 21, collecting groove 22, turntable 23, conical protrusion 24, chute 25, Motor 26 , reducer 27 , pinion 28 , slewing bearing 29 ; release agent storage tank 31 , pump 32 , connecting hose 33 , nozzle 34 , nozzle 35 .

Detailed ways

The specific embodiments of the present utility model are further described below in conjunction with the accompanying drawings:

As shown in Figures 1-4, a ferroalloy granulation device includes a tundish casting system 1, a turntable granulation system 2, and a mold release agent spraying system 3.

The turntable granulation system includes 2 support bases 21, collection grooves 22, turntables 23, and transmission mechanisms. The support bases 21 are provided with a turntable 23, and a collection groove 22 is arranged around the turntable 23. The turntable 23 is driven by a drive mechanism to rotate.

The transmission mechanism includes a slewing bearing 29, a pinion 28, a reducer 27, and a motor 26. The motor 26 is connected to the reducer 27 and is fixed under the support base 21. The output shaft of the reducer 27 is connected to the pinion 28. The pinion 28 and the slewing bearing 29 The outer teeth of the slewing bearings mesh with each other, and the slewing bearing 29 is connected below the turntable 23 . Several connecting holes are arranged on the circumference of the turntable 23 , the turntable is bolted to the outer ring of the slewing bearing 29 through the connecting holes, and the inner ring of the slewing bearing 29 is fixedly connected to the support base 21 .

The center of the turntable 23 is a conical protrusion 24, and the upper circumference of the turntable 23 outside the conical protrusion 24 is evenly distributed with a number of circular arc-shaped chutes 25 whose bottom surface is arc-shaped from the center of the turntable to the outside, and the bottom surface of the chutes 25 is the same. The angle is inclined along the radial direction of the turntable, the cross section of the chute 25 is semi-elliptical, and the inclination angle A between the center line of the chute 25 and the radial direction of the turntable is 6-12°. The ratio of the width of the narrowest part to the widest part of the chute 25 is 1:2-3, the ratio of the depth of the narrowest part to the widest part of the chute 25 is 1:0.4-0.6, and the depth of the narrowest part of the chute 25 is 1:0.4-0.6. The width ratio at the narrowest point is 1:2-3.

The tundish casting system 1 includes a tundish 11 and a diversion groove 12; the tundish 11 is arranged above the turntable granulation system 2, and there is a tap hole at the center of the bottom of the tundish 11, which is connected to a diversion set obliquely downward The slot 12 and the outlet of the guide slot 12 are arranged above the middle of the turntable 23 . The mold release agent spraying system 3 includes a nozzle 35, a nozzle pipe 34, a connecting hose 33, a pump 32 and a mold release agent storage tank 31; The pipe 34 is arranged above the turntable 23, a plurality of nozzles 35 are arranged below the nozzle 34, and the release agent is atomized and sprayed onto the surface of the turntable by the nozzles 35; effect.

The ferroalloy melt flows from the tundish casting system 1 into the turntable granulation system 2, while the release agent spraying system 3 evenly sprays the atomized release agent on the surface of the turntable granulation system, and the ferroalloy melt flows from the conical protrusion 24. In the chute 25, during the rotation of the turntable, ferroalloy particles with a particle size of 0.6-0.7 times the depth of the narrowest part of the chute are formed after being aggregated, cooled and solidified. When changing the width and depth of the chute on the turntable, ferroalloy particles of different particle sizes can be obtained to meet the requirements of different demanders for the particle size of iron alloys.

The above is only the basic principle of the present utility model, and does not limit the present utility model. Any equivalent changes and modifications made to it according to the present utility model are all within the scope of the technical protection scheme of this patent.

Claims (7)

1. a ferroalloy granulation device, it is characterized in that, comprise turntable granulation system, tundish casting system, release agent spraying system, ferroalloy molten liquid flows into turntable granulation system from tundish casting system, release agent spraying system simultaneously Spray the atomized release agent evenly on the surface of the turntable granulation system. The turntable granulation system includes a support base, a turntable, a collection tank, and a transmission mechanism. The support base is provided with a turntable, and a collection groove is arranged around the turntable. The drive mechanism drives to rotate, the center of the turntable is a conical protrusion, and the circumference of the turntable outside the conical protrusion is evenly distributed with a number of arc-shaped chutes from the center of the turntable to the outside, from wide to narrow, from shallow to deep. The angle is inclined along the radial direction of the turntable, and the molten iron alloy flows from the conical protrusion into the chute, and aggregates, cools and solidifies to form iron alloy particles during the rotation of the turntable. 2. A ferroalloy granulation device according to claim 1, characterized in that the transmission mechanism comprises a slewing bearing, a pinion, a reducer, and a motor, and the motor is connected to the reducer and fixed under the support base, and the reducer is fixed under the support base. The output shaft is connected with a pinion, which meshes with the external teeth of the slewing bearing, and the slewing bearing is connected below the turntable. 3 . The ferroalloy granulation device according to claim 1 , wherein the tundish casting system comprises a tundish and a diversion groove; the tundish is arranged above the turntable granulation system, and the center of the bottom of the tundish is located at the center of the tundish. 4 . There is a tap hole, the tap hole is connected to a diversion groove set obliquely downward, and the outlet of the diversion groove is set above the middle of the turntable. 4. A kind of ferroalloy granulation device according to claim 1, is characterized in that, described release agent spraying system comprises nozzle, spray pipe, connecting hose, pump and release agent storage tank; Release agent storage tank; The tank is connected to a pump, a connecting hose, and a nozzle in turn. The nozzle is arranged above the turntable, and a plurality of nozzles are arranged below the nozzle. The release agent is evenly sprayed onto the surface of the turntable by the nozzles. 5. A ferroalloy granulation device according to claim 1, wherein a plurality of connecting holes are arranged on the circumference of the turntable, the turntable is bolted to the outer ring of the slewing bearing through the connecting holes, and the inner ring of the slewing bearing is connected to the support base Fixed connection. 6. A ferroalloy granulation device according to claim 1, wherein the cross section of the chute is semi-elliptical, the inclination angle A between the center line of the chute and the radial direction of the turntable is 6-12°, and the chute is the most The ratio of the width of the narrowest part to the width of the widest part is 1:2-3, the ratio of the depth of the narrowest part of the chute to the depth of the widest part is 1:0.4-0.6, the depth of the narrowest part of the chute and the width of the narrowest part The ratio is 1:2-3. 7 . The iron alloy granulation device according to claim 1 , wherein the particle size of the iron alloy particles formed by the iron alloy granulation device is 0.6-0.7 times the depth of the narrowest part of the chute. 8 .

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