CN112473960A - Crushing equipment and preparation process of alloy powder - Google Patents
Crushing equipment and preparation process of alloy powder Download PDFInfo
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- CN112473960A CN112473960A CN202011347237.9A CN202011347237A CN112473960A CN 112473960 A CN112473960 A CN 112473960A CN 202011347237 A CN202011347237 A CN 202011347237A CN 112473960 A CN112473960 A CN 112473960A
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- 239000000956 alloy Substances 0.000 title claims abstract description 22
- 239000000843 powder Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 110
- 230000005540 biological transmission Effects 0.000 claims abstract description 77
- 238000009826 distribution Methods 0.000 claims abstract description 53
- 239000002245 particle Substances 0.000 claims description 22
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 10
- 229910002796 Si–Al Inorganic materials 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 2
- 229910000702 sendust Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000000498 ball milling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 239000011362 coarse particle Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 iron-silicon-aluminum Chemical compound 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
- B02C19/005—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) the materials to be pulverised being disintegrated by collision of, or friction between, the material particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
- B02C23/22—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating with recirculation of material to crushing or disintegrating zone
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- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention provides crushing equipment which comprises a vertical crusher, an airflow grading mechanism and an induced draft fan, wherein the vertical crusher, the airflow grading mechanism and the induced draft fan are sequentially communicated; the vertical crusher comprises a crusher shell, a crusher upper cover, a fixed support for supporting the crusher shell, an upper transmission system and a lower transmission system; the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the pulverizer, and an upper material distribution turntable is sleeved at one end of the upper transmission main shaft, which extends into the pulverizer shell; the lower transmission system comprises a lower transmission main shaft which is perpendicular to the lower cover of the pulverizer, and one end of the lower transmission main shaft, which extends into the pulverizer shell, is sleeved with a lower material distribution turntable. The two parts of the vertical crusher in the invention have opposite material movement directions, so that the impact strength between the materials can be increased, and the crushing fineness and efficiency can be improved. The invention also provides a preparation process of the alloy powder.
Description
Technical Field
The invention belongs to the technical field of powder preparation, and particularly relates to crushing equipment and a preparation process of alloy powder.
Background
The iron-silicon-aluminum soft magnetic alloy particles with the particle size of 2-10mm are continuously crushed into powder with the particle size of less than 0.1mm, at present, a large roller ball mill, a horizontal ball mill or an improved vertical wet ball mill which is mostly used for crushing ores is adopted, the first two ball mills are used for achieving the purpose of crushing by driving steel balls in a cylinder to move through the rotation of the cylinder, nitrogen can be used as protective atmosphere for ensuring that the powder is not oxidized, but the roller ball mill cannot arrange a cooling jacket outside the cylinder, continuous production can not be easily caused due to overhigh temperature during ball milling crushing, and the ball milling process has the disadvantages of high noise, low production efficiency and high power consumption. The vertical wet ball mill adopts an organic solvent as a ball milling medium, overcomes the defects of the vertical wet ball mill, but consumes the organic solvent to increase the production cost, and causes air pollution after the organic solvent is volatilized in the ball milling process.
Disclosure of Invention
The invention aims to provide crushing equipment and a preparation process of alloy powder.
The invention provides crushing equipment which comprises a vertical crusher, an airflow grading mechanism and an induced draft fan, wherein the vertical crusher, the airflow grading mechanism and the induced draft fan are sequentially communicated;
the vertical crusher comprises a crusher shell, a crusher upper cover, a rack for supporting the crusher shell, an upper transmission system and a lower transmission system; the bottom of the shell of the pulverizer is provided with a conical material receiving barrel, and an outlet of the conical material receiving barrel is communicated with an inlet of the airflow grading mechanism;
the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the crusher, one end of the upper transmission main shaft, which extends into the crusher shell, is sleeved with an upper distribution turntable, and the top of the upper distribution turntable is a conical inclined plane;
the lower transmission system comprises a lower transmission main shaft, a lower material distribution rotary table is sleeved at one end, extending into the shell of the pulverizer, of the lower transmission main shaft, and the top of the lower material distribution rotary table is a conical inclined plane.
Preferably, one end of the upper transmission main shaft extending out of the crusher shell is connected with an upper transmission device and an upper motor;
one end of the lower transmission main shaft, which extends out of the shell of the pulverizer, is connected with a lower transmission device and a lower motor.
Preferably, the upper cover of the pulverizer is provided with a feed inlet, and the feed inlet is communicated with the feeding bin.
Preferably, the bottom of the upper cover of the pulverizer is provided with a wear-resistant lining plate.
Preferably, wear-resistant ribs distributed along the radial direction are arranged on the conical inclined plane at the top of the lower material distribution turntable.
Preferably, the air flow grading structure comprises a separator with a grading impeller and a bag-type dust collector which are communicated in sequence;
the feed opening of separator is connected with spiral material loading machine, spiral material loading machine is used for promoting the back reaction with unqualified granule vertical pulverizer.
The invention provides a preparation process of alloy powder, which comprises the following steps:
A) putting the alloy material into the vertical crusher of the crushing equipment, and reversely rotating the upper material distribution turntable and the lower material distribution turntable to crush the alloy material to obtain a primary crushed material;
B) and the primarily crushed materials enter an airflow grading mechanism for grading, and the materials with unqualified granularity are lifted by a spiral feeding machine and then return to the vertical crusher for crushing again until all the materials meet the granularity requirement.
Preferably, the rotating speed of the upper material distribution turntable is 3000-6000 revolutions/min;
the rotating speed of the lower distribution rotary table is 3000-6000 revolutions per minute.
Preferably, the alloy material is Fe-Si-Al soft magnetic alloy particles;
the grain size of the Fe-Si-Al soft magnetic alloy particles is 2-10 mm.
Preferably, the feeding rate of the alloy material is 5-50 kg/min.
The invention provides crushing equipment which comprises a vertical crusher, an airflow grading mechanism and an induced draft fan, wherein the vertical crusher, the airflow grading mechanism and the induced draft fan are sequentially communicated; the vertical crusher comprises a crusher shell, a crusher upper cover, a fixed support for supporting the crusher shell, an upper transmission system and a lower transmission system; the bottom of the shell of the pulverizer is provided with a conical material receiving barrel, and an outlet of the conical material receiving barrel is communicated with an inlet of the airflow grading mechanism; the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the crusher, one end of the upper transmission main shaft, which extends into the crusher shell, is sleeved with an upper distribution turntable, and the top of the upper distribution turntable is a conical inclined plane; the lower transmission system comprises a lower transmission main shaft which is perpendicular to the lower cover of the pulverizer, one end, extending into the pulverizer shell, of the lower transmission main shaft is sleeved with a lower material distribution turntable, and the top of the lower material distribution turntable is a conical inclined plane. The vertical crusher is provided with the upper material distributing disc and the lower material distributing disc which rotate reversely, materials thrown by the upper material distributing turntable fall along clockwise airflow or anticlockwise airflow, materials thrown by the lower material distributing turntable at a high speed are thrown along the anticlockwise airflow or the clockwise airflow, the moving directions of the materials of the two parts are opposite, the impact strength between the materials can be increased, and the crushing fineness and the crushing efficiency can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the construction of the crushing apparatus according to the present invention;
the device comprises a vertical crusher (a), an air flow grading mechanism (b), an induced draft fan (c), a separator (b1) with a grading impeller, a bag-type dust collector (b2) and a spiral feeding machine (b 3);
FIG. 2 is a schematic view of the vertical crusher of the present invention;
the automatic feeding device comprises a rack (1), an upper transmission device (2), an upper transmission main shaft (3), an upper motor (4), a crusher upper cover (5), a wear-resistant lining plate (6), a feeding hole (7), an upper distribution turntable (8), a crusher shell (9), a lower transmission device (10), a lower motor (11), a lower transmission main shaft (12), a lower distribution turntable (13), a fixed support (14), a feeding hole (15), a conical material receiving barrel (16) and a feeding bin (17);
fig. 3 is a top view of the fixing bracket of the present invention.
Detailed Description
The invention provides crushing equipment which comprises a vertical crusher, an airflow grading mechanism and an induced draft fan, wherein the vertical crusher, the airflow grading mechanism and the induced draft fan are sequentially communicated;
the vertical crusher comprises a crusher shell, a crusher upper cover, a fixed support for supporting the crusher shell, an upper transmission system and a lower transmission system; the bottom of the shell of the pulverizer is provided with a conical material receiving barrel, and an outlet of the conical material receiving barrel is communicated with an inlet of the airflow grading mechanism;
the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the crusher, one end of the upper transmission main shaft, which extends into the crusher shell, is sleeved with an upper distribution turntable, and the top of the upper distribution turntable is a conical inclined plane;
the lower transmission system comprises a lower transmission main shaft which is perpendicular to the lower cover of the pulverizer, one end, extending into the pulverizer shell, of the lower transmission main shaft is sleeved with a lower material distribution turntable, and the top of the lower material distribution turntable is a conical inclined plane.
The communication between the two devices in the invention can be direct communication or indirect communication, that is, a person skilled in the art can add other devices between the two devices in communication according to actual requirements, and the two devices in communication form an indirect communication state.
In the invention, the vertical crusher comprises a crusher shell (9), a crusher upper cover (5), a fixed support (1) for supporting the crusher shell, an upper transmission system and a lower transmission system.
In the invention, a hole is formed in the center of the upper cover of the pulverizer, and the upper transmission main shaft is vertically inserted into the hole, the upper cover of the pulverizer is preferably fixedly connected with the fixed support by using a screw, the upper cover of the pulverizer and the pulverizer shell form a shell inner cavity, one end of the upper transmission main shaft extends into the shell inner cavity, and the other end is sleeved with an upper material distribution turntable; the other end of the upper transmission main shaft extends out of the inner cavity of the shell, and one end of the upper transmission main shaft outside the inner cavity of the shell is connected with an upper transmission device and an upper motor which are used for providing power for the rotation of the upper transmission main shaft.
Preferably, the bottom of the upper cover of the pulverizer is provided with a wear-resistant lining plate for preventing thrown particles from wearing the upper cover, and the upper transmission device, the wear-resistant lining plate and the upper cover of the pulverizer are fastened by using screws.
In the invention, the upper cover of the pulverizer is also provided with a plurality of feed inlets, and the feed inlets are provided with feed bins for feeding materials to be pulverized.
In the invention, the top of the upper distributing turntable is a conical inclined plane.
In the invention, a fixed support is arranged at the bottom of the crusher shell and used for fixing a lower transmission system, the lower transmission system comprises a lower transmission main shaft which is perpendicular to the fixed support, a lower material distribution turntable is sleeved at one end of the lower transmission main shaft which extends into the inner cavity of the shell, and one end of the lower transmission main shaft which extends out of the inner cavity of the shell is connected with a lower transmission device and a lower motor and used for providing rotary power for the lower transmission main shaft.
In the invention, the lower transmission device is fastened with the fixed bracket by using the screw, and the fixed bracket is fastened with the frame by using the screw. The lower material distributing turntable is sleeved on the lower transmission main shaft and is fastened by screws, and the fixed support is provided with a material passing hole.
Preferably, the top of the lower material distribution turntable is a conical inclined plane, and wear-resistant ribs are preferably arranged on the conical inclined plane of the lower material distribution turntable so as to improve centrifugal acting force and crushing effect. The wear-resistant ribs are arranged along the direction of the conical surface generatrix, namely in the radial direction, the number of the wear-resistant ribs is not specially limited, and the wear-resistant ribs can be selected according to the required crushing effect.
In the invention, the bottom of the crusher shell is connected with a conical receiving barrel, crushed materials enter the conical receiving barrel through a material passing hole in the fixed support and are conveyed to the air flow grading mechanism through a bottom outlet of the conical receiving barrel.
The air flow grading mechanism comprises a separator and a bag-type dust collector which are sequentially communicated, wherein the separator is provided with a grading impeller, the bottom of the separator is provided with a feed inlet and is communicated with an outlet at the bottom of the conical receiving barrel, the bottom of the separator is also connected with a spiral feeding machine, and an outlet of the spiral feeding machine is communicated with the feed inlet of the vertical crusher and is used for lifting and conveying unqualified materials back to the vertical crusher for crushing again.
In the invention, the bag-type dust collector is communicated with the induced draft fan, and the induced draft fan is used for providing negative pressure airflow power for the airflow grading mechanism. And the bottom outlet of the bag-type dust collector is a finished product discharge hole.
Based on the crushing equipment, the invention also provides a preparation process of the alloy powder, which comprises the following steps:
A) putting the alloy material into a vertical crusher of the crushing equipment, and reversely rotating an upper material distribution turntable and a lower material distribution turntable to crush the alloy material to obtain a primary crushed material;
B) and the primarily crushed materials enter an airflow grading mechanism for grading, and the materials with unqualified granularity are lifted by a spiral feeding machine and then return to the vertical crusher for crushing again until all the materials meet the granularity requirement.
In the invention, the alloy material is preferably Fe-Si-Al soft magnetic alloy particles, and the particle size of the Fe-Si-Al soft magnetic alloy particles is preferably 2-10 mm.
In the invention, the feeding rate of the alloy material is preferably 5-50 kg/min, and specifically, in the embodiment of the invention, the feeding rate may be 10-20 kg/min, 15-25 kg/min or 20-30 kg/min.
In the invention, the rotating speed of the upper distributing material rotating disc is preferably 3500-6000 revolutions/min, such as 3000-4500 revolutions/min or 5000-5800 revolutions/min;
the rotating speed of the lower distributing rotary disc is preferably 3500-6000 revolutions/min, such as 3000-4500 revolutions/min or 5000-5800 revolutions/min;
the upper material distribution turntable and the lower material distribution turntable in the invention rotate in opposite directions, namely, when the upper material distribution turntable rotates clockwise, the lower material distribution turntable rotates anticlockwise; when the upper distributing turntable rotates anticlockwise, the lower distributing turntable rotates clockwise.
Specifically, the working process of the crushing equipment provided by the invention is as follows:
alloy particle materials (with the particle size of about 2 mm) are fed from a feed inlet of crushing equipment, the feed inlet is positioned above the top surface of an upper distribution turntable, the materials entering from the feed inlet directly fall onto the upper distribution turntable rotating clockwise at 4000-6000 rpm, the top side of the upper distribution turntable is a conical inclined surface, the materials are thrown out by the upper distribution turntable at a high speed in the circumferential direction under the action of centrifugal force, the materials impact on a wear-resistant lining plate and then rebound on a crushing shell, then rebound on the lower distribution turntable, the lower distribution turntable rotates anticlockwise at 4000-6000 rpm, the top side of the lower distribution turntable is a conical inclined surface, the materials are thrown out by the lower turntable at a high speed in the inclined direction under the action of the inclined surface at the top side of the lower distribution turntable (a plurality of radial wear-resistant ribs (13-1) are distributed along the circumferential direction of the inclined surface at the top side of the lower distribution turntable), and the falling materials thrown out by the upper distribution turntable and the lower distribution The materials are crushed into fine powder under the action of impact force, the mutual impact among the materials realizes the crushing to the particle size of less than 0.15mm, the materials thrown by the upper material-distributing turntable fall along a clockwise airflow, the materials thrown by the lower material-distributing turntable at high speed are thrown along an anticlockwise airflow, the moving directions of the materials of the two parts are opposite, the impact strength among the materials can be enhanced, and the crushing fineness and the crushing efficiency are improved.
Under the effect of draught fan, can form the negative pressure air current at the discharge gate of the material barrel is received to the toper, smash the material after smashing in the storehouse and pass the material mouth of crossing on the fixed bolster under the negative pressure air current effect, receive the discharge gate of material barrel from the toper and be the suction by the negative pressure, the material after smashing gets into and carries out the grading in the air current grading mechanism, the material that the granularity is up to standard just directly discharges the material, and the still great material of granularity then returns after spiral feeding machine promotes and carries and smashes the operation once more in the vertical crusher, so circulate, until whole materials reach the granularity requirement.
The discharge port of the conical material receiving cylinder is connected with the airflow grading mechanism, coarse powder with large particle size is blocked by the grading impeller under the action of gravity and then enters the discharge port of the airflow grading mechanism, the coarse powder is lifted by the spiral feeding machine and then returns to the vertical crusher, and fine powder with small particle size enters the finished product discharge port at the rear end of the airflow grading mechanism through the grading impeller to be collected.
The invention provides crushing equipment which comprises a vertical crusher, an airflow grading mechanism and an induced draft fan, wherein the vertical crusher, the airflow grading mechanism and the induced draft fan are sequentially communicated; the vertical crusher comprises a crusher shell, a crusher upper cover, a fixed support for supporting the crusher shell, an upper transmission system and a lower transmission system; the bottom of the shell of the pulverizer is provided with a conical material receiving barrel, and an outlet of the conical material receiving barrel is communicated with an inlet of the airflow grading mechanism; the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the crusher, one end of the upper transmission main shaft, which extends into the crusher shell, is sleeved with an upper distribution turntable, and the top of the upper distribution turntable is a conical inclined plane; the lower transmission system comprises a lower transmission main shaft which is perpendicular to the lower cover of the pulverizer, one end, extending into the pulverizer shell, of the lower transmission main shaft is sleeved with a lower material distribution turntable, and the top of the lower material distribution turntable is a conical inclined plane. The vertical crusher is provided with the upper material distributing disc and the lower material distributing disc which rotate reversely, materials thrown by the upper material distributing turntable fall along clockwise airflow or anticlockwise airflow, materials thrown by the lower material distributing turntable at a high speed are thrown along the anticlockwise airflow or the clockwise airflow, the moving directions of the materials of the two parts are opposite, the impact strength between the materials can be increased, and the crushing fineness and the crushing efficiency can be improved.
In order to further illustrate the present invention, the following detailed description of a pulverizing apparatus and a preparation process of alloy powder provided by the present invention is provided with reference to the following examples, which should not be construed as limiting the scope of the present invention.
The following examples all employ the crushing apparatus of the structure shown in FIGS. 1 to 3.
Example 1:
coarse particles of Fe-Si-Al soft magnetic alloy which are smaller than 10mm are put into a feeding bin (17).
The upper motor (4) and the lower motor (11) are started to lead the upper and lower material-distributing turntables to rotate reversely, and the rotating speed is 3500 and 6000 revolutions per minute.
And opening all the valves of the material inlet and the material outlet, and starting the spiral feeding machine (b3), the air flow grading mechanism and the induced draft fan.
The granular material is fed into the pulverizer from the feed inlet (7) at a flow rate of 10-20 kg/min.
Adjusting the frequency of the air flow grading mechanism to be 20-30Hz, and enabling fine powder with the particle size of less than 0.15mm (100 meshes) to enter a cloth bag collector (3) through a grading impeller of the separator and then enter a finished product discharge hole.
Meanwhile, coarse powder with the particle size larger than 0.15mm is returned to the feed inlet of the pulverizer by a spiral feeding machine for circulating pulverization.
The processing parameters and test data are shown in table 1:
table 1 parameters of the comminution process of example 1
Example 2
Coarse particles of Fe-Si-Al soft magnetic alloy which are smaller than 6mm are put into a feeding bin (17).
The upper motor (4) and the lower motor (11) are started to make the upper and lower material-separating turntables rotate reversely, and the rotating speed is 3000 plus 4500 rpm.
And opening all the valves of the material inlet and the material outlet, and starting the spiral feeding machine (b3), the air flow grading mechanism and the induced draft fan.
The particulate material is fed into the pulverizer at a flow rate of 15-25 kg/min from the feed inlet (7).
Adjusting the frequency of an air flow grading mechanism to 25-40Hz, and allowing fine powder with the particle size of less than 0.10mm (100 meshes) to enter a cloth bag collector (3) through a grading impeller of a separator and then enter a finished product discharge hole.
Meanwhile, coarse powder with the particle size larger than 0.1mm is returned to the feed inlet of the pulverizer by a spiral feeding machine for circulating pulverization.
The processing parameters and test data are shown in table 2:
table 2 parameters of the comminution process of example 2
Example 3
Coarse particles of Fe-Si-Al soft magnetic alloy which are smaller than 2mm are put into a feeding bin (17).
The upper motor (4) and the lower motor (11) are started to make the upper and lower material distributing turntables rotate reversely, and the rotating speed is 5000-.
And opening all the valves of the material inlet and the material outlet, and starting the spiral feeding machine (b3), the air flow grading mechanism and the induced draft fan.
The particulate material is fed into the pulverizer at a flow rate of 20-30 kg/min from the feed inlet (7).
Adjusting the frequency of an air flow grading mechanism to be 30-50Hz, and enabling fine powder with the particle size of less than 0.075mm (100 meshes) to enter a cloth bag collector (3) through a grading impeller of a separator and then enter a finished product discharge hole.
Meanwhile, coarse powder with the particle size larger than 0.075mm is returned to the feed inlet of the pulverizer by the spiral feeding machine for circulating pulverization.
The processing parameters and test data are shown in table 3:
table 3 crushing process parameters of example 3
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A crushing device comprises a vertical crusher, an airflow grading mechanism and an induced draft fan which are communicated in sequence;
the vertical crusher comprises a crusher shell, a crusher upper cover, a rack for supporting the crusher shell, an upper transmission system and a lower transmission system; the bottom of the shell of the pulverizer is provided with a conical material receiving barrel, and an outlet of the conical material receiving barrel is communicated with an inlet of the airflow grading mechanism;
the upper transmission system comprises an upper transmission main shaft which is perpendicular to the upper cover of the crusher, one end of the upper transmission main shaft, which extends into the crusher shell, is sleeved with an upper distribution turntable, and the top of the upper distribution turntable is a conical inclined plane;
the lower transmission system comprises a lower transmission main shaft, a lower material distribution rotary table is sleeved at one end, extending into the shell of the pulverizer, of the lower transmission main shaft, and the top of the lower material distribution rotary table is a conical inclined plane.
2. The comminution apparatus of claim 1 wherein an upper transmission and an upper motor are coupled to an end of the upper drive shaft extending out of the mill housing;
one end of the lower transmission main shaft, which extends out of the shell of the pulverizer, is connected with a lower transmission device and a lower motor.
3. The crushing apparatus according to claim 1, wherein the crusher upper cover is provided with a feed opening, and the feed opening is communicated with the feed bin.
4. The comminution apparatus of claim 1, wherein a bottom portion of the upper shredder cover is provided with a wear liner.
5. The crushing apparatus according to claim 1, wherein the conical inclined surface at the top of the lower material distributing turntable is provided with wear-resistant ribs distributed along the radial direction.
6. The comminution apparatus of claim 1, wherein the gas flow staging structure includes a separator having a staging impeller and a bag-type dust collector in sequential communication;
the feed opening of separator is connected with spiral material loading machine, spiral material loading machine is used for promoting the back reaction with unqualified granule vertical pulverizer.
7. A preparation process of alloy powder comprises the following steps:
A) putting an alloy material into a vertical crusher of crushing equipment according to any one of claims 1 to 6, and reversely rotating an upper material distribution turntable and a lower material distribution turntable to crush the alloy material to obtain a primary crushed material;
B) and the primarily crushed materials enter an airflow grading mechanism for grading, and the materials with unqualified granularity are lifted by a spiral feeding machine and then return to the vertical crusher for crushing again until all the materials meet the granularity requirement.
8. The preparation process according to claim 7, wherein the rotating speed of the upper distributing turntable is 3000-6000 rpm;
the rotating speed of the lower distribution rotary table is 3000-6000 revolutions per minute.
9. The preparation process according to claim 7, wherein the alloy material is sendust soft magnetic alloy particles;
the grain size of the Fe-Si-Al soft magnetic alloy particles is 2-10 mm.
10. The preparation process according to claim 7, wherein the feeding rate of the alloy material is 5 to 50 kg/min.
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| CN202011347237.9A CN112473960A (en) | 2020-11-26 | 2020-11-26 | Crushing equipment and preparation process of alloy powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081374A (en) * | 2007-07-07 | 2007-12-05 | 范顺利 | Micronizing impact grinder and the powder processing system thereof |
| CN201042675Y (en) * | 2007-01-10 | 2008-04-02 | 汪大伟 | Form-separating flour milling machine group |
| JP2015231621A (en) * | 2014-06-10 | 2015-12-24 | ホソカワ ミクロン インターナショナル インコーポレーテッド | Ultrafine airflow classification mill |
| CN207839165U (en) * | 2017-12-18 | 2018-09-11 | 佛山市扬子颜料有限公司 | A kind of particle pulverizing/separating system |
| CN109201299A (en) * | 2018-08-26 | 2019-01-15 | 南京理工大学 | A kind of preparation facilities of special type superfine powder |
| CN214320426U (en) * | 2020-11-26 | 2021-10-01 | 成都慧磁电子材料有限公司 | Crushing equipment |
-
2020
- 2020-11-26 CN CN202011347237.9A patent/CN112473960A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201042675Y (en) * | 2007-01-10 | 2008-04-02 | 汪大伟 | Form-separating flour milling machine group |
| CN101081374A (en) * | 2007-07-07 | 2007-12-05 | 范顺利 | Micronizing impact grinder and the powder processing system thereof |
| JP2015231621A (en) * | 2014-06-10 | 2015-12-24 | ホソカワ ミクロン インターナショナル インコーポレーテッド | Ultrafine airflow classification mill |
| CN207839165U (en) * | 2017-12-18 | 2018-09-11 | 佛山市扬子颜料有限公司 | A kind of particle pulverizing/separating system |
| CN109201299A (en) * | 2018-08-26 | 2019-01-15 | 南京理工大学 | A kind of preparation facilities of special type superfine powder |
| CN214320426U (en) * | 2020-11-26 | 2021-10-01 | 成都慧磁电子材料有限公司 | Crushing equipment |
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