CN118009703A - Rare earth waste high-temperature accurate calcination equipment - Google Patents
Rare earth waste high-temperature accurate calcination equipment Download PDFInfo
- Publication number
- CN118009703A CN118009703A CN202410410873.3A CN202410410873A CN118009703A CN 118009703 A CN118009703 A CN 118009703A CN 202410410873 A CN202410410873 A CN 202410410873A CN 118009703 A CN118009703 A CN 118009703A
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- Prior art keywords
- rare earth
- earth waste
- kiln
- door
- driving
- Prior art date
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 164
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 162
- 239000002699 waste material Substances 0.000 title claims abstract description 136
- 238000001354 calcination Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 94
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 239000002245 particle Substances 0.000 claims abstract description 37
- 238000012216 screening Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
- F27B9/028—Multi-chamber type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
- F27B9/22—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path on rails, e.g. under the action of scrapers or pushers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids or removable covers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of rare earth calcination equipment, in particular to high-temperature precise calcination equipment for rare earth waste, which comprises the following components: the outer kiln is fixedly connected with the inner kiln through a bracket; the screening device is rotationally connected with the right ends of the outer kiln and the inner kiln, and is used for screening rare earth waste, and adding large-particle rare earth waste and small-particle rare earth waste into the inner kiln and the outer kiln respectively; according to the invention, the outer kiln, the inner kiln, the screening device and the sealing door are arranged, the rare earth is screened by the screening device, the large-particle rare earth and the small-particle rare earth are respectively put into the inner kiln and the outer kiln for classified calcination, and meanwhile, the plurality of adjustable sealing doors are arranged in the inner kiln, so that the large-particle rare earth can stay in different heating cavities for a period of time, the large-particle rare earth waste can be heated in the inner kiln for a sufficient time, and the improvement of the rare earth purity is facilitated.
Description
Technical Field
The invention relates to the field of rare earth calcination equipment, in particular to high-temperature precise calcination equipment for rare earth waste.
Background
Rare earth waste rare earth is a general name of seventeen metal elements of lanthanoid elements, scandium and yttrium in the periodic table, and 250 rare earth ores exist in nature. Rare earth is called as industrial gold, and has excellent physical properties such as light and electromagnetic properties, so that the rare earth can be combined with other materials to form novel materials with various properties and varieties; in reality, rare earth elements in rare earth ores are usually mixed with other impurity elements, and the impurity elements are required to be separated in a fire mode, so that the purity of the rare earth elements is improved.
For example, the patent of the utility model with the application number of CN202021868279.2 discloses a rare earth calcining device, which comprises a kiln body, one end of the kiln body is movably connected with a connecting pipe, the other end of the connecting pipe is fixedly connected with a preheating cavity, the outer side of the preheating cavity is fixedly provided with a heat preservation plate, the middle of the inner part of the preheating cavity is fixedly provided with a grinding plate, the surface of the grinding plate is fixedly provided with a bulge, and the upper part of the bulge is movably provided with a grinding roller.
In the prior art, aiming at rare earth calcining equipment, a rotary kiln is generally adopted for calcining, and in the process of calcining rare earth, because rare earth waste contains particles with different sizes, some rare earth waste with larger volume and smoother surface is easy to quickly separate from the rotary kiln, the calcining time of large-particle rare earth is insufficient and the calcining is uneven, so that the problem of reducing the purity of the rare earth is caused.
Therefore, the invention provides high-temperature precise calcination equipment for rare earth waste to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides high-temperature precise calcination equipment for rare earth waste.
In order to achieve the above purpose, the invention adopts the following technical scheme: a high temperature precision calcination apparatus for rare earth wastes, comprising:
the outer kiln is fixedly connected with the inner kiln through a bracket;
the screening device is rotationally connected with the right ends of the outer kiln and the inner kiln, and is used for screening rare earth waste, and adding large-particle rare earth waste and small-particle rare earth waste into the inner kiln and the outer kiln respectively;
The door frames are connected to the inner wall of the inner kiln in a sliding manner, and are fixedly connected with the screening device through connecting rods;
the two ends of the sealing doors are connected to the side wall of the door frame in a sliding manner so as to divide the inner kiln into a plurality of heating cavities, and an elastic connecting piece is connected between the sealing doors and the door frame;
the pushing assembly sequentially pushes the sealing doors according to the position sequence of the sealing doors;
In the process of pushing the sealing doors at the corresponding positions by the pushing assembly, the sealing doors at the other positions are in a closed state, so that the rare earth waste in the heating cavity at the corresponding position flows into the next heating cavity and stays, and the large-particle rare earth waste can be heated in the inner kiln for a sufficient time;
Specifically, firstly, rare earth waste is screened by a screening device, so that the rare earth waste with large particles enters an inner kiln, the rare earth waste with smaller particles enters an outer kiln, and the rare earth waste with different particle sizes is calcined by the outer kiln and the inner kiln;
After the large-particle rare earth waste enters the inner kiln through the screening device, the rare earth waste moves to the first sealing door, and the rare earth waste is blocked from moving leftwards through the sealing door, so that the rare earth waste stays in a heating cavity at the first position for heating;
Along with the heating, the pushing assembly is started to push the first sealing door first, so that the first sealing door moves leftwards, the sealing effect on the door frame is canceled, the rare earth waste in the first heating cavity flows into the second heating cavity and is blocked by the second sealing door, the rare earth waste stays in the second heating cavity, and the heating effect is continued;
then the pushing action of the pushing mechanism on the first sealing door is canceled, the first sealing door is reset under the action of the elastic connecting piece, the door frame at the first position is sealed again, and the rare earth waste entering subsequently is stopped in the heating cavity at the first position;
After the first sealing door is resealed, the pushing mechanism pushes the second sealing door, and according to the operation, the rare earth waste in the second heating cavity flows into the third heating cavity and is heated in the third heating cavity, so that the rare earth waste with large particles can be heated in the inner kiln for a sufficient time, and the purity of the rare earth is improved.
Preferably, the sealing door includes:
the two sides of the main door are symmetrically and slidingly connected with two auxiliary doors;
The driving assembly is used for driving the two auxiliary doors to approach the main door so as to increase the space between the two sides of the sealing door and the door frame and enable the rare earth waste to rapidly flow into the next heating cavity.
Preferably, the driving assembly includes:
The two driving plates are symmetrically and fixedly connected to the side wall of the door frame, and a driving groove is formed in the top of each driving plate;
One end of the connecting frame is fixedly connected with the side wall of the auxiliary door at the corresponding position, and the other end of the connecting frame is connected in the driving groove in a sliding way through a connecting pin;
in the process of moving the sealing door, the connecting frame slides in the driving groove, and the two auxiliary doors shrink to be close to the main door through the driving of the driving groove, so that the space between the two sides of the sealing door and the door frame is increased, and rare earth waste rapidly flows into the next heating cavity.
Preferably, the method further comprises:
The mounting frames are respectively arranged in the heating cavities at corresponding positions and fixedly connected with the door frames at corresponding positions;
The conveying belts are respectively connected to the mounting frame in a sliding manner through two driving rollers, and a plurality of partition boards are fixedly connected to the surface array of the conveying belts;
The stop block is fixedly connected to the side wall of the main door and is contacted with the partition plate at the left end of the conveying belt;
In the process of flowing the rare earth waste into the next heating cavity, the conveyer belt in the next heating cavity is limited by the baffle plate, so that the conveyer belt cannot rotate, and the flowing down rare earth waste stays on the right of the conveyer belt, so that the rare earth waste entering before and the rare earth waste entering after are separated.
Preferably, the method further comprises:
The two gears are symmetrically arranged on two sides of the right end of the conveying belt and are coaxially fixed with the driving roller at the corresponding position;
the two driving rods are fixedly connected to the side wall of the main door at positions corresponding to the gears, and a plurality of teeth are fixedly connected to the bottom of each driving rod on the right side of each gear;
in the process of moving the sealing door, the rack moves to be close to the gear at the corresponding position, when the rack is meshed with the gear, the conveying belt rotates anticlockwise, and in the process of rotating the conveying belt, the partition plate toggles the rare earth waste in the next heating cavity rightwards along the moving track, so that the rare earth waste is fully contacted with the inner kiln.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, the outer kiln, the inner kiln, the screening device and the sealing door are arranged, the rare earth is screened by the screening device, the large-particle rare earth and the small-particle rare earth are respectively put into the inner kiln and the outer kiln for classified calcination, and meanwhile, the plurality of adjustable sealing doors are arranged in the inner kiln, so that the large-particle rare earth can stay in different heating cavities for a period of time, the large-particle rare earth waste can be heated in the inner kiln for a sufficient time, and the improvement of the rare earth purity is facilitated.
According to the invention, the main door and the two auxiliary doors are arranged, the connecting frame slides along the driving groove in the moving process of the sealing door, and the two auxiliary doors are contracted to be close to the main door by driving of the driving groove, so that the space between the two sides of the sealing door and the door frame is increased, and the rare earth waste can rapidly flow into the next heating cavity.
According to the invention, the conveyer belt, the baffle and the baffle are arranged, and the baffle limits the baffle, so that the conveyer belt cannot rotate, and the flowing down rare earth waste stays on the right side of the conveyer belt in the process of flowing down the rare earth waste into the next heating cavity, so that the last-entering rare earth waste and the newly-entering rare earth waste are divided, and the rare earth waste added in different time periods is prevented from being mixed.
According to the invention, the gear and the rack are arranged, the rack moves close to the gear at the corresponding position in the moving process of the sealing door, when the rack is meshed with the gear, the conveyer belt rotates anticlockwise, and the partition board dials the rare earth waste in the next heating cavity rightwards along the moving track in the rotating process of the conveyer belt, so that the rare earth waste is fully contacted with the inner kiln.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an overall cross-sectional view of the present invention;
FIG. 3 is a view showing the connection of a door frame, a seal door and a conveyor belt according to the present invention;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is an enlarged view of FIG. 3 at B;
FIG. 6 is a connection diagram of the door frame, mounting bracket and conveyor belt of the present invention;
FIG. 7 is a cross-sectional view of a drive plate according to the present invention;
FIG. 8 is a view showing the connection of the sealing door and the stopper in the present invention;
fig. 9 is a connection diagram of a rotating disc, a pushing seat and a pushing block in the present invention.
In the figure: the kiln comprises an outer kiln 1, an inner kiln 2, a door frame 3, a connecting rod 4, a sealing door 5, a main door 501, a secondary door 502, a driving plate 6, a driving groove 7, a connecting frame 8, a connecting pin 801, a heating cavity 9, a first L-shaped charging pipe 10, a second L-shaped charging pipe 11, an annular screen 12, a rotary driving device 13, a spring 14, a pushing rod 15, a pushing block 16, a rotating disc 17, a semi-annular shell 18, a driving motor 19, a mounting frame 20, a conveying belt 21, a partition 22, a stop block 23, a pushing seat 24, a yielding groove 25, a gear 26 and a rack 27.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
As shown in fig. 1 to 9, a high temperature precision calcination apparatus for rare earth wastes includes:
The outer kiln 1 is fixedly connected with the inner kiln 2 through a bracket in the outer kiln 1;
The screening device is rotationally connected with the right ends of the outer kiln 1 and the inner kiln 2, is used for screening rare earth waste, and respectively adds the sizes of large-particle rare earth waste and small-particle rare earth waste into the inner kiln 2 and the outer kiln 1;
the door frames 3 are connected to the inner wall of the inner kiln 2 in an array sliding manner, and the door frames 3 are fixedly connected with the screening device through connecting rods 4;
The two ends of the sealing doors 5 are connected to the side wall of the door frame 3 in a sliding manner so as to divide the inner kiln 2 into a plurality of heating cavities 9, and an elastic connecting piece is connected between the sealing doors 5 and the door frame 3;
the pushing assembly sequentially pushes the sealing doors 5 according to the position sequence of the sealing doors 5;
In the process of pushing the sealing doors 5 at the corresponding positions by the pushing assembly, the sealing doors 5 at the other positions are in a closed state, so that the rare earth waste in the heating cavity 9 at the corresponding positions flows into the next heating cavity 9 and stays, and the large-particle rare earth waste can be heated in the inner kiln 2 for a sufficient time;
Specifically, in the prior art, in the process of calcining rare earth, because rare earth waste contains particles with different sizes, some rare earth waste with larger volume and smoother surface is easy to be separated from a rotary kiln rapidly, so that the rare earth calcination time is insufficient and the calcination is uneven, thereby causing the problem of lower purity of the rare earth;
After the large-particle rare earth waste enters the inner kiln 2 through the screening device, the rare earth waste moves to the first sealing door 5, and the sealing door 5 prevents the rare earth waste from moving leftwards, so that the rare earth waste stays in the heating cavity 9 at the first place for heating;
Along with the heating, the pushing assembly is started to push the first sealing door 5, so that the first sealing door 5 moves leftwards, the sealing effect on the door frame 3 is canceled, the rare earth waste in the first heating cavity 9 flows into the second heating cavity 9 and is blocked by the second sealing door 5, the rare earth waste stays in the second heating cavity 9, and the heating effect is continued;
Then the pushing action of the first sealing door 5 is canceled through the pushing mechanism, the first sealing door 5 is reset under the action of the elastic connecting piece, the door frame 3 at the first position is sealed again, and the rare earth waste entering subsequently is remained in the heating cavity 9 at the first position;
After the first sealing door 5 is resealed, the pushing mechanism pushes the second sealing door 5, and according to the operation, the rare earth waste in the second heating cavity 9 flows into the third heating cavity 9 and is heated in the third heating cavity, so that the rare earth waste with large particles can be heated in the inner kiln 2 for a sufficient time, and the purity of the rare earth is improved.
It should be noted that: the outer kiln 1 and the inner kiln 2 are both inclined with the bottom surface, and the central axes of the outer kiln 1 and the inner kiln 2 are positioned at the same position;
referring to fig. 2, additionally, a first pass sealing door 5 and a first heating chamber 9 are located at the right end of the inner kiln 2.
As an optional embodiment of the screening apparatus, the screening apparatus includes:
The left bottom end of the first L-shaped feeding pipe 10 is rotationally connected with the right end of the outer kiln 1;
The second L-shaped feeding pipe 11, the second L-shaped feeding pipe 11 is positioned in the first L-shaped feeding pipe 10, the left bottom end of the second L-shaped feeding pipe 11 is rotationally connected with the right end of the inner kiln 2, and the top end surface of the second L-shaped feeding pipe 11 is lower than the top end surface of the first L-shaped feeding pipe 10;
the annular screen 12, the inner ring of the annular screen 12 is fixedly connected with the top end of the second L-shaped feeding tube 11, and the outer ring of the annular screen 12 is fixedly connected with the bottom surface of the first L-shaped feeding tube 10, so that the annular screen 12 is in an inclined state;
Specifically, through the annular screen 12, after the rare earth waste falls on the annular screen 12, the rare earth waste with small particles enters the outer kiln 1, and the rare earth waste with large particles enters the inner kiln 2 through the filtration of the annular screen 12, so that the rare earth is classified and calcined according to the different particle sizes, and the purity of the rare earth is improved.
In addition, the right end of the connecting rod 4 is fixedly connected to the right bottom end of the second L-shaped feeding tube 11.
In a specific implementation process, the method further comprises the following steps:
The rotation driving device 13 is used for driving the outer kiln 1 to rotate, and the outer kiln 1 and the inner kiln 2 synchronously rotate in the rotation process of the outer kiln 1 due to the fact that the outer kiln 1 and the inner kiln are fixed through the support.
Referring to fig. 7, as an alternative embodiment of the elastic connection member, the elastic connection member includes:
and the spring 14, and two ends of the spring 14 are fixedly connected to the sealing door 5 and the door frame 3 respectively.
Referring to fig. 9, as an alternative embodiment of the pushing assembly, the pushing assembly includes:
The plurality of pushing rods 15, one ends of the plurality of pushing rods 15 are fixedly connected with the sealing doors 5 at the corresponding positions, and the other ends of the pushing rods 15 are fixedly connected with pushing blocks 16;
The rotary disc 17 is rotatably connected to the right end of the outer kiln 1, and a pushing seat 24 is fixedly connected to the surface of the rotary disc 17 at a position corresponding to the pushing block 16;
The rotary driving mechanism is used for driving the rotary disk 17 to rotate, so that the pushing seat 24 sequentially pushes the pushing block 16 and the pushing rod 15, and the sealing door 5 at the corresponding position moves;
as an alternative embodiment of the rotary drive mechanism, the rotary drive mechanism comprises:
the semi-annular shell 18, the semi-annular shell 18 is fixedly connected in the left bottom end of the second L-shaped feeding pipe 11, and the rotary disk 17 is rotatably connected in the semi-annular shell 18;
the driving motor 19, the driving motor 19 is fixedly connected to the side wall of the semi-ring shell 18, and the output shaft of the driving motor 19 is coaxially fixed with the rotating disc 17;
the pushing seat 24 has a pushing surface and a supporting surface, wherein a plurality of pushing seats 24 are distributed in a staggered manner;
specifically, by starting the driving motor 19, the output shaft of the driving motor 19 rotates, so that the rotating disc 17 rotates, thereby one of the pushing seats 24 contacts with the pushing block 16 at the corresponding position, the pushing block 16 is pushed by the pushing surface of the pushing seat 24, the first sealing door 5 moves under the connection action of the pushing rod 15, the sealing of the first heating cavity 9 is canceled, then the supporting surface of the pushing seat 24 contacts with the pushing block 16, so that the first sealing door 5 has a certain opening time to allow enough time for the rare earth waste in the first heating cavity 9 to flow into the second heating cavity 9;
When the pushing seat 24 is separated from the pushing block 16 at the corresponding position, the sealing door 5 is reset under the action of the spring 14;
Then in the subsequent rotation of the rotating disc 17, the pushing seats 24 at the rest positions sequentially press the pushing blocks 16 according to the operation described above, so that the second sealing door 5 and the third sealing door 5 are opened in sequence;
After the rotating disk 17 rotates 360 degrees, the first pass sealing door 5 is opened again.
Referring to fig. 8, as a further embodiment of the present invention, the sealing door 5 includes:
the main door 501, two sides of the main door 501 are symmetrically and slidingly connected with two auxiliary doors 502;
The driving assembly is used for driving the two auxiliary doors 502 to approach the main door 501 so as to increase the space between the two sides of the sealing door 5 and the door frame 3, and enable the rare earth waste to rapidly flow into the next heating cavity 9;
the drive assembly includes:
the two driving plates 6 are symmetrically and fixedly connected to the side wall of the door frame 3, and a driving groove 7 is formed in the top of each driving plate 6;
the two connecting frames 8, one end of each connecting frame 8 is fixedly connected with the side wall of the corresponding auxiliary door 502, and the other end of each connecting frame 8 is slidably connected in the driving groove 7 through a connecting pin 801;
During the movement of the sealing door 5, the connecting frame 8 slides along the driving groove 7, and the two auxiliary doors 502 are contracted to be close to the main door 501 by the driving of the driving groove 7, so that the space between the two sides of the sealing door 5 and the door frame 3 is increased, and the rare earth waste material rapidly flows into the next heating cavity 9;
Wherein the driving groove 7 has a chute and a straight groove;
specifically, in the process of moving the sealing door 5, the connecting frame 8 moves along the chute, and under the driving of the chute, the two auxiliary doors 502 shrink to be close to the main door 501, so that the space between the two sides of the sealing door 5 and the door frame 3 is increased, the rare earth waste rapidly flows into the next heating cavity 9, and then the connecting frame 8 moves along the straight chute, so that the positions of the two auxiliary doors 502 are limited, and the increased space between the two sides of the sealing door 5 and the door frame 3 is maintained.
Referring to fig. 6, as a further embodiment of the present invention, further comprising:
the mounting frames 20 are respectively arranged in the heating cavities 9 at corresponding positions, and the mounting frames 20 are fixedly connected with the door frames 3 at corresponding positions;
The conveying belts 21 are respectively connected to the mounting frame 20 in a sliding manner through two driving rollers, and a plurality of partition plates 22 are fixedly connected to the surface array of the conveying belts 21;
The stop block 23, the stop block 23 is fixedly connected to the side wall of the main door 501, and the stop block 23 is in contact with the baffle 22 at the left end of the conveyor belt 21;
In the process of flowing the rare earth waste into the next heating cavity 9, the conveyer belt 21 in the next heating cavity 9 is limited by the baffle plate 22 through the baffle plate 23, so that the conveyer belt 21 cannot rotate, and the flowing down rare earth waste stays on the right of the conveyer belt 21, so that the front entering rare earth waste and the rear entering rare earth waste are separated;
Specifically, by arranging the baffle 22 and the baffle 23, the baffle 22 is limited by the baffle 23, so that the conveyor belt 21 cannot rotate, and in the process of flowing down the rare earth waste into the next heating cavity 9, the flowing down rare earth waste stays on the right side of the conveyor belt 21, so that the last-in rare earth waste and the newly-in rare earth waste are divided, and the rare earth waste added in different time periods is prevented from being mixed;
When the sealing door 5 moves to cancel the sealing process of the door frame 3, the stop block 23 is gradually far away from the partition plate 22, the limit to the partition plate 22 is canceled, and the rare earth waste exerts left thrust on the partition plate 22 under the action of gravity, so that the conveying belt 21 rotates, and in the rotating process of the conveying belt 21, the partition plate 22 actively pushes the rare earth waste in the heating cavity 9 to the next heating cavity 9, so that the heated rare earth waste is actively conveyed to the next heating cavity 9.
Referring to fig. 8, as a further embodiment of the present invention, the stopper 23 is an arc-shaped stopper 23;
Specifically, through setting up dog 23 into arc dog 23 for the tombarthite waste material can be to both sides drainage mediation behind dog 23, is favorable to dispersing the tombarthite on the one hand, reduces the piling up of tombarthite waste material, makes the tombarthite waste material fully contact with interior kiln 2 wall, is favorable to promoting the abundant calcination of tombarthite waste material, on the other hand is favorable to reducing and makes the tombarthite fully get rid of from last heating chamber 9, reduces the residual quantity of tombarthite on the sealing door 5.
As a further embodiment of the present invention, the top end of the stopper 23 is provided with a relief groove 25, which leaves a relief space for the conveyor 21, so that the partition 22 is vertically attached to the stopper 23.
As a further embodiment of the present invention, further comprising:
The two gears 26 are symmetrically arranged on the two sides of the right end of the conveying belt 21, and are coaxially fixed with the driving roller at the corresponding position;
The two racks 27 are fixedly connected to the side wall of the main door 501 corresponding to the position of the gear 26, and the left end of each rack 27 is far away from the right side of the gear 26;
During the movement of the sealing door 5, the rack 27 moves to be close to the gear 26 at the corresponding position, when the rack 27 is meshed with the gear 26, the conveyer belt 21 rotates anticlockwise, and during the rotation of the conveyer belt 21, the partition 22 dials the rare earth waste in the next heating cavity 9 to the right along the movement track, so that the rare earth waste is fully contacted with the inner kiln 2;
Referring to fig. 6, the arrow is in a counterclockwise direction, specifically, by arranging the gear 26 and the rack 27, during the moving process of the sealing door 5, the rack 27 moves to be close to the gear 26 at the corresponding position, when the rack 27 is meshed with the gear 26, the conveyer belt 21 rotates counterclockwise, and during the rotating process of the conveyer belt 21, the partition 22 toggles the rare earth waste in the heating cavity 9 to the right along the moving track, so that on one hand, the rare earth waste is fully contacted with the inner kiln 2, and the full calcination of the rare earth waste is facilitated; on the other hand, the right end baffle plate 22 of the conveying belt 21 is close to the heating cavity 9 at the last position, so that the distance between the rare earth waste and the baffle plate 22 is reduced, the gravitational potential energy of the rare earth waste is reduced, and a large amount of spark fragments generated by the impact of the rare earth waste are reduced;
In the process of resetting the sealing door 5, the rack 27 drives the gear 26 to rotate clockwise, and the conveyer belt 21 rotates clockwise, so that the partition plate 22 stirs the rare earth waste to move leftwards, and further, the rare earth waste is fully contacted with the inner kiln 2, thereby being beneficial to promoting the full calcination of the rare earth waste.
The working principle of the invention is as follows: firstly, rare earth waste is screened by a screening device, so that the rare earth waste with large particles enters an inner kiln 2, the rare earth waste with smaller particles enters an outer kiln 1, and the rare earth waste with different particle sizes is calcined by the outer kiln 1 and the inner kiln 2;
After the large-particle rare earth waste enters the inner kiln 2 through the screening device, the rare earth waste moves to the first sealing door 5, and the sealing door 5 prevents the rare earth waste from moving leftwards, so that the rare earth waste stays in the heating cavity 9 at the first place for heating;
Along with the heating, the pushing assembly is started to push the first sealing door 5, so that the first sealing door 5 moves leftwards, the sealing effect on the door frame 3 is canceled, the rare earth waste in the first heating cavity 9 flows into the second heating cavity 9 and is blocked by the second sealing door 5, the rare earth waste stays in the second heating cavity 9, and the heating effect is continued;
Then the pushing action of the first sealing door 5 is canceled through the pushing mechanism, the first sealing door 5 is reset under the action of the elastic connecting piece, the door frame 3 at the first position is sealed again, and the rare earth waste entering subsequently is remained in the heating cavity 9 at the first position;
After the first sealing door 5 is resealed, the pushing mechanism pushes the second sealing door 5, and according to the operation, the rare earth waste in the second heating cavity 9 flows into the third heating cavity 9 and is heated in the third heating cavity, so that the rare earth waste with large particles can be heated in the inner kiln 2 for a sufficient time, and the purity of the rare earth is improved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims.
Claims (10)
1. A high temperature precision calcination apparatus for rare earth waste, comprising:
An outer kiln (1), wherein an inner kiln (2) is fixedly connected in the outer kiln (1) through a bracket;
the screening device is rotationally connected with the right ends of the outer kiln (1) and the inner kiln (2), and is used for screening rare earth waste and adding the sizes of large-particle rare earth waste and small-particle rare earth waste into the inner kiln (2) and the outer kiln (1) respectively;
The door frames (3) are connected to the inner wall of the inner kiln (2) in an array sliding manner, and the door frames (3) are fixedly connected with the screening device through connecting rods (4);
the sealing doors (5) are connected to the side walls of the door frame (3) in a sliding manner at two ends of the sealing doors (5) so as to divide the inner kiln (2) into a plurality of heating cavities (9), and elastic connecting pieces are connected between the sealing doors (5) and the door frame (3);
the pushing assembly sequentially pushes the sealing doors (5) according to the position sequence of the sealing doors (5);
In the process of pushing the sealing door (5) at the corresponding position by the pushing component, the sealing doors (5) at the other positions are in a closed state, so that the rare earth waste in the heating cavity (9) at the corresponding position flows into the next heating cavity (9) and stays, and the large-particle rare earth waste can be heated in the inner kiln (2) for a sufficient time.
2. A rare earth waste high temperature precision calcination apparatus according to claim 1, wherein the sealing door (5) comprises:
the main door (501), two sides of the main door (501) are symmetrically and slidingly connected with two auxiliary doors (502);
The driving assembly is used for driving the two auxiliary doors (502) to approach the main door (501) so as to increase the space between the two sides of the sealing door (5) and the door frame (3) and enable rare earth waste to rapidly flow into the next heating cavity (9).
3. The apparatus for high temperature precision calcination of rare earth waste according to claim 2, wherein the driving assembly comprises:
The two driving plates (6), the two driving plates (6) are symmetrically and fixedly connected to the side wall of the door frame (3), and a driving groove (7) is formed in the top of each driving plate (6);
One end of the connecting frame (8) is fixedly connected with the side wall of the auxiliary door (502) at the corresponding position, and the other end of the connecting frame (8) is slidably connected in the driving groove (7) through a connecting pin (801);
In the process of moving the sealing door (5), the connecting frame (8) slides in the driving groove (7), and the two auxiliary doors (502) are contracted to be close to the main door (501) through the driving of the driving groove (7), so that the space between the two sides of the sealing door (5) and the door frame (3) is increased, and rare earth waste rapidly flows into the next heating cavity (9).
4. A rare earth waste high temperature precision calcination apparatus according to claim 3, further comprising:
The mounting frames (20) are respectively arranged in the heating cavities (9) at corresponding positions, and the mounting frames (20) are fixedly connected with the door frames (3) at the corresponding positions;
The conveying belts (21) are respectively connected to the mounting frame (20) in a sliding manner through two driving rollers, and a plurality of partition plates (22) are fixedly connected to the surface array of the conveying belts (21);
the stop block (23), the said stop block (23) is fixedly connected to sidewall of the said main door (501), the said stop block (23) contacts with baffle (22) at the left end of the said conveyer belt (21);
In the process of the rare earth waste flow to the next heating cavity (9), the conveying belt (21) in the next heating cavity (9) is limited by the baffle plate (22) through the baffle plate (23), so that the conveying belt (21) cannot rotate, and the flowing down rare earth waste stays on the right side of the conveying belt (21) to separate the rare earth waste entering before and the rare earth waste entering after.
5. The high temperature precision calcination apparatus for rare earth waste according to claim 4, further comprising:
The two gears (26) are symmetrically arranged on two sides of the right end of the conveying belt (21), and are coaxially fixed with the driving roller at the corresponding position;
the two racks (27) are fixedly connected to the side wall of the main door (501) at positions corresponding to the gears (26), and the left end of each rack (27) is far away from the right side of each gear (26);
In the process of moving the sealing door (5), the rack (27) moves to be close to the gear (26) at the corresponding position, when the rack (27) is meshed with the gear (26), the conveying belt (21) rotates anticlockwise, and in the process of rotating the conveying belt (21), the partition plate (22) toggles the rare earth waste in the next heating cavity (9) rightwards along the moving track, so that the rare earth waste is fully contacted with the inner kiln (2).
6. The apparatus for high temperature and accurate calcination of rare earth waste according to claim 1, wherein the screening means comprises:
the left bottom end of the first L-shaped feeding pipe (10) is rotationally connected with the right end of the outer kiln (1);
The second L-shaped feeding pipe (11) is positioned in the first L-shaped feeding pipe (10), the left bottom end of the second L-shaped feeding pipe (11) is rotationally connected with the right end of the inner kiln (2), and the top end surface of the second L-shaped feeding pipe (11) is lower than the top end surface of the first L-shaped feeding pipe (10);
The annular screen (12), the inner ring of annular screen (12) is fixedly connected with second L shape filling tube (11) top, the outer loop of annular screen (12) with first L shape filling tube (10) bottom surface fixed connection to make annular screen (12) be the incline state.
7. The apparatus for high temperature precision calcination of rare earth waste according to claim 1, wherein the pushing assembly comprises:
The pushing rods (15), one ends of the pushing rods (15) are fixedly connected with the sealing doors (5) at corresponding positions, and the other ends of the pushing rods (15) are fixedly connected with pushing blocks (16);
the rotary disc (17), the rotary disc (17) is connected to the right end of the outer kiln (1) in a rotary way, and a pushing seat (24) is fixedly connected to the surface of the rotary disc (17) corresponding to the pushing block (16);
the rotary driving mechanism is used for driving the rotary disk (17) to rotate, so that the pushing seat (24) sequentially pushes the pushing block (16) and the pushing rod (15) to enable the sealing door (5) to move at the corresponding position.
8. The high-temperature precise calcination equipment for rare earth wastes according to claim 4, wherein the stopper (23) is an arc-shaped stopper (23).
9. The high-temperature precise calcination equipment for rare earth waste according to claim 4, wherein the top end of the stop block (23) is provided with a yielding groove (25).
10. A rare earth waste high temperature precision calcination apparatus according to claim 3, characterized in that the driving trough (7) has a chute and a straight trough.
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| CN202410410873.3A CN118009703B (en) | 2024-04-08 | 2024-04-08 | Rare earth waste high-temperature accurate calcination equipment |
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| CN202410410873.3A CN118009703B (en) | 2024-04-08 | 2024-04-08 | Rare earth waste high-temperature accurate calcination equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368676A (en) * | 1980-07-16 | 1983-01-18 | Fmc Corporation | Apparatus for collection of gases and particulates in a furnace feed system |
| CN102154557A (en) * | 2011-03-23 | 2011-08-17 | 连云港市兆昱新材料实业有限公司 | Method for recovering rare earth elements from waste neodymium iron boron leftover material |
| CN109579515A (en) * | 2018-11-26 | 2019-04-05 | 太原开元智能装备有限公司 | A kind of external-heat vacuum continuous fritting furnace |
| CN211635304U (en) * | 2019-12-31 | 2020-10-09 | 吉水金诚新材料加工有限公司 | Rare earth waste heating system |
| CN116399120A (en) * | 2023-03-24 | 2023-07-07 | 赣州哥窑工程技术有限公司 | An energy-saving rare earth smelting kiln |
-
2024
- 2024-04-08 CN CN202410410873.3A patent/CN118009703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368676A (en) * | 1980-07-16 | 1983-01-18 | Fmc Corporation | Apparatus for collection of gases and particulates in a furnace feed system |
| CN102154557A (en) * | 2011-03-23 | 2011-08-17 | 连云港市兆昱新材料实业有限公司 | Method for recovering rare earth elements from waste neodymium iron boron leftover material |
| CN109579515A (en) * | 2018-11-26 | 2019-04-05 | 太原开元智能装备有限公司 | A kind of external-heat vacuum continuous fritting furnace |
| CN211635304U (en) * | 2019-12-31 | 2020-10-09 | 吉水金诚新材料加工有限公司 | Rare earth waste heating system |
| CN116399120A (en) * | 2023-03-24 | 2023-07-07 | 赣州哥窑工程技术有限公司 | An energy-saving rare earth smelting kiln |
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| CN118009703B (en) | 2024-05-31 |
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