CN112212683A

CN112212683A - Alumina blank calcining equipment

Info

Publication number: CN112212683A
Application number: CN202011203021.5A
Authority: CN
Inventors: 曹恒樑
Original assignee: Jiangsu Heng Xiangyu New Material Co ltd
Current assignee: Jiangsu Heng Xiangyu New Material Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-01-12

Abstract

The invention provides alumina blank calcining equipment which comprises a cylinder, a heating furnace body, a rotary driving device and a material lifting device, wherein the heating furnace body is arranged on the cylinder; the cylinder is positioned in the heating furnace body, and the rotary driving device drives the cylinder to rotate; the material lifting device is used for lifting granular raw blanks in the barrel, and comprises a rotary table, a rotary driving device, a transmission rod, a sliding rod, a guide piece and a material lifting piece, wherein the rotary driving device drives the rotary table to rotate; the transmission rod is eccentrically arranged on the rotary table and is in ball hinge with the rotary table, and the top of the transmission rod is fixedly connected with a sliding rod; the guide piece is arranged in the barrel body along the axial direction of the barrel body, a guide hole is formed in the guide piece, and the slide rod can slide along the guide hole; be equipped with along axially extended breach on the guide, the work end of the material raising piece of rigid coupling on the slide bar runs through behind the breach and contacts with the unburned bricks material, and the axial translation of barrel and the radial swing along the barrel are simultaneously followed to the carousel drive material raising piece, and the unburned bricks material of sediment in the barrel bottom is raised in the raise, has improved and has calcined homogeneity and calcination efficiency.

Description

Alumina blank calcining equipment

Technical Field

The invention belongs to the technical field of refractory material processing, and particularly relates to alumina blank calcining equipment.

Background

The alumina ceramic is a ceramic material taking alumina as a main body, and has better conductivity, mechanical strength and high temperature resistance. During the processing of the alumina ceramic, the raw materials are ground to 400-600 mesh powder, then water is added to the powder and the powder is converted into spherical green particles by a ball forming mill, then the moisture of the green particles is dried, and the green particles are calcined into clinker at high temperature and then are subjected to the working procedures of classification, crushing and the like to prepare the alumina ceramic.

The green particles are calcined in the calcining furnace, a rotary calcining furnace can be selected to improve the heating uniformity of the green blank and hot air, however, the green blank deposited at the bottom of the rotary drum still cannot effectively contact with the hot air, and the calcining uniformity and the calcining efficiency are both required to be improved due to the difference of the temperatures of all parts in the drum.

Disclosure of Invention

The invention aims to provide alumina blank calcining equipment to solve the problems of low calcining uniformity and low calcining efficiency of a rotary calciner for a green blank.

The invention provides the following technical scheme:

an alumina blank calcining device comprises a cylinder, a heating furnace body, a rotary driving device and a material lifting device;

the device comprises a heating furnace, a cylinder, an end cover, a gas outlet valve pipeline, a raw material inlet, a clinker outlet, a gas outlet valve pipeline, a; the rotary driving device is arranged at the front end of the barrel and drives the barrel to rotate by taking the central axis of the barrel as a center;

the material lifting device is used for lifting granular raw blanks in the barrel, and comprises a rotary table, a rotary driving device, a transmission rod, a sliding rod, a guide piece and a material lifting piece, wherein the rotary driving device is in driving connection with the rotary table, and drives the rotary table to rotate; the transmission rod is eccentrically arranged on the rotary table and is in ball hinge joint with the rotary table, and the top of the transmission rod is fixedly connected with the sliding rod; the guide piece is arranged in the barrel along the axial direction of the barrel, a guide hole for guiding the sliding of the slide rod is arranged in the guide piece, and at least one part of the slide rod extends into the guide hole; be equipped with on the guide member along axially extended breach, raise material spare and be located in the barrel and the rigid coupling in on the slide bar, raise material spare with there is the contained angle between the slide bar, the work end of raising material spare runs through contact with the interior unburned bricks material of barrel behind the breach, the drive when the carousel is rotatory raise material spare and follow simultaneously the axial translation of barrel with follow the radial oscillation of barrel to raise and spill the unburned bricks material of deposit in the barrel bottom.

Preferably, the material lifting piece comprises a connecting arm and a shovel fixedly connected to the tail end of the connecting arm, and the shovel is provided with a first shovel edge and a second shovel edge which are respectively convex towards the front side and the rear side.

Preferably, the notch is of a fan-shaped structure, and the virtual central angle of the notch is an acute angle or a right angle.

Preferably, the left end and the right end of the guide piece are respectively and rotatably installed in bearings of the left end cover and the right end cover of the cylinder body.

Preferably, a plurality of material raising pieces are distributed on the sliding rod along the length direction, and the material raising pieces are obliquely arranged along the front and back directions of the sliding rod in a staggered mode.

Preferably, the included angle between the material lifting piece and the sliding rod is 90 degrees.

Preferably, the rotation driving device comprises a first motor, a first driving wheel and a first driven wheel, the first motor is connected with the first driving wheel in a driving manner, the first driving wheel is meshed with the first driven wheel, and the first driven wheel is connected to a transmission shaft on the end cover of the cylinder body in a key manner.

Further, the heating furnace body is internally provided with a supporting roller which supports the cylinder body and has rolling friction with the cylinder body.

Preferably, the cylinder body is obliquely arranged in the heating furnace body, an annular rolling groove is formed in the outer wall of the circumference of the cylinder body, the width of the rolling groove is matched with that of the supporting roller, and the supporting roller extends into the rolling groove and is in rolling friction with the rolling groove.

The invention has the beneficial effects that:

the material lifting device is arranged on the barrel, the rotary driving device of the material lifting device drives the rotary table to rotate, when the rotary table rotates, the eccentric earth hinged transmission rod on the rotary table drives the material lifting piece to simultaneously translate along the axial direction of the barrel and swing along the radial direction of the barrel through the sliding rod, namely, a movable track with a similar elliptical projection is formed in a three-dimensional space, so that raw blanks deposited at the bottom of the barrel are lifted into the air, the contact time and the contact area of the raw blanks and hot air are increased, and the calcining uniformity and the calcining efficiency are improved; meanwhile, the material raising part stirs the raw blank back and forth along the axial direction of the cylinder body, so that the raw blank moves in different temperature areas, the problems that the raw blank at a hot air inlet close to the heating furnace body is excessively calcined and the raw blank at other positions is insufficiently calcined are solved, and the calcination uniformity is further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the internal structure of a state of the material lifting device of the present invention;

fig. 2 is a schematic view of the internal structure of another state of the material lifting device of the present invention;

fig. 3 is a schematic view of the internal structure of the third state of the material lifting device of the present invention;

fig. 4 is a schematic top view of the material lifting device of the present invention;

fig. 5 is a schematic cross-sectional structure of the transmission rod of the material lifting device in a free-hanging state;

fig. 6 is a schematic cross-sectional structure diagram of the material lifting device when the transmission rod swings left and right along with the turntable;

fig. 7 is a schematic sectional structure view of the material raising member of the material raising device.

Labeled as: 1. a barrel; 2. heating the furnace body; 3. a material lifting device; 4. raw blank; 5. an end cap; 6. a vent valve line; 7. a clinker outlet; 8. a green material inlet; 9. a first driven wheel; 10. a turntable; 11. a transmission rod; 12. a slide bar; 13. a guide member; 14. a material raising part; 15. a second motor; 16. a second drive wheel; 17. a second driven wheel; 18. a ball head is hinged; 19. a hinge hole; 20. a guide blind hole; 21. a notch; 22. a connecting arm; 23. a shovel; 24. a first shovel edge; 25. a second shovel edge; 26. a shield; 27. supporting the rollers; 28. and (4) rolling the groove.

Detailed Description

As shown in fig. 1 to 4, an alumina blank calcining apparatus includes a cylinder 1, a heating furnace body 2, a rotation driving device and a material lifting device 3.

The cylinder 1 is arranged in the heating furnace body 2, the heating furnace body 2 is connected with a combustible gas pipeline, and the combustible gas is ignited by a burner so as to form a high-temperature hot air atmosphere in the heating furnace body 2 and calcine the green materials 4 in the cylinder 1. The cavity of the cylinder contains the granular raw blank to be calcined, and the end cover 5 of the cylinder 1 is provided with an exhaust valve pipeline 6 which can intermittently open the exhaust valve to exhaust the expanded part of hot air in the cylinder. The left end cover and the right end cover of the cylinder body 1 are respectively provided with a clinker outlet 7 and a green material inlet 8, and corresponding material ports are opened for feeding and discharging. The rotary driving device is arranged at the front end of the cylinder body 1 and drives the cylinder body 1 to rotate by taking the central axis of the cylinder body 1 as a center; specifically, the rotation driving device comprises a first motor, a first driving wheel (not shown in the figure) and a first driven wheel 9, the first motor is connected with the first driving wheel in a driving mode, the first driving wheel is meshed with the first driven wheel 9, the first driven wheel 9 is connected to a transmission shaft on a cylinder end cover in a key mode, the cylinder 1 is driven to rotate by the first motor, and the rotation speed of the cylinder 1 is controlled to be 3-10 revolutions per minute.

The material lifting device 3 is used for lifting granular raw blanks in the barrel so as to increase the contact time and the contact area of the raw blanks and hot air. The material raising device 3 comprises a rotary disc 10, a rotary driving device, a transmission rod 11, a sliding rod 12, a guide part 13 and a material raising part 14, wherein the rotary disc 10 and the rotary driving device are both positioned outside the heating furnace body 2, the rotary driving device comprises a second motor 15, a second driving wheel 16 and a second driven wheel 17 which are meshed with each other, the second driven wheel 17 is fixedly connected with the rotary disc 10 through the transmission shaft, and the second motor 15 can drive the rotary disc 10 to rotate. The diameter of the tooth root circle of the second driving wheel 16 is smaller than that of the second driven wheel, and the number of teeth of the second driving wheel 16 is greater than that of the second driven wheel, so as to drive the material lifting part 14 to swing at a low frequency.

As shown in fig. 6, the transmission rod 11 is eccentrically installed on the rotary table 10, and a hinge ball 18 is fixedly connected to a tail end of the transmission rod 11, a hinge hole 19 is correspondingly formed in the rotary table 10, the hinge hole 19 is a sphere structure with a portion of the top cut away, the hinge ball 18 is installed in the hinge hole 19, so that the ball hinge between the transmission rod 11 and the rotary table 10 is realized, and the top of the transmission rod 11 is welded on the slide rod 12.

The guide piece 13 is arranged in the cylinder body 1 along the axial direction of the cylinder body 1, a guide blind hole 20 for guiding the sliding of the slide rod 12 is arranged in the guide piece 13, the right end of the slide rod 12 extends into the guide blind hole 20, and the slide rod 12 can slide along the guide blind hole 20; the bottom of guide 13 is equipped with along axially extended breach 21, material lifting 14 is located barrel 1 and its root welds on slide bar 12, there is the contained angle between material lifting 14 and the slide bar 12, this contained angle of preferred is 90, material lifting 14's working end runs through behind the breach 21 and contacts with the interior green compact material 4 of barrel, drive material lifting 14 simultaneously along the axial translation of barrel 1 and along the radial swing of barrel 1 when carousel 10 is rotatory, material lifting 14 removes in the three-dimensional space promptly, form the orthographic projection and be similar oval-shaped movable track, material lifting deposits the green compact material in barrel 1 bottom, and shift green compact material 4 between the different warm areas in barrel 1, improve and calcine the homogeneity.

Specifically, as shown in fig. 4, a plurality of material raising members 14 are distributed on the sliding rod 12 at intervals along the length direction, so as to further improve the material raising efficiency and the calcination uniformity. The material raising parts 14 are obliquely arranged along the front and back directions of the sliding rod 12 in a staggered mode, so that the material mixing effect is further enhanced. As shown in fig. 7, the material lifting member 14 includes a connecting arm 22 and a shovel 23 welded to the rear end of the connecting arm 22, and the shovel 23 has a first shovel edge 24 and a second shovel edge 25 protruding to the front and rear sides, respectively, so that the shovel alternately lifts the raw material forward and backward, that is: when the shovel swings forward, the first shovel edge 24 of the shovel plays a role in shoveling the green blank, when the shovel swings backward, the shoveled green blank is spilled down along the arc-shaped track, and the second shovel edge 25 of the shovel plays a role in shoveling the green blank on the rear side, so that the circular reciprocating motion is realized.

The notch 21 at the bottom of the guide piece 13 is of a fan-shaped structure, so that the connecting arm 22 is allowed to swing back and forth in the notch 21 while sliding left and right along the notch 21, and the stability and continuity of the action of the material lifting device are ensured. Meanwhile, the virtual central angle of the notch 21 should not be too large, and can be selected as an acute angle or a right angle, so that the guide part 13 can provide a reliable supporting function for the lifting part 14. The left and right ends of the guide 13 are rotatably mounted in bearings of the left and right end covers of the cylinder, respectively, so that the guide 13 can rotate after receiving a thrust force, and the notch portion of the guide is prevented from interfering with the swinging motion of the connecting arm 22 due to the swinging thrust force of the connecting arm 22.

As shown in FIG. 5, in order to prevent the material from penetrating into the blind guiding holes 20 from the notches 21 and causing the sliding rods 12 to be blocked from moving, a protective cover 26 is installed on the periphery of the guiding element 13, the protective cover 26 covers the guiding element 13 from the top of the guiding element, the top of the guiding element is a slope surface, the bottom of the protective cover is open, and the raised part of the green material slides down from the slope surface.

A plurality of groups of supporting rollers 27 are arranged in the heating furnace body 2, the supporting rollers 27 support the cylinder body 1, and when the cylinder body 1 rotates, the supporting rollers 27 and the cylinder body 1 are in rolling friction.

The right end of the cylinder 1 is obliquely arranged in the heating furnace body 2 upwards (for convenience of drawing, the oblique angle is not shown in figures 1-3), and the included angle between the cylinder 1 and the horizontal plane is 0.6-2 degrees, so that raw blanks in the cylinder 1 can freely slide to one side of a clinker outlet, and the discharging is convenient. The circumferential outer wall of the cylinder body 1 is provided with an annular rolling groove 28, the width of the rolling groove 28 is matched with that of the supporting roller 27, the supporting roller 27 extends into the rolling groove 28 and is in rolling friction with the rolling groove 28, and the rolling groove 28 limits the cylinder body 1 in the left and right directions.

The working process of the alumina blank calcining equipment comprises the following steps:

opening a cover door of a green material inlet, putting the green material into the barrel body 1, and then closing the cover door; closing the furnace door of the heating furnace body 2, and calcining the green material 4 in the cylinder body 1;

starting a first motor of the rotation driving device to drive the cylinder 1 to rotate slowly, wherein part of the green materials at the bottom of the cylinder 1 rotate along with the cylinder 1 until the green materials rotate to the top of the cylinder 1 and fall freely;

starting a second motor of the material raising device 3, driving the rotary table 10 to rotate, driving the transmission rod 11 to swing by the rotary table 10, driving the material raising part 14 to swing in the left-right direction and the front-back direction by the transmission rod 11 through the slide rod 12, raising and then sprinkling the green blanks deposited together at the bottom of the cylinder, transferring the green blanks among different temperature areas, increasing the contact time and the contact area of the green blanks and hot air, and improving the calcining efficiency and the calcining uniformity;

and after the calcination time is up, closing the material lifting device 3 and the rotary driving device, opening the furnace door, and discharging the clinker from a clinker outlet 7 through the material receiving pipe.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The alumina blank calcining equipment is characterized by comprising a cylinder, a heating furnace body, a rotary driving device and a material lifting device;

the cylinder body is positioned in the heating furnace body, granular raw blanks to be calcined are accommodated in the cylinder body, an end cover of the cylinder body is provided with an exhaust port valve pipeline, and the cylinder body is also provided with a raw blank inlet and a clinker outlet; the rotary driving device is arranged at the front end of the barrel and drives the barrel to rotate by taking the central axis of the barrel as a center;

the material lifting device is used for lifting granular raw blanks in the barrel, the material lifting device comprises a rotary table, a rotary driving device, a transmission rod, a sliding rod, a guide piece and a material lifting piece, the rotary table and the rotary driving device are both positioned outside the heating furnace body, the rotary driving device is in driving connection with the rotary table, and the rotary driving device drives the rotary table to rotate; the transmission rod is eccentrically arranged on the rotary table and is in ball hinge joint with the rotary table, and the top of the transmission rod is fixedly connected with the sliding rod; the guide piece is arranged in the barrel along the axial direction of the barrel, a guide hole for guiding the sliding of the slide rod is arranged in the guide piece, and at least one part of the slide rod extends into the guide hole; be equipped with on the guide member along axially extended breach, raise material spare and be located in the barrel and the rigid coupling in on the slide bar, raise material spare with there is the contained angle between the slide bar, the work end of raising material spare runs through contact with the interior unburned bricks material of barrel behind the breach, the drive when the carousel is rotatory raise material spare and follow simultaneously the axial translation of barrel with follow the radial oscillation of barrel to raise and spill the unburned bricks material of deposit in the barrel bottom.

2. The alumina blank calcining apparatus as claimed in claim 1, wherein the material raising member comprises a connecting arm and a shovel fixedly connected to the tail end of the connecting arm, and the shovel has a first shovel edge and a second shovel edge which respectively protrude to the front side and the rear side.

3. The alumina billet calcining apparatus as claimed in claim 1, wherein the notch has a fan-shaped structure, and the virtual central angle of the notch is an acute angle or a right angle.

4. The alumina ingot calcination apparatus according to claim 1, wherein the guide member has left and right ends rotatably fitted in bearings provided in left and right end caps of the cylindrical body, respectively.

5. The alumina billet calcining apparatus as claimed in claim 1, wherein a plurality of the material lifting members are distributed on the slide bar along the length direction, and the material lifting members are obliquely arranged along the front and back direction of the slide bar in a staggered manner.

6. The alumina billet calcining apparatus as claimed in claim 1, wherein the included angle between the kicker and the sliding bar is 90 °.

7. The alumina blank calcining apparatus as claimed in claim 1, wherein the rotary driving device comprises a first motor, a first driving wheel and a first driven wheel, the first motor is connected with the first driving wheel in a driving way, the first driving wheel is meshed with the first driven wheel, and the first driven wheel is connected with a transmission shaft on the end cover of the barrel body in a key way.

8. The alumina billet calcining apparatus as claimed in claim 1, wherein a support roller is installed in the heating furnace body, and the support roller supports the barrel body and is in rolling friction with the barrel body.

9. The alumina billet calcining apparatus as claimed in claim 9, wherein the barrel is obliquely installed in the heating furnace body, an annular rolling groove is formed on the circumferential outer wall of the barrel, the width of the rolling groove is matched with that of the supporting roller, and the supporting roller extends into the rolling groove and is in rolling friction with the rolling groove.