Energy-saving aluminum ore calcining equipment

Abstract

The utility model discloses energy-saving aluminum ore calcining equipment, and relates to the technical field of calcining equipment, the energy-saving aluminum ore calcining equipment comprises a gas collector, a rotary kiln, a discharge bin and a preheater, the preheater comprises a shell and a plurality of partition plates; a feed port and an exhaust port are formed in the top of the shell, and the exhaust port is connected with an inlet of the gas collector through an exhaust pipeline; a discharge port is formed in the bottom of the shell and is connected with an inlet of the discharge bin; an air inlet is formed in the bottom of the shell and connected with the rotary kiln through an air inlet pipeline. The multiple partition plates are connected to the two opposite inner walls of the shell in a crossed mode, and the two opposite sides of the partition plates abut against the other two inner walls of the shell. According to the energy-saving aluminum ore calcining equipment, after high-temperature gas generated in the calcining process of the rotary kiln is introduced into the preheater, the high-temperature gas can circulate in the shell in a snakelike path, the circulating path of the high-temperature gas in the preheater is prolonged, the high-temperature gas makes full contact with uncalcined materials, and therefore the preheating time of the uncalcined materials is prolonged, and the energy-saving effect is achieved. The preheating effect is improved.

Description

Technical Field

[0001] This application relates to the field of calcination equipment technology, and in particular to an energy-saving aluminum ore calcination equipment. Background Technology

[0002] Alumina ore, also known as bauxite or bauxite, has an exceptionally complex composition and is a general term for hydrous alumina ores from various geological sources. To broaden the applications of aluminum ore, it needs to be calcined to produce powdered, lumpy, or granular clinker. The equipment used in the calcination process is a rotary kiln. The flame nozzle of the rotary kiln is typically located at the kiln head, from which flames are emitted to calcine the aluminum ore. During the calcination process, the rotary kiln generates a large amount of high-temperature gas. This gas is usually drawn into a preheater to exchange heat with the uncalcined material, thus preheating it and raising its temperature. When the preheated uncalcined material enters the rotary kiln for calcination, the calcination time is shortened, achieving energy savings.

[0003] However, in the existing technology, after the high-temperature gas generated in the rotary kiln is pumped into the preheater, the gas has a short flow path and a short contact time with the uncalcined material, resulting in poor heat exchange between the high-temperature gas and the uncalcined material. Therefore, the effect of saving resources is not obvious. Utility Model Content

[0004] Therefore, the technical problem to be solved by this application is to improve the situation in the prior art where the flow path of high temperature gas in the preheater is relatively short, resulting in poor heat exchange effect on uncalcined materials.

[0005] To solve the above-mentioned technical problems, this application provides an energy-saving aluminum ore calcination equipment, comprising:

[0006] frame;

[0007] Gas collector;

[0008] A rotary kiln, which is connected to the frame;

[0009] A discharge hopper, the outlet of which is connected to the rotary kiln;

[0010] The preheater includes a shell and multiple baffles; the shell is connected to the frame; the top of the shell has a feed inlet and an exhaust outlet, the exhaust outlet being connected to the inlet of the gas collector via an exhaust pipe; the bottom of the shell has a discharge outlet, which is connected to the inlet of the discharge hopper; the bottom of the shell also has an air inlet, which is connected to the rotary kiln via an air inlet pipe; the multiple baffles are cross-connected to two opposite inner walls of the shell, and the opposite sides of the baffles abut against the other two inner walls of the shell.

[0011] Preferably, one end of the partition is connected to the inner wall of the housing, and the other end of the partition extends downward at an angle.

[0012] Preferably, the preheater further includes:

[0013] A drive cylinder, the fixed end of which is connected to the bottom of the housing;

[0014] A connecting rod, one end of which is connected to the movable end of the drive cylinder, and the other end of which extends into the housing and passes through the multiple partitions.

[0015] Preferably, the connecting rod has multiple sets of pressing components arranged from top to bottom, and each set of pressing components includes:

[0016] Two pressing plates are fixedly connected to the body of the connecting rod, and the two pressing plates are symmetrically arranged on opposite sides of the partition.

[0017] Two movable plates, each movable plate having a first through hole, the diameter of which is larger than the diameter of the connecting rod, the connecting rod passing through both first through holes, the movable plates being located on the side of the pressing plate facing the partition;

[0018] Multiple springs, one end of which is connected to the pressing plate and the other end of which is connected to the movable plate, are used to press the movable plate against the partition.

[0019] Preferably, the inner wall of the housing is provided with a plurality of anti-collision protrusions, and the connection position of each anti-collision protrusion corresponds to the extension position of each partition.

[0020] Preferably, it further includes a separation component, the separation component comprising:

[0021] A screen is provided, and a separation hole is provided on the side wall of the discharge bin; the screen is connected to the separation hole.

[0022] A collection bin is connected to the discharge bin and is located at the separation hole.

[0023] Preferably, it also includes a gate, which is installed at the discharge port of the housing.

[0024] Preferably, it also includes a one-way valve, which is installed at the air inlet of the housing.

[0025] Preferably, it also includes a sealing ring, which is installed at the connection between the connecting rod and the housing.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] This application discloses an energy-saving aluminum ore calcination equipment, comprising a frame, a gas collector, a rotary kiln, a discharge hopper, and a preheater. The outlet of the discharge hopper is connected to the rotary kiln, and the discharge port on the shell of the preheater is connected to the inlet of the discharge hopper. The shell is connected to the rotary kiln via an air inlet pipe and to the gas collector via an exhaust pipe. Both the preheater and the rotary kiln are mounted on the frame, forming a complete calcination equipment for preheating, calcination, and gas recovery. By setting multiple baffles on the two opposing inner walls of the preheater shell, with the opposing sides of the baffles abutting against the other two inner walls of the shell, when the high-temperature gas generated by the rotary kiln during calcination is introduced into the preheater through the air inlet pipe, the high-temperature gas can circulate in a serpentine path within the shell, extending the path of the high-temperature gas within the preheater and ensuring sufficient contact with the uncalcined material, thereby extending the preheating time for the uncalcined material and improving the preheating effect. Attached Figure Description

[0028] To make the content of this application easier to understand, the following detailed description is provided based on specific embodiments and accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of a preferred embodiment of the present application;

[0030] Figure 2 This is a cross-sectional view of the preheater, discharge hopper, and separation assembly in an embodiment of this application;

[0031] Figure 3 yes Figure 2 A magnified view of a portion at point A shown.

[0032] Explanation of reference numerals in the accompanying drawings: 1. Frame; 2. Gas collector; 3. Rotary kiln; 4. Discharge bin; 5. Preheater; 501. Shell; 502. Baffle plate; 503. Feed inlet; 504. Exhaust port; 505. Exhaust pipe; 506. Discharge port; 507. Air inlet; 508. Air inlet pipe; 509. Drive cylinder; 510. Connecting rod; 511. Pressing assembly; 5111. Pressing plate; 5112. Movable plate; 5113. Spring; 6. Anti-collision protrusion; 7. Separation assembly; 701. Screen; 702. Collection bin; 8. Gate; 9. Check valve. Detailed Implementation

[0033] The present application will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present application, but the embodiments are not intended to limit the present application.

[0034] Reference Figures 1 to 3 As shown, this application discloses an energy-saving aluminum ore calcination equipment, comprising:

[0035] Rack 1;

[0036] Gas collector 2;

[0037] Rotary kiln 3 is connected to frame 1;

[0038] Discharge bin 4, the outlet of discharge bin 4 is connected to rotary kiln 3;

[0039] The preheater 5 includes a shell 501 and multiple baffles 502; the shell 501 is connected to the frame 1; the top of the shell 501 has a feed inlet 503 and an exhaust outlet 504, the exhaust outlet 504 is connected to the inlet of the gas collector 2 through an exhaust pipe 505; the bottom of the shell 501 has a discharge outlet 506, which is connected to the inlet of the discharge bin 4; the bottom of the shell 501 also has an air inlet 507, which is connected to the rotary kiln 3 through an air inlet pipe 508; multiple baffles 502 are cross-connected on two opposite inner walls of the shell 501, and the opposite sides of the baffles 502 abut against the other two inner walls of the shell 501.

[0040] Specifically, in this embodiment, the preferred shape of the housing 501 is a cuboid, and the preferred shape of the partition 502 is a rectangle.

[0041] This application comprises a frame 1, a gas collector 2, a rotary kiln 3, a discharge hopper 4, and a preheater 5. The outlet of the discharge hopper 4 is connected to the rotary kiln 3. The discharge port 506 on the shell 501 of the preheater 5 is connected to the inlet of the discharge hopper 4. The shell 501 is connected to the rotary kiln 3 via an air inlet pipe 508 and to the gas collector 2 via an exhaust pipe 505. Both the preheater 5 and the rotary kiln 3 are mounted on the frame 1, forming a complete calcination equipment for preheating, calcination, and gas recovery. By setting multiple baffles 502 on the two opposing inner walls of the shell 501 of the preheater 5, and with the two opposing sides of the baffles 502 abutting against the other two inner walls of the shell 501, when the high-temperature gas generated by the rotary kiln 3 during calcination is introduced into the preheater 5 through the air inlet pipe, the high-temperature gas can flow in the shell 501 in a serpentine path, which prolongs the path of the high-temperature gas in the preheater 5 and allows it to fully contact the uncalcined material, thereby prolonging the preheating time of the uncalcined material and improving the preheating effect.

[0042] In this embodiment, preferably, one end of the partition 502 is connected to the inner wall of the housing 501, and the other end of the partition 502 extends downward at an angle.

[0043] Specifically, in this embodiment, the partition 502 near the top of the housing 501 is located directly below the feed inlet 503 of the housing 501, and the other end of the partition 502 near the bottom of the housing 501 is opposite to the discharge outlet 506 of the housing 501.

[0044] By tilting multiple baffles 502, the uncalcined material can smoothly slide down to the bottom of the shell 501 along the multiple baffles 502 when it enters the shell 501 from the feed port 503. After the preheating treatment is completed, the uncalcined material in the shell 501 can smoothly fall into the discharge bin 4 through the discharge port 506, thus avoiding any uncalcined material being left in the shell 501.

[0045] In this embodiment, preferably, the preheater 5 further includes:

[0046] Drive cylinder 509, the fixed end of drive cylinder 509 is connected to the bottom of housing 501;

[0047] Connecting rod 510, one end of which is connected to the movable end of drive cylinder 509, and the other end of connecting rod 510 extends into housing 501 and passes through multiple partitions 502.

[0048] Specifically, in this application, one end of the partition 502 is hinged to the inner wall of the housing 501.

[0049] By setting up a drive cylinder 509 and a connecting rod 510, the movable end of the drive cylinder 509 is connected to one end of the connecting rod 510, and the other end of the connecting rod 510 passes through multiple partitions 502. The movable end of the drive cylinder 509 can move intermittently, causing the connecting rod 510 to drive the multiple partitions 502 to move up and down inside the housing 501, thereby achieving the purpose of intermittently agitating the uncalcined material inside the housing 501. Agitating the uncalcined material not only allows the high-temperature gas to fully contact the uncalcined material, but also allows the uncalcined material to be discharged more smoothly from the discharge port 506 when feeding into the rotary kiln 3.

[0050] During continuous production, the opening of the discharge hopper 4 can easily lead to situations where the uncalcined material fails to achieve the desired preheating effect. By installing a drive cylinder 509, which can extend and retract according to the temperature inside the housing 501, the inclination of multiple baffles 502 within the housing 501 can be adjusted. This controls the feeding speed of the uncalcined material and its residence time within the housing, thereby improving the preheating effect. When the uncalcined material fails to achieve the desired preheating effect, the movable end of the drive cylinder 509 extends, and the connecting rod 510 drives the multiple baffles 502 upwards, causing the baffles 502 to move within the housing... The inclination within shell 501 decreases, resulting in a slower feeding speed of the uncalcined material and a longer residence time within the shell. This allows the high-temperature gas to fully contact the uncalcined material, improving the preheating effect. When the uncalcined material can continuously achieve the preheating effect, the movable end of the drive cylinder 509 retracts, and the connecting rod 510 drives multiple partitions 502 downwards, increasing the inclination of the partitions 502 within shell 501. This results in a faster feeding speed of the uncalcined material and a shorter residence time within the shell. This ensures the preheating effect while shortening the preheating time and increasing the feeding rate of the uncalcined material.

[0051] In this embodiment, preferably, the link 510 has multiple sets of pressing components 511 arranged from top to bottom, and each set of pressing components 511 includes:

[0052] Two pressing plates 5111 are fixedly connected to the rod body of the connecting rod 510. The two pressing plates 5111 are symmetrically arranged on opposite sides of the partition 502.

[0053] Two movable plates 5112 are provided, each with a first through hole. The diameter of the first through hole is larger than the diameter of the connecting rod 510. The connecting rod 510 passes through both first through holes. The movable plates 5112 are located on the side of the pressing plate 5111 facing the partition plate 502.

[0054] Multiple springs 5113 are provided. One end of each spring 5113 is connected to a pressing plate 5111, and the other end of each spring 5113 is connected to a movable plate 5112. The springs 5113 are used to press the movable plate 5112 against the partition 502.

[0055] Specifically, in this embodiment, the number of pressing components 511 is the same as the number of partitions 502. In order to enable the multiple partitions 502 to move smoothly on the connecting rod 510, a second through hole is provided on each of the multiple partitions 502, and the diameter of the second through hole is larger than the diameter of the connecting rod 510.

[0056] By configuring a pressing plate 5111, a movable plate 5112, and a spring 5113, when the movable end of the drive cylinder 509 extends or retracts, both the pressing plate 5111 and the movable plate 5112 on the connecting rod 510 move upward or downward. Since the diameter of the first through hole on the movable plate 5112 is larger than the diameter of the movable end, the movable plate 5112 can move on the connecting rod 510. Therefore, when the movable end of the drive cylinder 509 extends, the connecting rod 510 moves upward, and the pressing plate 5111 located below each partition 502 is controlled by the spring 5113. The function of 113 is to completely abut the movable plate 5112 against the partition 502. When the movable end of the drive cylinder 509 retracts, the connecting rod 510 moves downward. The pressing plate 5111 located above each partition 502 can completely abut the movable plate 5112 against the partition 502 through the action of the spring 5113, thereby completing the adjustment of the tilt angle of the partition 502 within the housing 501. Under the action of the spring 5113, the movable plate 5112 can completely abut against the partition 502, so that the partition 502 is subjected to uniform force during the angle adjustment process.

[0057] In this embodiment, preferably, a plurality of anti-collision protrusions 6 are provided on the inner wall of the housing 501, and the connection position of each anti-collision protrusion 6 corresponds to the extension position of each partition 502.

[0058] Specifically, in this embodiment, the number of anti-collision protrusions 6 is the same as the number of partitions 502; the shape of each anti-collision protrusion 6 is not limited in this application, but it is best to adopt an arc shape or a shape with an inclined surface. In this embodiment, the shape of the anti-collision protrusion 6 is an arc shape.

[0059] By providing multiple anti-collision protrusions 6 on the inner wall of the housing 501, the uncalcined material can be prevented from impacting the inner wall of the housing 501 when it falls. When the uncalcined material impacts the anti-collision protrusions 6, the inclined surface allows the uncalcined material to fall smoothly onto the next partition 502, thus preventing the accumulation of uncalcined material.

[0060] In this embodiment, preferably, it further includes a separation component 7, which includes:

[0061] Screen 701, the side wall of the discharge bin 4 is provided with a separation hole, and screen 701 is connected to the separation hole;

[0062] Collection bin 702 is connected to discharge bin 4 and is located at the separation hole.

[0063] During the feeding process of uncalcined materials, the uncalcined materials are prone to collisions inside the shell 501. Debris attached to the surface of the uncalcined materials will fall off under the impact. If these debris enters the rotary kiln 3 along with the uncalcined materials, it will easily affect the calcination effect of the materials. Therefore, by setting a screen 701 and a collection bin 702 on the side wall of the discharge bin 4 during the feeding process of uncalcined materials, the debris that falls off due to collisions can be collected, reducing the impact on the calcination effect of the materials.

[0064] In this embodiment, preferably, a gate 8 is also included, which is installed at the discharge port 506 of the housing 501.

[0065] By setting a gate 8 at the discharge port 506, the opening size of the gate 8 can be determined according to the preheating treatment and the progress of the calcination treatment, so as to control the feeding speed of the uncalcined material.

[0066] In this embodiment, preferably, a one-way valve 9 is also included, which is installed at the air inlet 507 of the housing 501.

[0067] By installing a one-way valve 9 at the air inlet 507, the high-temperature gas in the rotary kiln 3 can be smoothly introduced into the shell 501 through the air inlet pipe 508, and the uncalcined material in the shell 501 can be prevented from falling into the air inlet pipe 508 through the air inlet 507.

[0068] In this embodiment, preferably, a sealing ring is also included, which is installed at the connection between the connecting rod 510 and the housing 501.

[0069] By setting a sealing ring at the connection between the connecting rod 510 and the housing 501, the sealing effect inside the housing 501 can be improved, and the leakage of high-temperature gas inside the housing 501 can be reduced.

[0070] The implementation principle of this application embodiment is as follows: Uncalcined material continuously enters the interior of the shell 501 through the feed port 503, and slides down along multiple downwardly inclined and intersecting baffles 502 inside the shell 501 to the position of the discharge port 506. Then, it enters the rotary kiln 3 through the gate 8 and the discharge bin 4 for calcination. During the calcination process, the high-temperature gas generated in the rotary kiln 3 can enter the shell 501 through the air inlet pipe 508 and the one-way valve 9. When the high-temperature gas moves along the multiple baffles 502 in a serpentine path, it preheats the uncalcined material. Finally, it enters the gas collector 2 through the exhaust port 504 and the exhaust pipe 505 to complete the recovery of the gas after heat exchange. During the preheating process, the movable end of the drive cylinder 509 intermittently extends and retracts, causing the connecting rod 510 to drive the multiple baffles 502 to move up and down intermittently, so as to move the uncalcined material in the shell 501. This not only allows the high-temperature gas to fully contact the uncalcined material, but also allows the uncalcined material to be discharged smoothly, so as to complete the preheating process of the uncalcined material.

[0071] In summary, this application, by arranging multiple baffles 502 at an angle and cross within the housing 501, allows the high-temperature gas to travel in a serpentine path within the housing 501, extending the path of the high-temperature gas within the housing 501. This, in turn, prolongs the contact time between the high-temperature gas and the uncalcined material, improving the preheating effect on the uncalcined material. Furthermore, by incorporating a drive cylinder 509 and a connecting rod 510, the drive cylinder 509 intermittently extends and retracts, causing the connecting rod 510 to move the multiple baffles 502 up and down within the housing 501. This effectively moves the uncalcined material, preventing blockage within the housing 501 and ensuring sufficient contact between the high-temperature gas and the uncalcined material, further enhancing the preheating effect on the uncalcined material.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An energy-saving aluminum ore calcination equipment, characterized in that, include: Rack (1); Gas collector (2); Rotary kiln (3), which is connected to the frame (1); The outlet of the discharge bin (4) is connected to the rotary kiln (3); The preheater (5) includes a shell (501) and multiple partitions (502); the shell (501) is connected to the frame (1); the top of the shell (501) is provided with a feed inlet (503) and an exhaust outlet (504), and the exhaust outlet (504) is connected to the inlet of the gas collector (2) through an exhaust pipe (505); the bottom of the shell (501) is provided with a discharge outlet (506), and the discharge outlet (506) is connected to the inlet of the discharge hopper (4); the bottom of the shell (501) is also provided with an air inlet (507), and the air inlet (507) is connected to the rotary kiln (3) through an air inlet pipe (508); multiple partitions (502) are cross-connected on two opposite inner walls of the shell (501), and the opposite sides of the partitions (502) abut against the other two inner walls of the shell (501).

2. The energy-saving aluminum ore calcination equipment according to claim 1, characterized in that: One end of the partition (502) is connected to the inner wall of the housing (501), and the other end of the partition (502) extends downward at an angle.

3. The energy-saving aluminum ore calcination equipment according to claim 1, characterized in that: The preheater (5) also includes: A drive cylinder (509) is provided, the fixed end of which is connected to the bottom of the housing (501); A connecting rod (510) is provided, one end of which is connected to the movable end of the drive cylinder (509), and the other end of which extends into the housing (501) and through a plurality of the partitions (502).

4. The energy-saving aluminum ore calcination equipment according to claim 3, characterized in that: The connecting rod (510) has multiple sets of pressing components (511) arranged from top to bottom on its shaft, and each set of pressing components (511) includes: Two pressing plates (5111) are fixedly connected to the rod body of the connecting rod (510), and the two pressing plates (5111) are symmetrically arranged on opposite sides of the partition (502); Two movable plates (5112) are provided, each movable plate (5112) having a first through hole. The diameter of the first through hole is larger than the diameter of the connecting rod (510). The connecting rod (510) passes through both first through holes. The movable plate (5112) is located on the side of the pressing plate (5111) facing the partition (502). Multiple springs (5113) are provided, one end of which is connected to the pressing plate (5111) and the other end of which is connected to the movable plate (5112). The springs (5113) are used to press the movable plate (5112) against the partition plate (502).

5. The energy-saving aluminum ore calcination equipment according to claim 2, characterized in that: Multiple anti-collision protrusions (6) are provided on the inner wall of the housing (501), and the connection position of each anti-collision protrusion (6) corresponds to the extension position of each partition (502).

6. The energy-saving aluminum ore calcination equipment according to claim 1, characterized in that: It also includes a separation component (7), which comprises: The screen (701) is connected to the separation hole on the side wall of the discharge bin (4). Collection bin (702) is connected to discharge bin (4) and is located at the separation hole.

7. The energy-saving aluminum ore calcination equipment according to claim 1, characterized in that: It also includes a gate (8), which is installed at the discharge port (506) of the housing (501).

8. The energy-saving aluminum ore calcination equipment according to claim 1, characterized in that: It also includes a one-way valve (9) installed at the air inlet (507) of the housing (501).

9. The energy-saving aluminum ore calcination equipment according to claim 3, characterized in that: It also includes a sealing ring, which is installed at the connection between the connecting rod (510) and the housing (501).

Images