Raw material air conveying system for aluminum oxide production
Through the design of raw material air delivery system and conical collection barrel, the coarse powder is reflowed to the ball mill by using cyclone and centrifugal force, and the fine powder is separated and transported to the temporary storage tank, which solves the problem of dust spillage in alumina production and realizes the powder The efficient filtration separation and reflow processing improves the operating environment and production efficiency.
Patent Information
- Application Number
- CN202422776775.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-11-14
AI Technical Summary
During the alumina production process, dust spillover at the discharge port of the ball mill affects the health of the operators, and the prior art is difficult to effectively solve the dust problem in the powder screening and lifting process.
The raw material air delivery system for alumina production is adopted. The coarse powder is sent into the raw material storage tank at a high place through cyclone blowing. The raw material with a larger particle size is reflowed into the ball mill by gravity and centrifugal force, and the fine material is passed through a cone shape. The collection barrel and the deflector are separated and transported into the temporary storage tank, and the filtering and separation of the powder is achieved by combining the tube screw conveyor and dust bag.
It effectively reduces dust spillage, realizes filter separation and reflow treatment of powder, and improves the safety and production efficiency of the operating environment.
Smart Images
Figure CN222219866U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of α-alumina production equipment, and specifically to a raw material air delivery system for alumina production. Background Art
[0002] α-alumina, commonly known as corundum, is the most stable phase of all alumina. Its stability is closely related to the crystal structure, which belongs to the trigonal crystal system, in which oxygen ions are approximately close-packed hexagonal stacking, and aluminum atoms fill the octahedral voids. Since the ratio of aluminum atoms to oxygen atoms is 2:3, aluminum atoms do not completely fill all octahedral voids. This special crystal structure gives α-alumina extremely high stability. When producing α-alumina, the raw materials need to be first ground into powder by a ball mill. After the powder is filtered, the qualified fine material is lifted by an elevator to a high raw material temporary storage tank for storage. The powder stored in the tank is discharged-processed with industrial salt and stirred and mixed, washed with water to remove sodium-sodium is washed away with water, screw conveyed-calcined in a kiln, calcined with natural gas-cooled in a cooling kiln, and finally sieved to obtain α-alumina.
[0003] In the prior art, the powder at the discharge port of the ball mill is screened by a vibrating screen and then lifted to a temporary raw material storage tank by a hoist. Therefore, dust will overflow during the raw material screening and lifting process, affecting the health of the operators. Utility Model Content
[0004] The present application provides a raw material air conveying system for alumina production, which can convey the coarse powder discharged from the discharge port of the ball mill into a raw material temporary storage tank at a high place through cyclone blowing. During the process of conveying the coarse powder, raw materials with larger particle sizes can flow back into the ball mill under the combined action of gravity and centrifugal force, and fine materials that meet the requirements can smoothly enter the raw material temporary storage tank, thereby effectively solving the problems in the background technology.
[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a raw material air conveying system for alumina production, comprising a conical collecting barrel and a guide tube; the lower end face of the guide tube is connected to a waste storage box, an air inlet pipe is provided at the lower end of the outer side surface of the guide tube, the air inlet pipe is arranged along the tangent direction of the cross section of the guide tube, and a guide tube four inclined to the right is provided at the upper end of the outer side surface of the air inlet pipe.
[0006] A second guide tube is provided at the upper end of the outer side of the guide tube, and the end of the second guide tube is connected to the feed port of the conical collecting barrel. The feed port of the conical collecting barrel is arranged at the front side of the upper end of its outer side, and the feed port is arranged along the tangent of the cross section of the conical collecting barrel.
[0007] The upper end surface of the conical collecting barrel is connected to a diverter pipe through an air guide hose, the air outlet of the diverter pipe is connected to at least one strip dust bag, the lower end surface of the strip dust bag is connected to a feed pipe one through a guide pipe one, an electric-controlled plug valve is installed on the feed pipe one, the lower end surface of the feed pipe one is connected to a fine material temporary storage box, a discharge pipe one is provided at the lower end of the outer side surface of the fine material temporary storage box, an electric-controlled ball valve is installed on the discharge pipe one, and the lower end surface of the conical collecting barrel is connected to the upper end of the outer side surface of the fine material temporary storage box through an inclined guide pipe six.
[0008] Preferably, the guide tube is connected to a waste temporary storage box via a guide tube 5 arranged on the lower end surface thereof, and a return pipe is installed on the lower end surface of the waste temporary storage box.
[0009] Preferably, the reflux pipe is connected to the feed port of the external ball mill, and an electrically controlled valve 1 is installed on the reflux pipe.
[0010] Preferably, the air inlet pipe and the boost pipe are both connected to the air outlet of the external blower through a conduit.
[0011] Preferably, a boost pipe is provided in the middle of the outer side surface of the guide tube, the boost pipe is arranged to be inclined downward, and the projection of the boost pipe in the horizontal plane is tangent to the cross section of the guide tube.
[0012] Preferably, it also includes a tubular screw conveyor, a raw material box is installed at the feed port of the tubular screw conveyor, the feed end of the raw material box is connected to the powder outlet of the external ball mill, and the discharge port of the tubular screw conveyor is connected to the guide pipe four through the guide pipe three.
[0013] Preferably, a circular filter screen is provided at the upper end of the inner side surface of the conical collecting barrel, and the circular filter screen is arranged above the feed opening of the conical collecting barrel.
[0014] Preferably, there are two conical collecting barrels, wherein the feed port of one conical collecting barrel is connected to the upper end surface of the other conical collecting barrel through a connecting pipe.
[0015] Preferably, a pneumatic telescopic rod is installed on the outer side surface of the guide pipe 1, and the telescopic end of the pneumatic telescopic rod is connected to the diversion pipe.
[0016] Compared with the prior art, the beneficial effects of this application are:
[0017] 1. This raw material air delivery system for alumina production can deliver the coarse powder discharged from the ball mill outlet to a raw material temporary storage tank at a high place through cyclone blowing. During the coarse powder delivery process, the raw materials with larger particle size can flow back into the ball mill under the combined action of gravity and centrifugal force, and the fine materials that meet the requirements can smoothly enter the raw material temporary storage tank, thus achieving the filtration and separation of the raw materials while delivering the powder;
[0018] 2. The guide tube is used to transport the powder to a fine material temporary storage box at a high place. The high-speed airflow generated by the air inlet pipe spirals up along the inner side of the guide tube. The spirally rising airflow pushes the powder to move upward along the guide tube. The airflow carries the powder through the guide tube into the guide tube 2, and finally enters the conical collecting barrel through the guide tube 2 along the tangent direction of the cross-section of the conical collecting barrel. The cross-section of the conical collecting barrel is much larger than that of the guide tube. The fine powder is affected by the combined effect of gravity and centrifugal force inside the conical collecting barrel, gradually falls, and finally enters the fine material temporary storage box. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of this application;
[0020] Figure 2 This is the main view of this application.
[0021] In the figure: 1 discharge pipe 1, 2 electric control ball valve, 3 electric control plug valve, 4 feed pipe 1, 5 guide pipe 1, 6 pneumatic telescopic rod, 7 strip dust bag, 8 diversion pipe, 9 air guide hose, 10 conical collecting bucket, 11 connecting pipe, 12 guide pipe 2, 13 guide tube, 14 booster pipe, 15 raw material box, 16 tubular screw conveyor, 17 guide pipe 3, 18 guide pipe 4, 19 air intake pipe, 20 guide pipe 5, 21 waste temporary storage box, 22 return pipe, 23 guide pipe 6, 24 fine material temporary storage box, 25 circular filter. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0023] In the description of this application, if the orientation description is involved, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the attached Figure 2 The orientation or position relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present application. When a feature is referred to as being "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.
[0024] See also Figure 1-2The present application provides the following technical solutions: a raw material air delivery system for alumina production, comprising a conical collecting barrel 10 and a guide tube 13; the lower end face of the guide tube 13 is connected to a waste storage box 21, an air inlet pipe 19 is provided at the lower end of the outer side face of the guide tube 13, and the air inlet pipe 19 is arranged along the tangent direction of the cross section of the guide tube 13; a guide tube 18 inclined to the right is provided at the upper end of the outer side face of the air inlet pipe 19.
[0025] Specifically, the guide tube 13 is used to transport the powder to a fine material temporary storage box 24 at a high position. The high-speed airflow generated by the air inlet pipe 19 spirals up along the inner side of the guide tube 13 , and the spirally rising airflow pushes the powder to move upward along the guide tube 13 .
[0026] A guide tube 12 is provided at the upper end of the outer side of the guide tube 13, and the end of the guide tube 12 is connected to the feed port of the conical collecting barrel 10. The feed port of the conical collecting barrel 10 is arranged at the front side of the upper end of its outer side, and the feed port is arranged along the tangent of the cross section of the conical collecting barrel 10.
[0027] Specifically, the airflow carries the powder through the guide tube 13 into the guide pipe 12, and finally enters the conical collecting barrel 10 through the guide pipe 12 along the tangent direction of the cross section of the conical collecting barrel 10. The cross section of the conical collecting barrel 10 is much larger than the cross section of the guide tube 13. The powder gradually falls inside the conical collecting barrel 10 under the combined action of gravity and centrifugal force.
[0028] The upper end surface of the conical collecting barrel 10 is connected to the diverter pipe 8 through the air guide hose 9, the air outlet of the diverter pipe 8 is connected to at least one strip dust bag 7, the lower end surface of the strip dust bag 7 is connected to the feed pipe 4 through the guide pipe 5, the feed pipe 4 is installed with an electric control gate valve 3, the lower end surface of the feed pipe 4 is connected to the fine material temporary storage box 24, the lower end of the outer side surface of the fine material temporary storage box 24 is provided with a discharge pipe 1, the discharge pipe 1 is installed with an electric control ball valve 2, the lower end surface of the conical collecting barrel 10 is connected to the upper end of the outer side surface of the fine material temporary storage box 24 through an inclined guide pipe 6 23.
[0029] Specifically, the gas discharged through the conical collecting barrel 10 carries a small amount of powder and enters the strip dust bag 7 through the air guide hose 9 and the diversion pipe 8. The gas overflows through the strip dust bag 7, and the powder carried by the gas is filtered by the strip dust bag 7 and remains inside it. The powder inside the strip dust bag 7 is discharged at a fixed point into the fine material temporary storage box 24.
[0030] Furthermore, the guide tube 13 is connected to a waste temporary storage box 21 via a guide tube 5 20 arranged on the lower end surface thereof, and a return pipe 22 is installed on the lower end surface of the waste temporary storage box 21.
[0031] Specifically, the waste temporary storage box 21 is used to store raw materials with larger particle sizes, and these raw materials are finally returned to the ball mill through the screw conveyor for further crushing and processing.
[0032] Furthermore, the reflux pipe 22 is connected to the feed port of the external ball mill, and an electric-controlled valve 1 is installed on the reflux pipe 22.
[0033] Specifically, when the waste temporary storage box 21 is discharged, the electric control valve 1 is opened, and the coarse materials inside the waste temporary storage box 21 can enter the external ball mill through the reflux pipe 22.
[0034] Furthermore, the air inlet pipe 19 and the boost pipe 14 are both connected to the air outlet of the external blower through a conduit.
[0035] Specifically, the airflow generated by the boost pipe 14 can accelerate the airflow inside the guide tube 13 to enter the interior of the conical collecting barrel 10 .
[0036] Furthermore, a boost pipe 14 is provided in the middle of the outer side surface of the guide tube 13 . The boost pipe 14 is tilted downward, and the projection of the boost pipe 14 in the horizontal plane is tangent to the cross section of the guide tube 13 .
[0037] Specifically, the wind sent into the guide tube 13 by the boost pipe 14 can rise in a spiral along the inner side of the guide tube 13 .
[0038] Furthermore, it also includes a tubular screw conveyor 16, a raw material box 15 is installed at the feed port of the tubular screw conveyor 16, the feed end of the raw material box 15 is connected to the powder outlet of the external ball mill, and the discharge port of the tubular screw conveyor 16 is connected to the guide pipe four 18 through the guide pipe three 17.
[0039] Specifically, the tubular screw conveyor 16 is used to deliver the powder discharged from the ball mill into the guide pipe 4 18.
[0040] Furthermore, a circular filter screen 25 is provided at the upper end of the inner side surface of the conical collecting barrel 10 , and the circular filter screen 25 is arranged above the feed port of the conical collecting barrel 10 .
[0041] Specifically, the circular filter screen 25 can effectively reduce the spillage of dust inside the conical collection barrel 10 .
[0042] Furthermore, there are two conical collecting barrels 10 , wherein the feed port of one conical collecting barrel 10 is connected to the upper end surface of the other conical collecting barrel 10 through a connecting pipe 11 .
[0043] Specifically, the two conical collecting barrels 10 can effectively separate air from solid particles through two filtration separations.
[0044] Furthermore, a pneumatic telescopic rod 6 is installed on the outer side of the guide tube 5, and the telescopic end of the pneumatic telescopic rod 6 is connected to the diversion tube 8.
[0045] Specifically, when the dust in the strip dust bag 7 needs to be cleaned, the pneumatic telescopic rod 6 drives the dust bag 7 to vibrate by moving up and down, and the powder inside can be quickly discharged into the fine material temporary storage box 24.
[0046] When in use: the coarse powder discharged from the ball mill outlet enters the guide pipe 18 through the tubular screw conveyor 16, and the high-speed airflow generated by the blower pushes the coarse powder into the guide tube 13 through the air inlet pipe 19. The airflow carries the powder and spirals upward inside the guide tube 13. The powder with larger particle size falls into the waste temporary storage box 21 under the action of gravity and centrifugal force.
[0047] The air carries the fine material into the conical collecting barrel 10. Since the cross-section of the conical collecting barrel 10 is much larger than the cross-section of the guide tube 13, the powder entering the conical collecting barrel 10 gradually enters the guide tube 6 23 under the action of gravity and centrifugal force, and finally enters the fine material temporary storage box 24 through the guide tube 6 23.
[0048] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A raw material air delivery system for alumina production, characterized in that: It comprises a conical collecting barrel (10) and a guide tube (13); the lower end surface of the guide tube (13) is connected to a waste storage box (21); an air inlet pipe (19) is provided at the lower end of the outer side surface of the guide tube (13); the air inlet pipe (19) is arranged along the tangent direction of the cross section of the guide tube (13); a guide tube 4 (18) is arranged inclined to the right at the upper end of the outer side surface of the air inlet pipe (19); A second flow guide tube (12) is provided at the upper end of the outer surface of the flow guide tube (13), and the end of the second flow guide tube (12) is connected to the feed port of the conical collecting barrel (10). The feed port of the conical collecting barrel (10) is arranged at the front side of the upper end of the outer surface thereof, and the feed port is arranged along a tangent line of the cross section of the conical collecting barrel (10); The upper end surface of the conical collecting barrel (10) is connected to a shunt pipe (8) via an air guide hose (9), the air outlet of the shunt pipe (8) is connected to at least one strip dust bag (7), the lower end surface of the strip dust bag (7) is connected to a feed pipe (4) via a guide pipe (5), the feed pipe (4) is provided with an electric control gate valve (3), the lower end surface of the feed pipe (4) is connected to a fine material temporary storage box (24), the lower end of the outer side surface of the fine material temporary storage box (24) is provided with a discharge pipe (1), the discharge pipe (1) is provided with an electric control ball valve (2), and the lower end surface of the conical collecting barrel (10) is connected to the upper end of the outer side surface of the fine material temporary storage box (24) via an inclined guide pipe (23).
2. The raw material air delivery system for aluminum oxide production according to claim 1, characterized in that: The guide tube (13) is connected to a waste temporary storage box (21) via a guide tube 5 (20) arranged on the lower end surface thereof, and a return pipe (22) is installed on the lower end surface of the waste temporary storage box (21).
3. The raw material air conveying system for aluminum oxide production according to claim 2, characterized in that: The reflux pipe (22) is connected to the feed port of the external ball mill, and an electric control valve 1 is installed on the reflux pipe (22).
4. The raw material air delivery system for aluminum oxide production according to claim 1, characterized in that: A boost pipe (14) is provided in the middle of the outer side surface of the guide tube (13). The boost pipe (14) is arranged to be inclined downward, and the projection of the boost pipe (14) in the horizontal plane is tangent to the cross section of the guide tube (13).
5. The raw material air delivery system for aluminum oxide production according to claim 4, characterized in that: The boost pipe (14) and the air inlet pipe (19) are both connected to the air outlet of an external blower via a conduit.
6. The raw material air conveying system for aluminum oxide production according to claim 1, characterized in that: It also includes a tubular screw conveyor (16), a raw material box (15) is installed at the feed port of the tubular screw conveyor (16), the feed end of the raw material box (15) is connected to the powder outlet of the external ball mill, and the discharge port of the tubular screw conveyor (16) is connected to the guide pipe four (18) through the guide pipe three (17).
7. The raw material air conveying system for aluminum oxide production according to claim 1, characterized in that: A circular filter screen (25) is provided at the upper end of the inner side surface of the conical collecting barrel (10), and the circular filter screen (25) is arranged above the feed opening of the conical collecting barrel (10).
8. A raw material air delivery system for aluminum oxide production according to claim 7, characterized in that: There are two conical collecting barrels (10), wherein the feed port of one conical collecting barrel (10) is connected to the upper end surface of another conical collecting barrel (10) via a connecting pipe (11).
9. A raw material pneumatic conveying system for aluminum oxide production according to any one of claims 1 to 8, characterized in that: A pneumatic telescopic rod (6) is installed on the outer side surface of the guide pipe 1 (5), and the telescopic end of the pneumatic telescopic rod (6) is connected to the diversion pipe (8).