Pelletizing disc of combined scraper and control method

Abstract

The invention discloses a pelletizing disc with combined scrapers and a control method, the pelletizing disc comprises a base, a rotatable disc arranged on the base and a driving structure used for driving the disc to rotate, a scraper structure used for cleaning sticky materials is arranged corresponding to the disc, and the scraper structure comprises a scraper fixing frame. A movable scraper capable of moving in a lifting and reciprocating manner and a fixed scraper structure fixed on the scraper fixing frame are arranged on the scraper fixing frame; the fixed scraper structure comprises a fixed disc center scraper and a fixed edge scraper. According to the pelletizing disc with the combined scraper and the control method, the design is reasonable, the combined scraper avoids the defects of a fixed scraper and a movable scraper at the same time, the friction force between the scraper and a backing material bed is reduced, the service life of the scraper is prolonged, the failure rate of the scraper is reduced, the operation stability of the pelletizing disc is improved, the pelletizing rate of the pelletizing disc is improved, and the yield and quality of a pellet mineral production line are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sintering pellets, in particular to a pelletizing disk of a combined scraper and a control method thereof. Background Art

[0002] The pelletizing disc is one of the key equipment in the pelletizing production line. The fine-particle iron ore concentrate mixture with a proportion of more than 80% of -200 mesh is wetted by water in the pelletizing disc and rolled into green balls through mechanical force and capillary force. The formation of green balls in the disc pelletizing machine can be divided into three stages: (1) mother ball formation stage; (2) mother ball growth stage; (3) green ball compaction stage. The material forms a regular movement in the disc pelletizing machine, so that larger particles and smaller particles run along their own different trajectories, so they can be classified according to particle size.

[0003] Under the action of adhesive and water, the surface of the bottom material bed of the pelletizing disk is very easy to adhere to the mixture, and the thickness of the bottom material bed increases. Therefore, the pelletizing disk needs to be equipped with a scraper system to clean the sticky material on the bottom material bed of the disk in time, keep the thickness of the bottom material bed of the pelletizing disk at about 35mm, and level the bottom material bed of the disk to ensure the stability of the load of the pelletizing disk, and make the larger particles and smaller particles run along their own different trajectories, so as to improve the output and quality of the pelletizing disk. At present, there are rotating movable scrapers and fixed scrapers for pelletizing disks. The two types of scrapers have their own advantages and disadvantages. The rotating scraper has the problems of frequent transmission mechanism failure, easy wear of the scraper head and easy fall off due to the continuous operation of multiple transmission mechanisms. The fixed scraper has the problems of easy wear of the scraper, frequent shutdown to replace the scraper, and high current overload operation of the pelletizing disk caused by the large friction between the fixed scraper and the bottom material bed. The above problems lead to uneven bottom material bed of the pelletizing disk, large thickness fluctuation, poor operation stability of the pelletizing disk, and increased difficulty in maintenance of the pelletizing disk, which have a great impact on the output and quality of the pelletizing ore production line.

[0004] For example, patent CN117265257A discloses a new type of ball making machine with a movable scraper, which includes a ball making disk, a slewing bearing for installing the ball making disk, a scraper frame arranged on the ball making disk, and a scraper. A first motor is arranged on the mounting seat, a connecting seat is fixedly arranged on the mounting seat, a connecting groove is provided on the connecting seat, a mounting rod is coaxially fixedly connected to the rotating shaft of the first motor, the mounting rod is located in the connecting groove, a sliding block is movably arranged in the connecting groove, a sliding hole is provided on the sliding block, the mounting rod is threadedly connected in the sliding hole, a connecting rod is fixedly arranged on the sliding block, the scraper is cylindrical, and the scraper is coaxially fixed on the connecting rod; this structure is a movable movable scraper structure.

[0005] Another example is a ball-forming disk scraper disclosed in patent CN219772207U, which relates to the field of metallurgical equipment. It includes a scraper frame, a scraper head base, a ceramic block, and a steel plate. One end of the scraper frame is bolted to the other end of the scraper head base. The other end of the scraper head base is provided with a ceramic block and a steel plate, and the steel plate is arranged above the ceramic block. This structure is a fixed scraper structure. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a combined scraper ball-forming disk and a control method to achieve the purpose of stable and reliable operation of the scraper with fewer faults.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A combined scraper ball-forming disk comprises a base, a rotatable disk arranged on the base, and a driving structure for driving the disk to rotate; a scraper structure for cleaning sticky materials is arranged corresponding to the disk; the scraper structure comprises a scraper fixing frame, on which a movable scraper capable of lifting and reciprocating movement and a fixed scraper structure fixed on the scraper fixing frame are arranged.

[0009] The back of the disc is hingedly connected to the top of the base, a central axis is arranged on the back of the disc, and an inclination angle adjusting screw rod connected to the central axis is hingedly connected on the base.

[0010] The fixed scraper structure comprises a fixed disc center scraper and a fixed side scraper.

[0011] The scraper fixing frame is a frame structure with an open bottom.

[0012] The scraper fixing frame is provided with a transverse movable slide rail and a transverse sliding block arranged on the transverse movable slide rail, the transverse sliding block is provided with a lifting structure that can move perpendicular to the direction of the disc, the lifting structure is provided with a scraper fixing plate, and the scraper fixing plate is provided with a group of scrapers.

[0013] The fixed disc center scraper is arranged corresponding to the disc center, and the fixed side scraper is arranged corresponding to the 12 o'clock area of ​​the ball-making disc surface.

[0014] The transverse moving slide rail is arranged across the center of the disc.

[0015] The fixed disc center scraper is set at an inclination angle of 40-45 degrees, and the bottom edge of the scraper is 34-36 mm away from the bottom material bed.

[0016] The fixed edge scraper comprises a blade fixing plate and a group of blades arranged on the blade fixing plate, wherein the group of blades is in a "7"-shaped structure.

[0017] A control method for a pelletizing disk of a combined scraper comprises the following steps:

[0018] S1. The operator starts the ball-making disk, and the disk surface starts to rotate under the drive of the transmission system. The multi-blade reciprocating scraper drives the motor to make left and right reciprocating motion;

[0019] S2. Start the feeding belt of the pelletizing disk, and the iron ore concentrate mixture enters the pelletizing disk. The mixture begins to roll into balls in the disk through mechanical force and capillary force. At the same time, part of the iron ore concentrate mixture in the pelletizing disk is bonded to the surface of the bottom material bed of the pelletizing disk under the action of adhesive and water, and the thickness of the bottom material bed gradually increases.

[0020] S3, the multi-head reciprocating scraper moves back and forth along the scraper fixing frame above the pelletizing disk. The scraper head installed on it cleans the sticky material on the bottom material bed of the pelletizing disk during the movement, and keeps the thickness of the main area of ​​the bottom material bed constant;

[0021] S4. During the rotation of the disc, the sticky material on the surface of the bottom material bed at the center of the disc is cleaned by a fixed scraper at the center of the disc to keep the thickness of the bottom material bed at the center of the disc constant;

[0022] S5. During the rotation of the disc, the sticky material on the edge of the ball-making disc is cleaned by a fixed edge scraper to prevent the sticky material on the edge of the ball-making disc from thickening.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The pelletizing disk and control method of the combined scraper are reasonably designed. The combined scraper avoids the disadvantages of fixed scrapers and movable scrapers, reduces the friction between the scraper and the bottom material bed, extends the life of the scraper, reduces the failure rate of the scraper, improves the operation stability of the pelletizing disk, improves the ball formation rate of the pelletizing disk, and improves the output and quality of the pelletizing ore production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents and symbols in the drawings of this specification:

[0026] Figure 1 It is a side view of the pelletizing disk of the present invention.

[0027] Figure 2 It is a schematic diagram of the arrangement of the movable scraper of the present invention.

[0028] Figure 3 This is a schematic diagram of the fixed scraper arrangement of the present invention.

[0029] Figure 4 It is a schematic diagram of the main structure of the fixed disc center scraper of the present invention.

[0030] Figure 5 It is a schematic diagram of the fixed disc center scraper head assembly of the present invention.

[0031] In the figure:

[0032] 1-scraper fixing frame; 2-scraper structure; 3-disc; 4-bevel gear; 5-reducer; 6-center shaft; 7-tilt adjustment screw; 8-motor; 9-base; 10-scraper lateral movement motor; 11-scraper longitudinal movement motor; 12-multi-blade head reciprocating movable scraper; 13-fixed disc center scraper; 14-fixed side scraper. DETAILED DESCRIPTION

[0033] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0034] like Figures 1 to 5 As shown, the ball-forming disk of the combined scraper includes a base 9, a rotatable disc 3 arranged on the base, and a driving structure for driving the disc to rotate, and a scraper structure 2 for cleaning sticky materials is arranged corresponding to the disc; the scraper structure includes a scraper fixing frame 1, on which a movable scraper that can be lifted and reciprocated is arranged, and a fixed scraper structure fixed on the scraper fixing frame; the fixed scraper structure includes a fixed disc center scraper 13 and a fixed side scraper 14.

[0035] The back of the disc is hingedly connected to the top of the base. A central axis 6 is provided on the back of the disc. An inclination screw 7 connected to the central axis is hingedly connected to the base to adjust the position of the disc. The scraper fixing frame is a frame structure with an open bottom; Figure 2 As shown, there is no direct connection between the scraper fixing frame and the disc. The scraper fixing frame 1 is installed above the disc 3 and is directly connected to the base. The disc 3 can rotate under the scraper fixing frame 1 to form balls.

[0036] The scraper fixing frame is provided with a transverse movable slide rail and a transverse sliding block arranged on the transverse movable slide rail, the transverse sliding block is provided with a lifting structure which can move perpendicular to the direction of the disc, the lifting structure is provided with a scraper fixing plate, and the scraper fixing plate is provided with a group of scrapers; the transverse movable slide rail is arranged across the center of the disc.

[0037] The fixed disc center scraper is set corresponding to the disc center, and the fixed side scraper is set corresponding to the 12 o'clock area of ​​the ball-making disc surface; the fixed disc center scraper is set at an inclination angle of 40-45 degrees, and the bottom edge of the scraper is 34-36mm away from the bottom material bed; the fixed side scraper includes a blade fixing plate and a group of blades arranged on the blade fixing plate, and the group of blades is in a "7" shape.

[0038] The pelletizing disk structure of the combined scraper of the present invention is reasonably designed. The combined scraper avoids the disadvantages of fixed scrapers and movable scrapers, reduces the friction between the scraper and the bottom material bed, prolongs the life of the scraper, reduces the failure rate of the scraper, improves the operation stability of the pelletizing disk, improves the pelletizing rate of the pelletizing disk, and improves the output and quality of the pelletizing ore production line.

[0039] Specifically:

[0040] Aiming at the problems of frequent failure of the transmission mechanism of the movable scraper of the ball-making disk, friction between the fixed scraper and the bottom material bed, and easy wear of the scraper, this patent proposes a ball-making disk with a combined scraper and a control method. The system consists of a ball-making disk, a scraper fixing frame, a movable scraper with multiple blades that can be raised and lowered and reciprocated, a fixed disc center scraper, and a fixed side scraper. The control method of the combined scraper of the ball-making disk is that when the ball-making disk is rotating and making balls, the scraper fixing frame of the ball-making disk has both a movable scraper with multiple blades that can be raised and lowered and reciprocated and a fixed scraper. The main function of the multi-head liftable reciprocating scraper is to clean the sticky material in the main area of ​​the bottom material bed of the pelletizing disk. The main function of the fixed disc center scraper is to clean the sticky material on the bottom material bed in the center of the pelletizing disk. The fixed side scraper cleans the sticky material on the edge of the pelletizing disk. The combined scraper avoids the shortcomings of fixed scrapers and movable scrapers, reduces the friction between the scraper and the bottom material bed, extends the life of the scraper, reduces the failure rate of the scraper, improves the operating stability of the pelletizing disk, improves the ball formation rate of the pelletizing disk, and improves the output and quality of the pelletizing mineral production line.

[0041] Preferred embodiments of the present invention are:

[0042] The ball-making disk of the combined scraper comprises a ball-making disk, a scraper fixing frame 1, a multi-blade lifting reciprocating movable scraper 12, a fixed disc center scraper 13, and a fixed side scraper 14; the ball-making disk is mainly composed of a disc 3, a large bevel gear 4, a small bevel gear, a main shaft, an inclination angle adjustment mechanism, a reducer 5, an electric motor 8, a V-belt and a base, etc. The scraper fixing frame is used to fix the frame of the ball-making disk scraper, which crosses the center of the disc so that the ball-making scraper is located in a designated area on the disc surface of the ball-making disk, and the multi-blade lifting reciprocating movable scraper is installed on the scraper fixing frame, and the multi-blade lifting reciprocating movable scraper is equipped with a lateral moving The motor 10 and a longitudinal moving motor 11, the transverse moving motor makes the reciprocating scraper do reciprocating motion along the moving track of the scraper fixing frame, the longitudinal moving motor can make the reciprocating scraper move in the vertical direction, and the thickness of the bottom material bed can be adjusted by adjusting the longitudinal moving motor. The fixed disc center scraper is installed on the scraper fixing frame and is located in the center area of ​​the disc. The fixed side scraper is located in the 12 o'clock area of ​​the ball making disc. The multi-blade head can lift the reciprocating scraper, the fixed disc center scraper, and the fixed side scraper are 35mm away from the bottom material bed of the ball making disc, ensuring that the thickness of the bottom material bed of the ball making disc is 35mm.

[0043] A method for controlling a pelletizing disk of a combined scraper comprises the following steps:

[0044] (1) The operator starts the ball-making disk, and the disk surface starts to rotate under the drive of the transmission system (large bevel gear, small bevel gear, main shaft, tilt angle adjustment mechanism, reducer, motor, V-belt), and the multi-head lifting reciprocating scraper moves back and forth under the drive of the motor;

[0045] (2) Start the feeding belt of the pelletizing disk, and the iron ore concentrate mixture enters the pelletizing disk. The mixture begins to roll into balls in the disk through mechanical force and capillary force. At the same time, part of the iron ore concentrate mixture in the pelletizing disk is bonded to the surface of the bottom material bed of the pelletizing disk under the action of adhesive and water, and the thickness of the bottom material bed gradually increases;

[0046] (3) The multi-head reciprocating scraper moves back and forth along the scraper fixing frame above the pelletizing disk. The scraper head installed on it cleans the sticky material on the bottom material bed of the pelletizing disk during the movement, and the thickness of the main area of ​​the bottom material bed is maintained at 35mm;

[0047] (4) During the rotation of the disc, the sticky material on the surface of the bottom material bed in the center of the disc is cleaned by a fixed scraper in the center of the disc, and the thickness of the bottom material bed in the center of the disc is maintained at 35 mm;

[0048] (5) During the rotation of the disc, the sticky material on the edge of the ball-making disc is cleaned by a fixed edge scraper to prevent the sticky material on the edge of the ball-making disc from thickening and ensure the internal volume ratio of the ball-making disc.

[0049] The multi-blade head liftable reciprocating movable scraper is provided with a reciprocating reversible moving motor and an up-and-down moving motor. The two motors can make the movable scraper move horizontally and vertically respectively. The reciprocating reversible moving motor can make the movable scraper do left and right reciprocating motion along the scraper fixing frame above the ball making disk. During the ball making process, the multi-blade head liftable reciprocating movable scraper does left and right reciprocating motion along the scraper fixing frame above the ball making disk surface, so as to keep the thickness of the main area of ​​the bottom material bed at 35mm; the up-and-down moving motor can make the movable scraper do vertical motion. When the movable scraper head is gradually worn, the thickness of the main area of ​​the bottom material bed will increase, the load of the ball making disk will increase, the content volume ratio of the ball making disk will decrease, and the failure rate of the ball making disk, the quality of raw balls and the output will decrease. At this time, it is necessary to take advantage of the opportunity of shutdown maintenance to start the up-and-down moving motor set by the multi-blade head liftable reciprocating movable scraper, adjust the distance from the movable scraper head to the surface of the bottom material bed of the ball making disk, and ensure that the thickness of the main area of ​​the bottom material bed is maintained at 35mm.

[0050] The fixed disc center scraper is installed on the central area of ​​the scraper fixing frame. The fixed scraper is mainly composed of a scraper rod, a blade fixing plate, a ceramic blade and a polymer wear-resistant lining. The fixed disc center scraper is required to pass through the center of the pelletizing disk to avoid material accumulation in the center of the disk. The top of the lower part coincides with the center point of the disk. The fixed disc center scraper has an inclination angle of 42 degrees, and the bottom edge of the scraper is 35mm away from the bottom material bed.

[0051] The main structure of the fixed side scraper is the same as that of the fixed disc center scraper, with the following differences: 1) The fixed side scraper is located at the 12 o'clock position on the pelletizing disk surface to clean the sticky material on the edge of the pelletizing disk to prevent the sticky material on the edge of the pelletizing disk from thickening and ensure the volume ratio of the pelletizing disk. The fixed disc center scraper is located at the center of the pelletizing disk surface. The fixed disc center scraper keeps the thickness of the main area of ​​the bottom material bed at 35mm; 2) The lower edge of the side scraper is designed to be in the shape of "7" (with one less blade), allowing part of the material to enter the first quadrant of the pelletizing disk, reducing the empty disk area, increasing the bonding area between the small balls and the powder, and reducing the weight of the pelletizing disk.

[0052] The scraper fixing frame of the pelletizing disk of the present invention has a movable scraper with multiple blade heads that can be raised and lowered and reciprocated and a fixed scraper. The movable scraper with multiple blade heads that can be raised and lowered and reciprocated scrapers scrapes the main area of ​​the flat bottom material bed of the pelletizing disk, the fixed disc center scraper scrapes the center bottom material bed of the pelletizing disk flat, and the fixed side scraper cleans the sticky material on the edge of the pelletizing disk. The combined scraper avoids the disadvantages of the fixed scraper and the movable scraper, reduces the friction between the scraper and the bottom material bed, prolongs the service life of the scraper, reduces the failure rate of the scraper, improves the operating stability of the pelletizing disk, improves the ball formation rate of the pelletizing disk, and improves the output and quality of the pelletizing mineral production line.

[0053] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0054] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A combined scraper ball-forming disk, comprising a base, a rotatable disc arranged on the base, and a driving structure for driving the disc to rotate, and a scraper structure for cleaning sticky materials is arranged corresponding to the disc, characterized in that: The scraper structure comprises a scraper fixing frame, on which a movable scraper capable of lifting and reciprocating movement and a fixed scraper structure fixed on the scraper fixing frame are arranged.

2. The pelletizing disk of the combined scraper as claimed in claim 1, characterized in that: The back of the disc is hingedly connected to the top of the base, a central axis is arranged on the back of the disc, and an inclination angle adjusting screw rod connected to the central axis is hingedly connected on the base.

3. The pelletizing disk of the combined scraper as claimed in claim 1, characterized in that: The fixed scraper structure comprises a fixed disc center scraper and a fixed side scraper.

4. The pelletizing disk of the combined scraper as claimed in claim 1, characterized in that: The scraper fixing frame is a frame structure with an open bottom.

5. The pelletizing disk of the combined scraper as claimed in claim 1, characterized in that: The scraper fixing frame is provided with a transverse movable slide rail and a transverse sliding block arranged on the transverse movable slide rail, the transverse sliding block is provided with a lifting structure that can move perpendicular to the direction of the disc, the lifting structure is provided with a scraper fixing plate, and the scraper fixing plate is provided with a group of scrapers.

6. The pelletizing disk of the combined scraper as claimed in claim 2, characterized in that: The fixed disc center scraper is arranged corresponding to the disc center, and the fixed side scraper is arranged corresponding to the 12 o'clock area of ​​the ball-making disc surface.

7. The pelletizing disk with a combined scraper as claimed in claim 5, characterized in that: The transverse moving slide rail is arranged across the center of the disc.

8. The pelletizing disk with a combined scraper as claimed in claim 6, characterized in that: The fixed disc center scraper is set at an inclination angle of 40-45 degrees, and the bottom edge of the scraper is 34-36 mm away from the bottom material bed.

9. The pelletizing disk of the combined scraper as claimed in claim 8, characterized in that: The fixed edge scraper comprises a blade fixing plate and a group of blades arranged on the blade fixing plate, wherein the group of blades is in a "7"-shaped structure.

10. A method for controlling a pelletizing disk of a combined scraper according to any one of claims 1 to 9, characterized in that: The control method comprises the following steps: S1. The operator starts the ball-making disk, and the disk surface starts to rotate under the drive of the transmission system. The multi-blade reciprocating scraper drives the motor to make left and right reciprocating motion; S2. Start the feeding belt of the pelletizing disk, and the iron ore concentrate mixture enters the pelletizing disk. The mixture begins to roll into balls in the disk through mechanical force and capillary force. At the same time, part of the iron ore concentrate mixture in the pelletizing disk is bonded to the surface of the bottom material bed of the pelletizing disk under the action of adhesive and water, and the thickness of the bottom material bed gradually increases. S3, the multi-head reciprocating scraper moves back and forth along the scraper fixing frame above the pelletizing disk. The scraper head installed on it cleans the sticky material on the bottom material bed of the pelletizing disk during the movement, and keeps the thickness of the main area of ​​the bottom material bed constant; S4. During the rotation of the disc, the sticky material on the surface of the bottom material bed at the center of the disc is cleaned by a fixed scraper at the center of the disc to keep the thickness of the bottom material bed at the center of the disc constant; S5. During the rotation of the disc, the sticky material on the edge of the ball-making disc is cleaned by a fixed edge scraper to prevent the sticky material on the edge of the ball-making disc from thickening.

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