Device and method for pulverizing coke with uniform granularity

Abstract

The invention discloses a uniform-granularity coke pulverizing device and method, relates to the technical field of coke pulverizing, and aims at solving the problems that raw materials obtained in the coke pulverizing and screening process are low in granularity uniformity and large in thickness and appearance difference. The coke circulating conveying structure is arranged, coke is automatically sorted in the rotating process, meanwhile, intercepted large-particle-size coke is actively crushed, high-efficiency screening and discharging of the coke are achieved, in order to meet the requirement for particle size uniformity of the screened coke, the screened coke with difference is subjected to secondary filtering, and the screening efficiency of the coke is improved. The sieve plate of a special structure is matched with the first transmission mechanism to synchronously move, the primarily sorted coke pieces and irregular coke rolling materials are distinguished, finally, the coke pieces and the irregular coke rolling materials are discharged in a classified mode through a runner on the outer side of the ash blocking cover and are rapidly collected by an operator, and the particle size uniformity of the obtained coke is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of coke pulverizing, and in particular to a device and method for pulverizing coke with uniform particle size. Background Art

[0002] Coke is an indispensable material in blast furnace ironmaking, which has a great influence on the progress of blast furnace ironmaking technology. It plays an important role in blast furnace ironmaking technology. It can reduce the ash and sulfur content in coal, increase the proportion of main coking coal, and improve the M40 and M10 indicators of coke.

[0003] The technical means of reducing the content of coke particles and coke dust in coke include material selection, mixing ratio adjustment, crushing processing and screening and sorting. Among them, material selection is one of the most important factors affecting the particle size of coke. Different raw materials will produce different coke particle sizes after being processed by different coking processes. Therefore, selecting the corresponding raw materials is the basis for controlling the particle size of coke. Different cokes are mixed in order to achieve the required particle size. Mastering the mixing ratio of different cokes can effectively ensure the control of coke particle size. After crushing the coke with large particle size, the required particle size can be obtained. Screening and sorting are often used to control the situation where the coke particle size is too small. Screening can remove the coke dust particles that are too small, thereby controlling the particle size of coke. Therefore, sorting the coke particle size is particularly important in the subsequent blast furnace ironmaking research.

[0004] To this end, we propose a device and method for making coke powder with uniform particle size. Summary of the invention

[0005] The object of the present invention is to provide a coke pulverizing device and method with uniform particle size, so as to solve the technical optimization problem involved in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a coke pulverizing device with uniform particle size, comprising an ash shield and a rolling channel, one side of the ash shield is fixed with a rolling channel by bolts, a placing frame is installed in the ash shield, a transmission shaft 1 is movably connected to the placing frame by a bearing, and a material distribution roller is fixed to the transmission shaft 1 by welding through a bracket;

[0007] A reel is movably connected in the rolling channel, a transmission shaft 2 is fixedly installed on the reel, the transmission shaft 1 is connected to the transmission shaft 2 by gear meshing, a scraper cover is evenly fixed on the outer wall of the reel by welding, a material receiving hopper is fixed to the inner wall of the rolling channel by bolts, and a winding shaft is movably connected in the material receiving hopper, and a feeding port is opened on the side of the rolling channel.

[0008] Furthermore, a flow channel four is provided on the placement rack and located on the side of the material distribution roller, and a crushing channel is fixedly connected to the flow channel four, and the other side of the crushing channel is connected to the rolling channel.

[0009] Furthermore, a transmission mechanism 2 is fixed to the outer wall of the crushing channel by bolts, and the transmission mechanism 2 is located in the crushing channel and connected to a crushing hammer, and one side of the crushing hammer is movably connected to the inner wall of the crushing channel, and a baffle is fixedly connected to the inner wall of the crushing channel and located on the crushing hammer side.

[0010] Furthermore, flow channel 1, flow channel 2 and flow channel 3 are provided on the placement rack and at the bottom of the material distribution drum, and one side of flow channel 1, flow channel 2 and flow channel 3 passes through the dust shield and is fixedly connected to the dust shield.

[0011] Furthermore, a transmission mechanism 1 is fixed to the top of the placement rack by bolts, a linkage mechanism is installed on the placement rack on one side of the transmission mechanism, and a swing adjustment mechanism is installed on the linkage mechanism side.

[0012] Furthermore, the swing adjustment mechanism includes a rotating column, a sliding plate and a movable plate. The linkage mechanism side is movably connected with the rotating column, the movable plate is rotatably connected on the cross-section of the outer wall of the rotating column, the sliding plate is slidably connected on the outer wall of the rotating column, and the sliding plate side is rotatably connected with a connecting rod, and the other end of the connecting rod is movably connected to the movable plate side.

[0013] Furthermore, a transmission mechanism three is fixedly connected to the placement rack, a clamping block is slidably connected in the top groove of the placement rack, and the clamping block is clamped with the sliding plate, a threaded rod is installed on the transmission mechanism three, passes through the clamping block and is threadedly connected to the clamping block, and a material receiving plate is fixedly connected to the placement rack and located at the bottom of the material distribution roller.

[0014] Furthermore, a sieve plate is slidably connected to the top of the material receiving plate, steel bars are evenly fixedly connected to the sieve plate, a crushing plate is fixed to the sieve plate by welding, a clamping column is fixed to one side of the bottom of the sieve plate by welding, and one end of the clamping column is in contact with the movable disk.

[0015] The present invention also provides a method for preparing coke powder with uniform particle size, comprising the following steps:

[0016] Coke rolling screening: The coke on the conveyor belt enters the rolling channel through the feeding port. As the transmission mechanism works, the drum rotates and carries the coke into the receiving hopper through the scraper cover. The coke enters the dividing drum as the coil shaft rotates.

[0017] The powder material with a particle size of less than 15mm in the coke material falls into flow channel 1 through the head of the dividing drum, and is directly discharged from the ash shield along flow channel 1. As the dividing drum continues to rotate, the remaining coke material comes to the middle of the dividing drum. The flake material and part of the ball material in the coke material fall directly on the steel bar on the side of the screen plate. The screen plate shakes left and right, and the ball material on the steel bar rolls into flow channel 3, while the flake material falls directly into flow channel 2. The remaining coke material enters the tail of the dividing drum. The falling coke material is intercepted and shaken by the crushing plate on the screen plate, and then discharged through flow channel 3. Finally, the coke material with a particle size greater than 60mm enters the crushing channel from flow channel 4.

[0018] Circular crushing and powder making: The coke material entering the crushing channel contacts the crushing hammer driven by the second transmission mechanism during the rolling process, and the crushed coke material returns to the rolling channel, is collected by the scraper cover, and is re-screened along with the new coke material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention aims to improve the efficiency of coke pulverizing and the uniformity of coke sorting, provide a guarantee for the porosity of coke in the subsequent furnace, and greatly improve the utilization coefficient of the coke oven. The drive assembly is set to drive the material distribution drum and the reel to rotate, and the coke is sorted and loaded in coordination with the rotation process. At the same time, the coke discharged at the end of the sorting can also be slid and crushed through the provided crushing channel, and then re-sorted for the second time after crushing. The circulating feeding and crushing and sorting are carried out simultaneously, thereby improving the efficiency of obtaining coke with uniform particle size.

[0021] 2. In the present invention, in order to obtain more uniform coke for detailed processing, on the basis of coke particle size sorting, coke of different shapes can be deeply selected to further improve the overall coke uniformity. The rotating column is driven to rotate through the transmission mechanism, and the position of the sliding plate on the upper rotating column is adjusted to achieve the rotation trajectory adjustment of the entire movable plate, thereby driving the bottom sieve plate of the material distribution drum to slide left and right, and the steel bars installed on the sieve plate are used to intercept and sort the coke flakes and rolling materials, and the crushing plate is used to filter the agglomerated crushed materials, so that the sorted coke remains consistent in appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the coke pulverizing device with uniform particle size of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the coke pulverizing device with uniform particle size without the ash shield of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the crushing channel and the rolling channel of the present invention;

[0025] Figure 4 It is a schematic diagram of the flow channel installation structure of the coke pulverizing device with uniform particle size of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of a coke pulverizing device with uniform particle size according to the present invention;

[0027] Figure 6 It is a schematic diagram of the connection structure between the swing adjustment mechanism and the screen plate of the present invention;

[0028] Figure 7 It is a schematic diagram of the connection structure between the movable disk and the clamping column of the present invention;

[0029] Figure 8 It is a schematic diagram of the installation structure of the breaker hammer in the breaker channel of the present invention.

[0030] In the figure: 1. dust shield; 2. material rolling channel; 3. placement rack; 4. transmission mechanism 1; 5. transmission shaft 1; 6. material distribution roller; 7. transmission shaft 2; 8. reel; 9. scraper cover; 10. feeding port; 11. receiving hopper; 12. reel shaft; 13. flow channel 1; 14. flow channel 2; 15. flow channel 3; 16. flow channel 4; 17. crushing channel; 18. transmission mechanism 2; 19. crushing hammer; 20. baffle; 21. linkage mechanism; 22. swing adjustment mechanism; 221. rotating column; 222. sliding plate; 223. movable plate; 224. connecting rod; 23. transmission mechanism 3; 24. clamping block; 25. sieve plate; 26. steel bar; 27. crushing plate; 28. receiving plate; 29. ​​clamping column. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-8 , the present invention provides a technical solution:

[0033] Example 1: By reducing the content of coke particles and coke dust in coke, the effect of improving the utilization coefficient can be improved by reducing the reducing agent ratio, reducing the unit consumption of coal gas, and improving various factors of the coke oven utilization coefficient, such as improving the efficiency of the coke oven, reducing heat loss and inhibiting the reduction balance;

[0034] Among them, since the coke particle size will directly affect the liquid permeability, increasing the coke particle size and increasing the coke strength to increase the coke porosity has the greatest effect, and the coke particle size is uniform and less powder. For the coke particle size, both the block size and the particle size are required to be appropriate. The coke particle size range is increased to 20-60mm. For coke used in small and medium blast furnaces, the particle size is preferably 20-40mm and greater than 15mm;

[0035] According to the required coke particle size range, the coke powder is classified into granular powder, rolling material, i.e. irregular spherical material and flake material. The rolling material also includes large particle size and small particle size. The required small particle size rolling material is filtered, and the intercepted large particle size rolling material is crushed;

[0036] Specific operations such as Figure 1 and Figure 2 As shown, a transmission mechanism 4 is installed on the placement frame 3 in the ash shield 1. The motor in the transmission mechanism 4 drives the transmission shaft 5 to rotate through the belt transmission, and the material distribution roller 6 fixed on the transmission shaft 5 also rotates. Figure 4 It can be understood that the material distribution drum 6 is in the shape of a truncated cone, and the radius increases from left to right. After the material is placed, the centrifugal force generated by the rotation of the material distribution drum 6 continuously drives the material to move to one side. At the same time, the outer wall of the entire material distribution drum 6 is modified in three parts. The head is connected by a circular iron wire frame, and the spacing between the circular iron wire frames is small, while the spacing between the circular iron wire frames in the middle is large.

[0037] The former is used to filter the powder material, and the latter is used to filter the flake material and part of the rolling material. The coke material passing through the middle comes to the tail side of the circular plate, and the aperture is larger, which is convenient for the rolling material to fall. Finally, the large-size coke that cannot be filtered on the material distribution drum 6 automatically rolls into the flow channel 4 16;

[0038] Corresponding to the outer wall of the material distribution roller 6, a flow channel 13, a flow channel 2 14 and a flow channel 3 15 are provided on the placement rack 3 from left to right, corresponding to the acquisition of powder material, sheet material and required rolling material;

[0039] For coke material transportation, Figure 3 As shown, a feeding port 10 is installed on the side of the rolling channel 2, and an external conveyor belt continuously feeds coke into the rolling channel 2. At the same time, a reel 8 is movably connected in the rolling channel 2, and a scraper cover 9 is evenly installed on the outer wall of the reel 8. At the same time, a transmission shaft 2 7 is fixedly connected to the reel 8, and a gear is connected to the end of the transmission shaft 1 5 to drive the transmission shaft 2 7 to rotate simultaneously;

[0040] Therefore, when the transmission mechanism 14 is working, the reel 8 in the entire rolling channel 2 rotates at the same time, and the coke in the rolling channel 2 can be dug during the rotation of the scraper cover 9. The corresponding rolling channel 2 is fixed with a receiving hopper 11. When the scraper cover 9 carrying the coke rotates to the top, the coke it carries automatically falls into the receiving hopper 11. At the same time, the reel shaft 12 in the receiving hopper 11 rotates and can deliver the coke into the material distribution drum 6, completing the automatic feeding work in the entire coke sorting process;

[0041] Considering the large-size coke that continuously enters the flow channel 4 16, Figure 3 As shown, the outer wall of the entire crushing channel 17 is equipped with a transmission mechanism 18. Figure 8 As shown, a crushing hammer 19 is movably connected in the crushing channel 17, and the transmission mechanism drives the entire crushing hammer 19 to rotate, so as to perform rotary powder impact crushing on the large-sized coke falling in the crushing channel 17, while preventing some large-sized coke from flying out from the top of the crushing channel 17 during the impact process. A baffle 20 is also fixedly arranged on the side of the crushing hammer 19, and when the large-sized coke is completely crushed, it automatically slides into the rolling channel 2, and returns to the dividing drum 6 for rotation and sorting along with the continuously entering new material.

[0042] Embodiment 2: During the coke rotation sorting process, since the coke flakes and part of the rolling material fall down during the rotation of the middle part of the material distribution drum 6, a sieve plate 25 is installed at the bottom of the material distribution drum 6 for this type of coke sorting, and the sieve plate 25 is driven by the transmission mechanism 4 at the same time;

[0043] like Figure 6 As shown, a linkage mechanism 21 is installed on the motor side of the transmission mechanism 4, and a swing adjustment mechanism 22 is arranged on the top side of the linkage mechanism 21, wherein the rotation of the motor on the transmission mechanism 4 drives the internal gear of the linkage mechanism 21 to rotate, and the gear on the side of the linkage mechanism 21 is connected to the rotating column 221, thereby driving the entire rotating column 221 to rotate, and a sliding plate 222 is slidably connected on the rotating column 221, and a movable plate 223 is rotatably connected on the side section of the rotating column 221, and the movable plate 223 can rotate on the cross section of the rotating column 221, and a connecting rod 224 is connected to the movable plate 223 and the sliding plate 222 side;

[0044] Therefore, by changing the position of the sliding plate 222 on the rotating column 221, the entire movable plate 223 is driven to rotate in an angle, while the normal rotation of the entire rotating column 221 is not affected. When the angle of the entire movable plate 223 changes, the movement trajectory of the movable plate 223 changes when the rotating column 221 rotates.

[0045] The movable disk 223 is used to rotate the track change, such as Figure 7As shown, the clamping column 29 installed on the side of the screen plate 25 is clamped with the movable disk 223. When the entire movable disk 223 rotates with the rotating column 221, the trajectory of the left and right changes also affects the clamped screen plate 25, thereby driving the entire screen plate 25 to swing left and right on the top of the receiving plate 28, so as to screen the coke falling from the bottom of the distributing drum 6. The greater the deflection angle of the entire movable disk 223, the greater the swing amplitude of the entire screen plate 25. Therefore, the swing amplitude of the screen plate 25 can be adjusted by adjusting the position of the entire sliding plate 222 on the rotating column 221.

[0046] For this purpose, a transmission mechanism 3 23 is installed on one side of the entire placement rack 3, a threaded rod is fixed to the end of the motor in the transmission mechanism 3 23, and a clamping block 24 is clamped at the bottom of the slide plate 222. The clamping block 24 is driven to slide on the top of the placement rack 3 by the rotation of the threaded rod, and the position of the entire clamping slide plate 222 is changed at the same time, so as to complete the automatic adjustment of the swing amplitude of the screen plate 25;

[0047] Considering that the swing of the screen plate 25 is used to screen the falling coke flakes and rolling materials, the flakes falling from the middle of the material distribution drum 6 fall directly on the steel bars 26 installed on the screen plate 25. The steel bars 26 here are installed in groups, and the adjacent side steel bars 26 groups are not on the same horizontal line. When the coke flakes and rolling materials fall into the gap between the two steel bars 26 at the same time, the gap between the rolling materials and the steel bars 26 is more consistent, and at this time, part of the flakes directly fall into the flow channel 2 14 through the gap. Part of the flakes will also fall quickly due to the up and down arrangement of the steel bars 26 and the left and right swing of the screen plate 25, while the rolling materials located in the gap will slide on the steel bars 26 with an inclined angle, and finally fall onto the receiving plate 28 at the lowest position, and enter the flow channel 3 15 with the receiving plate 28, thus realizing the automatic screening of the rolling materials and flakes in the coke.

[0048] As for the coke material on the crushing plate 27 falling to the side of the screen plate 25, considering the agglomerated material in the rolling material, when the screen plate 25 swings left and right, the rolling material continuously moves and collides with the hole side of the crushing plate 27, and some of the agglomerated material is directly crushed, while some of the rolling material directly falls into the flow channel 15 through the holes. Therefore, the installation of the crushing plate 27 further intercepts the agglomerated bulk material in the rolling material. Figure 1 As shown, the agglomerated bulk materials are broken and fall onto the flow channel 3 15 synchronously, and then slide to the outlet position of the dust shield 1 side. At this time, the flow channel 3 15 is also provided with a sieve hole to filter the broken materials generated on the rolling side, thereby further improving the uniformity of the screening rolling materials.

[0049] The coke pulverizing device is used to perform crushing and sorting operations, and the multi-state coke mixture is divided regularly, while ensuring the coke sorting efficiency, improving the subsequent coke oven efficiency and reducing overall heat loss.

[0050] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A coke pulverizing device with uniform particle size, comprising an ash shield (1) and a rolling channel (2), wherein the rolling channel (2) is fixed to one side of the ash shield (1) by bolts, characterized in that: A placement frame (3) is installed in the dust shield (1), a transmission shaft (5) is movably connected to the placement frame (3) via a bearing, and a material distribution roller (6) is welded and fixed to the transmission shaft (5) via a bracket; A reel (8) is movably connected inside the material rolling channel (2), a second transmission shaft (7) is fixedly mounted on the reel (8), the first transmission shaft (5) is meshingly connected with the second transmission shaft (7) via gears, a scraper cover (9) is evenly fixed to the outer wall of the reel (8) via welding, a material receiving hopper (11) is fixed to the inner wall of the material rolling channel (2) via bolts, and a reel shaft (12) is movably connected inside the material receiving hopper (11), and a feeding port (10) is provided on the side of the material rolling channel (2).

2. A coke pulverizing device with uniform particle size according to claim 1, characterized in that: A flow channel four (16) is provided on the placement frame (3) and located on the side of the material distribution roller (6). A crushing channel (17) is fixedly connected to the flow channel four (16), and the other side of the crushing channel (17) is connected to the rolling channel (2).

3. A coke pulverizing device with uniform particle size according to claim 2, characterized in that: The outer wall of the crushing channel (17) is fixed with a second transmission mechanism (18) by bolts; the second transmission mechanism (18) is located in the crushing channel (17) and is connected to a crushing hammer (19); one side of the crushing hammer (19) is movably connected to the inner wall of the crushing channel (17); and a baffle (20) is fixedly connected to the inner wall of the crushing channel (17) and located on the side of the crushing hammer (19).

4. The coke pulverizing device with uniform particle size according to claim 3, characterized in that: A flow channel 1 (13), a flow channel 2 (14) and a flow channel 3 (15) are provided on the placement rack (3) and at the bottom of the material distribution roller (6); one side of the flow channel 1 (13), the flow channel 2 (14) and the flow channel 3 (15) passes through the dust shield (1) and is fixedly connected to the dust shield (1).

5. The coke pulverizing device with uniform particle size according to claim 4, characterized in that: A transmission mechanism (4) is fixed to the top of the placement rack (3) by bolts, a linkage mechanism (21) is installed on the placement rack (3) on the side of the transmission mechanism (4), and a swing adjustment mechanism (22) is installed on the side of the linkage mechanism (21).

6. The device for making coke powder with uniform particle size according to claim 5, characterized in that: The swing adjustment mechanism (22) comprises a rotating column (221), a sliding plate (222) and a movable plate (223); the rotating column (221) is movably connected to the linkage mechanism (21); the movable plate (223) is rotatably connected to the cut surface of the outer wall of the rotating column (221); the sliding plate (222) is slidably connected to the outer wall of the rotating column (221); the sliding plate (222) is rotatably connected to a connecting rod (224) on the side; the other end of the connecting rod (224) is movably connected to the side of the movable plate (223).

7. A coke pulverizing device with uniform particle size according to claim 6, characterized in that: The placement rack (3) is fixedly connected to a transmission mechanism three (23); a clamping block (24) is slidably connected in a groove at the top of the placement rack (3), and the clamping block (24) is clamped with a sliding plate (222); a threaded rod is installed on the transmission mechanism three (23) and passes through the clamping block (24) and is threadedly connected to the clamping block (24); a receiving plate (28) is fixedly connected to the placement rack (3) and located at the bottom of the material distribution roller (6).

8. The coke pulverizing device with uniform particle size according to claim 7, characterized in that: The top of the receiving plate (28) is slidably connected to a sieve plate (25), a steel bar (26) is evenly fixedly connected to the sieve plate (25), a crushing plate (27) is fixed to the sieve plate (25) by welding, and a clamping column (29) is fixed to one side of the bottom of the sieve plate (25) by welding, and one end of the clamping column (29) is in contact with the movable plate (223).

9. A method for making coke powder with uniform particle size, using the coke powder making device with uniform particle size as claimed in claim 8, characterized in that: The steps include: Coke rolling screening: the coke material on the conveyor belt enters the rolling channel (2) through the feeding port (10), and as the transmission mechanism (4) works, the reel (8) rotates and carries the coke through the scraper cover (9) into the receiving hopper (11), and the coke enters the material distribution drum (6) under the rotation of the reel shaft (12); The powder material with a particle size of less than 15 mm in the coke material falls into the flow channel 1 (13) through the head of the material distribution drum (6), and is directly discharged from the ash shield (1) along the flow channel 1 (13). As the material distribution drum (6) continues to rotate, the remaining coke material comes to the middle of the material distribution drum (6). The flake material and part of the ball material in the coke material directly fall on the steel bar (26) on the side of the screen plate (25). The screen plate (25) shakes left and right, and the ball material on the steel bar (26) rolls into the flow channel 3 (15), while the flake material directly falls into the flow channel 2 (14). The remaining coke material enters the tail of the material distribution drum (6). The falling coke material is intercepted and shaken by the crushing plate (27) on the screen plate (25), and is discharged through the flow channel 3 (15). Finally, the coke material with a particle size greater than 60 mm is left and enters the crushing channel (17) from the flow channel 4 (16); Circular crushing and pulverizing: During the rolling process of the coke material entering the crushing channel (17), the coke material contacts the crushing hammer (19) driven by the second transmission mechanism (18), and the crushed coke material returns to the rolling channel (2), is collected by the scraper cover (9), and is re-screened along with the new coke material.

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