Coal mill for blast furnace

Abstract

The utility model discloses a coal mill for a blast furnace, and particularly relates to the technical field of iron and steel ironmaking, the coal mill comprises a casing, a millstone and a feed pipe, a partition plate is mounted at the top end in the casing, the feed pipe is mounted at the central position in the partition plate, and a switching type discharge component is arranged at the top end of the partition plate. The discharging assembly comprises a discharging groove, a switching table, a tooth groove, a filter pipe, a discharging pipe and a control box. By arranging the switching table, the multiple groups of filter pipes are annularly mounted on the inner side of the switching table, the filter holes in the bottom sides of the filter pipes are different in size, the gear is meshed with the tooth groove in the outer side wall of the switching table, and when the second motor is started, the gear is driven to rotate, and the switching table is driven to rotate above the partition plate, different filter pipes can be driven; the upper end and the lower end of the filter pipe are in butt joint with the discharging groove and the discharging pipe for use respectively, so that switching operation of the filter pipe is achieved, convenience is achieved when the filter pipe of the coal mill is switched and used, and the switching efficiency and safety of the filter pipe are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking, in particular to a coal mill used in a blast furnace. Background Art

[0002] Iron and steel making is the process of extracting metallic iron from iron-containing minerals. There are mainly blast furnace method, direct reduction method, molten reduction method and plasma method. Blast furnace smelting is a continuous production process of reducing iron ore into pig iron. Solid raw materials such as iron ore, coke and flux are fed into the blast furnace in batches by the furnace top charging device according to the specified proportion, and the throat material level is kept at a certain height. Coke and ore form an alternating layered structure in the furnace. This device is the coal mill used in the blast furnace.

[0003] During use, the coal mill needs to control the size of the discharged material by the size of the filter holes at the discharge port to ensure that the process requirements are met. However, when the filter holes need to be controlled and adjusted, the coal mill in the prior art uses a manual replacement of the filter plate and filter cartridge to adjust the filter plate and filter cartridge. Manual replacement of the filter plate and filter cartridge requires the staff to operate it personally, which is not only time-consuming and labor-intensive, but also has certain safety risks. Especially in large coal mills, the replacement of the filter plate and filter cartridge requires the cooperation of multiple people, which is more difficult to operate and has higher safety risks. In addition, frequent manual replacement of the filter plate and filter cartridge is inefficient, which increases equipment downtime and reduces production efficiency.

[0004] Therefore, a coal mill for blast furnace is needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a coal mill for a blast furnace, so as to solve the problem of adjusting the size of filter holes at a discharge port of the coal mill in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal mill for a blast furnace, comprising a casing, a grinding disc and a feeding pipe, a partition is installed at the top of the casing, a feeding pipe is installed at the center position of the partition, a switchable discharge assembly is arranged at the top of the partition, the discharge assembly comprises a discharge trough, a switching table, a tooth groove, a filter pipe, a discharge pipe and a control box, a discharge trough is arranged on one side of the bottom end of the partition, a switching table is arranged at the top of the partition, a tooth groove is arranged on the outer side wall of the switching table, a filter pipe is installed on the inner side of the switching table, a discharge pipe is installed on one side of the top end of the casing, a control box is installed at the top of one side of the casing, a gear is arranged inside the control box, and a second motor is installed at the bottom end of the gear.

[0007] Preferably, a reduction box is installed at the bottom end of the casing, a first motor is installed on one side of the reduction box, a grinding disc is installed at the top end of the reduction box, and a limiting platform is provided on the outer side wall of the grinding disc.

[0008] Preferably, a grinding roller is arranged at the top of the grinding disc, a frame is mounted on the top of the grinding roller, and a deflector is arranged above the frame.

[0009] Preferably, an observation window is provided on one side of the housing, and a transparent plate is installed inside the observation window.

[0010] Preferably, a plurality of tooth grooves are provided on the outer side wall of the switching table, and the plurality of tooth grooves are distributed at equal intervals.

[0011] Preferably, a plurality of filter tubes are installed on the inner side of the switching table, and the plurality of filter tubes are distributed in a ring shape.

[0012] Preferably, an air supply pipe is installed inside the limit platform, a nozzle is installed on one side of the air supply pipe, an isolation mesh plate is installed on one side of the nozzle, an air delivery pipe is installed on the other side of the air supply pipe, and one side of the air delivery pipe extends to the outside of the casing.

[0013] Preferably, four groups of the nozzles are installed on one side of the air supply pipe, and the four groups of the nozzles are symmetrically distributed.

[0014] Compared with the prior art, the utility model has the following beneficial effects: by providing a switching platform, a plurality of groups of filter tubes are installed in a ring shape on the inner side of the switching platform, the filter holes on the bottom side of the filter tubes are of different sizes, the gears are meshed with the tooth grooves on the outer side wall of the switching platform, the second motor is started, the gears are driven to rotate, and the switching platform is driven to rotate above the partition, so that different filter tubes can be driven, so that the upper and lower ends of the filter tubes are respectively connected to the discharge trough and the discharge pipe for use, so as to realize the switching operation of the filter tubes, realize the convenience of switching the filter tubes of the coal mill, improve the efficiency of filter tube switching, reduce equipment downtime, improve production efficiency, and improve the safety of filter tube switching;

[0015] An observation window is provided, which is located at the side end of the casing and corresponds to the grinding disc inside the casing. Through the transparent plate inside the observation window, the processing status of the material at the grinding disc can be observed, thus realizing the observability of the coal mill when in use;

[0016] By setting up an air supply pipe and a nozzle, the air delivery pipe can be connected to the equipment to transport hot air to the inside of the air supply pipe. The hot air is ejected through the nozzle, which can assist in driving the material powder on the surface of the grinding disc to move upward and discharge. There are four groups of nozzles installed, which are symmetrically distributed, and can assist in the uniform and stable movement of material powder, thereby enhancing the stability of the internal air supply of the coal mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0018] Figure 2It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the front cross-sectional structure of the switcher of the utility model;

[0020] Figure 4 It is a schematic diagram of the front cross-sectional structure of the air supply pipe of the utility model.

[0021] In the figure: 1. casing; 2. reduction box; 3. first motor; 4. grinding disc; 5. limit table; 6. grinding roller; 7. frame; 8. air guide cover; 9. partition; 10. feeding pipe; 11. observation window; 12. transparent plate; 13. discharge chute; 14. switching table; 15. tooth groove; 16. filter tube; 17. discharge pipe; 18. control box; 19. gear; 20. second motor; 21. air supply pipe; 22. nozzle; 23. isolation mesh plate; 24. air supply pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides an embodiment: a coal mill for a blast furnace, comprising a casing 1, a grinding disc 4 and a feeding pipe 10, a reduction box 2 is installed at the bottom end of the casing 1, a first motor 3 is installed on one side of the reduction box 2, a grinding disc 4 is installed on the top of the reduction box 2, a limiting platform 5 is provided on the outer side wall of the grinding disc 4, a grinding roller 6 is provided on the top of the grinding disc 4, a frame 7 is installed on the top of the grinding roller 6, a guide cover 8 is provided above the frame 7, a partition 9 is installed on the top of the casing 1, a feeding pipe 10 is installed at the center position inside the partition 9, an observation window 11 is provided on one side of the casing 1, and a transparent plate 12 is installed inside the observation window 11;

[0024] Specifically, Figure 1 and Figure 2 As shown, when in use, the observation window 11 is located at the side end of the casing 1, and a transparent plate 12 is installed on the inner side of the observation window 11. The observation window 11 and the transparent plate 12 cooperate to assist the operator in observing the processing of the material inside the casing 1. The guide cover 8 can be used for guiding when adding materials, and the powdered material can also be moved upward from the multiple groups of holes on the surface of the guide cover 8 driven by the airflow in the later stage;

[0025] A switchable discharge assembly is provided at the top of the partition 9, and the discharge assembly includes a discharge trough 13, a switching platform 14, a tooth groove 15, a filter tube 16, a discharge pipe 17 and a control box 18. A discharge trough 13 is provided on one side of the bottom end of the partition 9, and a switching platform 14 is provided on the top of the partition 9. The outer wall of the switching platform 14 is provided with a tooth groove 15. There are several tooth grooves 15 provided on the outer wall of the switching platform 14, and the several tooth grooves 15 are distributed at equal intervals. A filter tube 16 is installed on the inner side of the switching platform 14. There are several filter tubes 16 installed on the inner side of the switching platform 14, and the several filter tubes 16 are distributed in an annular shape. A discharge pipe 17 is installed on one side of the top of the casing 1. A control box 18 is installed on the top of one side of the casing 1. A gear 19 is provided inside the control box 18, and a second motor 20 is installed at the bottom end of the gear 19;

[0026] Specifically, Figure 1 and Figure 3 As shown, when in use, the gear 19 is meshed with the tooth groove 15, and the second motor 20 is started. The gear 19 cooperates with the tooth groove 15 to drive the switching table 14 to rotate. Multiple groups of filter tubes 16 of different specifications are annularly installed on the inner side of the switching table 14. As the switching table 14 rotates, the filter tubes 16 can be switched to dock with the discharge trough 13 and the discharge pipe 17 for use;

[0027] An air supply pipe 21 is installed inside the limiting platform 5, and a nozzle 22 is installed on one side of the air supply pipe 21. Four groups of nozzles 22 are installed on one side of the air supply pipe 21. The four groups of nozzles 22 are symmetrically distributed. An isolation mesh plate 23 is installed on one side of the nozzle 22. An air delivery pipe 24 is installed on the other side of the air supply pipe 21. One side of the air delivery pipe 24 extends to the outside of the casing 1.

[0028] Specifically, Figure 1 and Figure 4 As shown, when in use, the air delivery pipe 24 is connected to an external device, and after the hot air is transported to the inside of the air supply pipe 21, the hot air is sent out through four groups of nozzles 22. The four groups of nozzles 22 are symmetrically distributed around the grinding disc 4, and the material powder can be evenly driven to move upward through the airflow. The discharge pipe 17 can be connected to an induced draft fan or an exhaust fan to assist the airflow and powder material to be sent out.

[0029] Working principle: When in use, after opening the feeding pipe 10, the material falls into the casing 1 through the feeding pipe 10 and is placed on the grinding disc 4, the internal channel of the feeding pipe 10 can be closed, the device can be started, the grinding disc 4 cooperates with the grinding roller 6 to perform the material crushing operation, and the operator can observe through the observation window 11 at the side end to observe the material processing status. The air supply pipe 24 can be connected to the equipment to transport hot air into the air supply pipe 21. Four groups of nozzles 22 are symmetrically distributed around the grinding disc 4. After the hot air is ejected through the nozzles 22, the airflow can drive the material powder to move upward, and finally, through the discharge trough 1 3. The filter tube 16 and the discharge pipe 17 are discharged. The discharge pipe 17 can be connected to an induced draft fan or an exhaust fan to assist the airflow and the powder material to be sent out. The filter holes on the bottom side of the filter tube 16 can control the size of the material powder. Multiple groups of filter tubes 16 are located on the inner side of the switching table 14, and the filter holes on the bottom side are of different sizes. Start the second motor 20, and the gear 19 cooperates with the tooth groove 15 on the outer wall of the switching table 14 to drive the switching table 14 to rotate. When the switching table 14 rotates, the inner filter tube 16 can be driven to switch, and the appropriate filter tube 16 is driven to connect with the discharge trough 13 and the discharge pipe 17 for use.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A coal mill for a blast furnace, comprising a housing (1), a grinding disc (4) and a feeding pipe (10), characterized in that: A partition (9) is installed at the top end of the casing (1), a feeding pipe (10) is installed at the center of the partition (9), and a switchable discharge assembly is provided at the top end of the partition (9); The discharge assembly comprises a discharge trough (13), a switching platform (14), a tooth groove (15), a filter tube (16), a discharge pipe (17) and a control box (18); a discharge trough (13) is arranged on one side of the bottom end of the partition (9); a switching platform (14) is arranged on the top end of the partition (9); a tooth groove (15) is arranged on the outer wall of the switching platform (14); a filter tube (16) is installed on the inner side of the switching platform (14); a discharge pipe (17) is installed on one side of the top end of the casing (1); a control box (18) is installed on the top end of one side of the casing (1); a gear (19) is arranged inside the control box (18); and a second motor (20) is installed at the bottom end of the gear (19).

2. A coal mill for a blast furnace according to claim 1, characterized in that: A reduction box (2) is installed at the bottom end of the casing (1), a first motor (3) is installed on one side of the reduction box (2), a grinding disc (4) is installed at the top end of the reduction box (2), and a limiting platform (5) is provided on the outer side wall of the grinding disc (4).

3. A coal mill for a blast furnace according to claim 2, characterized in that: A grinding roller (6) is arranged at the top of the grinding disc (4), a frame (7) is installed at the top of the grinding roller (6), and a deflector (8) is arranged above the frame (7).

4. A coal mill for a blast furnace according to claim 1, characterized in that: An observation window (11) is provided on one side of the housing (1), and a transparent plate (12) is installed inside the observation window (11).

5. A coal mill for a blast furnace according to claim 1, characterized in that: A plurality of tooth grooves (15) are arranged on the outer side wall of the switching platform (14), and the plurality of tooth grooves (15) are distributed at equal intervals.

6. A coal mill for a blast furnace according to claim 1, characterized in that: A plurality of filter tubes (16) are installed on the inner side of the switching platform (14), and the plurality of filter tubes (16) are distributed in a ring shape.

7. A coal mill for a blast furnace according to claim 2, characterized in that: An air supply pipe (21) is installed inside the limiting platform (5), a nozzle (22) is installed on one side of the air supply pipe (21), an isolation mesh plate (23) is installed on one side of the nozzle (22), and an air delivery pipe (24) is installed on the other side of the air supply pipe (21), and one side of the air delivery pipe (24) extends to the outside of the casing (1).

8. A coal mill for a blast furnace according to claim 7, characterized in that: Four groups of the nozzles (22) are installed on one side of the air supply pipe (21), and the four groups of the nozzles (22) are symmetrically distributed.

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