A coal mill for iron and steel plants

Abstract

This application relates to the field of coal mills, and more particularly to a coal mill for ironmaking plants, comprising a base, a casing, a rotating disc, grinding rollers, a pressure frame, a separator, a feed pipe, a discharge pipe, and a striking assembly mounted on the discharge pipe. The casing is mounted on the top of the base. The rotating disc is rotatably mounted on the top of the base via a reducer, and a main unit is mounted on the reducer. An air supply assembly is installed around the rotating disc. The pressure frame is installed inside the casing. The grinding rollers are mounted at the bottom of the pressure frame and abut against the top of the rotating disc. The separator is mounted on the top of the casing. The feed pipe penetrates the outer wall of the casing and extends directly above the rotating disc. The discharge pipe is mounted on the top of the separator. The striking assembly is mounted on the outer wall of the discharge pipe. This application has the effect of saving time and effort in cleaning coal dust from the inner wall of the discharge pipe.

Description

Technical Field

[0001] This application relates to the field of coal mills, and more particularly to a coal mill for use in iron and steel plants. Background Technology

[0002] Ironmaking is the process of refining metallic iron from iron-bearing minerals. The main methods include the blast furnace method, direct reduction method, smelting reduction method, and plasma method. Blast furnace smelting is a continuous production process that reduces iron ore into pig iron. Solid raw materials such as iron ore, coke, and flux are fed into the blast furnace in batches according to the specified proportions by the top charging device, and the burden level in the furnace throat is maintained at a certain height. Coke and ore form an alternating layered structure in the furnace. This device is the coal mill used in blast furnaces.

[0003] During use, coal lumps are ground into coal powder by the coal mill. The coal powder is then transported to the coal storage tank through the discharge pipe. As the coal powder passes through the discharge pipe, some coal powder adheres to the inner wall of the discharge pipe. Cleaning the coal powder on the inner wall of the discharge pipe requires shutting down the equipment and having staff clean it, which is time-consuming and labor-intensive. Utility Model Content

[0004] In order to save time and effort in cleaning the coal powder on the inner wall of the discharge pipe, this application provides a coal mill for ironmaking plants.

[0005] The technical solution for a coal mill used in an ironmaking plant provided in this application is as follows: A coal mill for an ironmaking plant includes a base, a casing, a rotating disc, grinding rollers, a pressure frame, a separator, a feed pipe, a discharge pipe, and a striking assembly mounted on the discharge pipe. The casing is mounted on the top of the base. The rotating disc is rotatably mounted on the top of the base via a reducer. A main unit is mounted on the reducer. An air supply assembly is installed around the rotating disc. The pressure frame is installed inside the casing. The grinding rollers are mounted at the bottom of the pressure frame and abut against the top of the rotating disc. The separator is mounted on the top of the casing. The feed pipe penetrates the outer wall of the casing and extends directly above the rotating disc. The discharge pipe is mounted on the top of the separator. The striking assembly is mounted on the outer wall of the discharge pipe.

[0006] Optionally, the striking assembly includes an electric telescopic rod, a connecting rod, and a striking hammer. The electric telescopic rod is fixedly installed on the outer wall of the discharge pipe, the connecting rod is fixedly installed on the output end of the electric telescopic rod, and the striking hammer is fixedly installed on the connecting rod. The striking hammer abuts against the outer wall of the discharge pipe.

[0007] Optionally, the striking hammer is a rubber striking hammer.

[0008] Optionally, a connecting pipe is installed around the outer wall of the discharge pipe, and sound insulation cotton is installed on the inner wall of the connecting pipe.

[0009] Optionally, the air supply assembly includes a blower, an air supply pipe, and multiple nozzles. The blower is installed inside the base, one end of the air supply pipe is connected to the blower, and the other end is wrapped around the rotating disk. The multiple nozzles are equidistantly installed at the top of the air supply pipe.

[0010] Optionally, a support plate for placing the air supply duct is installed inside the housing, and the support plate and the rotating disk are located on the same horizontal plane.

[0011] Optionally, the housing has a connection hole, and a glass plate is installed at the connection hole.

[0012] In summary, this application includes at least one of the following beneficial technical effects: Coal blocks fall onto a rotating disc through the feed pipe. The reducer drives the rotating disc to rotate, and the grinding rollers grind the coal blocks into coal powder. During the rotation of the rotating disc, under the action of centrifugal force, the coal powder moves towards the edge of the rotating disc. Then, the blower delivers hot air through the air supply pipe to multiple nozzles. The hot air from the multiple nozzles blows the coal powder upwards, and then the coal powder is conveyed to the discharge pipe through the separator. The knocking component on the discharge pipe knocks the discharge pipe, causing the coal powder adhering to the inner wall of the discharge pipe to fall off and be conveyed to the storage tank, achieving the effect of saving time and labor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a coal mill for an ironmaking plant according to an embodiment of this application.

[0014] Figure 2 This is a schematic diagram of the internal structure of a coal mill casing for an ironmaking plant, according to an embodiment of this application.

[0015] Figure 3 This is a schematic diagram of the internal structure of the base of a coal mill for an ironmaking plant, according to an embodiment of this application.

[0016] Figure 4 This is an exploded view of the discharge pipe of a coal mill used in an ironmaking plant, according to an embodiment of this application.

[0017] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0018] Explanation of reference numerals in the attached drawings: 1. Base; 11. Reducer; 12. Main unit; 2. Housing; 21. Support plate; 22. Connecting hole; 23. Glass plate; 3. Rotating disc; 4. Grinding roller; 5. Press frame; 6. Separator; 7. Feed pipe; 8. Discharge pipe; 81. Connecting pipe; 811. Sound insulation cotton; 9. Striking assembly; 91. Electric telescopic rod; 92. Connecting rod; 93. Striking hammer; 10. Air supply assembly; 101. Blower; 102. Air supply pipe; 103. Nozzle. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0020] This application discloses a coal mill for ironmaking plants.

[0021] Reference Figures 1 to 5 A coal mill for ironmaking plants includes a base 1, a casing 2, a rotating disc 3, grinding rollers 4, a pressure frame 5, a separator 6, a feed pipe 7, a discharge pipe 8, and a striking assembly 9 installed on the discharge pipe 8.

[0022] The machine housing 2 is installed on the top of the machine base 1. The rotating disk 3 is rotatably installed on the top of the machine base 1 via the reducer 11. The main unit 12 is installed on the reducer 11. The air supply assembly 10 is installed around the rotating disk 3. The pressure frame 5 is installed inside the machine housing 2. The grinding roller 4 is installed at the bottom of the pressure frame 5 and abuts against the top of the rotating disk 3. The separator 6 is installed on the top of the machine housing 2. The feed pipe 7 penetrates the outer wall of the machine housing 2 and extends to the top of the rotating disk 3. The discharge pipe 8 is installed on the top of the separator 6. The striking assembly 9 is installed on the outer wall of the discharge pipe 8.

[0023] Coal blocks fall onto the rotating disk 3 through the feed pipe 7. The reducer 11 drives the rotating disk 3 to rotate, and the grinding roller 4 grinds the coal blocks into coal powder. During the rotation of the rotating disk 3, under the action of centrifugal force, the coal powder will move towards the edge of the rotating disk 3. Then, under the action of the air supply component 10, the coal powder moves upward and is then conveyed to the discharge pipe 8 through the separator 6. The knocking component 9 on the discharge pipe 8 will knock the discharge pipe 8, causing the coal powder adhering to the inner wall of the discharge pipe 8 to fall off.

[0024] Multiple striking components 9 are provided. Each striking component 9 includes an electric telescopic rod 91, a connecting rod 92, and a striking hammer 93. The electric telescopic rod 91 is fixedly installed on the outer wall of the discharge pipe 8. The connecting rod 92 is horizontally fixedly installed on the output end of the electric telescopic rod 91. The striking hammer 93 is fixedly installed on the connecting rod 92 and abuts against the outer wall of the discharge pipe 8. It should be noted that the striking hammer 93 is a rubber striking hammer, which can reduce damage to the discharge pipe 8.

[0025] The electric telescopic rod 91 first moves the hammer 93 away from the discharge pipe 8, and then moves the hammer 93 towards the discharge pipe 8 until the hammer 93 strikes the discharge pipe 8, thus completing the striking of the discharge pipe 8.

[0026] To reduce the noise generated by the hammer 93 striking the discharge pipe 8, a connecting pipe 81 is installed around the outer wall of the discharge pipe 8, and sound insulation cotton 811 is installed on the inner wall of the connecting pipe 81.

[0027] The air supply assembly 10 includes a blower 101, an air supply duct 102, and multiple nozzles 103. The blower 101 is installed inside the base 1. One end of the air supply duct 102 is connected to the blower 101, and the other end surrounds the rotating disk 3. The multiple nozzles 103 are equidistantly installed at the top of the air supply duct 102. A support plate 21 for placing the air supply duct 102 is installed inside the housing 2. The support plate 21 and the rotating disk 3 are located on the same horizontal plane. It should be noted that the blower 101 blows hot air.

[0028] The coal powder ground by the grinding roller 4 is directed towards the edge of the rotating disk 3 by centrifugal force. The blower 101 delivers hot air through the air pipe 102 to multiple nozzles 103, and the hot air at the multiple nozzles 103 blows the coal powder upward.

[0029] A connection hole 22 is provided on the casing 2, and a glass plate 23 is installed at the connection hole 22. The glass plate 23 is set to facilitate the staff to observe the grinding and feeding of coal blocks inside the casing.

[0030] The implementation principle of a coal mill for an ironmaking plant according to an embodiment of this application is as follows: Coal blocks fall onto a rotating disk 3 through a feed pipe 7. A reducer 11 drives the rotating disk 3 to rotate, and a grinding roller 4 grinds the coal blocks into coal powder. During the rotation of the rotating disk 3, under the action of centrifugal force, the coal powder moves towards the edge of the rotating disk 3. Then, a blower 101 delivers hot air through a blower pipe 102 to multiple nozzles 103. The hot air at the multiple nozzles 103 blows the coal powder upwards, and then the coal powder is delivered to the discharge pipe 8 through a separator 6. The striking component 9 on the discharge pipe 8 strikes the discharge pipe 8, causing the coal powder adhering to the inner wall of the discharge pipe 8 to fall off and be delivered to the storage tank, achieving the effect of saving time and labor.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coal mill for an ironmaking plant, characterized in that: The machine includes a base (1), a housing (2), a rotating disk (3), a grinding roller (4), a pressure frame (5), a separator (6), a feed pipe (7), a discharge pipe (8), and a striking assembly (9) mounted on the discharge pipe (8). The housing (2) is mounted on the top of the base (1), and the rotating disk (3) is rotatably mounted on the top of the base (1) via a reducer (11). A main unit (12) is mounted on the reducer (11), and an air supply is installed around the rotating disk (3). The assembly (10) includes a pressure frame (5) installed inside the housing (2), a grinding roller (4) installed at the bottom of the pressure frame (5), the grinding roller (4) abutting against the top of the rotating disk (3), a separator (6) installed at the top of the housing (2), a feed pipe (7) penetrating the outer wall of the housing (2) and extending to the top of the rotating disk (3), a discharge pipe (8) installed at the top of the separator (6), and a striking assembly (9) installed on the outer wall of the discharge pipe (8).

2. The coal mill for ironmaking plants according to claim 1, characterized in that: The striking assembly (9) includes an electric telescopic rod (91), a connecting rod (92), and a striking hammer (93). The electric telescopic rod (91) is fixedly installed on the outer wall of the discharge pipe (8). The connecting rod (92) is fixedly installed on the output end of the electric telescopic rod (91). The striking hammer (93) is fixedly installed on the connecting rod (92) and abuts against the outer wall of the discharge pipe (8).

3. A coal mill for an ironmaking plant according to claim 2, characterized in that: The striking hammer (93) is a rubber striking hammer (93).

4. A coal mill for an ironmaking plant according to claim 2, characterized in that: The outer wall of the discharge pipe (8) is fitted with a connecting pipe (81), and the inner wall of the connecting pipe (81) is fitted with sound insulation cotton (811).

5. A coal mill for an ironmaking plant according to claim 1, characterized in that: The air supply assembly (10) includes a blower (101), an air supply pipe (102), and a plurality of nozzles (103). The blower (101) is installed inside the base (1). One end of the air supply pipe (102) is connected to the blower (101), and the other end is wrapped around the rotating disk (3). The plurality of nozzles (103) are equidistantly installed at the top of the air supply pipe (102).

6. A coal mill for an ironmaking plant according to claim 5, characterized in that: The housing (2) is equipped with a support plate (21) for placing the air supply pipe (102), and the support plate (21) and the rotating disk (3) are located on the same horizontal plane.

7. A coal mill for an ironmaking plant according to claim 1, characterized in that: The housing (2) has a connection hole (22), and a glass plate (23) is installed at the connection hole (22).

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