A crushing device for high-ash coal reducing agent pretreatment

Abstract

The utility model and coal crushing equipment technical field, concrete relate to a kind of for high ash coal reducing agent pretreatment's crushing device, it is applicable to the crushing processing of high ash coal in metallurgy, chemical industry and other industries.The utility model provides a kind of for high ash coal reducing agent pretreatment's crushing device, including crushing box, the inside of crushing box is sequentially provided with primary crushing mechanism, middle crushing mechanism and fine crushing mechanism from top to bottom;The outside of crushing box is wrapped with soundproof cover;The top of crushing box is provided with feed hopper, and feed hopper is correspondingly arranged with primary crushing mechanism, and the bottom of feed inlet is provided with feed regulating valve;The bottom of crushing box is provided with discharge port, and screen is provided above the discharge port.

Description

Technical Field

[0001] This utility model relates to the technical field of coal crushing equipment, specifically to a crushing device for pretreatment of high-ash coal with reducing agent, which is suitable for crushing and processing high-ash coal in industries such as metallurgy and chemical engineering. Background Technology

[0002] High-ash coal reducing agent is a special type of coal used in metallurgical reduction reactions. It has a high ash content (typically >25%) but still possesses strong reducing power, making it suitable for processes such as direct reduction of iron ore and non-ferrous metal smelting. Because high-ash coal is hard, has poor brittleness, and its ash content easily generates dust during crushing, it requires pretreatment to achieve a suitable particle size (typically <5mm) to improve reaction efficiency and reduce energy consumption.

[0003] Currently, crushing devices for high-ash coal reducing agents, such as jaw crushers and hammer crushers, are difficult to adapt to the hardness of high-ash coal. Short crushing times can easily lead to insufficient crushing, while long crushing times can exacerbate equipment wear. At the same time, single-stage crushing methods cannot guarantee the uniformity of coal particle size, and large coal particles need to be crushed repeatedly, which affects the effect of subsequent reduction reactions. Utility Model Content

[0004] The purpose of this invention is to provide a crushing device for the pretreatment of high-ash coal with reducing agent, so as to solve the problems of long crushing time and uneven crushing in existing crushing devices.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is a crushing device for pretreatment of high ash coal reducing agent, including a crushing box, wherein a primary crushing mechanism, a secondary crushing mechanism and a fine crushing mechanism are arranged sequentially from top to bottom inside the crushing box.

[0006] The primary crushing mechanism includes a first crushing roller and a second crushing roller that are parallel to each other and spaced apart. The surfaces of the first crushing roller and the second crushing roller are evenly distributed with a plurality of crushing teeth, and the rotation directions of the first crushing roller and the second crushing roller are opposite.

[0007] The intermediate crushing mechanism includes a third crushing roller and an impact plate inclinedly disposed on one side below the third crushing roller. The surface of the third crushing roller is provided with multiple protrusions, and the gap between the impact plate and the third crushing roller gradually decreases from the end closer to the primary crushing mechanism to the end farther away from the primary crushing mechanism.

[0008] The fine crushing mechanism includes a fourth crushing roller and a fifth crushing roller that rotate relative to each other, and the surfaces of the fourth crushing roller and the fifth crushing roller are evenly distributed with fine crushing patterns.

[0009] The crushing chamber is covered with a soundproof cover; a feed hopper is provided on the top of the crushing chamber, and the feed hopper is correspondingly arranged with the primary crushing mechanism; a feed regulating valve is provided at the bottom of the feed hopper; a discharge port is provided at the bottom of the crushing chamber, and a screen is provided above the discharge port.

[0010] As a preferred technical solution of this utility model, the distance between the first crushing roller and the second crushing roller is 8mm-15mm to adapt to the initial crushing of high ash coal and prevent insufficient crushing due to excessive distance or blockage due to insufficient distance.

[0011] As a preferred technical solution of this utility model, the protrusion of the third crushing roller is frustoconical, and the height of the protrusion is 10mm-20mm, and the distance between adjacent protrusions is 15mm-30mm. This protrusion design can more effectively perform secondary crushing on high-ash coal after primary crushing and improve crushing efficiency.

[0012] As a preferred technical solution of this utility model, the gap between the impact plate and the third crushing roller is 20mm-30mm at the end near the primary crushing mechanism and 8mm-15mm at the end far from the primary crushing mechanism. Through the gradually decreasing gap design, the high ash coal is gradually crushed into smaller particles during the intermediate crushing process.

[0013] As a preferred embodiment of this utility model, the distance between the fourth crushing roller and the fifth crushing roller is 2mm-5mm, the depth of the crushing texture is 0.5mm-1.5mm, and the width is 2mm-5mm, which can further finely crush the coal material after intermediate crushing to a suitable particle size.

[0014] As a preferred technical solution of this utility model, the soundproof cover is made of sound-absorbing cotton material, which further reduces the noise generated during equipment operation.

[0015] As a preferred technical solution of this utility model, the screen is inclined at an angle of 15 degrees to 30 degrees and the screen aperture is 2-5 mm. A recycling port is provided on one side of the bottom of the screen. The crushed coal can slide down the screen by its own gravity, while unqualified large coal particles remain on the screen and are discharged from the recycling port for re-crushing, thereby improving the uniformity of product particle size.

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] 1. This crushing device adopts a three-stage crushing structure. By gradually reducing the particle size of the coal, it can reduce the problems of long time and large grinding in the single-stage crushing process. The crushed coal is screened through a screen to ensure that the final product meets the process requirements.

[0018] 2. This crushing device effectively reduces operating noise through a soundproof cover and optimized crushing structure design. Furthermore, by installing a feed regulating valve below the feed hopper, the quantity and amount of feed can be controlled to adapt to different crushing needs. Attached Figure Description

[0019] Figure 1 This utility model discloses the structure of a crushing device for pretreatment of high-ash coal with reducing agent. Figure 1 .

[0020] Figure 2 This utility model discloses the structure of a crushing device for pretreatment of high-ash coal with reducing agent. Figure 2 .

[0021] Figure 3 This is a cross-sectional three-dimensional structural diagram of a crushing device for pretreatment of high-ash coal reducing agent according to this utility model.

[0022] Figure 4 This is a structural diagram of the primary crushing mechanism of a crushing device for pretreatment of high-ash coal reducing agent according to this utility model.

[0023] Figure 5 This is a structural diagram of the intermediate crushing mechanism of a crushing device for pretreatment of high-ash coal reducing agent according to this utility model.

[0024] Figure 6 This is a structural diagram of the fine crushing mechanism of a crushing device for pretreatment of high-ash coal reducing agent according to this utility model.

[0025] As shown in the figure:

[0026] 1. Crushing box; 2. Primary crushing mechanism; 3. Intermediate crushing mechanism; 4. Fine crushing mechanism; 5. First crushing roller; 6. Second crushing roller; 7. Multiple crushing teeth; 8. Third crushing roller; 9. Impact plate; 10. Protrusion; 11. Fourth crushing roller; 12. Fifth crushing roller; 13. Crushing pattern; 14. Recovery port; 15. Feed hopper; 16. Feed regulating valve; 17. Discharge port; 18. Screen. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1:

[0030] As per the instruction manual Figure 1-3 As shown, a crushing device for pretreatment of high ash coal reducing agent includes a crushing box 1, and the interior of the crushing box 1 is provided with a primary crushing mechanism 2, a secondary crushing mechanism 3 and a fine crushing mechanism 4 arranged sequentially from top to bottom.

[0031] In this utility model, the primary crushing mechanism 2 includes a first crushing roller 5 and a second crushing roller 6 that are parallel to each other and spaced apart. The first crushing roller 5 and the second crushing roller 6 rotate in opposite directions. One end of the first crushing roller 5 and one end of the second crushing roller 6 are connected by gear meshing. The other end of the first crushing roller 5 is connected to an electric motor. The electric motor is connected to the first crushing roller 5 through a reducer or pulley.

[0032] In this utility model, the intermediate crushing mechanism 3 includes a third crushing roller 8 and an impact plate 9 inclinedly disposed on one side below the third crushing roller 8. One side of the impact plate 9 is fixedly connected to the inside of the crushing box 1 through multiple brackets. The gap between the impact plate 9 and the third crushing roller 8 gradually decreases from the end closer to the primary crushing mechanism 2 to the end farther away from the primary crushing mechanism 2.

[0033] In this utility model, the fine crushing mechanism 4 includes a fourth crushing roller 11 and a fifth crushing roller 12 that rotate relative to each other. One end of the fourth crushing roller 11 and one end of the fifth crushing roller 12 are connected by gear meshing, and the other end of the fourth crushing roller 11 is connected to an electric motor. The electric motor is connected to the fourth crushing roller 11 by means of a reducer or pulley.

[0034] In this utility model, the crushing box 1 is wrapped with a soundproof cover, which is made of sound-absorbing cotton material to further reduce the noise generated during the operation of the equipment. The top of the crushing box 1 is provided with a feed hopper 15, and the feed hopper 15 is correspondingly provided with the primary crushing mechanism 2. The bottom of the feed hopper 15 is provided with a feed regulating valve 16.

[0035] In this utility model, the bottom of the crushing box 1 is provided with a discharge port 17, and a screen 18 is provided above the discharge port 17. The screen 18 is inclined at an angle of 15 degrees to 30 degrees, and the aperture of the screen 18 is 2 mm to 5 mm. A recovery port 14 is provided on one side of the bottom of the screen 18. The screen 18 is located inside the crushing box 1 and is supported by a support platform. The crushed coal can slide down the screen 18 by its own gravity. The unqualified large particles of coal remain on the screen 18 and are discharged from the recovery port 14 for re-crushing, thereby improving the uniformity of the product particle size.

[0036] As per the instruction manual Figure 4 As shown, the first crushing roller 5 and the second crushing roller 6 are evenly provided with multiple crushing teeth 7. The distance between the first crushing roller 5 and the second crushing roller 6 is 8mm-15mm to adapt to the initial crushing of high ash coal and prevent insufficient crushing due to excessive distance or blockage due to insufficient distance.

[0037] As per the instruction manual Figure 5 As shown, the surface of the third crushing roller 8 is provided with multiple protrusions 10. The protrusions 10 of the third crushing roller 8 are frustoconical in shape, and the height of the protrusions 10 is 10mm-20mm. The distance between adjacent protrusions 10 is 15mm-30mm. This protrusion design can more effectively perform secondary crushing on high-ash coal after primary crushing, thereby improving crushing efficiency. The gap between the impact plate 9 and the third crushing roller 8 is 20mm-30mm at the end near the primary crushing mechanism 2 and 8mm-15mm at the end away from the primary crushing mechanism 2. Through the gradually decreasing gap design, the high-ash coal is gradually crushed into smaller particles during the intermediate crushing process.

[0038] As per the instruction manual Figure 6 As shown, the fourth crushing roller 11 and the fifth crushing roller 12 are evenly distributed with fine crushing patterns 13. The distance between the fourth crushing roller 11 and the fifth crushing roller 12 is 2mm-5mm. The depth of the crushing patterns 13 is 0.5mm-1.5mm and the width is 2mm-5mm, which can further finely crush the coal material after intermediate crushing to a suitable particle size.

[0039] In this invention, high-ash coal enters from the feed hopper 15, and after the flow rate is controlled by the feed regulating valve 16, it passes sequentially through the primary, intermediate, and fine crushing mechanisms 4. The crushed coal is then screened by the screen 18, with qualified coal discharged from the discharge port 17 and unqualified coal returned for re-crushing through the recovery port 14. The entire process is carried out in a closed environment, effectively reducing dust leakage, while the soundproof enclosure reduces noise pollution.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A crushing device for pretreatment of high-ash coal with reducing agent, characterized in that: It includes a crushing box (1), and the interior of the crushing box (1) is provided with a primary crushing mechanism (2), a secondary crushing mechanism (3) and a fine crushing mechanism (4) from top to bottom. The primary crushing mechanism (2) includes a first crushing roller (5) and a second crushing roller (6) that are parallel to each other and spaced apart. The surfaces of the first crushing roller (5) and the second crushing roller (6) are evenly provided with a plurality of crushing teeth (7), and the rotation directions of the first crushing roller (5) and the second crushing roller (6) are opposite. The intermediate crushing mechanism (3) includes a third crushing roller (8) and an impact plate (9) inclinedly disposed on one side below the third crushing roller (8). The surface of the third crushing roller (8) is provided with a plurality of protrusions (10). The gap between the impact plate (9) and the third crushing roller (8) gradually decreases from the end closer to the primary crushing mechanism (2) to the end farther away from the primary crushing mechanism (2). The fine crushing mechanism (4) includes a fourth crushing roller (11) and a fifth crushing roller (12) that rotate relative to each other. The surfaces of the fourth crushing roller (11) and the fifth crushing roller (12) are evenly distributed with fine crushing patterns (13). The crushing box (1) is covered with a soundproof cover; a feed hopper (15) is provided on the top of the crushing box (1), and the feed hopper (15) is correspondingly provided with the primary crushing mechanism (2); a feed regulating valve (16) is provided at the bottom of the feed hopper (15); a discharge port (17) is provided at the bottom of the crushing box (1), and a screen (18) is provided above the discharge port (17).

2. The crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The distance between the first crushing roller (5) and the second crushing roller (6) is 8mm-15mm.

3. The crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The protrusions (10) of the third crushing roller (8) are frustoconical, and the height of the protrusions (10) is 10mm-20mm, and the distance between adjacent protrusions (10) is 15mm-30mm.

4. A crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The gap between the impact plate (9) and the third crushing roller (8) is 20mm-30mm at the end near the primary crushing mechanism (2) and 8mm-15mm at the end away from the primary crushing mechanism (2).

5. A crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The distance between the fourth crushing roller (11) and the fifth crushing roller (12) is 2mm-5mm, and the depth of the crushing texture (13) is 0.5mm-1.5mm and the width is 2mm-5mm.

6. A crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The soundproof cover is made of sound-absorbing cotton material.

7. A crushing device for pretreatment of high-ash coal with reducing agent according to claim 1, characterized in that: The screen (18) is inclined at an angle of 15-30 degrees and the aperture of the screen (18) is 2mm-5mm. A recycling port (14) is provided on one side of the bottom of the screen (18).

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