Vertical mill for crushing superfine slag powder

Abstract

The utility model aims to provide a vertical mill for crushing superfine slag powder, which comprises a mill, a feeding pipe is inserted into the side wall of the mill, a distributing component is arranged at the bottom of the feeding pipe, a first clamping cavity is formed between a discharging pipe and a conical circular ring, and a second clamping cavity is formed between the conical circular ring and a millstone. The utility model relates to the technical field of mining equipment, which is characterized in that a distributing component is arranged at the bottom of a feeding pipe, so that mineral aggregate flowing out of the feeding pipe is distributed through a first clamping cavity and a second clamping cavity, one part of mineral aggregate is uniformly distributed on a grinding disc through the first clamping cavity, and the other part of mineral aggregate enters a conical circular ring through the second clamping cavity; and the materials are uniformly distributed under the action of the conical ring and then fall onto the millstone. Due to the design, mineral aggregates are distributed and uniformly distributed before entering the grinding disc, and then are mixed, so that the distribution uniformity of the mineral aggregates on the grinding disc is greatly improved. The problem that in the prior art, mineral aggregate is not evenly distributed on the surface of the grinding disc is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine equipment technical field, concretely is a kind of mill slag micro powder smashing vertical mill. BACKGROUND

[0002] The mill slag vertical mill can effectively grind slag, limestone, coal and other materials. The device integrates crushing, drying, grinding and grading functions, and is a key equipment for mill slag micro powder processing.

[0003] The existing mill slag vertical mill has certain technical problems in the discharging process. Specifically, the ore material flows out of the discharge pipe and directly falls onto the grinding disc. Due to the outlet position of the discharge pipe and the flow rate of the ore material, the ore material concentrates on the apex position of the grinding disc. Although it will scatter during the sliding process, it will still cause uneven distribution of the ore material on the surface of the grinding disc. However, it is still difficult to achieve the ideal uniform distribution effect, resulting in insufficient contact pressure of the grinding roller in some areas and the ore material, thereby reducing the grinding effect. This not only affects the quality of the product, but also can cause uneven wear of the grinding roller and the grinding disc, shorten the service life of the equipment and increase the maintenance cost.

[0004] Therefore, how to improve the discharging system of the mill slag vertical mill to achieve uniform distribution of the ore material on the grinding disc has become a problem to be solved. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a mill slag micro powder smashing vertical mill, which solves the problem of uneven distribution of the ore material flowing into the existing mill slag vertical mill on the grinding disc, resulting in insufficient contact pressure of the grinding roller in some areas and the ore material.

[0006] To achieve the above-mentioned purpose, the utility model realizes the following technical scheme: a mill slag micro powder smashing vertical mill, comprising a mill and a grinding disc arranged in the mill, a grinding roller is arranged at the edge of the grinding disc, a feeding pipe is inserted into the side wall of the mill, the bottom of the feeding pipe is suspended above the center of the grinding disc, a distribution assembly is arranged at the bottom of the feeding pipe, the distribution assembly comprises a discharge pipe connected to the bottom of the feeding pipe and a conical ring arranged below the discharge pipe, a first clamping cavity is formed between the discharge pipe and the conical ring, and a second clamping cavity is formed between the conical ring and the grinding disc.

[0007] Preferably, the top of the conical ring is provided with a feeding nozzle; the first clamping cavity comprises a discharging gap formed between the feeding nozzle and the discharge pipe.

[0008] Preferably, the bottom of the discharge pipe is provided with a lower horn mouth; the first clamping cavity further comprises a first gap formed between the lower horn mouth and the conical ring.

[0009] Preferably, the feeding nozzle and the discharge pipe are coaxial.

[0010] Preferably, the wall surface of the conical annular ring is a first inclined surface and a second inclined surface which are inclined downward from the center to the edge, the first inclined surface forms an angle a with the horizontal line, and the second inclined surface forms an angle β with the horizontal line, wherein a < β.

[0011] Preferably, the second clamping cavity comprises a second gap, and the upper and lower spacing of the second gap gradually decreases from the center to the edge.

[0012] Preferably, an upper horn mouth is arranged at the connection between the top of the discharging pipe and the feeding pipe, and the large opening of the upper horn mouth is connected to the feeding pipe.

[0013] Preferably, a screen is arranged in the circumferential direction of the upper horn mouth.

[0014] Preferably, an elastic connecting piece is arranged between the lower horn mouth and the conical annular ring, the elastic connecting piece comprises a base body arranged at the top of the conical annular ring, and the top of the base body is connected to the lower horn mouth through a spring.

[0015] Preferably, the elastic connecting piece further comprises a sleeve body arranged at the bottom of the lower horn mouth, the base body is inserted into the sleeve body, and a sealing ring is arranged between the base body and the sleeve body.

[0016] Beneficial effects

[0017] By using the vertical mill for crushing slag micro-powder, the feeding pipe is provided with a material distribution assembly at the bottom, so that the mineral material flowing out of the feeding pipe is distributed through the first clamping cavity and the second clamping cavity, a part of the mineral material is uniformly distributed on the grinding disc through the first clamping cavity, and another part of the mineral material enters the conical annular ring through the second clamping cavity and is uniformly distributed under the action of the conical annular ring and then falls onto the grinding disc. Such a design allows the mineral material to be distributed and uniformly treated before entering the grinding disc, and then mixed, thereby greatly improving the uniformity of the distribution of the mineral material on the grinding disc. The problem of uneven distribution of the mineral material on the surface of the grinding disc in the prior art is effectively solved. During the rotation of the grinding disc, the grinding roller can be in contact with the mineral material which is uniformly distributed in the circumferential direction of the grinding disc, thereby improving the grinding effect of the grinding roller. This not only improves the quality of the product, but also reduces the wear of the grinding roller and the grinding disc, prolongs the service life of the equipment, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the mill of the utility model;

[0019] Figure 2 It is a structure schematic view of the material distribution assembly of the utility model;

[0020] Figure 3 It is a structure schematic view of the elastic connecting piece of the utility model.

[0021] Explanation of symbols in the diagram

[0022] 1. Mill, 2. Feed pipe, 3. Grinding roller, 4. Grinding disc, 5. Upper bell mouth, 6. Material drop gap, 7. First gap, 8. Second gap, 9. Screen, 10. Feed pipe, 11. Feed nozzle, 12. Lower bell mouth, 13. Conical ring, 131. First inclined surface, 132. Second inclined surface, 14. Elastic connector, 141. Outer sleeve, 142. Spring, 143. Base, 144. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present invention 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 invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0024] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0025] Reference Figures 1-3 The slag micro-powder vertical mill of this embodiment is described below. In the prior art, a vertical mill includes a mill 1 and a grinding disc 4 disposed inside the mill 1, with grinding rollers 3 disposed at the edge of the grinding disc 4. A feed pipe 2 is inserted into the side wall of the mill 1, and the bottom of the feed pipe 2 is suspended above the center of the grinding disc 4.

[0026] In this embodiment, such as Figure 2 As shown, a material distribution component is provided at the bottom of the feed pipe 2 to evenly distribute the ore flowing out of the feed pipe 2 onto the grinding disc 4, so that the ore can flow evenly downwards during the subsequent operation of the grinding disc 4, so that the grinding roller 3 can contact the ore evenly around the grinding disc 4 when it rotates, thereby improving the grinding effect of the grinding roller 3.

[0027] In a preferred embodiment, the material distribution assembly includes a discharge pipe 10 connected to the bottom of the feed pipe 2 and a conical ring 13 disposed below the discharge pipe 10. A first cavity is formed between the discharge pipe 10 and the conical ring 13, and a second cavity is formed between the conical ring 13 and the grinding disc 4. After falling from the feed pipe 2, the ore is diverted into the first and second cavities. The diverted ore does not accumulate. The two streams of ore fall along the surfaces of the conical ring 13 and the grinding disc 4, respectively. When a portion of the ore flows out through the first cavity, it flows and is evenly distributed on the surface of the conical ring 13, and then falls back onto the grinding disc 4, mixing with the other portion of evenly distributed ore on the grinding disc 4.

[0028] In a preferred embodiment, the top of the conical ring 13 is provided with a feed nozzle 11, which is hollow; the aforementioned first clamping cavity includes a discharge gap 6, which is formed between the feed nozzle 11 and the discharge pipe 10. After the ore flows out of the feed pipe 2, part of the ore enters the feed nozzle 11, and the other part enters the discharge gap 6 between the feed nozzle 11 and the discharge pipe 10, thereby diverting the falling ore to form two streams of ore.

[0029] Preferably, the bottom of the feed pipe 10 is provided with a lower flared opening 12; the first clamping cavity also includes a first gap 7, formed between the lower flared opening 12 and the conical ring 13. The lower flared opening 12 is used to block the ore flowing in the first gap 7, so that when the ore falling into the first gap 7 jumps downward, it is blocked by the inner wall surface of the lower flared opening 12, so that the ore in the first gap 7 is quickly and stably spread on the outer wall surface of the conical ring 13.

[0030] In this embodiment, the feed nozzle 11 is coaxial with the feed tube 10.

[0031] In this embodiment, as Figure 3 As shown, the wall of the conical ring 13 consists of a first inclined surface 131 and a second inclined surface 132 that slope downwards from the center to the edge. When the ore flows downwards within the first gap 7, it first passes through the gentle slope of the first inclined surface 131, and then the second inclined surface 132 accelerates the falling speed of the ore, thereby accelerating the uniform distribution of the ore during its rapid descent. For example, the first inclined surface 131 forms an angle α with the horizontal line, and the second inclined surface 132 forms an angle β with the horizontal line, where α < β. For example, α is preferably 20°-25°, and β is preferably 30°-40°.

[0032] Further preferably, the second clamping cavity includes a second gap 8, and the second gap 8 is affected by the first inclined surface 131 and the second inclined surface 132, such that the vertical distance of the second gap 8 gradually decreases from the center to the edge. For example, the distance between the first inclined surface 131 and the grinding disc 4 is greater than the distance between the second inclined surface 132 and the grinding disc 4.

[0033] In a preferred embodiment, an upper flared opening 5 is provided at the connection between the top of the feed pipe 10 and the feed pipe 2, with the large opening of the upper flared opening 5 connected to the feed pipe 2. A screen 9 is arranged circumferentially around the upper flared opening 5. The inverted flared design of the upper flared opening 5 allows powdery mineral powder in the ore sliding down the feed pipe 2 to flow directly out through the screen 9. After flowing out, it falls onto the surface of the lower flared opening 12. During this process and in subsequent flow processes, it is carried directly upward by the strong air blown from bottom to top inside the mill 1, so that the mineral powder contained in the feed pipe 2 is directly screened out, reducing the process of it flowing again on the grinding disc 4.

[0034] In a preferred embodiment, an elastic connector 14 is provided between the lower flared opening 12 and the conical ring 13, so that the conical ring 13 is elastically connected to the feed pipe 10. Affected by the vibration of the mill 1 itself and the vibration force during the falling of the ore, the conical ring 13 is continuously in a state of micro-vibration, so as to facilitate the rapid and uniform distribution of the ore on the surface of the conical ring 13. It should be noted that, in one exemplary embodiment, there are multiple elastic connectors 14, which divide the first gap 7 into several intervals.

[0035] Specifically, such as Figure 3 As shown, the elastic connector 14 includes a spring 142. Furthermore, to prevent the ore flowing on the surface of the conical ring 13 from contacting the spring 142 and affecting its elastic operation, a base 143 is provided at the top of the conical ring 13, and the spring 142 is connected to the top of the base 143 and the lower flared end 12, so that the ore flows out along the base 143.

[0036] Furthermore, the elastic connector 14 also includes an outer sleeve 141 located at the bottom of the lower flared opening 12. The base 143 is inserted into the outer sleeve 141, so that the spring 142 is located within the outer sleeve 141, protecting the spring 142 and preventing mineral particles from contacting the spring. Secondly, a sealing ring 144 is also provided between the base 143 and the outer sleeve 141 to seal the gap between the outer sleeve 141 and the base 143.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical mill for grinding micro-fine slag powder, comprising a mill and a grinding disc arranged in the mill, wherein a grinding roller is arranged at the edge of the grinding disc, and a feeding pipe is inserted into the side wall of the mill, and the bottom of the feeding pipe is suspended above the center of the grinding disc, characterized in that: The bottom of the feeding pipe is provided with a distribution assembly, which comprises a discharging pipe connected to the bottom of the feeding pipe and a conical ring arranged below the discharging pipe, a first clamping cavity is formed between the discharging pipe and the conical ring, and a second clamping cavity is formed between the conical ring and the grinding disc. ​ 2. The vertical mill for pulverizing a slag fine powder according to claim 1, characterized by: The top of the conical ring is provided with a feeding nozzle. The first clamping cavity comprises a discharging gap formed between the feeding nozzle and the discharging pipe.

3. The vertical mill for grinding of microfine slag powder according to claim 2, characterized in that: The bottom of the discharging pipe is provided with a lower horn mouth. The first clamping cavity further comprises a first gap formed between the lower horn mouth and the conical ring.

4. The vertical mill for grinding of microfine slag powder according to claim 2, characterized in that: The feeding nozzle is coaxial with the discharging pipe.

5. The vertical mill for grinding of microfine slag powder according to claim 1, characterized in that: The wall surface of the conical ring is a first inclined surface and a second inclined surface which are inclined downward from the center to the edge, an included angle α is formed between the first inclined surface and the horizontal line, and an included angle β is formed between the second inclined surface and the horizontal line, wherein α < β.

6. The vertical mill for grinding of microfine slag powder according to claim 1, characterized in that: The second clamping cavity comprises a second gap, and the upper and lower spacing of the second gap gradually decreases from the center to the edge.

7. The vertical mill for grinding of microfine slag powder according to claim 6, characterized in that: The top of the discharging pipe is provided with an upper horn mouth at the connection position with the feeding pipe, and the large opening of the upper horn mouth is connected to the feeding pipe.

8. The vertical mill for grinding of microfine slag powder according to claim 7, characterized in that: A screen is arranged in the circumferential direction of the upper horn mouth.

9. The vertical mill for grinding of microfine slag powder according to claim 3, characterized in that: An elastic connecting piece is arranged between the lower horn mouth and the conical ring, the elastic connecting piece comprises a base body arranged at the top of the conical ring, and the top of the base body is connected to the lower horn mouth through a spring.

10. The vertical mill for grinding of microfine slag powder according to claim 9, characterized in that: The elastic connecting piece further comprises an outer sleeve arranged at the bottom of the lower horn mouth, the base body is inserted into the outer sleeve, and a sealing ring is arranged between the base body and the outer sleeve.

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