Feeding structure of rod mill

Abstract

The utility model discloses a feeding structure of a rod mill, which comprises a material receiving part and a feeding part detachably connected below the material receiving part, and the material receiving part comprises a material receiving pipe; the feeding part comprises a transition pipe connected with the lower end of the material receiving pipe, one side of the transition pipe is in through connection with a feeding pipe which is obliquely arranged downwards, and the outlet end of the feeding pipe extends into the rod mill; the lower portion of the inlet end of the feeding pipe is connected with a buffering part coaxial with the transition pipe, the upper portion of the buffering part is communicated with the transition pipe and the feeding pipe, the lower portion of the buffering part is closed, and a buffering layer is arranged in the buffering part. And a flushing pipe communicated with the transition pipe is arranged on the opposite side of the feeding pipe. The wear-resistant buffer type feeding structure of the flushing pipe realizes the function of continuously and smoothly conveying materials for a long time; by changing the structure of the feeding casting elbow and arranging the buffer layer and the flushing pipe, smooth conveying of materials is guaranteed, and meanwhile the abrasion-resistant degree of the feeding structure is increased.

Description

Technical Field

[0001] The utility model relates to a rod mill feeding structure and belongs to the technical field of chemical metallurgical equipment. Background Art

[0002] Wet rod mill is an important equipment for grinding ore in the raw material process of Bayer process alumina production. It is divided into a feed part, a cylinder part, a discharge part and a driving mechanism. It is generally produced in the form of a feed part conveying ore and a discharge part conveying slurry. The feeding device of the feed part is generally a cast elbow style.

[0003] Since the elbow changes the direction of the material, the elbow is often washed by the ore, resulting in damage and leakage, poor material transportation, and affecting the operation of the equipment. For a long time, the wear of the cast elbow was irregular, and the only way to ensure smooth material transportation was to replace the cast elbow. Each replacement of the cast elbow required a long shutdown, which reduced production efficiency and was time-consuming and labor-intensive. At the same time, when the material was blocked, it was manually unblocked to ensure normal material transportation. Utility Model Content

[0004] The utility model aims to provide a rod mill feeding structure to solve the technical problem that the casting elbow wears and leaks during the rod mill feeding process and needs frequent shutdown for replacement.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A rod mill feeding structure comprises a material receiving portion and a feeding portion detachably connected below the material receiving portion, the material receiving portion comprises a material receiving pipe; the feeding portion comprises a transition pipe connected to the lower end of the material receiving pipe, one side of the transition pipe is connected through a feeding pipe arranged obliquely downward, the outlet end of the feeding pipe extends into the interior of the rod mill; a buffer portion coaxially arranged with the transition pipe is connected to the lower part of the inlet end of the feeding pipe, the upper part of the buffer portion is connected to the transition pipe and the feeding pipe, the lower part of the buffer portion is closed, and a buffer layer is arranged in the buffer portion; a flushing pipe is connected through the transition pipe on the opposite side of the feeding pipe.

[0007] Therefore, the utility model connects a buffer portion coaxially arranged with the transition pipe to the lower part of the inlet end of the feeding pipe, so that the outlet end of the receiving pipe, the transition pipe and the buffer portion are on the same axis. When the material enters the feeding structure, a part of the material moving vertically downward will directly contact the buffer layer of the buffer portion, and the potential energy of the buffered material will be reduced. Then, the material will be mixed with the liquid sprayed from the flushing pipe and move into the rod mill in the feeding pipe. By setting the buffer portion, the material is prevented from directly scouring the bottom wall of the feeding pipe (the turning point of the traditional casting elbow), the service life is increased, and at the same time, a large amount of material is prevented from being concentrated and accumulated at the turning point.

[0008] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0009] In order to achieve a better material buffering effect and avoid material accumulation in the buffer part, in a specific embodiment, the buffer layer is fixedly connected to the inner wall of the buffer part, the top of the buffer layer is flush with the top of the buffer part, and the buffer layer is a filler arranged inside the buffer part.

[0010] The material will still flush the inner walls of the connecting pipe, transition pipe and feeding pipe during the movement. In a specific embodiment, the inner walls of the connecting pipe, transition pipe and feeding pipe are all provided with a wear-resistant bimetallic layer.

[0011] In order to further reduce the potential energy of the falling material, in a specific embodiment, the cross section of the receiving pipe is inverted trapezoidal, and the inner diameter of the receiving pipe gradually decreases from top to bottom. Since the inner diameter of the receiving pipe gradually decreases from top to bottom, the material is buffered for the first time in the receiving pipe, and after entering the feeding part, it is buffered for the second time in the buffer part.

[0012] Specifically, a square first flange is provided at the upper part of the material receiving pipe, a circular second flange is provided at the lower part of the material receiving pipe, and a circular third flange connected to the second flange is provided at the upper part of the transition pipe; a fourth flange for connecting to a flushing liquid storage tank is provided at one end of the flushing pipe extending outward.

[0013] Specifically, the transition pipe and the feeding pipe, the transition pipe and the flushing pipe, and the buffer portion and the feeding pipe are all connected and fixed by welding.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) The rod mill feeding structure of the utility model solves the problem that the cast elbow wears and leaks during the rod mill feeding process and requires frequent shutdown and replacement. The wear-resistant buffer feeding structure with a flushing pipe designed by the utility model can realize the function of long-term continuous and smooth material transportation. The utility model changes the structure of the cast feeding elbow, arranges a buffer layer and a flushing pipe, ensures smooth material transportation, and increases the wear resistance of the feeding structure, so as to avoid various injury accidents caused by leakage of the cast feeding elbow during the rod mill feeding process.

[0016] 2) The rod mill feeding structure of the utility model reduces the possibility of wear and tear of scouring parts such as elbows, improves the scouring and wear resistance of the feeding structure, and has the characteristics of simple structure, reliable performance, simple maintenance, safety and reliability, and is suitable for promotion and application.

[0017] 3) The feeding structure of the rod mill of the utility model is simple in structure. The wear-resistant bimetallic material is used to replace the original Q345 cast elbow. The combined structure of the material receiving part and the feeding part is used to replace the original cast elbow. By adding a flushing pipe, the conveyed material is flushed to prevent material accumulation and blockage, so that the material in the feeding part of the rod mill can be smoothly conveyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] In the figure

[0020] 1-first flange; 2-material receiving pipe; 3-second flange; 4-third flange; 5-transition pipe; 6-buffer part; 7-flushing pipe; 8-fourth flange; 9-feeding pipe; 10-buffer layer. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0022] like Figure 1 As shown, the feeding structure of the rod mill of this embodiment includes a material receiving portion and a feeding portion detachably connected to the bottom of the material receiving portion, the material receiving portion includes a material receiving pipe 2, the cross-section of the material receiving pipe 2 is an inverted trapezoid, and the inner diameter of the material receiving pipe 2 gradually decreases from top to bottom; the feeding portion includes a transition pipe 5 connected to the lower end of the material receiving pipe 2, one side of the transition pipe 5 is connected through a feeding pipe 9 arranged obliquely downward, the outlet end of the feeding pipe 9 extends into the interior of the rod mill, and a flushing pipe 7 is connected through the transition pipe 5 on the opposite side of the feeding pipe 9, and the inner walls of the material receiving pipe 2, the transition pipe 5 and the feeding pipe 9 are all provided with wear-resistant bimetallic layers.

[0023] A buffer portion 6 coaxially arranged with the transition pipe 5 is connected to the lower part of the inlet end of the feeding pipe 9, the upper part of the buffer portion 6 is communicated with the transition pipe 5 and the feeding pipe 9, the lower part of the buffer portion 6 is closed, and a buffer layer 10 is arranged in the buffer portion 6; the buffer layer 10 is fixedly connected to the inner wall of the buffer portion 6, and the top of the buffer layer 10 is flush with the top of the buffer portion 6. In this embodiment, the buffer layer 10 can be made of elastic shock-absorbing and energy-absorbing fillers, such as EVA, PE, CR, PU foam, PORON, D3O, ACF, etc.

[0024] A square first flange 1 is provided at the upper portion of the material receiving pipe 2, a circular second flange 3 is provided at the lower portion of the material receiving pipe 2, and a circular third flange 4 connected to the second flange 3 is provided at the upper portion of the transition pipe 5; a fourth flange 8 for connecting to a flushing liquid storage tank is provided at one end of the flushing pipe 7 extending outward, and welding is used to connect and fix the transition pipe 5 to the feeding pipe 9, between the transition pipe 5 and the flushing pipe 8, and between the buffer portion 6 and the feeding pipe 9.

[0025] The upper square first flange 1 and the lower circular second flange 3 are connected to the receiving pipe 2 by welding, the upper circular third flange 4 is connected to the receiving pipe 2 by welding, the transition pipe 5, the buffer part 6, and the feeding pipe 9 are connected together by welding, the buffer part 6 and the feeding pipe 9 are opened at the interface and welded to the flushing pipe 7, the flushing pipe 7 and the fourth flange 8 are connected together by welding, the buffer part 6 is filled with filler to form a buffer layer 10, and the receiving part and the feeding part are lined with a layer of wear-resistant bimetal of a certain thickness.

[0026] The rod mill feeding structure of this embodiment eliminates the elbow that is easy to wear, adds a conical material receiving box, a buffer box, and a flushing pipe structure, and reduces the possibility of wear and tear of the elbow and other scouring parts. At the same time, the utility model adopts a wear-resistant bimetal lining to replace the Q345 cast elbow, which improves the scouring and wear resistance of the feeding structure, and has the characteristics of simple structure, reliable performance, and simple maintenance; it is suitable for various material grinding equipment, especially for wet rod mills suitable for alumina raw material processes, replacing the original Q345 cast elbow feeding device.

[0027] In actual application, the material receiving part is connected and fixed with the lower hopper through a square flange, the feeding part is connected with the material receiving part through a round flange, and the feeding box is extended into the rod mill, and the flushing pipe flange is connected with the flushing liquid storage tank, so that the rod mill material can be transported. During the material transportation process, it is necessary to adjust the liquid flow in the flushing pipe to achieve a reasonable liquid-solid ratio to ensure smooth material transportation. At the same time, regularly check the damage of the buffer in the buffer box and replenish or replace it in time.

[0028] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.

Claims

1. A rod mill feeding structure, comprising a receiving portion and a feeding portion detachably connected below the receiving portion, characterized in that: The material receiving portion comprises a material receiving pipe (2); the material feeding portion comprises a transition pipe (5) connected to the lower end of the material receiving pipe (2), one side of the transition pipe (5) being connected through a feed pipe (9) arranged obliquely downward, the outlet end of the feed pipe (9) extending into the interior of the rod mill; A buffer portion (6) coaxially arranged with the transition pipe (5) is connected to the lower part of the inlet end of the feed pipe (9); the upper part of the buffer portion (6) is in communication with the transition pipe (5) and the feed pipe (9); the lower part of the buffer portion (6) is sealed; a buffer layer (10) is arranged in the buffer portion (6); and a flushing pipe (7) is connected to the transition pipe (5) on the opposite side of the feed pipe (9).

2. The rod mill feeding structure according to claim 1, characterized in that: The buffer layer (10) is fixedly connected to the inner wall of the buffer portion (6), and the top of the buffer layer (10) is flush with the top of the buffer portion (6).

3. The rod mill feeding structure according to claim 2, characterized in that: The buffer layer (10) is a filler arranged inside the buffer portion (6).

4. The rod mill feeding structure according to claim 1, characterized in that: The inner walls of the receiving pipe (2), the transition pipe (5) and the feeding pipe (9) are all provided with a wear-resistant bimetallic layer.

5. The rod mill feeding structure according to claim 1, characterized in that: The cross section of the material receiving pipe (2) is in the shape of an inverted trapezoid, and the inner diameter of the material receiving pipe (2) gradually decreases from top to bottom.

6. The rod mill feeding structure according to claim 1, characterized in that: The upper portion of the material receiving pipe (2) is provided with a square first flange (1), the lower portion of the material receiving pipe (2) is provided with a circular second flange (3), the upper portion of the transition pipe (5) is provided with a circular third flange (4) connected to the second flange (3); and the end of the flushing pipe (7) extending outward is provided with a fourth flange (8) for connecting to a flushing liquid storage tank.

7. The rod mill feeding structure according to any one of claims 1 to 6, characterized in that: The transition pipe (5) and the feed pipe (9), the transition pipe (5) and the flushing pipe (7), and the buffer portion (6) and the feed pipe (9) are all connected and fixed by welding.

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