Zero-ball-spitting ore discharging device of ceramic ball medium ball mill

Abstract

The invention discloses a zero-ball-spitting ore discharging device of a ceramic ball medium ball mill, which comprises a hollow shaft neck and a cylinder body detachably connected with the hollow shaft neck, the inner side of the hollow shaft neck and the inner side of the cylinder body are respectively provided with a reverse spiral blade and a forward spiral blade which are opposite in rotation direction, and a plurality of discharging holes are uniformly distributed in the cylinder body. And the rotating direction of the positive spiral blade is consistent with that of the ceramic ball medium ball mill. By applying the zero-ball-spitting ore discharging device of the ceramic ball medium ball mill, the problems of'ball spitting 'of the ball mill and high working intensity of operators can be effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ore dressing equipment, and in particular relates to a zero-ball-discharging ore discharging device for a ceramic ball medium ball mill, which is suitable for a ceramic ball medium overflow ball mill. Background Art

[0002] In the field of mineral processing, ball mill is a key equipment to achieve full dissociation of mineral particles and meet the requirements of subsequent sorting particle size. It is widely used in the grinding operation of ferrous metal ores, non-ferrous metal ores, and non-metallic ores. This type of grinding mill is equipped with grinding media (such as steel balls, steel bars or gravel, etc.) of a certain grade in its cylinder. When the cylinder rotates at a certain speed around the horizontal axis, the media and raw materials in the cylinder are ejected or rolled down from the inner wall of the cylinder under the action of centrifugal force and friction. As the cylinder reaches a certain height, when its own gravity is greater than the centrifugal force, the ore is crushed due to the impact force. At the same time, during the rotation of the mill, the sliding movement of the grinding media between each other also produces a grinding effect on the raw materials. The ground material is discharged through the hollow shaft neck. According to different discharge methods, it is divided into two types: grid type and overflow type.

[0003] In the stage of fine grinding of minerals, nano ceramic balls are widely used in overflow ball mills as a new energy-saving and efficient grinding medium. In actual production, since the density of nano ceramic balls is nearly half of that of steel balls, it is difficult to achieve the crushing and grinding effect when the same amount of nano ceramic balls is filled with grinding as steel balls. Therefore, it is necessary to ensure a high filling rate of ceramic ball media grinding. When the overflow ball mill is in operation, the grinding media is often discharged together with the material. The use of low-density, high-filling-rate ceramic ball media exacerbates this phenomenon, especially when the mill capacity increases and the actual throughput increases, the "ball spitting" phenomenon becomes more serious. This phenomenon not only reduces the grinding effect and affects the mineral processing indicators, but also causes workers to constantly clean, dribble, and add balls, increasing the intensity of work.

[0004] Therefore, in view of the above problems, it is necessary to provide a zero-ball discharge device for a ceramic ball medium overflow ball mill to ensure the grinding fineness while reducing the labor intensity of on-site workers. Summary of the invention

[0005] The invention provides a ceramic ball medium ball mill zero ball-spitting ore discharging device to solve the problems of "ball-spitting" of the ball mill and high work intensity of operators.

[0006] The technical solution of the present invention to solve the technical problem is as follows:

[0007] According to one aspect of the present application, a zero-ball-discharging discharge device for a ceramic ball medium ball mill is provided, which includes a hollow shaft neck and a cylindrical body detachably connected to the hollow shaft neck, wherein the inner sides of the hollow shaft neck and the cylindrical body are respectively provided with reverse spiral blades and forward spiral blades with opposite rotation directions, and a plurality of discharge holes are evenly distributed on the cylindrical body, and the rotation direction of the forward spiral blades is consistent with the rotation direction of the ceramic ball medium ball mill.

[0008] As a further improvement of the technical solution, the inner diameter of the cylinder is larger than the inner diameter of the hollow shaft neck at the position where the reverse spiral blade is provided.

[0009] As a further improvement of the technical solution, the ends of the hollow shaft neck connected to the cylinder are respectively provided with a shaft neck flange and a cylinder flange, and the shaft neck flange and the cylinder flange are detachably connected and fixed by a plurality of bolts.

[0010] As a further improvement of the technical solution, a sealing gasket is further arranged between the journal flange and the cylinder flange.

[0011] As a further improvement of the technical solution, the discharge hole is a waist-shaped hole or a round hole.

[0012] Compared with the prior art, the ceramic ball medium ball mill zero ball discharge device of the present invention has the following beneficial effects:

[0013] (1) The present invention adopts the method of using positive and negative spiral blades in combination, which not only improves the "ball spitting" phenomenon, but also can return a part of the unqualified particle size materials to the ball mill for re-grinding, thereby ensuring the fineness of the grinding product, and at the same time accelerates the ore discharge process, effectively improving production efficiency.

[0014] (2) The present invention can achieve zero ball discharge in a ball mill, has a simple structure, is easy to install and use, requires little maintenance, and effectively reduces the work intensity and difficulty of on-site workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the arrangement of the discharge holes on the cylinder in the present invention;

[0017] Figure 3 A schematic diagram of one type of discharge hole of the present invention;

[0018] In the figure: 1. Hollow shaft neck; 2. Reverse spiral blades; 3. Shaft neck flange; 4. Cylinder flange; 5. Bolts; 6. Positive spiral blades; 7. Cylinder; 8. Discharge hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present disclosure belongs. "Up", "down", "left", "right", "front", "back" and the like used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. The parts not described in detail in the present invention are all known technologies of technicians in the technical field.

[0020] like Figure 1-3 As shown, the present application provides a zero-ball-discharging discharge device for a ceramic ball medium ball mill, which includes a hollow shaft neck 1 for connecting to the cylinder outlet of the ceramic ball medium ball mill and a cylindrical body 7 detachably connected to the hollow shaft neck 1, and the inner sides of the hollow shaft neck 1 and the cylindrical body 7 are respectively provided with reverse spiral blades 2 and forward spiral blades 6 with opposite rotation directions, and a plurality of discharge holes 8 are evenly distributed on the cylindrical body 7, and the rotation direction of the forward spiral blades 6 is consistent with the rotation direction of the ceramic ball medium ball mill.

[0021] When in use, the ball mill zero-ball-discharging discharge device is connected to the ceramic ball medium ball mill cylinder outlet through the hollow shaft neck 1 by bolts, and rotates synchronously with the ball mill cylinder. The ground materials in the ball mill cylinder enter the ball mill zero-ball-discharging discharge device through the hollow shaft neck 1. Since the rotation direction of the reverse spiral blade 2 is opposite to that of the ball mill, when the slurry passes through this place, the ceramic ball grinding media mixed therein and a part of the unqualified particle size materials with high density and large particle size will be blocked by the reverse spiral blade 2 and return to the ball mill cylinder along the spiral line to continue repeated grinding. The rotation direction of the positive spiral blade 6 in the cylinder 7 is the same as that of the ball mill. When the slurry passes through the cylinder 7, the discharge will be accelerated, and the material will be discharged into the grading operation feed pump pool through the discharge hole 8 on the cylinder 7.

[0022] In this embodiment, the inner diameter of the cylindrical body 7 is larger than the inner diameter of the hollow shaft neck 1 where the reverse spiral blades 2 are provided, so as to improve the slurry discharge effect.

[0023] In this embodiment, the ends of the hollow shaft neck 1 connected to the cylinder 7 are respectively provided with a shaft neck flange 3 and a cylinder flange 4, which are detachably connected and fixed by a plurality of bolts 5, and are convenient to disassemble and assemble, and have a good sealing effect, so that there is no leakage when the slurry flows in the device. In order to further improve the sealing effect of the connection between the shaft neck flange 3 and the cylinder flange 4, a sealing gasket is also provided between the shaft neck flange 3 and the cylinder flange 4.

[0024] In this embodiment, the size and shape of the discharge hole 8 can be flexibly selected according to one's own needs (granularity requirements of grinding operation products, grinding medium size, etc.), and is usually a smooth hole such as a waist-shaped hole or a round hole. Figure 3 A waist-shaped discharge hole 8 is shown, with two sides being semicircles with a diameter of 20 mm and a middle length of 20 mm.

Claims

1. A ceramic ball medium ball mill zero ball discharge device, characterized in that: It comprises a hollow shaft neck (1) and a cylindrical body (7) detachably connected to the hollow shaft neck (1), wherein the inner sides of the hollow shaft neck (1) and the cylindrical body (7) are respectively provided with a reverse spiral blade (2) and a forward spiral blade (6) having opposite rotation directions, and the cylindrical body (7) is evenly distributed with a plurality of discharge holes (8), and the rotation direction of the forward spiral blade (6) is consistent with the rotation direction of the ceramic ball medium ball mill.

2. The zero-ball discharge device for ceramic ball medium ball mill according to claim 1 is characterized in that: The inner diameter of the cylindrical body (7) is larger than the inner diameter of the hollow shaft neck (1) at the position where the reverse spiral blade (2) is provided.

3. The zero-ball discharge device for ceramic ball medium ball mill according to claim 1 is characterized in that: The ends of the hollow shaft neck (1) connected to the cylindrical body (7) are respectively provided with a shaft neck flange (3) and a cylindrical body flange (4); the shaft neck flange (3) and the cylindrical body flange (4) are detachably connected and fixed by a plurality of bolts (5).

4. The zero-ball discharge device for ceramic ball medium ball mill according to claim 1 is characterized in that: A sealing gasket is also provided between the shaft neck flange (3) and the cylinder flange (4).

5. A ceramic ball medium ball mill zero ball discharge device according to any one of claims 1 to 4, characterized in that: The discharge hole (8) is a waist-shaped hole or a round hole.

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