CN201168623Y - centrifugal mill - Google Patents

Abstract

A centrifugal pulverizer, including a casing, a transmission wheel, a transmission shaft, a feed hopper, and a discharge port. The annular partition plate divides the casing into two parts, the crushing cavity and the grinding cavity. The bowl-shaped cavity in the crushing cavity The crushing rotor body is set in the cavity of the annular compartment plate, and is fixedly connected with the power shaft. There is a gap between the bowl-shaped crushing rotor body and the annular compartment plate; The impeller rotor is set in the middle of the grinding chamber and fixedly connected with the power shaft. The upper part of the grinding chamber communicates with the crushing chamber. There is an air inlet hole at the bottom of the grinding chamber. tube connection. The centrifugal mill of the utility model is a kind of equipment that organically integrates crushing and grinding, and can simultaneously complete five production processes such as medium, fine crushing, coarse grinding, fine grinding, and powder selection, which greatly simplifies the process of crushing and grinding. The technological process saves investment in equipment and industrial buildings, and at the same time reduces energy consumption. It has a compact structure and is easy to maintain.

Description

centrifugal mill

technical field

The utility model relates to material crushing and grinding mechanical equipment, in particular to a centrifugal pulverizer.

Background technique

So far, the crushing and grinding operations of materials cannot be organically combined, and can only be realized by the segmented crushing process of multi-stage crushing and ball milling. Existing types of crushers, such as jaw crushers, hammer crushers, cone crushers, etc., use extrusion, bending, splitting, and impact forces to crush materials, and they cannot crush large pieces of materials to Particle size below 1 mm or smaller. The ball mills widely used in the industry are all horizontal cylindrical grinding cylinder structures. Considering that the medium in the grinding cylinder rotates too fast, the medium will be in a centrifugal state and lose the grinding and peeling effect. The grinding cylinder generally rotates around its own horizontal axis. Rotating at a slow speed, the grinding efficiency is low. When the feed particle size is larger than 10-20 mm, the production efficiency of the ball mill decreases and the energy consumption increases. Therefore, at present, all metallurgical mines, cement building materials, chemical ceramics and other enterprises must adopt multi-stage crushing (coarse crushing, medium crushing, fine crushing), and then grind the finely crushed materials into a ball mill to finally obtain fine particle size. This multi-stage crushing and grinding process requires a lot of investment, low efficiency, a large floor space, a large amount of equipment maintenance, and poor economic benefits.

Contents of the invention

The purpose of this utility model is to provide a centrifugal powder that organically combines centrifugal impact crushing and centrifugal powerful ball milling, has large impact force, high grinding and peeling force, and can crush bulk materials to micro-nano and nano-scale particle sizes at one time. mill.

The centrifugal pulverizer of the present utility model includes a casing, a transmission wheel, a transmission shaft, a feed hopper and a discharge port. The lining plate forms a polygonal structure, the feeding hopper is connected to the crushing chamber through the screw feeder, the discharge port is connected to the top of the crushing chamber, and there are grading impeller blades installed at the discharge port, and the bowl-shaped crushing rotor body in the crushing chamber is arranged in an annular In the cavity of the compartment plate, it is fixedly connected with the power shaft. There is a hammer on the surface of the bowl-shaped crushing rotor body. There is a gap between the bowl-shaped crushing rotor body and the annular compartment plate; the inner wall of the grinding chamber is lined by an upper arc plate and the lower arc-shaped liner, the concave ring impeller rotor is set in the middle of the grinding chamber, and is fixedly connected with the power shaft, the concave ring impeller rotor is cast with radial blades, and the side wall of the grinding chamber is provided with The material hopper is connected with the feeding port, and the grinding medium (such as steel balls, gravel) enters the grinding chamber from the media hopper and the feeding port. The upper part of the grinding chamber communicates with the crushing chamber, and the bottom of the grinding chamber is opened with The air hole and the air inlet are connected with the air inlet pipe, and the lower end of the power shaft is connected with the motor through the transmission wheel.

The working principle of the centrifugal pulverizer of the utility model is: after the material is sent into the crushing cavity by the feeding hopper through the screw feeder, it is hit by the hammer on the bowl-shaped crushing rotor body rotating at high speed, and is obliquely crushed under the action of centrifugal force. The material is thrown out in the direction of the crushing chamber and collides with the polygonal liner on the inner wall of the crushing chamber. The material is strongly impacted and crushed through collision and rebound, and circulates and impacts in the crushing chamber until its particle size is smaller than that of the bowl-shaped crushing rotor body and the ring-shaped compartment plate. When there is a gap between them, it will drop from the gap to the grinding chamber. The media (steel balls) and materials in the grinding chamber are thrown out by the centrifugal force under the action of the blades of the grinding impeller, and slide and roll along the inner wall of the grinding chamber to a certain height and then fall down. At the same time, the materials and media are subjected to Under the action of the tangential force of the grinding rotor, it also makes a tangential movement, and the combined movement of the material and the medium is a three-dimensional spiral movement. smash. Due to the strong agitation of the grinding rotor blades, under the action of centrifugal force and tangential force of the blades, the medium undergoes forced helical precession movement, the medium also has self-rotation, slippage with the inner wall, grinding and peeling, and the impact of steel balls and balls Grinding with the ball can grind the material into nanometer and sub-nanometer micropowder. The finely ground fine powder enters the crushing cavity along the gap between the bowl-shaped crushing rotor body and the annular compartment plate under the action of the wind force of the inlet pipe and the air inlet hole, and is discharged out of the machine from the discharge port through the classifying impeller blades.

The centrifugal mill of the utility model is a kind of equipment that organically integrates crushing and grinding, and can simultaneously complete five production processes such as medium, fine crushing, coarse grinding, fine grinding, and powder selection, which greatly simplifies the process of crushing and grinding. The technological process saves investment in equipment and industrial buildings, and at the same time reduces energy consumption. It has a compact structure and is easy to maintain.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

A centrifugal pulverizer, comprising a casing 1, a transmission wheel 2, a power shaft 17, a feed hopper 9 and a discharge port 10, and an annular compartment plate 16 divides the casing 1 into a crushing chamber 13 and a grinding chamber 6 Two parts, the inner wall of the crushing chamber 13 is composed of a liner 12 in a polygonal structure, which is made into a regular polygonal structure for the convenience of processing. In the same way, the grading impeller blade 11 is installed at the outlet 10, the bowl-shaped crushing rotor body 15 in the crushing chamber 13 is set in the cavity of the annular compartment plate 16, and is fixedly connected with the power shaft 17, and the bowl-shaped crushing rotor body 16 There is a hammer 14 on the surface, and there is a gap 22 between the bowl-shaped crushing rotor body 15 and the annular compartment plate 16; the inner wall of the grinding chamber 6 is composed of an upper arc-shaped lining plate 18 and a lower arc-shaped lining plate 21. The ring body impeller rotor 19 is arranged in the middle of the grinding chamber 6 and is fixedly connected with the power shaft 17. The concave ring body impeller rotor 19 is cast with radial blades. There is a feeding port on the side wall of the grinding chamber 6. The medium hopper 7 and The feeding port is connected, and the grinding medium 5 enters the grinding chamber 6 from the medium hopper 7 and the feeding port. 4 is connected with the air inlet pipe 3, and the lower end of the power shaft 17 is connected with the motor through the transmission wheel 2.

When the machine stops for some reason and needs to be restarted, due to the presence of steel balls and materials in the grinding chamber, the starting resistance of the impeller rotor 19 of the concave ring body increases greatly, making it difficult to start the unit. Therefore, the upper circular arc of the inner wall of the grinding chamber 6 The shaped liner 18 is designed as a block splicing split structure, which has fixed and movable ones. A sliding seat 20 is set on the outer side of the casing 1, and the movable upper arc-shaped liner 18 can be drawn out and moved to the sliding seat 20. . Before the unit stops, the movable upper arc-shaped liner 18 is pulled out and moved to the sliding seat 20, and the steel balls are thrown out under the action of centrifugal force and stored in the sliding seat 20 to reduce the resistance of the power shaft 17; , push back the movable upper arc-shaped liner 18 to its original position, and push the stored steel balls into the grinding chamber 6 .

Claims (4)

1, a kind of centrifugal grinder, comprise casing (1), drive (2), line shaft (17), feed hopper (9) and discharging opening (10), it is characterized in that: annular separate space plate (16) will be divided into crusher chamber (13) and grinding chamber (6) two parts in the casing (1), crusher chamber (13) inwall is formed polygonized structure by liner plate (12), feed hopper (9) links to each other with crusher chamber (13) by screw feeder (8), discharging opening (10) communicates with crusher chamber (13) top, bowl-type broken rotor body (15) in the crusher chamber (13) is located in the cavity of annular separate space plate (16), affixed with line shaft (17), bowl-type broken rotor body (16) surface is provided with hammer (14), leave gap (22) between bowl-type broken rotor body (15) and annular separate space plate (16), grinding chamber (6) inwall is made up of last circular arc liner plate (18) and following circular arc liner plate (21), recessed torus vane rotor (19) is arranged on middle part, grinding chamber (6), affixed with line shaft (17), have material inlet on the sidewall of grinding chamber (6), medium hopper (7) links to each other with material inlet, the top in grinding chamber (6) communicates with crusher chamber (13), bottom, grinding chamber (6) has fresh air inlet (4), fresh air inlet (4) is connected with blast pipe (3), and the lower end of line shaft (17) links to each other with motor by drive (2).

2, centrifugal grinder according to claim 1 is characterized in that: discharging opening (10) locates to be equipped with classifying turbine blade (11).

3, centrifugal grinder according to claim 1 is characterized in that: be cast with radial blade on the recessed torus vane rotor (19).

4, centrifugal grinder according to claim 1 is characterized in that:, the last circular arc liner plate (18) of grinding chamber (6) inwall is that block splicing divides body structure.

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