CN207769910U - A kind of twin-stage grinding ball mill - Google Patents

Abstract

The utility model discloses a two-stage grinding ball mill, which can grind various ores and other grindable materials, and comprises a support and a rotatable cylinder arranged above the support. The cylinder includes the first grinding chamber and the second grinding chamber with steel balls inside. The second grinding chamber is sleeved outside the first grinding chamber. Both ends of the cylinder are connected with end caps through flanges. The end cover is respectively provided with a material inlet and a material outlet, the material inlet is connected to the first grinding chamber, the material outlet is connected to the second grinding chamber, and is closed with the first grinding chamber, and a ladder is attached to the inner wall of the first grinding chamber A wear-resistant liner, and the first grinding bin is provided with material screening holes along its circumferential direction, and a corrugated wear-resistant liner is attached to the inner wall of the second grinding bin. The two-stage grinding ball mill of the utility model improves the grinding precision of materials and has high grinding efficiency.

Description

A two-stage grinding ball mill

technical field

The utility model relates to the technical field of grinding for grinding tool preparation, in particular to a special ball mill.

Background technique

The special ball mill is the key equipment for crushing the abrasive crystal blocks in the preparation of abrasive tools, and then crushing them to meet the required particle size. Dry or wet grinding of various grindable materials. The ball mill is generally composed of a feeder, a rotary part, a transmission part and a classification part. The rotary part is a cylinder with a wear-resistant lining inside. The rotation produces centrifugal force, which brings the steel ball to a certain height and then falls freely, causing heavy impact and grinding on the material, and the ground material is discharged from the discharge port. The ball mill in the prior art has low grinding precision for ore and other materials, resulting in a large amount of sandback, long grinding time, and low grinding efficiency.

Utility model content

The utility model aims to solve one of the above-mentioned technical problems to a certain extent.

In view of this, the utility model provides a double-stage grinding ball mill, which improves the grinding precision of materials and has high grinding efficiency.

In order to solve the above technical problems, the utility model provides a two-stage grinding ball mill, which includes a support and a rotatable cylinder arranged above the support, the end of the cylinder is connected with a drive mechanism, and the cylinder includes The first grinding bin and the second grinding bin are equipped with steel balls inside, the second grinding bin is sleeved outside the first grinding bin, and the two ends of the cylinder are connected with end caps through flanges, so The end caps at both ends of the cylinder are respectively provided with a feed port and a discharge port, the feed port communicates with the first grinding chamber, the discharge port communicates with the second grinding chamber, and communicates with the The first grinding bin is closed, the inner wall of the first grinding bin is attached with a stepped wear-resistant liner, and the first grinding bin is provided with material screening holes along its circumferential direction, and the inner wall of the second grinding bin is attached with Wave wear liner.

Further, the stepped wear-resistant liner has a plurality of grooves, a single groove is arranged along the length direction of the first grinding chamber, and multiple grooves are arranged along the length of the first grinding chamber. The circumferential direction is evenly spaced apart.

Further, the material screening holes are evenly spaced apart along the length direction of the groove portion.

Further, the steel balls in the first grinding chamber and the second grinding chamber both include a first steel ball and a second steel ball, and the diameter of the second steel ball is smaller than that of the first steel ball.

Further, the diameter of the material screening hole is smaller than the diameter of the steel ball.

Further, a material deflector is connected between the end of the second grinding bin and the discharge port.

Further, an elbow feeding part is provided at the feeding port.

Further, the cylinder surface is provided with inspection holes, and the inspection holes include a first inspection hole arranged near the feed inlet and a second inspection hole arranged near the discharge outlet, and the first inspection hole is and the second inspection hole are arranged on the same straight line.

Further, the first grinding chamber and the second grinding chamber are welded by steel plates.

The technical effect of the utility model is: according to a kind of two-stage grinding ball mill of the utility model, the two-stage grinding ball mill comprises a rotatable cylinder, the cylinder comprises a first grinding bin and a second grinding bin, and the second grinding bin covers It is located outside the first grinding chamber, and the driving mechanism is activated to make the first grinding chamber and the second grinding chamber rotate simultaneously. The material to be ground enters the first grinding chamber from the feeding port, and the steel balls in the first grinding chamber Under the joint action of centrifugal force, the material rolls and collides with the material, and the material is initially ground to realize the rough processing of the material. When the material is ground into smaller particles, it can fall into the second grinding chamber from the material screening hole. , so as to reduce unnecessary grinding in the first grinding chamber, improve the grinding efficiency of the first grinding chamber, and finely grind the materials with smaller particles screened out from the first grinding chamber in the second grinding chamber, thereby improving the grinding of materials High precision, the material finished by the second grinding chamber is discharged from the discharge port. The double-stage grinding ball mill of the utility model realizes graded grinding, with high grinding precision and high grinding efficiency.

Description of drawings

Fig. 1 is a schematic structural view of a two-stage grinding ball mill according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a barrel according to an embodiment of the present invention.

Among them, 1-support; 2-cylinder; 3-driving mechanism; 4-end cover; 5-inlet; 6-outlet; 7-ladder wear-resistant lining; Wear-resistant liner; 21-first grinding bin; 22-second grinding bin; 23-material deflector; 51-bend pipe feeding part; 71-groove part.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

As shown in Figure 1 and Figure 2, the utility model provides a two-stage grinding ball mill, including a support 1 and a rotatable cylinder 2 arranged above the support 1, the cylinder 2 is in the shape of a long cylinder, and the cylinder 2. The end is connected with a drive mechanism 3. The cylinder 2 includes a first grinding chamber 21 and a second grinding chamber 22 with steel balls inside. The second grinding chamber 22 is set outside the first grinding chamber 21. The cylinder 2 The two ends of the cylinder are connected with end caps 4 through flanges, and the end caps 4 at both ends of the cylinder body 2 are respectively provided with a feed port 5 and a discharge port 6, the feed port 5 communicates with the first grinding chamber 21, and the discharge port 6 It communicates with the second grinding chamber 22 and is closed with the first grinding chamber 21. The inner wall of the first grinding chamber 21 is attached with a stepped wear-resistant lining plate 7, and the first grinding chamber 21 is provided with material screening along its circumferential direction. hole, the second grinding chamber 22 inner wall is attached with a corrugated wear-resistant liner 9.

According to a double-stage grinding ball mill of the present invention, the double-stage grinding ball mill includes a rotatable cylinder body 2, the cylinder body 2 includes a first grinding chamber 21 and a second grinding chamber 22, and the second grinding chamber 22 is sleeved on the second grinding chamber. Outside the first grinding bin 21, start the driving mechanism 3, the first grinding bin 21 and the second grinding bin 22 can be rotated at the same time, the material to be ground enters the first grinding bin 21 from the feed port 5, and the first grinding bin 21 Under the joint action of gravity and centrifugal force, the steel ball rolls along with the material and hits the material to perform preliminary grinding on the material to realize rough processing of the material. When the material is ground into smaller particles, it can fall from the material screening hole into the first stage. In the second grinding bin 22, thereby reducing the unnecessary grinding of small particle materials in the first grinding bin 21, improving the grinding efficiency of the first grinding bin 21, the smaller particle materials screened out from the first grinding bin 21 are in the second grinding bin 21. Fine grinding is carried out in the grinding chamber 22, thereby improving the grinding precision of the material, and the material after finishing in the second grinding chamber 22 is discharged from the discharge port 6. The double-stage grinding ball mill of the utility model realizes graded grinding, and the grinding precision is high , and high grinding efficiency.

Specifically, the material is loaded into the barrel 2 from the feed port 5 of the double-stage grinding ball mill. When the barrel 2 of the ball mill rotates, the steel ball (that is, the grinding body) is attached to it due to inertia, centrifugal force, and friction. It is taken away by the cylinder 2 on the liner of the cylinder 2, and when it is brought to a certain height, it is thrown down due to its own gravity, and the falling steel ball (that is, the grinding body) is like a projectile. The material in the body 2 is crushed.

The stepped wear-resistant liner 7 and the wave-shaped wear-resistant liner 9 are all made of wear-resistant materials, and the stepped wear-resistant liner 7 and the wave-shaped wear-resistant liner 9 have improved the wear resistance of the first grinding chamber 21 and the second grinding chamber 22 inner walls respectively. Wear resistance, and improve the grinding efficiency of the grinder.

As shown in FIG. 2 , the stepped wear-resistant liner 7 has a plurality of grooves 71, a single groove 71 is arranged along the length direction of the first grinding chamber 21, and the plurality of grooves 71 are arranged along the length of the first grinding chamber 21. Evenly spaced in the circumferential direction, the stepped wear-resistant liner 7 is conducive to the attachment of the steel balls and improves the grinding efficiency of the steel balls.

According to a specific embodiment of the present invention, the material screening holes are evenly spaced along the length direction of the groove portion 71, thereby improving the grinding efficiency of the steel balls.

According to a specific embodiment of the present utility model, the steel balls in the first grinding chamber 21 and the second grinding chamber 22 all include a first steel ball and a second steel ball, and the diameter of the second steel ball is smaller than the diameter of the first steel ball , the first steel ball and the second steel ball are mixed, the second steel ball is filled in the gap of the first steel ball, the big steel ball has a greater impact force, which can improve the grinding efficiency of the material, and the small steel ball is filled in the big steel ball In the gap between the balls, the contact area between the material and the steel ball is larger, and the grinding accuracy of the material is improved.

According to a specific embodiment of the utility model, the diameter of the material screening hole is smaller than that of the steel ball, which prevents the steel ball from being thrown out of the material screening hole and ensures normal grinding of the steel ball.

As shown in FIG. 1 , a material deflector 23 is connected between the end of the second grinding bin 22 and the discharge port 6 , so that the finely ground material is discharged from the discharge port 6 , making the material discharge more smoothly.

As shown in Figure 1, there is an elbow feeding part 51 at the feeding port 5, since the opening of the feeding port 5 is facing one side of the cylinder body, it is more troublesome to add materials, and the opening of the elbow feeding part 51 faces upwards, which is convenient Filling material into the elbow feeding part 51 facilitates filling material from the feeding port 5 into the barrel 2, improves the efficiency of material addition, shortens the processing time, and improves the grinding efficiency.

As shown in Figure 1, the surface of the cylinder body 2 is provided with an inspection hole 8, the inspection hole 8 includes a first inspection hole arranged near the feed inlet 5 and a second inspection hole arranged near the discharge outlet 6, the first inspection hole and The second inspection hole is arranged on the same straight line. When it is necessary to inspect the inside of the cylinder 2, the first inspection hole and the second inspection hole can be rotated to a suitable position to inspect the inside of the cylinder 2. The first inspection hole If the second inspection hole is arranged on the same straight line, the cylinder body 2 only needs to be rotated once, which reduces the number of rotations of the cylinder body 2 and makes maintenance more convenient.

According to a specific embodiment of the utility model, the first grinding bin 21 and the second grinding bin 22 are welded by steel plates, thereby improving the rigidity and strength of the outer walls of the first grinding bin 21 and the second grinding bin, thereby improving the service life of the ball mill.

According to a specific embodiment of the present invention, the driving mechanism 3 includes a driving motor, a speed reducer and a transmission mechanism, and the transmission mechanism can be a transmission gear or a pulley.

According to a kind of two-stage grinding ball mill of the present invention, its working principle is as follows:

Start the drive mechanism 3 to make the first grinding bin 21 and the second grinding bin 22 rotate simultaneously;

Send the material to be ground into the first grinding bin 21 from the feeding port 5 along the elbow feeding part 51, close the feeding port 5, and the steel balls in the first grinding bin 21 are under the joint action of inertial force, centrifugal force and gravity. Next, the material rolls together with the material and hits the material, and the material is initially ground to realize the rough processing of the material. When the material is ground into smaller particles, it can fall into the second grinding chamber 22 from the material screening hole;

The steel balls in the second grinding bin 22 impact the smaller particles screened out from the first grinding bin 21 to achieve fine grinding;

The material finished by the second grinding bin 22 flows along the material deflector 23 to the discharge port 6, and is discharged from the discharge port 6;

After the grinding of the material is completed, the operation of the driving mechanism is stopped.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (8)

1. A two-stage grinding ball mill, characterized in that it comprises a support and a rotatable cylinder disposed above the support, the end of the cylinder is connected with a drive mechanism, and the cylinder includes an internal The first grinding chamber and the second grinding chamber of the steel ball, the second grinding chamber is sleeved outside the first grinding chamber, the two ends of the cylinder are connected with end caps through flanges, and the two ends of the cylinder are The end cover at the end is respectively provided with a feed port and a discharge port, the feed port communicates with the first grinding chamber, the discharge port communicates with the second grinding chamber, and communicates with the first grinding chamber. The bin is closed, the inner wall of the first grinding bin is attached with a stepped wear-resistant lining, and the first grinding bin is provided with material screening holes along its circumferential direction, and the inner wall of the second grinding bin is attached with a corrugated wear-resistant lining plate, the stepped wear-resistant liner has a plurality of grooves, a single groove is arranged along the length direction of the first grinding chamber, and a plurality of grooves are arranged along the length of the first grinding chamber The circumferential direction is evenly spaced apart. 2 . The two-stage ball mill according to claim 1 , wherein the material screening holes are evenly spaced apart along the length direction of the groove portion. 3 . 3. A kind of double-stage grinding ball mill according to claim 1, characterized in that, the steel balls in the first grinding chamber and the second grinding chamber all comprise first steel balls and second steel balls, and the The diameter of the second steel ball is smaller than that of the first steel ball. 4. A two-stage grinding ball mill according to claim 1, characterized in that the diameter of the material screening hole is smaller than the diameter of the steel ball. 5. A two-stage grinding ball mill according to claim 1, characterized in that, a material deflector is connected between the end of the second grinding chamber and the discharge port. 6 . The two-stage grinding ball mill according to claim 1 , wherein an elbow feeder is provided at the feed inlet. 7 . 7. A two-stage grinding ball mill according to claim 1, wherein an inspection hole is provided on the surface of the cylinder, and the inspection hole includes a first inspection hole arranged near the feed inlet and a first inspection hole arranged near the The second inspection hole provided at the discharge port, the first inspection hole and the second inspection hole are arranged on the same straight line. 8. The two-stage grinding ball mill according to claim 1, wherein the first grinding chamber and the second grinding chamber are welded by steel plates.