CN116727057A - Tower mill - Google Patents

Abstract

The invention relates to the technical field of ore grinding equipment in industries such as mines, cement, metallurgy and the like, in particular to a tower type mill. The technical problems that the bottom space of the grinding cylinder body of the tower type grinding machine cannot be utilized, the grinding efficiency is low, the starting torque is large, the spiral lining plate is frequently replaced, and the gravity classification effect is poor are solved. Comprises a conical base, a main stirring shaft, an auxiliary stirring shaft, a foundation, an ore grinding cylinder, a grading overflow cylinder and a driving system; the classifying overflow cylinder is positioned above the ore grinding cylinder, and a stirring structure is arranged in the ore grinding cylinder and consists of a main stirring shaft and an auxiliary stirring shaft; and the stirring structure is driven to rotate by a driving system; and a conical base is arranged below the ore grinding cylinder body.

Description

A tower mill

Technical field

The invention relates to the technical field of grinding equipment in mining, cement, metallurgy and other industries, and in particular, to a tower mill.

Background technique

At present, tower mills are mainly used in fine grinding operations in mining, cement, metallurgy and other industries, and can replace ball mills as two-stage or three-stage grinding equipment. Compared with ball mills, tower mills have the characteristics of simple structure, small floor space, high energy utilization, low loss of media balls, and uniform product distribution. They have been widely recognized by the industry and have broad market application prospects.

In the prior art, the two shovel shoe linings at the bottom of the spiral mixing shaft of the tower mill need to be at a certain distance from the bottom of the grinding barrel so that the spiral mixing shaft can be removed during maintenance. In addition, the bottom plate of the grinding barrel can also be protected from damage. Due to wear and tear, media balls and materials will accumulate in this part of the space. If the media balls and materials accumulate for a long time, they will become hardened. It is difficult to remove this part of materials and media balls during liner replacement and maintenance. In addition, this part of the area is a non-grinding area. , which will also cause a waste of space in this part of the tower mill.

When the tower mill is started, the two shovel shoe liners at the bottom of the spiral mixing shaft are the first to scoop up the material and media balls at the bottom of the grinding barrel. Therefore, the front edges and edges of the shovel shoe liners are prone to wear and need to be replaced regularly. In addition, the starting torque and starting current of the mill are also relatively large, which will cause a certain impact on the equipment and the power grid at the user's location every time it is started.

In the prior art, the tower mill is continuously stirred by the spiral stirring shaft, and the media balls collide and scrub with each other to finely grind the material slurry. The ground material particles move upward and leave the mixing area through the fixed overflow at the upper part of the tower mill. When the tower mill is discharged from the square port, part of the large particle materials can also fall back to the grinding area to continue grinding. Although there is a certain gravity classification effect, the classification effect is not obvious.

Therefore, in response to the above problems, developing a new high-efficiency tower mill with high grinding efficiency, high space utilization, long service life of spiral liner, low starting torque and good classification effect has always been a new topic that needs to be solved urgently.

Contents of the invention

The present invention aims to provide a tower mill in view of the shortcomings of the prior art. It solves the technical problems of unavailable space at the bottom of the grinding cylinder of the tower mill, low grinding efficiency, large starting torque, frequent replacement of spiral liner, and poor gravity classification effect.

In order to achieve the above object, the present invention adopts the following technical solution, including a conical base, a main stirring shaft, an auxiliary stirring shaft, a foundation, a grinding cylinder, a grading overflow cylinder and a driving system; the grading overflow cylinder is located in the grinding mill. Above the ore cylinder, a stirring structure is provided in the grinding cylinder. The stirring structure is composed of a main stirring shaft and a auxiliary stirring shaft; and the stirring structure is driven to rotate by a driving system. A cone-shaped base is provided below the grinding cylinder.

Further, the main stirring shaft includes a main shaft and a lining plate; the auxiliary stirring shaft includes a auxiliary shaft and a tapered lining plate; the main stirring shaft and the auxiliary stirring shaft are connected through shaft end flanges and bolts, and the lower plane of the lining plate at the bottom of the main stirring shaft It completely fits the flat surface on the tapered lining of the auxiliary stirring shaft. The auxiliary stirring shaft is at the bottom and the main stirring shaft is at the top. It is placed vertically in the center of the grinding cylinder. The main stirring shaft and the driving system are connected through the shaft end flange and bolts.

Further, the cone-shaped base includes a cone and a cone-shaped magnetic wear-resistant lining; the cone is provided with a backup ball release port and a flushing port, and the backup ball release port is directed downward, and the cone-shaped magnetic wear-resistant lining is inlaid with On the inner surface of the cone, the auxiliary stirring shaft is placed in the center of the conical base, and the outer spiral surface of the conical lining plate coincides with the surface of the conical magnetic wear-resistant lining body (no interference).

Further, the ore grinding cylinder includes a cylinder body, and the cylinder body is provided with a feed port, a ball adding port, an inspection door and a ball releasing port.

Further, the graded overflow cylinder includes a graded cylinder; the graded cylinder includes two parts: a shrinking tapered portion and an upright portion; a circumferential spiral overflow groove is provided outside the upright portion.

Further, the grinding cylinder is seated on two foundations.

Further, close the access door, the medium balls are fed through the ball opening of the grinding cylinder, and the material slurry is fed through the feeding port of the grinding cylinder. When the drive system is working, the main stirring shaft and the auxiliary stirring shaft rotate together, The medium ball inside the stirring grinding cylinder and the cone-shaped base performs multi-dimensional circular motion, capturing large particles in the material slurry for fine grinding. The ground material moves upward into the shrinking cone surface of the classification overflow cylinder, continues to rise, and enters classification. The upright part of the overflow cylinder is overflowed, and finally the small-particle materials overflow outward along the upper edge of the upright part of the classification cylinder, enter the spiral overflow tank, and flow out of the tower mill, while the large-particle materials return to the grinding cylinder under the action of their own gravity. Continue grinding in the body grinding area.

Compared with the prior art, the present invention has beneficial effects.

1. The present invention can make full use of the bottom area of the grinding barrel of the tower mill, changing the area where the media balls and materials are accumulated and hardened into a usable grinding area. In addition, it is provided with a cone inlaid with a conical magnetic wear-resistant lining inside. It has a shaped base and a conical grinding area, which increases the processing capacity of the tower mill under the same specifications and improves the grinding efficiency of the tower mill.

2. The tapered lining plate used in the auxiliary mixing shaft of the present invention replaces the shovel shoe lining plate at the bottom of the existing spiral mixing shaft, which can greatly reduce the starting torque of the tower mill, reduce the wear of the lining plate, and eliminate the need for frequent maintenance of the lining plate. Maintenance and replacement.

3. The upper grading area of the present invention adopts a full overflow structure and is heightened. A spiral chute is set outside to replace the existing overflow square opening structure, and the grading effect is more obvious.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following expressions.

Figure 1 is a schematic diagram of the two-dimensional cross-sectional structure of the present invention.

Figure 2 is a schematic diagram of the three-dimensional structure of the auxiliary stirring shaft of the present invention.

Figure 3 is a schematic diagram of the three-dimensional structure of the main stirring shaft of the present invention.

Figure 4 is a schematic diagram of the three-dimensional structure of the graded overflow cylinder of the present invention.

Figure 5 is a schematic diagram of the three-dimensional structure of the present invention.

In the figure, 1 is the secondary shaft, 2 is the cone, 3 is the spare ball port, 4 is the flushing port, 5 is the conical magnetic wear-resistant lining, 6 is the foundation, 7 is the feed port, and 8 is the material slurry. 9 is the media ball, 10 is the spindle, 11 is the ball port, 12 is the drive system, 13 is the spiral overflow tank, 14 is the graded cylinder, 15 is the cylinder, 16 is the liner, 17 is the tapered liner, 18 is the graded overflow cylinder, 19 is the access door, 20 is the ball release port, 21 is the conical base, 22 is the auxiliary stirring shaft, 23 is the main stirring shaft, and 24 is the grinding cylinder.

Detailed ways

As shown in Figure 1-5, the tower mill includes a conical base 21, a main stirring shaft 23, an auxiliary stirring shaft 22, a foundation 6, a grinding cylinder 24, a graded overflow cylinder 18 and a driving system 12.

Among them, the auxiliary stirring shaft 22 is composed of the auxiliary shaft 1 and the conical lining plate 17, and the conical lining plate 17 is detachable and replaceable. The structural form of the conical (spiral) lining plate 17 is larger in the diameter direction and smaller in the lower part.

The main stirring shaft 23 is composed of the main shaft 10 and the lining plate 16, and the lining plate 16 can also be disassembled and replaced. The lower plane of the bottom lining plate 16 of the main stirring shaft 23 completely fits the upper plane of the tapered lining plate 17 of the auxiliary stirring shaft 22.

The auxiliary stirring shaft 22 and the main stirring shaft 23 are connected through flange bolts at the end of the shaft, and are placed vertically in the center of the grinding cylinder 24.

The upper plane of the tapered lining plate 17 on the auxiliary mixing shaft 22 is completely fit with the lower plane of the bottom lining plate on the main mixing shaft 23. The upper flange of the main mixing shaft 23 is connected to the lower end flange of the drive system 12 shaft through bolts.

The conical base 21 is composed of a cone 2, a backup ball opening 3, a flushing port 4 and a conical magnetic wear-resistant lining 5 embedded inside the cone 2. It is connected and fixed to the bottom plate of the grinding cylinder 24 through flange bolts. .

The grinding cylinder 24 is composed of an access door 19, a cylinder 15, a feed port 7, a ball adding port 11, and a ball releasing port 20. The whole body is seated on the left and right foundations 6.

The classification overflow cylinder 18 is composed of a spiral overflow groove 13 and a classification cylinder 14. The spiral overflow groove 13 is welded to the outer edge of the upright part of the classification cylinder 14 to form an overflow track. The classification overflow cylinder 18 and the grinding cylinder The body 24 is connected through flange bolts and is located on the upper part of the grinding barrel 24; the driving system 12 is arranged on the top of the entire equipment.

When the tower mill is working, the medium balls 9 are fed into the ball-adding port 11, and the material slurry 8 is fed in through the feeding port 7. The drive system 12 starts, driving the main stirring shaft 23 and the auxiliary stirring shaft 22 to rotate together, stirring the medium. The ball 8 performs multi-dimensional circular motion inside the grinding cylinder 24 and the conical base 21 to grind the material slurry 8. As the material slurry 8 is continuously fed from the feed port 7, the material slurry 8 in the grinding cylinder 24 continues to rise. , finally leaves the grinding area, enters the classification overflow cylinder 18, and continuously rises inside the classification cylinder 14 for gravity classification. The coarse-grained material slurry 8 falls back to the grinding area under its own gravity to continue grinding, and the fine-grained material The slurry 8 overflows along the upper edge of the upright part of the classification cylinder 14, enters the spiral overflow tank 13, and is finally discharged from the tower mill.

When the tower mill needs to be inspected and replaced, the media balls 9 and material slurry 8 are discharged through the ball discharge port 20 and the backup ball discharge port 3, the maintenance door 19 is opened, and the conical base 21 is removed, and then the conical lining can be installed. The plate 17 and the lining plate 16 are to be removed and replaced; when the main stirring shaft 23 needs to be removed, the auxiliary stirring shaft 22 is removed first, and then the main stirring shaft 23 is removed.

It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or modified. Equivalent substitutions to achieve the same technical effect; as long as they meet the needs of use, they are all within the protection scope of the present invention.

Claims (7)

1. A tower mill, including a conical base (21), a main stirring shaft (23), an auxiliary stirring shaft (22), a foundation (6), a grinding cylinder (24), and a graded overflow cylinder ( 18) and drive system (12); characterized in that: the graded overflow cylinder (18) is located above the grinding cylinder (24), and a stirring structure is provided in the grinding cylinder (24). The structure is composed of a main stirring shaft (23) and an auxiliary stirring shaft (22); and the stirring structure is driven and rotated by the driving system (12); A cone-shaped base (21) is provided below the grinding cylinder (24). 2. A tower mill according to claim 1, characterized in that: the main stirring shaft (23) includes a main shaft (10) and a lining plate (16); the auxiliary stirring shaft (22) includes a auxiliary shaft ( 1), tapered lining plate (17); the main stirring shaft (23) and the auxiliary stirring shaft (22) are connected through the shaft end flange and bolts, and the lower plane of the lining plate (16) of the main stirring shaft (23) is connected to the auxiliary stirring shaft (22) The upper plane of the conical liner (17) is completely fitted, with the auxiliary stirring shaft (22) at the bottom and the main stirring shaft (23) at the top. They are placed vertically in the center of the grinding cylinder (24), and the main stirring shaft (23) ) is connected to the drive system (12) through the shaft end flange and bolts. 3. A tower mill according to any one of claims 2, characterized in that: the cone-shaped base (21) includes a cone (2), a cone-shaped magnetic wear-resistant lining (5); The body (2) is provided with a spare ball release port (3) and a flushing port (4), and the backup ball release port (3) is directed downward, and the cone-shaped magnetic wear-resistant lining (5) is embedded in the cone (2) On the inner surface, the auxiliary stirring shaft (22) is placed in the center of the conical base (21), and the outer spiral surface of the conical liner (17) matches the surface of the conical magnetic wear-resistant lining (5). 4. A tower mill according to claim 3, characterized in that: the grinding cylinder (24) includes a cylinder (15), and the cylinder (15) is provided with a feed port (7 ), ball-adding port (11), inspection door (19) and ball-releasing port (20). 5. A tower mill according to claim 4, characterized in that: the classification overflow cylinder (18) includes a classification cylinder (14); the classification cylinder (14) includes two parts: a contraction cone. The face and the upright part; the outside of the upright part is provided with a circumferential spiral overflow groove (13). 6. A tower mill according to claim 5, characterized in that the grinding cylinder (24) is seated on two foundations (6). 7. A tower mill according to claim 6, characterized in that: the maintenance door (19) is closed, and the medium ball (9) is fed through the ball port (11) of the grinding cylinder (24), The material slurry (8) is fed through the feed port (7) of the grinding cylinder (24). When the drive system (12) works, the main stirring shaft (23) and the auxiliary stirring shaft (22) rotate together to stir and grind the ore. The medium ball (9) inside the cylinder (24) and the conical base (21) performs multi-dimensional circular motion to capture large particles in the material slurry (8) for fine grinding. The ground material moves upward into the graded overflow cylinder. (18) shrinks the cone surface, continues to rise, and enters the upright part of the classification cylinder (14). Finally, the small particle materials overflow outward along the upper edge of the upright part of the classification cylinder (14), enter the spiral overflow tank (13), and flow out Tower mill, and the large particle materials return to the grinding area of the grinding cylinder (24) under the action of its own gravity to continue grinding.