Spiral groove-shaped lifting surface lining plate

Abstract

The invention discloses a spiral groove-shaped lifting surface lining plate and belongs to the technical field of spiral vertical mills. The spiral lining plate assembly comprises two spiral lining plate assemblies which are the same in structure and are symmetrically arranged, the thicknesses of the spiral lining plate assemblies are gradually increased from top to bottom, the two spiral lining plate assemblies are connected with the upper surfaces of double spiral blades on a spiral shaft through connecting assemblies respectively, the thicknesses of the spiral lining plate assemblies are gradually increased from the side of the spiral shaft to the outer side, and the thickness of the spiral lining plate assemblies is gradually increased from top to bottom. A plurality of lifting face grooves are formed in the upper lifting face of the spiral lining plate assembly from top to bottom in the spiral direction. The grinding efficiency can be improved, the service life is longer, and then the overall energy consumption can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of spiral vertical mills, and particularly relates to a spiral groove-shaped lifting surface lining plate. Background Art

[0002] With the increase in energy costs and the decline in ore grades, how to reduce energy consumption, improve grinding efficiency, effectively utilize the contact surface form between grinding medium balls and lining plates to extend the service life of lining plates, reduce the scrap rate of lining plates made of scrap steel, and at the same time obtain higher output has become an urgent issue that equipment manufacturers need to study and solve.

[0003] The main consumable part that needs to be replaced regularly in a spiral vertical mill is the spiral lining plate of the spiral part. The spiral lining plate has a double-spiral structure. Under the agitation of the spiral lining plate, the grinding medium balls, ore materials, and spiral lining plates in the stirring cylinder body come into contact with each other and perform multi-dimensional circular motion and self-rotation motion. By comprehensively using the gravity generated by the grinding medium balls and ore materials and the centrifugal force generated by rotation, impacts, frictions, and shearing actions occur between the grinding medium balls, between the ore materials, and between the medium balls and the ore materials. Under the action of momentum and impulse, the ore materials deform, break, and finally are crushed to reach the ideal particle size. In this process, the spiral lining plate plays a key role as a power source, actively contacting and lifting the grinding medium balls. However, the plane of the current spiral lining plate wears rapidly, and energy consumption will increase after wear. Summary of the Invention

[0004] The present invention aims at the above problems, makes up for the deficiencies of the prior art, and provides a spiral groove-shaped lifting surface lining plate; the present invention can improve grinding efficiency, has a longer service life, and can thereby reduce the overall energy consumption.

[0005] To achieve the above object, the present invention adopts the following technical solutions.

[0006] The present invention provides a spiral groove-shaped lifting surface lining plate, which includes two spiral lining plate assemblies with the same structure and symmetrically arranged. It is characterized in that the thickness of the spiral lining plate assembly gradually increases from top to bottom, and the two spiral lining plate assemblies are respectively connected to the upper surface of the double-spiral blades on the spiral shaft through connecting components. The thickness of the spiral lining plate assembly gradually increases from the side of the spiral shaft to the outside. Multiple lifting surface grooves are arranged on the upper lifting surface of the spiral lining plate assembly from top to bottom along the spiral direction.

[0007] Further, the spiral lining plate assembly is divided into an upper spiral lining plate, a middle spiral lining plate, and a lower spiral lining plate along the spiral direction. The adjacent edges of the upper spiral lining plate, the middle spiral lining plate, and the lower spiral lining plate are closely attached and respectively connected to the spiral blades.

[0008] Further, the lower part of the spiral lining plate assembly is designed into a shovel edge structure to form a cutting edge with a certain thickness.

[0009] Further, a plurality of anti-circulation protrusions are provided on one side of the spiral lining assembly close to the spiral shaft and in the direction of the spiral shaft.

[0010] Further, a plurality of lifting rings are provided upward on the upper surface edge of one side of the spiral lining assembly close to the spiral shaft, and a plurality of replacement lifting holes and mounting holes are provided through the upper and lower surfaces of the spiral lining assembly.

[0011] Advantages of the present invention.

[0012] Due to the existence of the lifting surface grooves in the present invention, the contact range between the grinding medium balls and the lining during the lifting process is increased, so that more materials are ground between the grinding medium balls and the lining in the same time, improving the grinding efficiency; at the same time, due to the blocking of more materials, the metal wear between the grinding medium balls and the lining is reduced, achieving the purpose of extending the service life of the lining and the replacement time of the grinding medium balls. Description of the drawings

[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the material grinding situation of the present invention.

[0016] Markings in the figure: 1 is the spiral blade, 2 is the spiral shaft, 3 is the lifting surface groove, 4 is the upper spiral lining, 5 is the middle spiral lining, 6 is the lower spiral lining, 7 is the shovel edge structure, 8 is the anti-circulation protrusion, 9 is the lifting ring, 10 is the replacement lifting hole, 11 is the mounting hole, 12 is the grinding medium ball, and 13 is the material. Specific embodiments

[0017] As shown in the accompanying drawings, this embodiment provides a spiral groove-shaped lifting surface liner, which includes two spiral liner assemblies with the same structure and symmetric arrangement. The spiral liner assemblies are divided into an upper spiral liner 4, a middle spiral liner 5, and a lower spiral liner 6 along the spiral direction. The adjacent edges of the upper spiral liner 4, the middle spiral liner 5, and the lower spiral liner 6 are closely attached and respectively connected to the spiral blade 1. The design of the segmented spiral liner assembly can reduce the casting difficulty. Moreover, since the lower spiral liner 6 is buried in the lowest layer of the steel ball medium and pulp, it is under great pressure and wears quickly, so its replacement cycle is shorter. The replacement cycle of the middle spiral liner 5 is approximately half a year to one year longer than that of the lower spiral liner 6, and the replacement cycle of the upper spiral liner 4 is approximately half a year to one year longer than that of the middle spiral liner 5. With different replacement cycles for the three sections of the liner, they can be replaced one by one according to the cycle, making the maintenance more convenient.

[0018] While achieving a reasonable replacement cycle, since the spiral liners from top to bottom need to gradually face stronger wear, the thickness of the spiral liner assembly gradually increases from top to bottom. The gradually changing thickness takes into account the longer life of the lower part of the spiral liner assembly, and at the same time, the upper part of the spiral liner assembly is relatively thinner, reducing the overall weight while meeting the wear resistance requirements in actual use, thereby reducing the reactive power loss and equipment cost of the spiral liner assembly.

[0019] The two spiral liner assemblies are respectively connected to the upper surface of the double spiral blade 1 on the spiral shaft 2 through connection components. The thickness of the spiral liner assembly gradually increases from the side of the spiral shaft 2 to the outside. Since the linear velocity of the outer edge of the spiral liner is the largest and the wear is the most serious, it needs to be the thickest, while the linear velocity gradually decreases towards the axis radiation and the wear weakens, so it does not need to be so thick, and a thinning design is made to avoid waste.

[0020] The lower part of the spiral liner assembly is designed into a shovel edge structure 7, forming a blade edge with a certain thickness, which is convenient for efficiently and labor-savingly shoveling up the grinding medium balls 12 and reducing the power consumption during shoveling the balls.

[0021] On the upper lifting surface of the spiral liner assembly, a plurality of lifting surface grooves 3 are arranged along the spiral direction from top to bottom. The grinding medium balls 12 and the material 13 are stirred and lifted by the lifting surface and the lifting surface grooves 3 of the liner. The material 13 sandwiched between the grinding medium balls 12 and the lifting surface grooves 3 is ground. Since the arc-shaped structure of the grooves increases the contact between the grinding medium balls 12 and the lifting surface grooves 3, more material 13 is ground to the expected particle size, improving the grinding efficiency and the output of the mill. At the same time, the metal wear of the spiral liner assembly and the grinding medium balls 12 is reduced, and the spare part replacement cost is lowered.

[0022] On the side of the spiral liner assembly close to the spiral shaft 2, a plurality of anti-circulation protrusions 8 are arranged towards the spiral shaft 2, blocking the grinding medium balls 12 and the pulp rising along the curve on the shaft side, effectively avoiding the wear of the weld between the blade and the shaft here and protecting the shaft matrix.

[0023] On the upper surface edge of the spiral liner assembly near one side of the spiral shaft 2, a plurality of lifting rings 9 are provided upward for lifting the new liner during installation. Since the lifting rings 9 will be worn out during use, in order to lift the liner during replacement later, a plurality of replacement lifting holes 10 are provided through the upper and lower surfaces of the spiral liner assembly.

[0024] In addition, mounting holes 11 are provided through the upper and lower surfaces of the spiral liner assembly for connecting the spiral liner assembly to the spiral blade 1 below through a connecting component.

[0025] The working principle of this application: The spiral blade 1 and the spiral shaft are in a welded relationship. During the rotation of the spiral shaft, the spiral liner assembly rotates. The grinding medium balls 12 and the material 13 are stirred and lifted by the liner lifting surface and the lifting surface grooves 3. The grinding medium balls 12 interact with the lifting surface grooves 3, so that the material 13 sandwiched between the grinding medium balls and the lifting surface grooves 3 is ground. Since the arc structure of the grooves increases the contact between the grinding medium balls 12 and the liner lifting surface grooves 3, more material 13 is ground to the expected particle size, improving the grinding efficiency and the output of the mill. At the same time, the metal wear of the spiral liner and the grinding medium balls 12 is reduced, and the spare part replacement cost is reduced. The material 13 is ground and carried to the high position of the entire spiral liner assembly under the rotation of the spiral liner assembly, and then discharged through the overflow port of the mill and enters the next process.

[0026] It can be understood that the above specific description of the present invention is only for illustrating the present invention and is not limited by 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 equivalently replaced to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A spiral groove-shaped lifting surface liner, comprising two spiral liner assemblies with the same structure and symmetrically arranged, characterized in that, The thickness of the spiral liner assembly gradually increases from top to bottom. The two spiral liner assemblies are respectively connected to the upper surface of the double spiral blades (1) on the spiral shaft through connecting components. The thickness of the spiral liner assembly gradually increases from the spiral shaft to the outside. A plurality of lifting surface grooves (3) are arranged on the upper lifting surface of the spiral liner assembly from top to bottom along the spiral direction.

2. The helical groove-shaped lifting surface liner according to claim 1, characterized in that, The spiral liner assembly is divided into an upper spiral liner (4), a middle spiral liner (5) and a lower spiral liner (6) along the spiral direction. The adjacent edges of the upper spiral liner (4), the middle spiral liner (5) and the lower spiral liner (6) are closely attached and respectively connected to the spiral blades (1).

3. The spiral groove-shaped lifting surface liner according to claim 1, characterized in that, The lower part of the spiral liner assembly is designed into a shovel edge structure (7) to form an edge with a certain thickness.

4. A spiral groove-shaped lifting surface liner according to claim 1, characterized in that, A plurality of anti-circulation protrusions (8) are arranged on the spiral liner assembly in the direction of the spiral shaft on the side close to the spiral shaft.

5. The helical groove-shaped lifting surface liner according to claim 1, characterized in that A plurality of lifting rings (9) are arranged upward on the upper surface edge of the spiral liner assembly on the side close to the spiral shaft. A plurality of replacement lifting holes (10) and mounting holes (11) are arranged through the upper and lower surfaces of the spiral liner assembly.

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