Vertical stirring ore grinding machine

Abstract

The utility model relates to a vertical stirring ore mill which comprises a barrel and a hollow shaft with a rotating axis extending in the vertical direction, a grinding medium ball is arranged on the inner side of the barrel, a hollow shaft feeding port is formed in the upper end of an inner hole of the hollow shaft, the hollow shaft is driven by a driving device, and a hollow shaft stirring device is arranged on the periphery of the hollow shaft. The lower end of an inner hole of the hollow shaft is a hollow shaft discharging port, a hollow shaft inner cavity spiral blade is arranged in the hollow shaft discharging port, the hollow shaft inner cavity spiral blade is fixed to the inner wall of the hollow shaft, the axis of the hollow shaft inner cavity spiral blade extends in the vertical direction, and a spiral pushing runner used for pushing materials downwards in the rotating process of the hollow shaft is formed between the hollow shaft inner cavity spiral blade and the inner wall of the hollow shaft. The utility model provides the vertical stirring ore grinding machine which can prevent the grinding medium balls from entering the inner hole of the hollow shaft to cause feeding blockage.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball mill equipment, especially a vertical stirring ore mill. BACKGROUND

[0002] The vertical stirring ore mill is short for vertical stirring mill (also called tower mill), which is a high-efficiency superfine ore mill equipment developed by introducing the technology of a domestic famous mining institute, and has been widely applied in fine grinding or regrinding operation in gold mine, silver mine, molybdenum mine, lead-zinc mine, manganese mine, iron mine and nickel mine etc. selection plant, and has played a good effect. Compared with the traditional ball mill, it has the outstanding characteristics of energy saving and high efficiency, and can economically grind the material to below 45 microns, and is more and more widely used in mineral regrinding and fine grinding operation.

[0003] The existing vertical stirring ore mill, such as the "falling type ball mill" disclosed in Chinese patent CN118253382A, comprises an outer cylinder, an inner cylinder and a lifting device arranged on the inner side of the inner cylinder. The lifting device comprises a hollow shaft arranged vertically, a feeding screw for lifting the grinding medium balls is arranged on the outer periphery of the hollow shaft, and a spline for transmission connection with the driving device is arranged on the upper end of the hollow shaft.

[0004] The upper end of the inner hole of the hollow shaft is a feeding port, and the lower end of the hollow shaft is provided with a feeding grid for seeping slurry. In use, the magnetic powder material to be processed from the outside is injected into the feeding port at the upper end of the hollow shaft, the material flows downward along the hollow shaft and finally seeps out into the grinding cavity through the feeding grid, the lifting device rotates under the drive of the driving device, the grinding medium balls are lifted to a certain height through the feeding screw, and then the grinding medium balls start free fall motion, and the grinding medium balls collide with each other to grind the material.

[0005] The existing vertical stirring ore mill has the following problems: as the grinding process continues, the size of the grinding medium balls becomes smaller and smaller, and the grinding medium balls may enter the inner hole of the hollow shaft through the feeding grid, causing the feeding blockage of the inner hole of the hollow shaft. If the size of the feeding grid is made particularly small, the feeding efficiency will be affected. In addition, the grinding of the material is completely realized by the mutual collision of the grinding medium balls in free fall, and the grinding action of the grinding medium balls is limited, which also limits the grinding efficiency. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a vertical stirring ore mill which can avoid the grinding medium balls from entering the inner hole of the hollow shaft and causing feeding blockage.

[0007] To solve the above technical problems, the technical scheme of a vertical stirring ore mill in the utility model is as follows:

[0008] A vertical stirring grinding mill comprises a barrel and a hollow shaft with a rotating axis extending in the up-down direction, the inside of the barrel is provided with grinding medium balls, the upper end of the inner hole of the hollow shaft is a hollow shaft feeding port, the hollow shaft is driven by a driving device, the outer periphery of the hollow shaft is provided with a hollow shaft stirring device, the lower end of the inner hole of the hollow shaft is a hollow shaft discharging port, the hollow shaft discharging port is provided with hollow shaft inner cavity helical blades fixed to the inner wall of the hollow shaft and extending in the up-down direction, and a helical pushing flow channel for pushing materials downward during the rotation of the hollow shaft is formed between the hollow shaft inner cavity helical blades and the inner wall of the hollow shaft.

[0009] Further, the upper end of the barrel is provided with a driving device support, the driving device is arranged on the driving device support, the driving device comprises a driving motor, the power output end of the driving motor is connected with a speed reducer, and the power output end of the speed reducer is in transmission connection with the upper end of the hollow shaft through a transmission belt.

[0010] Further, the outer periphery of the hollow shaft stirring device is arranged in a spaced mode with the inner wall of the barrel, and the grinding medium balls are distributed between the hollow shaft and the inner wall of the barrel.

[0011] Further, the barrel comprises a barrel shell and a barrel lining arranged on the inner wall of the barrel shell.

[0012] Further, the upper side of the hollow shaft feeding port is provided with a conical feeding hopper with a large lower end and a small upper end.

[0013] Further, the hollow shaft stirring device comprises first lifting blades and second lifting blades, the first lifting blades and the second lifting blades are helical blades for lifting the height of the grinding medium balls, and the first lifting blades and the second lifting blades are coaxially arranged.

[0014] Further, the outer periphery of the hollow shaft is fixed with blade supports, and the first lifting blades and the second lifting blades are detachably fixed to the blade supports through bolts.

[0015] The utility model discloses a beneficial effect is: the utility model discloses in using, the material of grinding enters the hollow shaft through the hollow shaft feeding port of the upper end of the hollow shaft, then along hollow shaft from top to bottom to hollow shaft inner cavity helical blade place, the hollow shaft inner cavity helical blade with the rotation of the hollow shaft, will produce a downward thrust to the material in helical pushing flow channel, thereby the material is pushed out through the hollow shaft discharging port and participates in the grinding between the grinding medium balls, because the material in helical pushing flow channel will receive a downward pushing force, therefore the grinding medium ball cannot move up to the hollow shaft inner hole against the pushing force, avoid the material blockage problem that the grinding medium ball enters the hollow shaft. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the presently disclosed example embodiments will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation in which like reference numerals

[0017] Figure 1 is a structural schematic view of embodiment 1 of the present application;

[0018] Figure 2 is an enlarged view of A of Figure 1

[0019] Figure 3 is a structural schematic view of embodiment 2 of the present application;

[0020] 1, drive device; 2, hollow shaft feeding port; 3, conical feeding hopper; 4, barrel discharge port; 5, drive device support; 6, hollow shaft; 7, hollow shaft stirring device; 8, barrel shell; 9, hollow shaft inner cavity helical blade; 10, barrel lining; 11, hollow shaft discharge port; 12, first lifting blade; 13, second lifting blade; 14, helical pushing flow channel; 15, stirring rod; 16, blade support. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0022] It should be noted that, unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by those skilled in the art of the present application. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0023] Embodiment 1 of a vertical stirring grinding machine in the present application is as shown in Figures 1-2 ​As shown: including the barrel and rotating axis along the upward and downward direction extending hollow shaft 6, the barrel coaxial with the hollow shaft 6, the hollow shaft 6 outer peripheral surface provided with hollow shaft stirring device 7, in this embodiment, the hollow shaft stirring device 7 includes the first material lifting blade 12 and the second material lifting blade 13, the first material lifting blade 12, the second material lifting blade 13 is used for lifting the spiral blade of the grinding medium ball height, the first material lifting blade, the second material lifting blade coaxial arrangement, that is, the first material lifting blade corresponds to a blade between the corresponding two adjacent blades of the second material lifting blade.

[0024] The upper end of the inner hole of the hollow shaft is the hollow shaft inlet 2, and the lower end of the inner hole of the hollow shaft is the hollow shaft outlet 11. The hollow shaft is driven by the driving device 1. The outer periphery of the hollow shaft stirring device is spaced apart from the inner wall of the barrel. A plurality of grinding medium balls are distributed between the inner wall of the barrel and the hollow shaft. That is, at a certain height, grinding medium balls are distributed between the hollow shaft stirring device and the inner wall of the barrel and between adjacent blades of the hollow shaft stirring device. A tapered feed hopper with a large upper side and a small lower side is arranged above the hollow shaft inlet. The tapered feed hopper is used to facilitate the entry of material into the hollow shaft inlet.

[0025] The hollow shaft outlet is provided with a hollow shaft inner cavity spiral blade 9 fixed to the inner wall of the hollow shaft, which extends along the upward and downward direction. The hollow shaft inner cavity spiral blade 9 and the inner wall of the hollow shaft form a spiral pushing flow channel 14 for pushing the material downward during the rotation of the hollow shaft.

[0026] The barrel includes a barrel shell and a barrel lining 10 arranged on the inner wall of the barrel shell 8. The barrel lining 10 can reduce the wear between the grinding medium balls and the barrel shell.

[0027] The upper end of the barrel is provided with a driving device support 5, and the driving device 1 is arranged on the driving device support 5. The driving device includes a driving motor, the power output end of the driving motor is connected with a speed reducer, and the power output end of the speed reducer is drivingly connected with the upper end of the hollow shaft through a transmission belt.

[0028] In this embodiment, the outer periphery of the hollow shaft is fixed with a blade support 16, and the first material lifting blade 12 and the second material lifting blade 13 are detachably fixed on the blade support 16 through bolts. In this way, when the first material lifting blade and the second material lifting blade are worn out, the first material lifting blade and the second material lifting blade can be easily replaced. Item 4 in the figure represents the barrel outlet.

[0029] In use, the material to be ground enters through the hollow shaft feed port, and then is discharged through the hollow shaft discharge port into the grinding space between the hollow shaft and the cylinder. The grinding medium balls are lifted by the first lifting blade and the second lifting blade, some of which continuously rise, and some of which collide radially during the rising process. The grinding medium balls that rise to a high point fall and collide. The various collision forms complete the grinding of the material. The rotating hollow shaft carries the helical blade in the hollow shaft inner cavity to rotate, so that the material has a downward extrusion pushing force in the helical pushing flow channel, avoiding the upward movement of the grinding medium balls into the hollow shaft inner hole. Not only does this help to avoid the problem of hollow shaft blockage caused by the grinding medium balls, but the larger helical pushing flow channel also ensures the feeding efficiency.

[0030] An embodiment 2 of the vertical spiral stirring grinding mill is shown in Figure 3 The embodiment 2 is different from the embodiment 1 in that the hollow shaft stirring device in the embodiment 2 is not a helical blade, but includes a plurality of stirring rods 15 that are arranged along the circumference of the hollow shaft. The length of the stirring rod 15 extends along the radial direction of the hollow shaft. In operation, the stirring rod rotates with the hollow shaft to stir the surrounding grinding medium balls. The grinding medium balls move in the circumferential direction, up and down, or in the radial direction to collide with each other to achieve the grinding of the material.

[0031] In the above description of the present specification, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected" or "linked" and the like should be understood in a broad sense. For example, as to the term "connected", it can be fixed connection, detachable connection, or integral; it can be mechanical connection, electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise explicitly limited in the present specification, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0032] According to the above description of the present specification, those skilled in the art can also understand the terms used as follows, for example, the terms indicating the orientation or positional relationship such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" are based on the orientation or positional relationship shown in the drawings of the present specification, which is only for the purpose of facilitating the description of the scheme of the present application and simplifying the description, and does not explicitly or implicitly indicate or suggest that the devices or elements involved must have the described specific orientation, be constructed and operated in a specific orientation. Therefore, the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the scheme of the present application.

[0033] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vertical stirring grinding mill, comprising a barrel and a hollow shaft with a rotating axis extending in the up-down direction, the inner side of the barrel is provided with grinding medium balls, the upper end of the inner hole of the hollow shaft is a hollow shaft feeding port, the hollow shaft is driven by a driving device, and the outer periphery of the hollow shaft is provided with a hollow shaft stirring device, characterized in that: The inner hole lower end of the hollow shaft is a hollow shaft discharge port, a hollow shaft inner cavity spiral blade extending along the up-down direction of the axis and fixed to the inner wall of the hollow shaft is arranged in the hollow shaft discharge port, and the hollow shaft inner cavity spiral blade and the inner wall of the hollow shaft form a spiral pushing flow channel for pushing the material downward during rotation of the hollow shaft. ​ 2. A vertical stirred mill according to claim 1, characterised in that: The upper end of the cylinder is provided with a driving device support, the driving device is arranged on the driving device support, the driving device comprises a driving motor, the power output end of the driving motor is connected with a speed reducer, and the power output end of the speed reducer is in transmission connection with the upper end of the hollow shaft through a transmission belt.

3. The vertical stirred mill of claim 1, wherein: The outer periphery of the hollow shaft stirring device is arranged in a spaced manner with the inner wall of the cylinder, and the grinding medium balls are distributed between the hollow shaft and the inner wall of the cylinder.

4. The vertical stirred mill of claim 3, wherein: The cylinder comprises a cylinder shell and a cylinder lining arranged on the inner wall of the cylinder shell.

5. The vertical stirred mill of claim 1, wherein: The upper side of the hollow shaft feeding port is provided with a conical feeding hopper with a large lower end and a small upper end.

6. A vertical stirred mill according to any one of claims 1 to 5, characterized in that: The hollow shaft stirring device comprises first lifting blades and second lifting blades, the first lifting blades and the second lifting blades are spiral blades for lifting the height of the grinding medium balls, and the first lifting blades and the second lifting blades are coaxially arranged.

7. A vertical stirred mill according to claim 6, characterised in that: The outer periphery of the hollow shaft is fixed with a blade support, and the first lifting blades and the second lifting blades are detachably fixed to the blade support through bolts.

Images