Flow-controllable slurry passing device and continuous ball mill

Abstract

The application discloses a flow-controllable slurry passing device and a continuous ball mill device, wherein the slurry passing device comprises a first joint, a second joint and a slurry passing pipe, the two ends of the slurry passing pipe are connected with the first joint and the second joint respectively, the first joint, the slurry passing pipe and the second joint are mutually penetrated to form a channel for slurry circulation, the slurry passing pipe is provided with an adjusting member, the adjusting member is arranged in a non-parallel way with the axial direction of the slurry passing pipe, and the adjusting member can reciprocate along the setting direction to adjust the cross-sectional area of the channel of the slurry passing pipe for slurry circulation. The continuous ball mill device comprises at least two ball mills and the flow-controllable slurry passing device, and the slurry passing device is arranged between two adjacent ball mills. The slurry passing device can effectively control the discharge amount of the ball mill to be equal to the feeding amount, so that the liquid level in the ball mill is kept high and stable, the power consumption of the ball mill during operation is reduced, the ball abrasion is reduced, the grinding effect is good, and the slurry is not easy to be blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding equipment, in particular to a flow-controllable over-slurry device and a continuous ball mill device. BACKGROUND

[0002] The continuous ball mill is connected by the over-slurry device, the feed side of the over-slurry device is connected to the end cover of the front ball mill, and the discharge side of the over-slurry device is connected to the end cover of the rear ball mill.

[0003] The screen plate of the end cover is used for screening the ball stones in the slurry, and a plurality of screen holes for the slurry to pass through are arranged on the screen plate. During long-time operation of the continuous ball mill, the ball stones are easily stuck in the screen holes and block the screen holes, resulting in a decrease in the flow cross-sectional area of the screen plate. In severe cases, the screen holes of the screen plate need to be cleaned by stopping the machine, but frequent stoppages will cause huge economic losses. Therefore, in order to prolong the cleaning cycle of the screen holes of the screen plate, it is common to increase the number of screen holes so that the actual flow cross-sectional area of the screen plate is greater than the minimum cross-sectional area required for production. However, this operation results in rapid flow of the slurry in the ball mill cylinder to the over-slurry device, a low liquid level of the slurry in the ball mill cylinder, and a large eccentricity, which leads to high power consumption and ball stone abrasion during operation of the ball mill. Therefore, the discharge amount and the feed amount of the ball mill need to be controlled to control the liquid level of the slurry in the ball mill cylinder.

[0004] However, the traditional over-slurry device is only used for conveying slurry and cannot control the feed amount and the discharge amount of the ball mill. Although the discharge mechanism of the low-energy-consumption continuous ball mill disclosed in Chinese Patent 201822056953.6 can increase the liquid level in the ball mill cylinder by closing the valve, when the liquid level reaches the overflow height, the slurry flows to the next ball mill cylinder. The discharge mechanism of this structure is prone to slurry deposition and blockage, and needs to be cleaned frequently. SUMMARY

[0005] In order to overcome the defects of the prior art, one of the purposes of the present application is to provide a flow-controllable over-slurry device, which can effectively control the discharge amount of the ball mill to be equal to the feed amount, thereby ensuring a high and stable liquid level in the ball mill to reduce power consumption and ball stone abrasion during operation of the ball mill and ensure good grinding effect, and at the same time, slurry clogging is not easy to occur.

[0006] The second purpose of the present application is to provide a continuous ball mill device with the characteristics of low power consumption, low ball stone abrasion, and high grinding effect.

[0007] One of the purposes of the present application is achieved by adopting the following technical solutions:

[0008] A flow-controllable slurry passing device comprises: a first joint, a second joint and a slurry passing pipe, wherein the two ends of the slurry passing pipe are respectively connected to the first joint and the second joint, and the first joint, the slurry passing pipe and the second joint are interconnected to form a channel for mud circulation, and the slurry passing pipe is provided with an adjusting member, which is arranged non-parallel to the axial direction of the slurry passing pipe, and the adjusting member can reciprocate along its setting direction to adjust the cross-sectional area of ​​the channel for circulating mud in the slurry passing pipe.

[0009] Furthermore, the adjusting member is arranged perpendicular to the axial direction of the pulp passing pipe, and the adjusting member can reciprocate along the vertical direction.

[0010] Furthermore, the regulating part is a knife valve, which is arranged at the end of the pulp pipe. The knife valve includes a driving part, a valve stem, a flange and a valve plate. The flange is fixed at one end of the pulp pipe, the valve plate is arranged in the flange, and the valve plate is arranged corresponding to one end surface of the pulp pipe. The two ends of the valve stem are respectively connected to the driving part and the valve plate, so as to drive the valve stem through the driving part and drive the valve plate to move perpendicular to the axial direction of the pulp pipe.

[0011] Furthermore, the driving part is a manual driving part, an electric driving part or a pneumatic driving part.

[0012] Furthermore, at least one end portion of the slurry passage pipe is provided with an adjusting member.

[0013] Furthermore, the slurry passing pipe includes a first slurry passing pipe and a second slurry passing pipe that are spliced ​​in sequence, and the first slurry passing pipe and the second slurry passing pipe are detachably connected.

[0014] Furthermore, an adjusting member is provided at two ends of the first slurry passing pipe and the second slurry passing pipe which are away from each other, and / or an adjusting member is provided between the first slurry passing pipe and the second slurry passing pipe.

[0015] Furthermore, the diameters of the first slurry passing pipe and the second slurry passing pipe are not equal, and the first slurry passing pipe and the second slurry passing pipe are connected via a transition pipe.

[0016] Furthermore, the first slurry passing pipe and the second slurry passing pipe are both connected to the transition pipe by clamping.

[0017] The second object of the present invention is achieved by adopting the following technical solutions:

[0018] A continuous ball milling device comprises at least two ball mills and the above-mentioned flow-controllable slurry passing device, wherein the slurry passing device is arranged between two adjacent ball mills.

[0019] Beneficial effects:

[0020] The present application adjusts the discharge amount of the ball mill by setting the adjusting member to regulate the flow area of the thickening pipe, so that the discharge amount of the ball mill is consistent with the feeding amount, thereby ensuring that the ball mill can maintain a suitable liquid level, reducing the power consumption and ball abrasion during the operation of the ball mill, and ensuring a better grinding effect. In addition, the present application changes the slurry flow by changing the cross-sectional area, and the cross-sectional area is reduced while the slurry flow rate is increased, so that the slurry is not easy to block in the ball mill and the thickening device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure schematic view of the continuous ball mill device in the embodiment;

[0022] Figure 2 A sectional view of the continuous ball mill device in the embodiment;

[0023] Figure 3 An exploded view of the thickening device in the embodiment;

[0024] Figure 4 A sectional view of the thickening device in the embodiment;

[0025] Figure 5 A Figure 4 An enlarged view of A in the embodiment.

[0026] In the drawings, the reference signs have the following meanings:

[0027] 1, thickening device; 11, first joint; 12, second joint; 13, thickening pipe; 131, first thickening pipe; 132, second thickening pipe; 14, adjusting member; 141, driving part; 142, valve rod; 143, flange plate; 144, valve plate; 15, transition pipe; 151, clamping groove; 152, buckle; 16, base frame; 17, fixed plate; 18, sealing member; 2, ball mill; 21, end cover; 22, conical inner flow passage; 23, slurry passage; 24, partition plate; 25, sieve plate; 26, sieve hole. DETAILED DESCRIPTION

[0028] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0031] Referring to Figure 1 and Figure 2 , the embodiment provides a continuous ball mill device, which comprises at least two ball mills 2, and the adjacent two ball mills 2 are connected through a slurry passing device 1. Specifically, the feeding side of the slurry passing device 1 is connected with the end cover 21 of the discharge side of the preceding ball mill 2, and the discharge side of the slurry passing device 1 is connected with the end cover 21 of the feeding side of the subsequent ball mill 2. Although only one side of the ball mill 2 is shown in the drawings of the embodiment, those skilled in the art should understand the connection structure of the continuous ball mill device through the introduction of this part of the text.

[0032] The end cover 21 of the ball mill 2 is provided with a sieve plate 25, a plurality of sieve holes 26 are arranged on the sieve plate 25 in a spaced manner, and the slurry is sieved through the sieve holes 26. Each sieve hole 26 is connected with a corresponding conical inner flow channel 22, and the adjacent conical inner flow channels 22 are arranged in a spaced manner through a spacing plate 24. The discharge ports of a plurality of conical inner flow channels 22 are connected to a slurry channel 23 through the spacing plate 24. The shape of the spacing plate 24 is matched with the shape of the conical inner flow channel 22, and the slurry channel 23 is in a cylindrical tubular structure. The opening size between the spacing plates 24 is smaller than the inner diameter of the slurry channel 23, so that the slurry sieved through the sieve holes 26 can flow to the slurry channel 23 through the conical inner flow channels 22 and the spacing plates 24. The slurry channel 23 is connected with the slurry passing device 1.

[0033] In the prior art, during the long-time operation of the continuous ball mill, the ball stones are easily stuck in the sieve holes 26 and block the sieve holes 26, which reduces the flow cross-sectional area of the sieve plate 25. Even in the case of serious blockage, it is necessary to stop the machine to clean the sieve holes 26 of the sieve plate 25. However, frequent stoppage will cause huge economic losses. Therefore, in order to prolong the cleaning period of the sieve holes 26 of the sieve plate 25, it is common to increase the number of sieve holes 26 so that the actual flow cross-sectional area of the sieve plate 25 is larger than the minimum cross-sectional area required for production. However, this operation causes the slurry in the cylinder of the ball mill 2 to flow quickly to the slurry passing device 1, the liquid level of the slurry in the cylinder of the ball mill 2 is low, and the eccentricity is large, which causes high power consumption and high ball stone wear during the operation of the ball mill 2. Therefore, on the basis of increasing the number of sieve holes 26 to avoid blockage of the sieve holes 26 by the slurry, it is important to strictly control the slurry discharge amount to keep the slurry liquid level in the cylinder of the ball mill 2 at a stable height.

[0034] Therefore, referring to Figure 3 and Figure 4The embodiment also provides a slurry passing device, which comprises a first joint 11, a second joint 12 and a slurry passing pipe 13, the slurry passing pipe 13 is arranged between the first joint 11 and the second joint 12, Figure 3 The left end of the slurry passing pipe 13 is connected with the first joint 11, the right end of the slurry passing pipe 13 is connected with the second joint 12, and the first joint 11, the slurry passing pipe 13 and the second joint 12 are mutually penetrated to form a channel for slurry passing. The first joint 11 is an inlet joint of the slurry passing device 1, which is connected with the slurry channel 23 of the front ball mill 2, the second joint 12 is an outlet joint of the slurry passing device 2, which is connected with the inlet of the rear ball mill 2, so that the two adjacent ball mills are connected through the slurry passing device 1.

[0035] Since the end cover of the front ball mill 2 and the rear ball mill 2 rotates to grind the slurry by the ball stones, the first joint 11 and the second joint 12 are both rotatable structures, and the first joint 11 rotates synchronously with the front ball mill 2, and the second joint 12 rotates synchronously with the rear ball mill 2. The slurry passing pipe 13 is a static non-rotating pipe, in order to avoid the first joint 11 and the second joint 12 rotating to shake or follow the rotation of the slurry passing pipe 13, the slurry passing pipe 13 needs to be fixed. Referring to Figure 3 and Figure 4 The slurry passing device 1 is provided with a base frame 16, and the bottom of the slurry passing pipe 13 is fixed on the base frame 16 through a fixing plate 17, so as to ensure the static state of the slurry passing pipe 13.

[0036] Further, the connection part of the slurry passing pipe 13 with the first joint 11 and the second joint 12 is provided with a sealing element 19, so as to avoid the slurry leakage at the connection part due to the rotation and other operations. The sealing element 19 can be a sealing ring or a sealing gasket commonly used in the prior art.

[0037] Referring to Figure 3 and Figure 4 In order to reasonably control the discharge amount and the feeding amount of the ball mill 2 to adapt to each other, so as to keep the liquid level in the ball mill 2 stable, the slurry passing device 1 is also provided with an adjusting element 14, the adjusting element 14 is arranged in an axial non-parallel manner with the slurry passing pipe 13, the adjusting element 14 is arranged at the channel for passing the slurry, and the adjusting element 14 can reciprocate in a direction non-parallel to the axial direction of the slurry passing pipe 13, so as to adjust the cross-sectional area of the channel for passing the slurry of the slurry passing pipe 13, thereby adjusting the discharge amount of the ball mill 2, so as to keep the discharge amount and the feeding amount of the ball mill 2 consistent, thereby ensuring that the ball mill 2 can keep a suitable liquid level, so as to reduce the power consumption, the ball stone abrasion and ensure a good grinding effect when the ball mill 2 operates. In addition, the embodiment changes the slurry flow by changing the cross-sectional area of the passing, and the cross-sectional area decreases while the slurry flow rate increases, so that the slurry is not easy to be blocked in the ball mill 2 and the slurry passing device 1.

[0038] Specifically, the adjusting member 14 is arranged perpendicularly to the axial direction of the pulp pipe 13, and is arranged at one end of the pulp pipe 13. The adjusting member 14 can be a knife valve, which comprises a driving part 141, a valve rod 142, a flange plate 143 and a valve plate 144. The flange plate 143 is connected to one end of the pulp pipe 13. The valve plate 144 is arranged in the flange plate 143 and can move perpendicularly to the axial direction of the pulp pipe 13. The valve plate 144 is adapted to the inner cross section of the pulp pipe 13. The side of the valve plate 144 is connected to one end of the valve rod 142. The other end of the valve rod 142 is connected to the driving part 141. The valve rod 142 is arranged perpendicularly to the axial direction of the pulp pipe 13. Thus, the driving part 141 can drive the valve rod 142 to move perpendicularly to the axial direction of the pulp pipe 13, i.e. to drive the valve plate 144 to move synchronously, so as to adjust the cross section of the pulp flow. For example, when the discharge amount of the pulp of the ball mill 2 is too large, the driving part 141 drives the valve rod 142 and the valve plate 144 to move downward to a proper position, so that the discharge amount of the pulp is equal to the feeding amount, thereby ensuring the stability of the liquid level in the ball mill 2. Moreover, since the valve plate 144 moves downward to reduce the cross section of the pulp flow of the pulp pipe 13, the flow rate of the pulp is increased, so that the pulp is not easy to be blocked in the ball mill 2 and the pulp flow device 1, and the pulp flows back to the ball mill 2 through the pulp channel 23, the partition plate 24 and the conical inner flow channel 22, thereby ensuring the stability of the liquid level in the ball mill 2. When the discharge amount of the pulp of the ball mill 2 is too small, the driving part 141 drives the valve rod 142 and the valve plate 144 to move upward to a proper position, so that the discharge amount of the pulp is equal to the feeding amount, thereby ensuring the stability of the liquid level in the ball mill 2.

[0039] The adjusting member 14 can be arranged at any end of the pulp pipe 13, i.e. between the first joint 11 and the pulp pipe 13, or between the pulp pipe 13 and the second joint 12. The position of the adjusting member 14 can be determined according to the discharge speed of the pulp, the discharge amount of the pulp, the length of the pulp pipe 13 and the length of the pulp channel 23, so as to ensure that the discharge amount of the pulp of the ball mill 2 can be quickly changed after the adjusting member 14 is adjusted, thereby quickly stabilizing the liquid level in the ball mill 2.

[0040] Further, the two ends of the thickener pipe 13 are provided with adjusting members 14, so that the adjusting member 14 between the first joint 11 and the thickener pipe 13 can adjust the slurry discharge amount of the front ball mill 2, and the adjusting member 14 between the second joint 12 and the thickener pipe 13 can adjust the feeding amount of the rear ball mill 2. Thus, the feeding amount and the discharge amount of each ball mill 2 are simultaneously adjusted, and the feeding amount and the discharge amount can be more quickly adjusted to be equal, so as to ensure that the liquid level in the ball mill 2 quickly reaches stability. Moreover, the adjusting member 14 between the second joint 12 and the thickener pipe 13 can also assist the adjusting member 14 between the first joint 11 and the thickener pipe 13 to adjust the discharge amount of the front ball mill 2, and the adjusting member 14 between the first joint 11 and the thickener pipe 13 can also assist the adjusting member 14 between the second joint 12 and the thickener pipe 13 to adjust the feeding amount of the rear ball mill 2. In this way, the feeding amount and the discharge amount of each ball mill 2 can be adjusted by one main adjusting member 14 and one auxiliary adjusting member 14, the suitable and stable liquid level in the ball mill 2 can be quickly reached, and the power consumption and the ball abrasion of the ball mill 2 during operation are obviously reduced, and a better grinding effect is ensured.

[0041] On this basis, the thickener pipe 13 comprises a detachably connected first thickener pipe 131 and a second thickener pipe 132. One end of the first thickener pipe 131 away from the second thickener pipe 132 is connected with the first joint 11, and one end of the second thickener pipe 132 away from the first thickener pipe 131 is connected with the second joint 12. Two adjusting members 14 are respectively arranged between the first joint 11 and the first thickener pipe 131 and between the second joint 12 and the second thickener pipe 132. Thus, the first thickener pipe 131 and the second thickener pipe 132 with suitable sizes can be selected, so as to ensure that the length of the thickener pipe 13 can be adjusted according to the actual working condition.

[0042] Further, the first thickener pipe 131 and the second thickener pipe 132 are provided with an adjusting member 14 therebetween. Thus, the thickener device 1 can be provided with three adjusting members 14, so that the liquid level in the ball mill 2 can be quickly adjusted to reach a suitable height and remain stable through the cooperation of the multiple adjusting members 14.

[0043] In addition, if the pipe diameters of the front ball mill 2 and the rear ball mill 2 are different, i.e., the sizes of the first joint 11 and the second joint 12 are different, correspondingly, the pipe diameters of the first thickener pipe 131 and the second thickener pipe 132 are not equal. The first thickener pipe 131 and the second thickener pipe 132 are connected through a transition pipe 15. In order to conveniently adjust the length of the thickener pipe 13, the first thickener pipe 131 and the second thickener pipe 132 can be detachably connected. In the embodiment, the detachable connection is selected to be clamping, so that the first thickener pipe 131 and the second thickener pipe 132 are connected through the transition pipe 15 through the cooperation of the clamping buckle 152 and the clamping groove 151. Figure 5The inner diameter of the two ends of the transition pipe 15 is respectively matched with the outer diameter of the corresponding first and second pulp pipes 131 and 132, the inner wall of the two ends of the transition pipe 15 is provided with a clamping groove 151, the outer wall of the corresponding end of the first and second pulp pipes 131 and 132 is provided with a buckle 152 matched with the clamping groove 151, so that the first pulp pipe 131, the transition pipe 15 and the second pulp pipe 132 are fixed and detachably connected through the clamping structure of the clamping groove 151 and the buckle 152. In actual application, the clamping groove 151 can also be arranged on the inner wall or the outer wall of the first and second pulp pipes 131 and 132, and the buckle 152 can also be arranged on the inner wall or the outer wall of the transition pipe 15, which can be arranged according to actual working conditions.

[0044] Of course, if the adjusting member 14 is arranged between the first and second pulp pipes 131 and 132, and the inner diameters of the first and second pulp pipes 131 and 132 are not equal, an adapter can be arranged to connect the three pipes.

[0045] As for the driving part 141 of the embodiment, it can be a manual driving part, for example, a hand wheel, and the operator can drive the valve rod 142 and the valve plate 144 by rotating the hand wheel, or an electric driving part, and the valve rod 142 and the valve plate 144 are driven by a motor, or a pneumatic driving part, and the valve rod 142 and the valve plate 144 are driven by compressed gas.

[0046] The technical means disclosed in the present application is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical solutions composed of any combination of the above technical features. It should be noted that, for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A continuous ball mill apparatus, characterized by, The application relates to a slurry control device and at least two ball mills, wherein the slurry control device is arranged between two adjacent ball mills to adjust the discharge amount and the feeding amount of each ball mill. The slurry control device comprises a first joint, a second joint and a slurry control pipe, the first joint is connected to the front ball mill, the second joint is connected to the rear ball mill, the two ends of the slurry control pipe are connected to the first joint and the second joint respectively, the first joint, the slurry control pipe and the second joint are mutually connected to form a channel for slurry circulation, the two ends of the slurry control pipe are provided with adjusting members, the adjusting members are arranged in a direction non-parallel to the axial direction of the slurry control pipe, the adjusting members can reciprocate along the direction to adjust the cross-sectional area of the channel of the slurry control pipe for slurry circulation, the adjusting member between the first joint and the slurry control pipe can adjust the slurry discharge amount of the front ball mill and can assist in adjusting the feeding amount of the rear ball mill, and the adjusting member between the second joint and the slurry control pipe can adjust the feeding amount of the rear ball mill and can assist in adjusting the discharge amount of the front ball mill. The adjusting member is arranged perpendicularly to the axial direction of the slurry control pipe, and the adjusting member can reciprocate along the perpendicular direction.

2. The continuous ball mill apparatus of claim 1, wherein: The adjusting member is a knife valve, the knife valve is arranged at the end of the slurry control pipe, the knife valve comprises a driving part, a valve rod, a flange plate and a valve plate, the flange plate is fixedly arranged at one end of the slurry control pipe, the valve plate is arranged in the flange plate and faces one end surface of the slurry control pipe, and the two ends of the valve rod are connected to the driving part and the valve plate respectively, so that the valve rod and the valve plate are driven to move perpendicularly to the axial direction of the slurry control pipe through the driving part.

3. A continuous ball mill apparatus as claimed in claim 2, wherein: The driving part is a manual driving part, an electric driving part or a pneumatic driving part.

4. The continuous ball mill apparatus of claim 3, wherein: The slurry control pipe comprises a first slurry control pipe and a second slurry control pipe which are sequentially spliced, and the first slurry control pipe and the second slurry control pipe are detachably connected.

5. The continuous ball mill apparatus of claim 3, wherein: The adjusting member is arranged between the first slurry control pipe and the second slurry control pipe.

6. The continuous ball mill apparatus of claim 5, wherein: The pipe diameter of the first slurry control pipe is not equal to that of the second slurry control pipe, and the first slurry control pipe and the second slurry control pipe are connected through a transition pipe.

7. A continuous ball mill apparatus as claimed in claim 5 or 6, wherein: The first slurry control pipe and the second slurry control pipe are clamped to the transition pipe.

8. The continuous ball mill apparatus of claim 7, wherein: ​

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