CN111282666A - Wet grinder - Google Patents

Wet grinder Download PDF

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Publication number
CN111282666A
CN111282666A CN202010238292.8A CN202010238292A CN111282666A CN 111282666 A CN111282666 A CN 111282666A CN 202010238292 A CN202010238292 A CN 202010238292A CN 111282666 A CN111282666 A CN 111282666A
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CN
China
Prior art keywords
ball
pipe
wet
sealing element
cylinder
Prior art date
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Granted
Application number
CN202010238292.8A
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Chinese (zh)
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CN111282666B (en
Inventor
刘水海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhujiang Changjiang Cemented Carbide Equipment Co ltd
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Zhujiang Changjiang Cemented Carbide Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Zhujiang Changjiang Cemented Carbide Equipment Co ltd filed Critical Zhujiang Changjiang Cemented Carbide Equipment Co ltd
Priority to CN202010238292.8A priority Critical patent/CN111282666B/en
Publication of CN111282666A publication Critical patent/CN111282666A/en
Application granted granted Critical
Publication of CN111282666B publication Critical patent/CN111282666B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/10Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18Details
    • B02C17/1805Monitoring devices for tumbling mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18Details
    • B02C17/183Feeding or discharging devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02Feeding devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/04Safety devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00Control arrangements specially adapted for crushing or disintegrating

Abstract

The invention discloses a wet grinder which comprises a ball grinding cylinder, wherein the upper part of the ball grinding cylinder is respectively provided with a ball outlet and a chain wheel, the lower part of the ball grinding cylinder is provided with a tilted hopper and a slag discharge port, the lower end inside the cylinder body of the ball grinding cylinder is also provided with a ball separation grid, one side of the ball grinding cylinder is connected with a feed pipe, one end of the feed pipe, which is far away from the ball grinding cylinder, is a feed inlet, the two sides of the feed pipe are respectively connected with a circulating pipe and a solvent inlet pipe, one side of the solvent inlet pipe is connected with an exhaust pipe, the other end of the circulating pipe, which is far away from the feed pipe, is connected with the slag discharge port arranged at the lower part of the ball. The invention has the beneficial effects that: realize automatic feeding, wet-milling, exhaust, increased ground paste temperature control and section of thick bamboo internal pressure monitoring moreover, the whole operation of equipment passes through computer control, has realized the full automatic operation of wet-milling machine, has reduced the cost of labor of enterprise, has improved the production efficiency of enterprise, has also avoided the potential safety hazard of exploding a section of thick bamboo easily simultaneously.

Description

Wet grinder
Technical Field
The invention relates to the technical field of hard alloy wet grinding, in particular to a wet grinding machine.
Background
Wet grinding, namely putting balls, powder and a solvent into a grinding cylinder for ball milling according to a certain proportion, wherein the wet grinding for producing the hard alloy has the characteristics that: the powder is very hard, the boiling point of the solvent is low, low temperature and air isolation are required to prevent oxygenation, the uniformity requirement is high, and the like, and two methods are mainly adopted at present: the first type is a roll ball mill inclinable wet grinder, and the second type is a vertical stirring ball mill;
at present, the tiltable wet grinder (more than 90 percent) is mostly adopted in the domestic hard alloy industry. The two ball mills are not automated for various reasons, so that the ball mills have more components and higher labor intensity when used. Take tilting-type wet grinder as an example, the gland is opened to the manual work during feeding, the manual work is thrown the material, add the solvent, after the gland is adorned, the material ball-mills in inclosed barrel, can produce heat because of the ball-milling in-process, the solvent becomes the gaseous state easily and produces pressure, need artifical periodic "gassing" to get rid of the risk of exploding the section of thick bamboo, the ball-milling is accomplished the back, the manual work is changed into the discharge hopper with the gland, need repetitious operation slope barrel, add the solvent and unload the ground paste, reach and unload clean purpose, this kind of operation mode is time-consuming, hard, it is also more to operate the step, the production efficiency of enterprise has seriously been reduced, artificial cost is also relatively higher simultaneously.
Disclosure of Invention
The object of the present invention is to provide a wet grinder to solve the problems set forth in the background art described above.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a wet grinder, includes the ball mill section of thick bamboo, ball mill section of thick bamboo upper portion is equipped with out ball mouth and sprocket respectively, ball mill section of thick bamboo lower part is equipped with oblique fill and row cinder notch, the inside lower extreme of ball mill section of thick bamboo barrel still is equipped with the ball grid that separates, ball mill section of thick bamboo one side is connected with the inlet pipe, the inlet pipe is kept away from the one end of ball mill section of thick bamboo is the feed inlet, the inlet pipe both sides respectively with the circulating pipe, advance solvent pipe and be connected, it is connected with the blast pipe to advance solvent pipe one side, the circulating pipe is kept away from the other end and the setting of inlet pipe are in the row cinder notch of ball mill section of thick bamboo lower part is connected, the circulating pipe is close to be equipped with.
Preferably, the ball milling barrel is provided with a first sealing element and a second sealing element respectively close to the two sides of the feeding pipe and the filtering device, and the first sealing element and the second sealing element are both rotary sealing elements.
Preferably, the first sealing element and the second sealing element are both arranged on the first support and the second support which are arranged at two ends of the ball grinding cylinder.
Preferably, the lower part of the first support is provided with a motor which is a speed reduction motor, the lower part of the second support is provided with a cushion block, and one side of the second support is also provided with a lifting cylinder connected with the second support.
Preferably, the lower part of the first bracket is provided with an inclined fulcrum, and the inclined fulcrum is used for rotating and inclining the equipment along the inclined fulcrum.
Preferably, the feed pipe and the circulating pipe are connected with the shaft end of the cylinder body by adopting a rotary seal.
Preferably, the circulating pipe body is further provided with a temperature measuring device, a pressure measuring device and a sampling port in sequence.
Preferably, the ball milling barrel is isolated from the atmosphere through an exhaust pipe, so that the risk of barrel explosion due to overhigh pressure is avoided.
Preferably, the wet grinder is arranged in a heat-preservation container, and an air conditioning unit for reducing the internal temperature is arranged in the container.
Preferably, the upper part of the heat-preservation container is also provided with a feed inlet matched and corresponding to the feed inlet.
Advantageous effects
The wet grinder provided by the invention realizes automatic feeding, wet grinding and exhaust, and increases slurry temperature control and cylinder internal pressure monitoring, the whole process operation of the equipment is controlled by a computer, and the equipment is started by one key, so that the full-automatic operation of the wet grinder is realized, the labor cost of enterprises is reduced, the production efficiency of the enterprises is improved, and meanwhile, the potential safety hazard of easily exploding the cylinders is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the present invention.
Reference numerals
In the figure: 1-a ball milling barrel, 2-a ball outlet, 3-a chain wheel, 4-a feed inlet, 5-a solvent inlet pipe, 6-an exhaust pipe, 7-a circulating pipe, 8-a first sealing element, 9-a first bracket, 10-a motor, 11-an inclined fulcrum, 12-a ball separating grid, 13-an inclined hopper, 14-a slag discharge port, 15-a cushion block, 16-a lifting cylinder, 17-a second bracket, 18-a second sealing element, 19-a filtering device, 20-a slurry pump, 21-a discharge port, 22-a three-way valve and 23-a feed pipe.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Examples
As shown in figure 1-2, a wet grinding machine comprises a ball grinding cylinder 1, a ball outlet 2 is arranged at the upper part of the ball grinding cylinder 1, a chain wheel 3 is fixedly sleeved on the surface of the ball grinding cylinder 1 and is in transmission connection with a motor 10 through a transmission chain, an inclined hopper 13 is arranged at the lower part of the ball grinding cylinder 1, a slag discharge port 14 is arranged at the bottom of the inclined hopper 13, a ball separation grid 12 is further arranged at the lower end inside the cylinder body of the ball grinding cylinder 1, the ball separation grid 12 is positioned between the ball grinding cylinder 1 and the inclined hopper 13 and is communicated with the ball grinding cylinder 1 and the inclined hopper 13, the cylinder mouth of the ball grinding cylinder 1 is connected with a feed pipe 23, one end of the feed pipe 23 far away from the ball grinding cylinder 1 is a feed inlet 4 and is provided with a feed valve, two sides of the feed pipe 23 far away from the ball grinding cylinder 1 are respectively connected with a circulating pipe 7 and a solvent inlet pipe 5, the solvent inlet pipe 5 is provided with a feed electromagnetic valve, the feed pipe 23 is also connected with an exhaust pipe 6, the exhaust pipe, the feed pipe 23 and the circulating pipe 7 are connected with the shaft end of the cylinder body of the ball milling cylinder 1 by adopting rotary seal, the pipe body of the circulating pipe 7 close to one side of the ball milling cylinder 1 far away from the feed pipe 23 is respectively provided with a filtering device 19, a slurry pump 20 and a three-way valve 22, and one end of the three-way valve 22 is a discharge port 21.
Preferably, both ends of the ball milling barrel 1 are respectively provided with a first sealing element 8 and a second sealing element 18, the first sealing element 8 and the second sealing element 18 are both rotary sealing elements, the first sealing element 8 is arranged at the joint of the ball milling barrel 1 and the feed pipe 23, the second sealing element 18 is arranged at the joint of the ball milling barrel 1 and the circulating pipe 7, the barrel mouth of the ball milling barrel 1 is connected with the feed pipe 23 in a rotary sealing manner through the first sealing element 8, and one end of the circulating pipe 7, which is far away from the feed pipe 23, is connected with the connecting pipeline in a rotary sealing manner through the second sealing element 18.
Preferably, the first sealing element 8 and the second sealing element 18 are arranged on the first bracket 9 and the second bracket 17 arranged at two ends of the ball milling barrel 1.
Preferably, the motor 10 is arranged at the lower part of the first support 9, the motor 10 is a speed reduction motor, the cushion blocks 15 are arranged at the lower part of the second support 17, the two sides of the bottom of the second support 17 are further provided with lifting cylinders 16 connected with the two side of the bottom of the second support 17, the two cushion blocks 15 are respectively arranged at the front end and the rear end of the bottom of the second support 17, the first support 9 and the second support 17 are of an n-shaped structure, and the cylinder is arranged between the two cushion blocks 15 and moves the cushion blocks 15 through the cylinder.
Preferably, the two sides of the lower part of the first bracket 9 are provided with inclined fulcrums 11, the inclined fulcrums 11 are used for the equipment to rotate and incline along the inclined fulcrums, and the motor 10 is positioned between the two inclined fulcrums 11 and is higher than the inclined fulcrums 11.
Preferably, the feed inlet 4 and the discharge outlet 21 are connected with the shaft end of the cylinder body by adopting rotary seals, and the feed inlet 4 is provided with a feed valve.
Preferably, the pipe body of the circulating pipe 7 is also sequentially provided with a temperature measuring device, a pressure measuring device and a sampling port.
Preferably, the ball milling barrel 1 is isolated from the atmosphere by an exhaust pipe 6 for avoiding the risk of barrel explosion due to over-high pressure.
Preferably, the wet grinder is arranged in the heat preservation type container, and an air conditioning unit for reducing the internal temperature is arranged in the container.
Preferably, the upper part of the heat preservation type container is also provided with a feed inlet corresponding to the feed inlet 4 in a matching way.
Feeding: the lifting cylinder 16 is slightly jacked up, the cylinder connected with the cushion block 15 moves the cushion block 15, the cushion block 15 is separated from the second support 17, the lifting cylinder 16 falls, the ball mill barrel 1 rotates and inclines along the inclined fulcrum 11, the feed port 4 is in butt joint with the feed inlet, a feed valve on the feed port 4 is opened, the material automatically falls and enters the ball mill barrel 1, and in order to ensure smooth feeding, the ball mill barrel 1 can rotate and feed at the same time, so that automatic feeding is realized;
discharging, wherein a slurry pump 20 is arranged at the discharging end, slurry is pumped out through the slurry pump 20 and is conveyed to a specified point, automatic discharging is realized, and the ball milling barrel 1 can rotate and discharge simultaneously;
while the materials are ball-milled in the rolling ball milling barrel, the slurry can be circulated ceaselessly by pumping;
in order to ensure smooth slurry discharge, the cylinder body can be inclined, and the cylinder body is started to rotate as required;
in order to make the slurry flow smoothly, a ball separating grid is arranged on the outer wall of the cylinder in a certain direction, an inclined bucket is arranged outside the grid, the slurry flows into the pump downstream, and the balls are left in the cylinder;
the feed inlets are connected with the shaft end of the barrel body by adopting rotary seals;
during ball milling, the cylinder body is isolated from the atmosphere through an exhaust pipe and is not forced to be sealed, so that the risk of pressure and cylinder explosion is avoided;
during ball milling, the equipment is heated, the whole equipment is arranged in a heat-insulating container, and a plurality of groups of cooling air conditioning units are arranged in the container;
the equipment is provided with a circuit control system (a PLC automatic control system), slurry temperature control and pipe pressure monitoring, the operation process of the equipment is controlled in real time through a computer, and the equipment is provided with a key to start and stop, so that automation is realized.
When the materials are fed, the lifting cylinder 16 is slightly jacked up, the cylinder connected with the cushion block 15 moves the cushion block 15, the cushion block 15 is withdrawn, the cushion block 15 is separated from the second support 17 at the moment, the lifting cylinder 16 falls down, the ball mill barrel 1, the first support 9 and the second support 17 rotate and incline along the inclined fulcrum 11, when the second support 17 falls in place, the feeding port 4 is butted with the feeding port, a feeding electromagnetic valve on the feeding port 4 is opened, the materials flow into the ball mill barrel 1, the barrel inclines, the balls sink into the bottom, the feeding port cannot be blocked, and meanwhile, the barrel rotates, and the materials enter the barrel and are mixed with the balls;
the inclined hopper 13 is arranged in a certain sector area of the outer wall of the cylinder body of the ball grinding cylinder 1, the outer wall of the sector area of the cylinder body of the ball grinding cylinder 1 is punched to form a ball separation grid 12, balls are prevented from falling into the inclined hopper 13, and the inclined hopper 13 is favorable for the flowability of slurry during normal ball grinding;
two shaft ends of the ball grinding cylinder 1 are respectively connected with the circulating pipe 7 and the feeding pipe 23 through rotary sealing to ensure sealing, the ball grinding cylinder 1 is connected with the feeding pipe 23 through rotary sealing by a first sealing element 8, and a second sealing element 18 of the ball grinding cylinder 1 is connected with the circulating pipe 7 through rotary sealing;
if pressure gas exists in the cylinder, the pressure gas passes through the circulating pipe 7 and is finally discharged through the exhaust pipe 6, and the exhaust pipe 6 is isolated from the atmosphere by a water seal, so that the pressure in the cylinder is basically the same as the atmosphere.
When discharging, the inclined hopper 13 is arranged at the lowest part, the barrel body of the ball milling barrel 1 is inclined to increase the fluidity, the three-way valve 22 is switched to be communicated with the discharge port 21, and slurry is discharged to a designated container from the discharge port 21 without going through a circulating pipeline;
wherein the purpose of the filtering is to prevent broken balls from entering the pump body.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.

Claims (10)

1. A wet grinder comprising a ball grinding drum (1), characterized in that: ball mill section of thick bamboo (1) upper portion is equipped with ball mouth (2), sprocket (3) have been cup jointed on the surface of ball mill section of thick bamboo (1), ball mill section of thick bamboo (1) lower part is equipped with oblique fill (13), the bottom of fighting (13) to one side is equipped with row cinder notch (14), ball mill section of thick bamboo (1) barrel inside lower extreme still is equipped with separates ball grid (12), ball mill section of thick bamboo (1) one end is connected with inlet pipe (23), the one end that inlet pipe (23) were kept away from ball mill section of thick bamboo (1) is feed inlet (4), inlet pipe (23) both sides are connected with circulating pipe (7), advance solvent pipe (5) and blast pipe (6) respectively, the one end that inlet pipe (23) were kept away from in circulating pipe (7) is connected and is connected through connecting tube and row cinder notch (14) of setting in ball mill section of thick bamboo (1) lower part with the side of keeping away from inlet pipe (23) through the connecting tube, be equipped with filtration dress in the body that inlet pipe (23) Put (19), slurry pump (20) and three-way valve (22), three-way valve (22) one end is discharge gate (21).
2. The wet mill of claim 1, wherein: the ball mill is characterized in that a first sealing element (8) and a second sealing element (18) are respectively arranged on two sides of the ball mill barrel (1), and the first sealing element (8) and the second sealing element (18) are both rotary sealing elements.
3. The wet mill of claim 2, wherein: the first sealing element (8) is arranged at the joint of the ball milling cylinder (1) and the feeding pipe (23), and the second sealing element (18) is arranged at the joint of the ball milling cylinder (1) and the circulating pipe (7).
4. The wet mill of claim 2, wherein: the first sealing element (8) and the second sealing element (18) are arranged on the first support (9) and the second support (17) which are arranged at two ends of the ball grinding cylinder (1).
5. The wet mill of claim 4, wherein: first support (9) lower part is equipped with motor (10), motor (10) are gear motor, second support (17) lower part is equipped with cushion (15), second support (17) both sides still are equipped with lift cylinder (16) of being connected with it.
6. The wet mill of claim 4, wherein: an inclined fulcrum (11) is arranged at the lower part of the first support (9), and the inclined fulcrum (11) is used for rotating and inclining the equipment along the inclined fulcrum.
7. The wet mill of claim 1, wherein: the pipe body of the circulating pipe (7) is also sequentially provided with a temperature measuring device, a pressure measuring device and a sampling port.
8. The wet mill of claim 1, wherein: the ball grinding cylinder (1) is isolated from the atmosphere through an exhaust pipe (6) and used for avoiding the risk of cylinder explosion due to overhigh pressure.
9. The wet mill of claim 1, wherein: the wet grinder is arranged in the heat preservation type container, and an air conditioning unit used for reducing the internal temperature is arranged in the container.
10. The wet mill of claim 9, wherein: the upper part of the heat preservation type container is also provided with a feed inlet which is matched and corresponding to the feed inlet (4).
CN202010238292.8A 2020-03-30 2020-03-30 Wet mill Active CN111282666B (en)

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Application Number Priority Date Filing Date Title
CN202010238292.8A CN111282666B (en) 2020-03-30 2020-03-30 Wet mill

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Application Number Priority Date Filing Date Title
CN202010238292.8A CN111282666B (en) 2020-03-30 2020-03-30 Wet mill

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CN111282666A true CN111282666A (en) 2020-06-16
CN111282666B CN111282666B (en) 2023-12-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111790307A (en) * 2020-07-30 2020-10-20 苏倩 Integrated processing system and method for coal water slurry

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611885A (en) * 1946-05-13 1948-11-04 Edgar Allen & Co Ltd Improvements in and relating to ball mills or pulverising cylinders of the intermittent type
JPH05212306A (en) * 1992-02-06 1993-08-24 Babcock Hitachi Kk Wet mill
CN204724258U (en) * 2015-06-03 2015-10-28 广西鼎康科技股份有限公司 A kind of ball mill
CN205308470U (en) * 2015-12-28 2016-06-15 天津通一新能源科技有限公司 Ball mill with self -bleeding device
CN208275509U (en) * 2018-03-12 2018-12-25 中航迈特粉冶科技(北京)有限公司 Ball mill device
CN110586265A (en) * 2018-06-12 2019-12-20 台山市金昊贸易有限公司 Temperature-controlled ball mill
CN211964407U (en) * 2020-03-30 2020-11-20 株洲长江硬质合金设备有限公司 Wet grinder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611885A (en) * 1946-05-13 1948-11-04 Edgar Allen & Co Ltd Improvements in and relating to ball mills or pulverising cylinders of the intermittent type
JPH05212306A (en) * 1992-02-06 1993-08-24 Babcock Hitachi Kk Wet mill
CN204724258U (en) * 2015-06-03 2015-10-28 广西鼎康科技股份有限公司 A kind of ball mill
CN205308470U (en) * 2015-12-28 2016-06-15 天津通一新能源科技有限公司 Ball mill with self -bleeding device
CN208275509U (en) * 2018-03-12 2018-12-25 中航迈特粉冶科技(北京)有限公司 Ball mill device
CN110586265A (en) * 2018-06-12 2019-12-20 台山市金昊贸易有限公司 Temperature-controlled ball mill
CN211964407U (en) * 2020-03-30 2020-11-20 株洲长江硬质合金设备有限公司 Wet grinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111790307A (en) * 2020-07-30 2020-10-20 苏倩 Integrated processing system and method for coal water slurry

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Address after: 412000 no.508 Jinshan Road, Hetang District, Zhuzhou City, Hunan Province

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