CA1108574A - High energy transfer ball mill - Google Patents
High energy transfer ball millInfo
- Publication number
- CA1108574A CA1108574A CA310,755A CA310755A CA1108574A CA 1108574 A CA1108574 A CA 1108574A CA 310755 A CA310755 A CA 310755A CA 1108574 A CA1108574 A CA 1108574A
- Authority
- CA
- Canada
- Prior art keywords
- oscillator
- chamber
- mill
- ball mill
- conductor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims 1
- 230000010355 oscillation Effects 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating 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
- B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Powder Metallurgy (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A mechanical oscillator is connected by an elongated oscillation conductor to a ball chamber containing the material to be milled, which oscillation conductor is tuned to transfer the maximum oscaillation energy to the ball chamber by selection of the length, section, and material thereof.
A mechanical oscillator is connected by an elongated oscillation conductor to a ball chamber containing the material to be milled, which oscillation conductor is tuned to transfer the maximum oscaillation energy to the ball chamber by selection of the length, section, and material thereof.
Description
lll~D~S74 This invention relates to ball mills that are oscillated.
Ball mills are known in which a ball chamber is oscillated, as well as rotated for milling material in the ball chamber, by electromagnetic or mechanical oscillators that are closely assoc-iated with the ball chamber at a variable frequency ranging from --150Hz to 30,000Hz.
i The present invention not only simplifies oscillated ball -mills but provides novel means for conducting oscillations from a mechanical oscillator, that is tunable for maximum efficiency.
According to the present invention there is provided an elongated oscillation conductor, such as a steel beam, or steel pipe for mechanically connecting the oscillator to the ball mill which may also be rotated about the axis of the oscillation con-ductor during the material milling operation. The conduction is tuned~ for maximum oscillation efficiency based on the speed of rotation of the ball chamber, the material being milled, and the frequency output of the oscillator. As a result, milling is more efficient.
The present invention will be further illustrated by way of the accompanying drawings which illustrate an embodiment of the invention and in which Fig. 1 is a fragmentary view mainly in side elevation and ~ partly in section of such embodiment, Fig. 2 is a sine wave of ball mill horizontal amplitude displacement plotted against time due to oscillation of the mill.
The ball mill assembly illustrated comprises a ball mill 10, a variable frequency oscillator 12, an elongated oscillator conductor 14 connecting the oscillator 12 to a chamber 16 con-taining balls 18 and material 20 to be milled, of the ball mill 10.
3a The oscillator conductor 14 comprises a plurality of steel pipe sections 22 having end flanges 24 that are bolted together, and to similar pipe connections 26 and 28 to the chamber 16 and oscillator 12, respectively.
~8574 The chamber 16 is provided with a loading port 30 having a hatch 32 for charging the chamber 16 with the balls 18 and material 20 to be milled. A vacuum or purge pipe 34 is also con-nected to the chamber 16. A fluid jacket 36 having a coolant in-let 38 and outlet 40 and connected to one end of the top, and to the other end of the bottom, respectively, of jacket 36. The jacket 36 is mounted on rollers 42 allowing the mill 10 to oscillate -longitudinally, and the oscillator 12 is mounted on air or rubber cushions 44 for the same purpose.
In operation, the oscillator 12 imparts longitudinal oscillations to the steel pipe 14, which, in turn, oscillates the ball mill chamber 16, with (sine) shock waves 46, Fig. 2, in which chamber longitudinal displacement amplitute is plotted against time. The pipe 14 constitutes means for tuning the oscillation for maximum transfer of energy to the steel alloy balls 18 in the chamber 16. The spring-mass of the longitudinal oscillator con-ductor is at a frequency at near its natural frequency, or near some even or odd multiple of its fundamental frequency for high energy transmission to the ball mill. The amplitude and power transfer are controlled by simply adjusting the frequency output of oscillator 12. The geometry of pipe 14 is selected to produce power transfer for a given milling operation at such frequency.
Mechanical oscillators of 148, 428 and 1000 horsepower are commercially available, but have a machine limit of 14OHz (cycles/second).
Metal powders are loaded into the ball mill, and are subjected to a variable force amplitude of 30,000 to 225,000 pounds at 13OHz for example, with a displacement amplitude of about 0.2 inches. The steel balls are thus energized and the metal particles are deformed therebetween, exposing atomically clean surfaces.
The chamber can be rotated if desired in a well known manner, and the assembe may be vertical, if desired without departing 1~857~
from the invention. Also the elongated oscillator conductor may be composed of any suitable material for the purpose. The inven- -tion is also suitable for organic and inorganic chemical reactions involving fluids and solids in the chamber that is oscillated with high energy. As the high energy transfer ball mill of the present invention will operate at zero gravity or independently of gravi-tational field strength, it can be used in outer space laboratory applications and outer space production facilities.
2a 3a
Ball mills are known in which a ball chamber is oscillated, as well as rotated for milling material in the ball chamber, by electromagnetic or mechanical oscillators that are closely assoc-iated with the ball chamber at a variable frequency ranging from --150Hz to 30,000Hz.
i The present invention not only simplifies oscillated ball -mills but provides novel means for conducting oscillations from a mechanical oscillator, that is tunable for maximum efficiency.
According to the present invention there is provided an elongated oscillation conductor, such as a steel beam, or steel pipe for mechanically connecting the oscillator to the ball mill which may also be rotated about the axis of the oscillation con-ductor during the material milling operation. The conduction is tuned~ for maximum oscillation efficiency based on the speed of rotation of the ball chamber, the material being milled, and the frequency output of the oscillator. As a result, milling is more efficient.
The present invention will be further illustrated by way of the accompanying drawings which illustrate an embodiment of the invention and in which Fig. 1 is a fragmentary view mainly in side elevation and ~ partly in section of such embodiment, Fig. 2 is a sine wave of ball mill horizontal amplitude displacement plotted against time due to oscillation of the mill.
The ball mill assembly illustrated comprises a ball mill 10, a variable frequency oscillator 12, an elongated oscillator conductor 14 connecting the oscillator 12 to a chamber 16 con-taining balls 18 and material 20 to be milled, of the ball mill 10.
3a The oscillator conductor 14 comprises a plurality of steel pipe sections 22 having end flanges 24 that are bolted together, and to similar pipe connections 26 and 28 to the chamber 16 and oscillator 12, respectively.
~8574 The chamber 16 is provided with a loading port 30 having a hatch 32 for charging the chamber 16 with the balls 18 and material 20 to be milled. A vacuum or purge pipe 34 is also con-nected to the chamber 16. A fluid jacket 36 having a coolant in-let 38 and outlet 40 and connected to one end of the top, and to the other end of the bottom, respectively, of jacket 36. The jacket 36 is mounted on rollers 42 allowing the mill 10 to oscillate -longitudinally, and the oscillator 12 is mounted on air or rubber cushions 44 for the same purpose.
In operation, the oscillator 12 imparts longitudinal oscillations to the steel pipe 14, which, in turn, oscillates the ball mill chamber 16, with (sine) shock waves 46, Fig. 2, in which chamber longitudinal displacement amplitute is plotted against time. The pipe 14 constitutes means for tuning the oscillation for maximum transfer of energy to the steel alloy balls 18 in the chamber 16. The spring-mass of the longitudinal oscillator con-ductor is at a frequency at near its natural frequency, or near some even or odd multiple of its fundamental frequency for high energy transmission to the ball mill. The amplitude and power transfer are controlled by simply adjusting the frequency output of oscillator 12. The geometry of pipe 14 is selected to produce power transfer for a given milling operation at such frequency.
Mechanical oscillators of 148, 428 and 1000 horsepower are commercially available, but have a machine limit of 14OHz (cycles/second).
Metal powders are loaded into the ball mill, and are subjected to a variable force amplitude of 30,000 to 225,000 pounds at 13OHz for example, with a displacement amplitude of about 0.2 inches. The steel balls are thus energized and the metal particles are deformed therebetween, exposing atomically clean surfaces.
The chamber can be rotated if desired in a well known manner, and the assembe may be vertical, if desired without departing 1~857~
from the invention. Also the elongated oscillator conductor may be composed of any suitable material for the purpose. The inven- -tion is also suitable for organic and inorganic chemical reactions involving fluids and solids in the chamber that is oscillated with high energy. As the high energy transfer ball mill of the present invention will operate at zero gravity or independently of gravi-tational field strength, it can be used in outer space laboratory applications and outer space production facilities.
2a 3a
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1 A high energy transfer mill comprising a chamber for containing the material to be milled, an elongated oscillator conductor connected at one end to said chamber, and a mechanical oscillator connected to the other end of said oscillator conductor.
2. A mill as claimed in claim 1, in which said oscillator comprises a variable frequency output, said oscillator conductor comprises means for tuning the energy imparted to the material in said chamber at such output frequency for maximum efficiency of the milling process.
3. A mill as claimed by claim 2, in which said oscillator conductor includes an elongated horizontal steel pipe composed of sections having flanges that are bolted together at adjoining ends, and said chamber contains steel balls for milling metal alloy powder therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA310,755A CA1108574A (en) | 1978-09-06 | 1978-09-06 | High energy transfer ball mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA310,755A CA1108574A (en) | 1978-09-06 | 1978-09-06 | High energy transfer ball mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1108574A true CA1108574A (en) | 1981-09-08 |
Family
ID=4112304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA310,755A Expired CA1108574A (en) | 1978-09-06 | 1978-09-06 | High energy transfer ball mill |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1108574A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511254A (en) * | 1982-12-06 | 1985-04-16 | Henry North | Cavitators |
| WO1994009907A1 (en) * | 1992-10-30 | 1994-05-11 | Paolo Matteazzi | High-energy high-capacity oscillating ball mill |
-
1978
- 1978-09-06 CA CA310,755A patent/CA1108574A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511254A (en) * | 1982-12-06 | 1985-04-16 | Henry North | Cavitators |
| WO1994009907A1 (en) * | 1992-10-30 | 1994-05-11 | Paolo Matteazzi | High-energy high-capacity oscillating ball mill |
| US5702060A (en) * | 1992-10-30 | 1997-12-30 | Matteazzi; Paolo | High-energy high-capacity oscillating ball mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |