Cyclotec a multinational engineering team has developed an innovative ultra fine grinding machine - based on a U.S patent from 1886!! (based on a 120 years old U.S patent!!)
This technology says Ezry Akkerman marketing director of Cyclotec is the most cost effective large scale production method for ultra fine and sub micron powders.
This technology he says, will play a key role in the development and production of innovative materials in the 21 th century.
http://www.im-mining.com/ --International mining magazine October issue 2005—feature issue comminution pp.5-6
According to Cyclotec, the PCM operates on a principle similar to a ball mill. In addition to rotation around a longitudinal axis, the drum also rotates around an axis of the motion of transport (e.g. planets rotating around the sun). The motion of transport “replaces” gravity acceleration (G) acting upon the balls in the ball mill, with a centripetal acceleration of the motion of transport, acting upon the balls in the PCM––and exceeding gravity acceleration by 10 to 300 Gs.
Problems that have so far hindered emergence of a commercial PCM include:
1] Failure of planetary gear at high load high speed operation,
2] Complexity of design for continuous even feed and discharge
of material;
3] Removal of excessive heat from the drums;
4] Provisions for dust removal.
The technology has potential for processing any material of mineral/ceramic origin, and would be well-suited for mobile applications. The developers claim that it offers extended run times and is designed to significantly reduce energy consumption.
From a scientific perspective, Cyclotec claims an improvement for ground materials properties
by reducing particle size to a molecular level, and by making the substance mechanically active.
Due to the energy intensity (which exceeds 2000 kW/m3 of grinding volume, comparing to 30 kWh/m3 in ball mill) mechanical activation effect causes for significant acceleration of chemical & upgrading processes.
Technology advantages
Planetary Centrifugal mill technology enables to have two additional parameters to control that will enable broader control of the grinding process:
a] Centrifugal speed (no critical speed limitation!)
b] Ratio of angular speeds
1] Extremely Compact footprint (1.5 t/h capacity achieved in four
drums five liter volume each!)
Low weight (1.5 t/h model weights 1.2 tons)
2] Significant energy saving: at least twice less power draw in
size range smaller then 400 mesh
(Minus 20 micron class, silica sand milling, feed F80 500 micron, LESS THEN 50 kW/ton)
Innovative ultra fine grinding by a continuous action industrial scale planetary mill
Cyclotec a multinational engineering team has developed an innovative ultra fine grinding machine - based on a U.S patent from 1886!! (based on a 120 years old U.S patent!!)
This technology says Ezry Akkerman marketing director of Cyclotec is the most cost effective large scale production method for ultra fine and sub micron powders.
This technology he says, will play a key role in the development and production of innovative materials in the 21 th century.
List of recent publications:
www.indmin.com - Industrial minerals magazine feature issue
June 2006 pp.61-62
http://www.ceramicindustry.com/CDA/A...149021,00.html
http://www.min-eng.com/comminution/109.html
Pit & Quarry; 1/1/2005 www.pitandquarry.com
E&MJ March 2005 pp.52 www.e-mj.com (feature)
http://www.wme.com/news.asp?d=/archi...4-13-00-20.htm
http://www.newmaterials.com/news/1909.asp
www.ranews.info/section/Indnews.pdf
http://www.im-mining.com/ --International mining magazine October issue 2005—feature issue comminution pp.5-6
According to Cyclotec, the PCM operates on a principle similar to a ball mill. In addition to rotation around a longitudinal axis, the drum also rotates around an axis of the motion of transport (e.g. planets rotating around the sun). The motion of transport “replaces” gravity acceleration (G) acting upon the balls in the ball mill, with a centripetal acceleration of the motion of transport, acting upon the balls in the PCM––and exceeding gravity acceleration by 10 to 300 Gs.
Problems that have so far hindered emergence of a commercial PCM include:
1] Failure of planetary gear at high load high speed operation,
2] Complexity of design for continuous even feed and discharge
of material;
3] Removal of excessive heat from the drums;
4] Provisions for dust removal.
The technology has potential for processing any material of mineral/ceramic origin, and would be well-suited for mobile applications. The developers claim that it offers extended run times and is designed to significantly reduce energy consumption.
From a scientific perspective, Cyclotec claims an improvement for ground materials properties
by reducing particle size to a molecular level, and by making the substance mechanically active.
Due to the energy intensity (which exceeds 2000 kW/m3 of grinding volume, comparing to 30 kWh/m3 in ball mill) mechanical activation effect causes for significant acceleration of chemical & upgrading processes.
Technology advantages
Planetary Centrifugal mill technology enables to have two additional parameters to control that will enable broader control of the grinding process:
a] Centrifugal speed (no critical speed limitation!)
b] Ratio of angular speeds
1] Extremely Compact footprint (1.5 t/h capacity achieved in four
drums five liter volume each!)
Low weight (1.5 t/h model weights 1.2 tons)
2] Significant energy saving: at least twice less power draw in
size range smaller then 400 mesh
(Minus 20 micron class, silica sand milling, feed F80 500 micron, LESS THEN 50 kW/ton)
3] Unmatched reduction ratio- (feed 5mm, product 20 micron
class)
4] Extended run time. (high speed, high efficiency planetary gear
with planned life span)
Low wear rate since there is no impact- milling achieved by
attrition.
5] Ability to operate under superior centrifugal loads - no critical
speed limitation.
6] Simplicity of continuous even feed and discharge of the raw &
grinded materials.
7] Simplicity of removal of the excessive heat and dust.
8] No vibration – no need for foundation.
9] Simplicity of the design – we practically have four ball mills
united together- meaning simple production adaptation.
10] Maintenance – easy & simple – complete disassembly &
ssembly takes six hours by one person.(liners change would
require four hours, if there is spare set of drums 2 hours).
11] Grinding Media charge ---- effortless and non stop grinding
process.
12] Autogenious Grinding – great potential for the realization of
the technology of AG with various
materials --- extremely low power draw comparing to existing
grinding processes/technologies,
eliminating contamination. Feed size capability in AG mode up
to 70 millimeters!!
Drastic improvement in critical class limitation.
13] Versatility- our PCM mill could be operated either in dry or wet
grinding process.
14] Intense Mechanical activation (milled granite could be a
partial cement substitute, milled slag could replace cement
on a pound to pound basis, self ignition of stored milled
coal)
15] Practically Immediate stabilization of the grinding process
(about one minute!)
16] The design could be applied either in continuous or batch
mode(for sub micron/nano applications)
17] Potential for large scale production of sub micron product
18] Grinding process— We already provide milling services to local
companies- demonstration possible anytime.
19] Upscale capability 50 t/h- ultra fine mode,100 t/h in AG mode.
We have experience milling quartz, silica sand, granite pebble, coal, metallurgical slag, ash, glass, zirconium oxide, silica carbide & etc)
Our milled material is less than five microns and 30% of this material is less then one micron in size.
Surface area by BET 5.1m2/gr! (continuous action-- filter product after classification )
Feed fraction 5mm (top size)!! (in ultra fine grinding mode with grinding media)
(F80 2000 microns) -- Which means unmatched reduction ratio.
Energy consumption for silica sand for d97 is:
5 microns max. 163 kWh/t (filter product after classification)
10 microns max. 103 kWh/t
20 microns max. 71 kWh/t
30 microns max. 58 kWh/t
40 microns max. 43 kWh/t
50 microns max. 40 kWh/t
60 microns max. 35 kWh/t
70 microns max. 28 kWh/t
Ezry Akkerman
Marketing Director
Cyclotec Oy
cyclotec@gmail.com
www.cyclotec.net ■