Rotor impact mill
RPMV & RPMX
Efficiently processing shredder fractions
Efficiently processing shredder fractions
The BHS rotor impact mill is a high-performance crusher with a vertical shaft that addresses the needs of the recycling industry. The mill’s unique impeller rotor works together with a toothed anvil ring to subject the inserted material to severe mechanical stress. Material compounds are crushed and separated selectively, entangled materials are isolated, and brittle-hard materials are crushed very finely. At the same time, metals are shaped into balls and cleaned. Watch the video to find out how to optimally prepare shredder fractions for separation by disaggregating composite material and pelletizing metals with the RPMX rotor impact mill.
Highlights
Unique crushing principle
- Impeller rotor is one of its kind worldwide
- High energy load to the feed material thanks to centrifugal forces
- Impact and shearing forces produce intensive shredding results
- Rotation results in a nearly constant gap
Future-proof investment
- Flexible use for variety of tasks thanks to variable peripheral speed of the rotor and adjustable gap between horseshoe hammers and anvil ring
- Effective processing of fine off-spec particle sizes
Selective crushing
- Brittle materials such as glass and minerals are finely shredded and/or pulverized via impact and shearing forces
Shaping of metals into balls
- Possible to pelletize even ductile materials due to high levels of stress being applied between the horseshoe-shaped hammers and the fixed anvil ring
Separation of composite materials
- Multi-stage application of stress cleans metals and separates out various materials
- Example of cable recycling: Efficient removal of the plastic sheathing from the conductor
Machine operation
- Optimum settings achieved thanks to adjustable rotor speed and annular gap
- Easy to retool
Easy maintenance and high availability
- Parts subjected to stress are protected by easily replaceable wear parts
- Materials used in wear parts are optimized for the relevant application
Unit ready for operation
- Ready-to-install unit consisting of machine and drive train mounted on a base frame
- Unimpeded access thanks to large cover that can be raised hydraulically and pivoted by 360°
Reliable greasing
- Low-maintenance, reliable operation thanks to a recirculating oil lubrication system with cooling and integrated monitoring
Vibration absorption
- Rubber spring elements absorb vibrations generated during operation
- An electronic vibration monitor causes the machine to shut down if excessive vibrations are registered
Video
Innovative fine processing of your material
Innovative fine processing of your material
BHS offers an established and optimized process for metal recovery from fine fractions. This consists of pre-sorting and the key process step of shredding, which is performed by a rotor impact mill, easily accomplishing multiple challenging processing tasks at once. The process then moves on to the steps of sorting via screens, standard separation, as well as magnetic and eddy current separation. Each plant is individually adapted to the customer’s requirements due to the large variance of the input material.
Technical systems
Rotor impact mill RPMV: Variety of applications
Operating principle of the RMPV (side view)
Rotor impact mill RPMV: Variety of applications
The feed material is loaded into the top center of the machine. When it impacts the rotor, the material is accelerated towards the outside by means of centrifugal forces; there, the horseshoe-shaped hammers engage it and throw it against the anvil ring, In the milling gap, it is crushed as a result of the impact and shearing forces. The material leaves the rotor through the gap and falls down through two outlet chutes.
Rotor impact mill RPMX: Perfect fine processing
Operating principle of the RPMV (top view)
Rotor impact mill RPMX: Perfect fine processing
The material is selectively transported into the gap between the anvil ring and hammer from above by means of the rotor cover plate. In this way, the full height of the grinding gap is utilized, resulting in a longer retention time and a higher stress frequency. An intense ball shaping effect is achieved in combination with a high circumferential speed, a narrow grinding gap of 4 to 6 mm and a specially toothed anvil ring.
Rotor impact mill available in two models
The RPMV is a rotor impact mill used in the recycling industry. The ball shaper, which has proven itself for many years in a wide range of applications in the recycling industry, sets a new standard with the RPMX. The RPMX rotor impact mill is a turbo-ball shaper. It is used in the reclamation of materials from fine fractions containing metal (such as stainless steel and cable strands) that had previously been considered difficult to process.
Rotor impact mill of type RPMV – the ball shaper
Rotor impact mill of type RPMV
Rotor impact mill of type RPMV – the ball shaper
The RPMV has proven itself in separating composites, crushing brittle components and shaping metals into balls with particle sizes from 5 to 30 mm.
Rotor impact mill of type RPMX – the turbo-ball shaper
Rotor impact mill of type RPMX with rotor cover plate
Rotor impact mill of type RPMX – the turbo-ball shaper
A higher circumferential speed and the considerably smaller grinding gap characterize the RPMX. This feature set makes it ideal for ball shaping and separating composite parts with particle sizes from 0 to 15 mm.
Advantages of the Rotor
- Replaceable crushing tools
The anvil ring elements are suspended on the mill housing (RPMV) or bolted on (RPMX). The horseshoe-shaped impact hammers are mounted to the rotor and are held on the rotor pegs by centrifugal force. Both the anvil ring and the impact hammers are easily replaced.
- Adjustable gap
A set of replaceable spacers is used to configure the ring gap. The ongoing wear and tear of the impact hammers causes the gap width to change; this can be easily corrected by replacing spacers in different sizes (shown in red in the illustration).
- Optimized service life
The rotor direction can be reversed, allowing both sides of the impact hammers to be fully utilized.
Spacers for increasing degrees of wear
Impact hammers of the rotor impact mill
Simplified replacement of the crushing tools
Both the anvil ring and the impact hammers can be easily
replaced. On the RPMV, the anvil ring elements are sus-
pended in the milling housing, and on the RPMX they are
firmly bolted in place. The optional mandrel and load hook
tools can be used for easy hammer replacement. This sig-
nificantly simplifies maintenance and reduces the physical
strain on operating personnel.
Optimized and improved impact hammers
For consistent output quality, a higher throughput rate and
significantly reduced wear, the impact hammers have been
continuously improved. To ensure this over the entire service
life, the size of the ring gap to the anvil ring and thus the
gap width can be effectively readjusted over the long term
by simply replacing spacers of different sizes as the impact
hammers wear
Options & accessories
Options & accessories
Rotor impact mill of type RPMX
Electro-hydraulic cover opening
An electrohydraulic lid opener can be installed as an option to ensure quick opening of the machine lid for maintenance and inspection purposes.
Installation in electrical terminal box
If required, all electrical wiring can be bundled in a terminal box for easy installation.
Intensive cooling
In the event of high ambient temperatures or if the material to be processed is hot, a supplementary lubrication unit featuring a larger storage volume and stronger cooling power can be provided.
Air cannon
In order to reduce material deposits in the outlet area, the mill can be optionally equipped with air cannons.
Crane
The use of a crane is recommended when replacing wear parts.
Control unit
To provide an alternative means of operation, the machine can be shipped with a PLC controller (including touch panel) and a frequency converter if required. This allows for autonomous operation and monitoring of the machine’s functions. The PLC controller can also be used to operate additional system components, such as in-/outlets, a dust removal system, a sorting unit, etc.
Steel structure
To complement the machine, we offer standardized or customized steel add-on solutions such as supports, platforms, railings, and stairs.
Plant technology
We are also able to provide you with complete system solutions that include, for example: Steel construction, bunker and dosing technology, feeding and draining/discharging technology, classifying and separation technology, as well as dust removal systems. We plan the system design in accordance with your requirements and comprehensively coordinate the project with you.
Technical specifications
Performance data
Performance data
| TYPE | Rotor diameter x height | Number of hammers | Circumferential speed (max.) | Drive power (max.) |
|---|---|---|---|---|
| RPMV 1113 | 1.150 x 135 mm | 8 pieces | 70 m/s | 132 kW |
| RPMV 1513 | 1.500 x 135 mm | 12 pieces | 70 m/s | 200 kW |
| RPMX 1116 | 1.150 x 160 mm | 8 pieces | 90 m/s | 250 kW |
| RPMX 1516 | 1.500 x 160 mm | 12 pieces | 90 m/s | 315 kW |
Dimensions and weights
Dimensions and weights
| TYPE | A | B | C | D | Weight 1) |
|---|---|---|---|---|---|
| RPMV 1113 | 4.600 mm | 2.000 mm | 2.700 mm | 406 mm | 7.700 kg |
| RPMV 1513 | 4.900 mm | 2.120 mm | 2.740 mm | 610 mm | 12.000 kg |
| RPMX 1116 | 4.600 mm | 2.000 mm | 2.790 mm | 406 mm | 8.500 kg |
| RPMX 1516 | 4.900 mm | 2.120 mm | 2.850 mm | 610 mm | 12.800 kg |
1) Weight for standard design without motor and accessories.
2) Depending on the drive power.
All specifications apply to the standard design. Technical data for customized designs may differ from the specified data. All technical data may change due to development. Subject to modification without notice.
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