Grinding oil-/ metal swarf recycling units GRU-60 to GRU-3000

Grinding oil-/ metal swarf for small or high quantities of grinding sludge. 

 

Do you want to recover your precious metal and cooling lubricant feedstock? - We offer the solution:

The solvent extraction units of the GRU series have been designed for the de-oiling of metal swarfs. With this units metal swarfs can be de-oiled up to a residual oil content of 0,01%.

First, the grinding oil mixture is flooded with solvent. Then, the oils are extracted from the solid particles using upflow classification and/ or supsension. The solvent/ cooling lubricant mixture, the so-called remains of the extraction, is separated and treated using vacuum distillation so that after the process the solvent as well as the cooling lubricant is available for reuse.

The GRU series is equipped with a conical vessel* and can be installed in EX-zones 1 or 2 due to it's explosion protected design.

* On request, the GRU also can be delivered with a horizontal lying vessel with extraction filter baskets.

 

Distillation-/ extraction unit
 
Conical extraction vessel without baskets
Continous, freely adjustable level measurement between 50% and 95%
Either circulation pump or agitator in spark free design for suspension of solid particles
Pneumatic -filling slider with electro-pneumatic -control valve
Pneumatic -discharge slider with electro-pneumatic -control valve
Safety closure with O-ring seal
Cleaning and maintenance aperture in manhole version ²
Nitrogen flooding with heating for drying of the metal swarfs
Stainless steel fine filter unit, filter fineness 200-20µm
Stainless steel fine filter unit, filter fineness 200-5µm
Horizontal lying vessel for extraction filter baskets
Extraction filter baskets, filter fineness 200-5µm

 = Standard,   = Optional ² from unit size 400l and above

Vacuum unit
 
Vacuum pump in  -design
Liquid ring vacuum pump, up to 35mbar, low maintenance
High-performance chemistry diaphragm pump, up to 10mbar
Dry running high-performance pump, up to 1mbar, low maintenance

 = Standard,   = Optional

Heating
 
Heating in  -design
1 to 3 stage, PID-controlled heat carrier heating
Redundant temperature and heating monitoring
Heat carrier: thermal oil
4 and multistage, PID-controlled heat carrier heating
Heat carrier: hot water
Heat carrier: steam

 = Standard,   = Optional

Frame variants
 
Anodized, conductive aluminum profile frame 1
Including covering panels 1
Welded, conductive stainless steel frame
Including covering panels 1
Powder coated, conductive steel frame ²
Galvanized, conductive steel frame

 = Standard,   = Optional 1) up to unit size 300l 2) from unit size 400l and above

Safety/ system integration
 
Explosion protection class EX II 3 G c IIA T3 (with inerting and suction)
Inerting unit
Suction at vessel inlet and discharge
Explosion protection class EX II 2 G c IIA T3 (without inerting/ suction)
External, single- or double walled container for fresh/ contaminated goods
Safety collecting drip pan according to WHG
Integration into existing plants/ systems
System version as combined extraction and distillation unit

 = Standard,   = Optional

Control system
 
Fully automatic, PLC operated system
Designed for monitoring free 24h operation
Delay timer for night-/ weekend operation
Including 15m cable loom (from unit to switching cabinet)
Additional extraction programs for different grinding sludges/ metal swarfs
At unit  
     On-/ off-switch
      -operation indicator lamp
     Emergency stop palm button
At switching cabinet  
     Graphics display and operating terminal at cabinet door, monochromatic, 16 gradations, touchscreen
     Operation indicator lamp
     Error indicator lamp
     Emergency stop palm button
     PID-controller & display
50m cable loom
At unit  
      -error indicator lamp
     Graphics and operating terminal in  -design
At switching cabinet  
     Graphics and operating terminal with color display, touchscreen

 = Standard,   = Optional

Service
 
24 months warranty
Pan-european 24h on-site service
Express shipment of spare parts
Up to 60 months warranty
Remote maintenance through automation device or modem
Support at the creating of the explosion protection document

 = Standard,   = Optional

Outstanding characteristics
 
Wetted parts in stainless steel, including double-jacket for heat carrier
Stainless steel heat exchanger, welded

 = Standard,   = Optional

 

Further options on request

 

Direct and automatic process
  • Automatic feed of the grinding sludge/ swarfs
  • Automatic discharge of the de-oiled metal swarfs
 
Conical extraction vessel
  • Easy and complete discharge
  • Optimal heat transfer through direct contact to the heated vessel surface
  • Optimized drying of the metal swarfs

 

Upflow classification and/ or suspension of solid particles
  • Minimized residual oil content (up to 0,01%)
  • Reduced extraction duration
  • Optimized and even de-oiling also with angled or unfavourable swarf shapes

 

Less handing effort
  • No elaborate insertion and discharge of the metal swarfs
  • No elaborate equipping, transport of the extraction filter baskets
  • Minimized cleaning effort, since cleaning of the filter baskets is not necessary

 

Systems engineering according to european regulations
  • Highest operational safety

 

Economic
  • Optimized throughput
  • Lower personnel costs
  • Lower operational costs
 
Safety
  • No risik at discharge of explosive metal powders
  • No elaborate discharge airlock for filter baskets necessary
 
 
 

  • Overall capacity (l)
  • Operating capacity min.-max. (kg)
  • Extraction rate (kg/h) (1)
  • Process pressure (bar)
  • Process temperature max. (°C) (2)
  • Thermal oil heating
  • Protection class with inerting and suction
  • Power input normal operation ca. (kW)
  • Power input heating (kW)
  • Voltage (3)
  • Frequency (3)
  • Coolant requirement (m³) (7)
  • Width (mm)
  • Height (mm) (4)
  • Depth (mm)
  • Weight ca. (kg)
  • Related vacuum unit
  • Vacuum pressure max. (mbar) (5)
  • Max. suction capacity (m³/h) (6)
  • Weight ca. (kg)

GRU-60

  • 60
  • 20-30
  • 3-15
  • -1,0 to +0,5
  • 100°
  • integrated
  • EX II 3 G c IIA T3
  • 4
  • 5
  • 230/ 400V, 3PH
  • 50Hz
  • 1,0
  • 590
  • 1600
  • 1500
  • 350
  • 35
  • 14
  • 30

GRU-265

  • 265
  • 100-110
  • 10-20
  • -1,0 to +0,5
  • 100°
  • integrated
  • EX II 3 G c IIA T3
  • 8
  • 10
  • 230/ 400V, 3Ph
  • 50Hz
  • 1,8
  • 850
  • 1600
  • 2000
  • 650
  • 35
  • 18
  • 65

GRU-420

  • 420
  • 150-180
  • 15-30
  • -1,0 to +0,5
  • 100°
  • integrated
  • EX II 3 G c IIA T3
  • 16
  • 20
  • 230/ 400V, 3Ph
  • 50Hz
  • 2,4
  • 2400
  • 3200
  • 1800
  • 980
  • 35
  • 30
  • 65
  • Overall capacity (l)
  • Operating capacity min.-max. (kg)
  • Extraction rate (kg/h) (1)
  • Process pressure (bar)
  • Process temperature max. (°C) (2)
  • Thermal oil heating
  • Protection class with inerting and suction
  • Power input normal operation ca. (kW)
  • Power input heating (kW)
  • Voltage (3)
  • Frequency (3)
  • Coolant requirement (m³) (7)
  • Width (mm)
  • Height (mm) (4)
  • Depth (mm)
  • Weight ca. (kg)
  • Related vacuum unit
  • Vacuum pressure max. (mbar) (5)
  • Max. suction capacity (m³/h) (6)
  • Weight ca. (kg)

GRU-1600

  • 1600
  • 600-650
  • 65-75
  • -1,0 to +0,5
  • 100°
  • separate (8)
  • EX II 3 G c IIA T3
  • 42
  • 50
  • 230/ 400V, 3PH
  • 50Hz
  • 4,8
  • 2800
  • 3600
  • 1800
  • 1240
  • 35
  • 48
  • 140

GRU-2000

  • 2000
  • 700-750
  • 70-85
  • -1,0 to +0,5
  • 100°
  • separate (8)
  • EX II 3 G c IIA T3
  • 50
  • 60
  • 230/ 400V, 3Ph
  • 50Hz
  • 5,4
  • 2800
  • 3800
  • 1800
  • 1630
  • 35
  • 48
  • 165

GRU-3000

  • 3000
  • 1000-1100
  • 100-120
  • -1,0 to +0,5
  • 100°
  • separate (8)
  • EX II 3 G c IIA T3
  • 65
  • 80
  • 230/ 400V, 3Ph
  • 50Hz
  • 7,2
  • 3200
  • 4500
  • 2000
  • 2000
  • 35
  • 60
  • 180

(1) depending on solvent, oeprating conditions, level of contamination and water content, (2) higher temperatures possible, (3) further on request, (4) depending on residue container, (5) vacuum system for up to 1mbar possible, (6) process liquid H2O at 15°C, at 50Hz, (7) at max. 15°C, (8) integratable on request

The technical data stated above are to regarded as orientation, as every unit is built and developed according to your wishes and requirements. Changes, errors and omissions excepted. Photos can differ from actual quotation.

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