1. NORDBERG LT1213
application guide lines

2. LT1213 CAN BE USED FOR CRUSHING NATURAL ROCK OR RECYCLING MATERIAL
IMPACTOR ADVANTAGES
HIGH REDUCTION RATIO
EXCELLENT END PRODUCT SHAPE
HIGH CAPACITY
SAME UNIT CAN BE USED
AS A PRIMARY AND AS
A SECONDARY CRUSHER
VARIOUS END PRODUCTS CAN
BE CRUSHED WITH ONE CRUSHING
STAGE
RECYCLING (SEPARATE THE STEEL
FROM THE END PRODUCT)
FINE PRODUCT
IMPACTOR DISADVANTAGES
NOT ECONOMICAL TO CRUSH
ABRASIVE MATERIALS
CAN’T BE USED FOR CRUSHING
VERY HARD MATERIALS

3. LT1213 - CRUSHING NATURAL ROCK
FEED MATERIAL LIMITATIONS
AVERAGE BOND WORK INDEX
LESS THAN 16
MAXIMUM IMPACT WORK INDEX
LESS THAN 23
INDICATIVE ABRASSION INDEX
LIMITS FOR ECONOMICAL OPERATION
180 g/t, MANGANESE STEEL HAMMERS
230 g/t, MARTENSITIC STEEL HAMMERS
550 g/t, CHROMIUM CAST IRON HAMMERS
TYPICAL ROCKS
-LIMESTONES, DOLOMITIC LIMESTONE,
GYPSUM,TALC,CHALK,MARBLES,MARL,
SCHISTS,SLATES
THREE SPEED RANGE 450, 520, 600

4. LT1213 - CRUSHING RECYCLING MATERIALS
TYPICAL RECYCLING MATERIALS
CONCRETE WITH AND WITHOUT REBARS
MIXED DEMOLITION MATERIAL-CONCRETE,
BRICKS,WOOD,STEEL…
ASPHALT

5. PRE-SORTING OF THE FEED MATERIAL
CRITICAL FOR SUCCESSFUL RECYCLING OPERATION
BREAKING DOWN THE OVER SIZE OF THE FEED MATERIAL WILL INCREASE THE CAPACITY
UNCRUSHABLE MATERIALS MUST BE PULLED OUT FROM FEED MATERIAL
MAX. RE-BAR DIAMETER 19 mm AND LENGTH 1000 mm

6. LT1213 - PROCESS PARAMETRES
FEED CAPACITY
SETTING
HAMMER CONFIGURATION
FOUR HAMMERS
SLOTTED HAMMERS
ROTOR SPEED
HAMMER MATERIAL
POWER CONTROL

7. SETTING - EFFECT TO PRODUCT CURVE
ATTACHED PICTURE SHOWS THE EFFECT TO PRODUCT
CURVE WHEN SETTING IS CHANGED FROM 100 mm TO 30 mm
REDUCTION RADIO INCREASE
POWER DRAW INCREASES FROM 149 kW TO 212 kW
THE 90% POINT MOVES FROM 120 mm TO 65 mm 90
Feed curve

8. ROTOR SPEED - EFFECT TO PRODUCT CURVE
ATTACHED PICTURE SHOWS THE EFFECT TO PRODUCT CURVE WHEN ROTOR SPEED IS CHANGED FROM 450 RPM TO 750 RPM
POWER DRAW INCREASES FROM 84 kW TO 217 kW
THE 90% POINT MOVES FROM 100 mm TO 50 mm
AMOUNT OF -10 mm INCREASES FROM 30% TO 45%
EFFECT OF ROTOR SPEED TO HAMMER LIFE
EXAMPLE FROM FRENCH QUARRY
-ABRASSIVITY INDEX 1300 g/t
-SPEED DROPPED FROM 650 RPM TO 400 RPM
-HAMMER LIFE INCREASED FROM 50 HOURS TO 250 HOURS 90
Feed curve

9. HAMMER CONFIGURATION 4 HAMMERS SLOTTED HAMMERS HEIGHT LIMIT FOR
CHANGING HAMMERS
60 mm
4 HAMMERS
SLOTTED HAMMERS

10. NUMBER OF HAMMERS EFFECTING ON PRODUCT CURVE
90% POINT IS 80 mm WITH FOUR OR TWO HAMMERS
AMOUNT OF -50 mm DECREASES FROM 64% to 61%
Hard rock
Speed 450 rpm
Setting 90 mm
High capacity 90

11. QUALITIES OF HAMMERS MANGANESE STEEL
The only quality enabling to crush without breakage
Concrete 50 to 100 hours
Demolition 40 to 200 hours
Asphalt 40 to 150 hours
MARTENSITIC STEEL
With same risks of breakage according to the materials processed and reduction requested.
Resists better to the wear than manganese
Concrete 60 to 150 hours
Demolition 48 to 300 hours
Asphalt 48 to 225 hours
CHROMIUM CAST IRON
Good for the asphalt processing if there is not tramp iron.
High risks of breakage in concrete and demolition but the financial balance can be
positive if the customer is aware of such risks and accepts them.
Concrete 150 to 400 hours
Demolition 120 to 800 hours
Asphalt 120 to 600 hours

12. FEED CAPACITY - EFFECT TO PRODUCT CURVE
WHEN FEED CAPACITY IS INCREASED END PRODUCT CURVE
WILL BE SLIGHLY COARSER
WHEN FEED CAPACITY IS INCREASED FROM 50 TPH TO 250 TPH
POWER DRAW IS INCREASED FROM 61 kW TO 214 kW

13. AUTOMATIC FEEDER CONTROL
ADJUSTABLE FEED CONTROL
ADJUSTABLE POWER LIMITS
ENABLE TO STABILIZE THE MATERIAL FLOW TO FOLLOWING PROCESS
Example 2
Example 3
Example 1

14. SUMMARY
Slotted

15. NORDBERG LT1213 APPLICATIONS

16. Customer: Gebr. Hanssen BV
Customer segment: recycling contractor
Country: Netherlands
Typical feeds: concrete,asphalt,mixed demolition debris
Typical products: concrete -40 mm (nominal capacity 180 t/h)
asphalt -20 mm (nominal capacity 100 t/h)

17. Customer: Brabant BreCom bv
Customer segment: recycling contractor
Country: Netherlands
Typical feeds: concrete,asphalt,mixed demolition debris
Typical products: concrete -40 mm (nominal capacity 180 t/h)
asphalt -20 mm (nominal capacity 100 t/h)

18. Customer: Wimmer&Wecks
Customer segment: quarry and contracting
Country: Germany
Typical feeds: hard stone, recycling
Typical products: in customers quarry -50 mm, average capacity
280 t/h, bond index 22,4 kW/t, shatter
index 41, dolomite, feed size -500 mm

19. Customer: Kurt Eberle ag
Customer segment: recycling contracting
Country: Switzerland
Typical feeds: asphalt, concrete
Typical products: asphalt -20mm, capacity 100 t/h %
oversize

20. Customer: Hagedorn Recycling GmbH
Customer segment: recycling contractor
Country: Germany
Typical feeds: Mixed recycling material reinforced concrete, asphalt, bricks,
top soil, rock mm
Typical products: size 0-8 mm 8-45mm 45-mm / 150 mtph

21. Customer: Simmerather Recycling GmbH, Stephan Brown
Customer segment: recycling contractor
Country: Germany
Typical feeds: Mixed recycling material concrete, asphalt, rock, bricks, top soil
0-700 mm
Typical products: size 0-4 mm 4-45mm mm / 25 mtph

22. Customer: Eckl
Customer segment: Aggregates Contractor
Country: Germany
Typical feeds: Limestone mm
Typical products: size mm / 183 mtph

23. Customer: Baumaschinen Alfred Plötz
Customer segment: Aggregates Contractor
Country: Germany
Typical feeds: Granite mm
Typical products: size 0-32 mm / 130 mtph

24. Customer: Wimmer&Wechs
Customer segment: Aggregates Contractor
Country: Germany
Typical feeds: Gravel mm
Typical products: size 0-32 mm / 260 mtph