1. April 26th 2013 Frank-PTI Laboratory Refiner LR 40 Type Voith
ELOF HANSSON TECHNOLOGY DAYS
April 26th Frank-PTI Laboratory Refiner LR 40 Type Voith
Gunnar Lindblad

2. Laboratory Refiner LR40 Laboratory Refiner LR1
VPR Chapter 09 No 0653 Ed 01

3. Laborrefiner LR40: System
Water
Pulp
VPR Chapter 09 No 3475 Ed 01
You can see the test stand in the top corner.
the furnish is desintegrated in the pulper
fed by mohno-pump to the refiner
recirculated to chest
depending on energy input sampling will be started
sample amount will be taken into account.
process runs full automatically.
a short view to the table 
Mono-
Pump
Pulper
Refiner
Sampling position
with balance

4. Laborrefiner LR40: Versuchsstand1
User interface 2
2. Pulper 3
3. Sampling Point 4
4. Electrical cabinet
5. Refiner 5
VPR Chapter 09 No 3478 Ed 01 
As required for research purposes there are a lot of fillings avaialble 

5. Laboratory Refiner: Refiner segments
VPR Chapter 09 No 2052 Ed 01
5 sec 

6. Laboratory Refiner LR40 Technical Data Noice level
Dimension and weight
Floor Unit
Control cabinet
Connections
Pulp Consistency
Balance range
Max. 6 Samples
< 76dBA
BxTxH: 2,37 x 0,9 x 1,8m
Weight: 1300kg
BxTxH: 1,2 x 0,6 x 2,0m
Weight: 360kg
400V / 50Hz
Compressed Air > 3 bar
Fresh water
3 - 5,5 %
g otro
(Total test volume 12l)
VPR Chapter 09 No 0652 Ed 03

7. Laboratory Refiner LR40 Application
• grinding of primary and secondary fibers
• Delivery and quality control
• Research and Development
Features
• Table Model • Modular design allows use of disks and cone segments • Easy and quick segment changes • Very simple, menu-driven operation • Fully automatic sampling • High accuracy • Excellent repeatability • Evaluation of all data through an integrated computer • Operation and control based on parameters and measurements, which are also
used in the industrial process
VPR Chapter 09 No 0653 Ed 01

8. Laboratory Refiner LR 40 - Photos

9. Laboratory Refiner LR 40 – without front cover

10. LR 40 User interface
Front view
Inside view

11. LR40 – Torque measurment

12. Sampling – Valve assembly
Back pressure valve
Sample valve
Turntable
Drain valve

13. Sampling - Balance
Balance loadcell
Turntable
Turntable
Light sensor

14. LR40 – Distribution box on the table and solenoid valves

15. LR40 – Segment change
Spindle
Stator

16. LR40 – Cabinet and cableing in the table

17. Cable, with direct entry to the cabinet

18. Technology

19. Reproducibility with LR-1 freeness measurements
Bleached Sulfate Pulp from Pine
Freeness value [SR
Laboratory Refiner LR-1
1 trial
2 trial
3 trial
Energy

20. Repeatability with the LR-1 strengths
Burst Index [kPam2/g]
Tear Index [mNm2/g]
SR value {SR]
Tear resistance [Nm/g]
Bleached Sulfate Pulp from Pine 2,1 J/m
1 trial
2 trial
3 trial

21. Comparison between LR-1 and the PFI Mill
Tear Index [mNm2/g]
Burst Index [kPam2/g]
SR value {SR]
Tear resistance [Nm/g]
Laboratory refiner LR-1
PFI-Mill
Bleached Sulfate Pulp from Pine 2,1 J/m

22. Comparison between LR-1 and a Double disk refiner
Strength Development
Tear Index [mNm2/g]
Burst Index [kPam2/g]
SR value {SR]
Tear resistance [Nm/g]
Bleached Sulfate Pulp from Pine 2,1 J/m
Laboratory refiner LR-1
Double Disk refiner DSR1

23. Comparison with Industrial refining: Specific energy and Tear index60 20 40 60 80 10 30 50
SR -Wert [SR]
Reisslängenindex [mN/g] 50
SR- Wert [SR]
Freeness value [SR 40
Tear Index [mNm2/g] 30 20 10
VPR Chapter 09 No 3511 Ed 01
At the left handside we see the SR-value as a function of net specific energy. The TwinFlo results are from the previous trials. 
the blue circles are the results with the LR40
There is a good correlation. 
the second diagram shows the Tensile index versus the SR-value.
The lab refining has a slight better strength development, compared to industrial size. 
100
200
300
400
Freeness value [SR
Refiner Energy [kWh/t]
Pulp: Acacia
Laboratory Refiner
TwinFlo

24. Comparison with Industrial refining: Fiber length and spec. Volume
0.75
1.0
1.5
2.0
2.5 10 20 30 40 50 60
Freeness value [SR]
Spec.. Volume [cm3/g]
0.70
0.65
Mean Fiber length [mm]
0.60
0.55
0.50
VPR Chapter 09 No 3512 Ed 01
even with the higher tensile the lab equipment creates shorter fibres at same freeness 
there is quite no influence to the development of bulk, painted against SR value.  10 20 30 40 50 60
Freeness value [SR]
Pulp: Acacia
Laboratory Refiner
TwinFlo