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FIBERCARE® REFINING CASE STUDY
Refining Capacity Improvement & Refining Energy Reduction with FiberCare® on Fine Paper
Production at Mill 1
Case Study 1
Trial Situation
Mill targets: Increase refining efficiency
• Increasing refiner throughput
• Reducing refining energy
Mill problem: Lower Refining Capacity
Trial Situation
Paper grade: 120g/m2 offset paper
Machine speed: 150m/min
Furnish: 30% bleached softwood kraft pulp / 25% APMP
Aspen pulp / 45% wheat straw pulp
Enzyme treated pulp: Bleached softwood kraft pulp
Pulp and white water situation: •Pulp in Hydraulic Pulper: T = 20.3℃, pH = 7.56•White water: T = 18.7℃, pH = 7.89•Post-refiner Pulp: T = 25- 30℃
2 DDR
Refiners
FiberCare R
Taper Refiners
Pre-refining
Chest, 50m3
Post-refining
Chest, 50m3
Machine Chest,
50m3Pulper, 5m3
Enzyme: FiberCare R
Adding point: Pulper
Enzyme dosage: 110g/t
Enzyme treatment time: around 2 hours before refining
Trial Situation
Bleached softwood kraft pulp refining
• Before refining: 13ºSR
• After refining: 30-32ºSR,
12-12.5g (wet weight)
• Refiners: 1 set of taper refiner + 2 sets of DDR refiners
Trial Situation
Pre-trial FiberCare R
Taper refiner 160A 105A
1ST DDR refiner 208A 190A
2ND DDR refiner 200A 185A
Refining time 120min 73min
• Same refining pulp consistency: 3.2%
• Final refined pulp: 32ºSR, 12.2g
• No change in pipe valve openness
• Same amount pulp for refining: 1.6t
Trial Situation-Refiners
• Saved 132kwh/t refining energy with 0.11kg/t FiberCare R;
• Reduced 49% refining energy.
270
138
0
49%
0
50
100
150
200
250
300
Control FiberCare R
Refiner
energ
y c
onsum
ption,
kw
h/t
0
0.1
0.2
0.3
0.4
0.5
0.6
Energ
y r
educed
Refiner energy consumption, kwh/t Reduced, %
Trial Result-Refiner energy consumption
• Increased 9% breaking length with 0.11kg/t FiberCare R
3450
3760
0
9.0%
3000
3100
3200
3300
3400
3500
3600
3700
3800
Control FiberCare R
Bre
akin
g length
, m
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
Incre
ased
Breaking length, m Increased, %
Trial Result-Strength improvement
• Increased 4.2% tear strength with 0.11kg/t FiberCare R
480
500
0
4.2%
400
450
500
550
Control FiberCare R
Tear
str
ength
, m
N
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
Incre
ased
Tear strength, mN Increased, %
Trial Result-Strength improvement
0.11kg/t FiberCare R
Reduced 49% refining energy, saved 132kwh/t refining energy
Increased 9% breaking length
Increased 4.2% tear strength
Trial Conclusion
THANK YOU