Introduction to Refining Technology

1
Introduction to Refining Technology
2
Objectives

• Understand how refiners are involved in the pulp
  and paper industry
• Become aware of the various applications and
  types of refiners in the pulp and paper industry
• Understand what products JL offers to the
  refining process

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Basic Types of Refiners

• High Consistency
• Medium Consistency
• Low Consistency

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High Consistency Refiners

• 20 and higher (max. is about 55)
• High speed/Larger motors
• (1200-2400 RPM/ 1000kW-40mW)
• Applications
• Mechanical Pulp
• Reject Refining
• Deshive Refining
• Dispersion

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Why do we use Refiners -High Consistency

• Chip Breakdown/Pulp Manufacturing
• Deshive - Shive removal with minimal fiber length
  loss
• Reject - Creation of usable pulp from fiber
  bundles

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Medium Consistency Refiners

• 6 - 20 consistency
• High Speed (900-1800 RPM)
• Usually smaller motors than HICO
• Applications
• Blow Line
• Deshive
• Sack Kraft

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Why do we use Refiners -Medium Consistency

• Blow Line - completion of chip breakdown
• Deshive - shive removal

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Low Consistency Refiners

• 3 - 6 consistency
• Low connect power (lt High or Med Cons.)
• Applications
• Hot Stock
• Reject
• Paper Mill

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Why do we use Refiners - Low Consistency

• Change the fiber structure
• Impact sheet structure and properties

• Tensile
• Burst
• Opacity
• Formation
• many others

• Tear
• STFI
• Freeness
• Plybond

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Types of Refiners

• Single Disc High Consistency
• Twin-Disc High Consistency
• Counter Rotating Disc High Consistency
• Conical Disc High Consistency
• Double Disk/MultiDisk Low Consistency
• Single Disk LowConsistency
• Conical Low Consistency
• Deflakers

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High Consistency Refiners (HICO)
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Single Disc High Consistency Refiners
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Twin-Disc High Consistency Refiners
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Counter-Rotating Disc High Consistency Refiners
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Sunds Conical Refiner
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Conical Disc (CD) High Consistency Refiners
Motor
Feed Screw
Feed Motor
Refiner Plates (Conical Zone)
Refiner Plates (Flat Zone)
Stator
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Hico - Products Offered

• High Consistency Refiners
• Cast plates

• Flinger nuts, C rings, R rings for some refiners
• Conical fillings for CD70, CD76 but not new
  CD76-II

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LOW Consistency Refiners (LOCO)
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Double Disc Thru Shaft Style (Sprout, Black
Clawson, etc.)
Stator
Refiner Plates
Rotor
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Double Disc Cantilevered Style(Beloit, Voith,
Black Clawson, etc.)
Stator
Single feed
Rotor
Refiner Plates
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MultiDisc Low Consistency Refiners (Beloit)
Rotor
Stator
Single feed
Refiner Plates (also above)
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Single Disk (Sunds, Sutherland, Bauer, etc.)
Rotor
Feed
Stator
Refiner Plates
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Conical Refiners (Sunds, Claflin, Beloit, Black
etc.)
Stator
Feed
Rotor
Refiner Filling
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Deflaker - (Voith, Black Clawson,etc.)
Stator
Feed
Refiner Plates
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LOCO - Products Offered

• Double/Single Disk Low Consistency
• Cast Plates
• Remachinable Plates (Beloit only)
• Fabricated full circle plates
• Fabricated UniRotor plates (double disk only)
• Conical Low Consistency
• Fabricated fillings
• Some cast fillings for Sunds ConFlo

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LOCO - Products Offered (cont)

• Black Clawson Deflakers
• Cast Fillings (some sizes)
• Some other OEM fabricated fillings
• Voith Deflakers

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Where are these refiners located?
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Mechanical Pulp Process (HICO Refining)
Chips
Primary Refining
Latency Chest
Secondary Refining
High Cons. Refining
High Cons. Refining
Screening
Thickening
Reject Refining
High Cons. Refining
Cleaning
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Unbleached Chemical Pulp Mill
Digester
Blow Line Refiner
Blow Tank
or Fiberizer MED. Cons.
Hot Stock Refining
Screening
LOW Cons.
Reject Refining
LOW to HIGH Cons.
MED to HIGH Cons.
Deshive Refining
Washing
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Semi-Chemical Mill
Blow Line Refiner
Deshive Refining
Digester
Washer
MED Cons.
MED to HIGH Cons.
Storage or Primary
Low Cons. Refining
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Bleached Chemical Pulp Mill

• Usually no refiners
• May be reject refiners (low to high cons.)

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Paper Mill Refining - Typical
Refiner
Refiner
Softwood Low Consistency
Refiner
Refiner
Tickler Low Consistency
Refiner
Hardwood Low Consistency