The document discusses de-inking processes used in papermaking. De-inking removes inks and other substances from recycled fibers so they do not interfere with papermaking or the final paper properties. The process first detaches inks from fibers using flotation technology for high fiber yield and simple handling. A deaerator cyclone then removes air and recovers usable fibers from the foam while achieving high brightness and cleanliness in the recovered paper stock.

1. The purpose of de-inking is to remove the printing inks
and other substances like stickies that might effect the
paper making process or the final properties of the paper.
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DEINKING SYSTEM
the refining people

2. In a deinking process ,the ink should be first detached
from the fiber. Flotation technology with high efficiency
provides high yield of fibers and simple handling with
maximum operating reliability. A deaerator cyclone
removes air from the stock and usable fiber is recovered
from the foam.
Salient Features
• Highest possible degree of
brightness is achieved
• Improved optical cleanliness
in recovered paper stock
• No sizing restrictions
• Single level control loop
operation
• Optimized flotation yield
at secondary stage without
loss of brightness and cleanliness
• Very low fiber loss in the
de-inking process as the foam
is treated in a cascade process
• High percentage of ash in
reject resulting in low fiber losses
DEINKING SYSTEM
Injector
Bubble
AirAir Intake
Pulp +
Deinking
Chemical

3. DEINKING SYSTEM
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Inlet Pipe
Shower Pipe
Foam
Outlet
Accept
Flotation Cell