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Causticizing & White Liquor Preparation

Slaker, grits classifier, disc filter, agitators and lime-slurry tanks — filter cloth, drums and corrosion control.

ScopeSlaker · grits classifier · disc filter · agitators · lime slurry tanks

1 · Equipment Overview

FunctionCausticize green liquor into white liquor.
CompositionSlaker, classifier, disc filter, agitators.
MediaGreen / white liquor, lime milk.
Key equipmentDisc-filter drum, agitator blades, screw conveying.

2 · Maintenance Process

Drain & cleanDrain, clean and isolate.
Open & inspectOpen disc filter; inspect drum and filter cloth.
Cloth renewalReplace filter cloth; tension wire strips.
Drum thicknessUT corrosion survey of the drum; mark defects.
AgitatorsInspect blades; replace worn elements.
Grits screwInspect and repair lime-grits conveying trough.
De-scale & measureDe-scale tanks and piping; measure wall thickness.
Bearings & sealsReplace bearings and seals.
Reassemble & trialRefit and water-run.
Quality checkVerify white-liquor clarity and filtration efficiency.

3 · Key Process Photos

Filter drum rail zone
Filter drum rail zone
Disc filter radial spokes
Disc filter radial spokes
Drum wear and hole defects
Drum wear and hole defects
Drum inner-wall corrosion
Drum inner-wall corrosion
Hole-wear close-up
Hole-wear close-up
Lime grits trough interior
Lime grits trough interior
Agitator blades in tank
Agitator blades in tank
Disc filter end assembly
Disc filter end assembly

4 · Acceptance & Handover

Filter cloth intact and reliably tensioned; drum corrosion holes within limits; agitator and screw run smooth; tanks leak-free; white-liquor clarity and filtration efficiency to target.

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