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TiO2 Post-Treatment

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TiO2 Post-Treatment

Version: 190329

Page 2

General Process

Post-Treatment

(TiO2 Pigment)

Chloride or Sulfate Process

(Base Material)

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TiO2 Post-Treatment

Version: 190329

Page 3

Overview

Sand Milling

Wet Treatment

Filtration

and

Washing

Drying

Steam Milling

Storage

and

Packing

Packed Finished

Titanium

Dioxide

Pigment

(TiO2)

Base Material

to Post-

Treatment

Waste

Water

Condensate

WasteBy-ProductEducts IntermediatesSymbols:

Overview

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TiO2 Post-Treatment

Version: 190329

Page 4

Coarser

Particles

Sand Milling

Phosphate

Caustic Soda (NaOH)

Sand Mills

Hydrocyclones

Water (H2O)

Base Material

(TiO2)

to

Wet Treatment

Milled Base Material

Suspension

(TiO2 and H2O)

Overview

Conditioning

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TiO2 Post-Treatment

Version: 190329

Page 5

Wet Treatment

Sodium Aluminate (NaAl(OH)4)

Aluminum Sulfate (Al2(SO4)3)

Sodium Silicate (Na2SiO3)

Titanyl Chloride (TiOCl2)

Titanyl Sulfate (TiOSO4)

Zirconyl Chloride (ZrOCl2)

Zirconyl Sulfate (ZrOSO4)

Phosphoric Acid (H3PO4)

Caustic Soda (NaOH)

Sulfuric Acid (H2SO4)

SteamTreatment

Vessel

from

Sand Milling

to Filtration

and

Washing

Treated Suspension

(TiO2 and H2O)

Overview

Milled Base

Material

Suspension

(TiO2 and H2O)

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TiO2 Post-Treatment

Version: 190329

Page 6

Filtration and Washing

Compressed

Air

Waste Water

Washed and Treated

Filter-Cake

(TiO2 and H2O)

Filter Presses

from

Wet TreatmentTreated Suspension

(TiO2 and H2O)

to Drying

Demineralized

Water (H2O)

Condensate

from

Steam Milling

Overview

Filter Presses

Feed Tank

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TiO2 Post-Treatment

Version: 190329

Page 7

Drying

Fuel

(Natural Gas, DME)

Dried

Titanium Dioxide

(TiO2)

Feed Bin of Dryer

Swirl/Spin

Flash Dryer

Bag Filter

of Dryer

Washed and Treated

Filter-Cake

(TiO2 and H2O)

from Filtration

and Washing

to

Steam Milling

Overview

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TiO2 Post-Treatment

Version: 190329

Page 8

Steam Milling

Steam

Organic

Treatment,

TMP, Silicone Oil

Finished Titanium Dioxide

Pigment (TiO2)

Feed Bin

Steam Mill

Steam

Condensation

Dried

Titanium Dioxide

(TiO2)from Drying

to Filtration

and

Washing

Condensate

Overview

Dust

Collecting

System

to Storage

and

Packing

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TiO2 Post-Treatment

Version: 190329

Page 9

Storage and Packing

Packed Finished

Titanium

Dioxide

Pigment

(TiO2)

Storage

Finished Products

Finished Titanium Dioxide

Pigment (TiO2)from

Steam Milling

Overview

Silos

Packing