钛白粉基础知识share.ppt

二氧化钛制造工艺简介
两种不同晶型的钛白粉
锐钛型
金红石型
为什么要用钛白粉?
因为:
1. Optical reason光学原因
提供颜色和最佳遮盖
Provide color & best hiding (Highest RI)
2. Physical reason物理原因
吸收紫外光保护树脂
Absorb UV to protect ambient media
3. Economical reason经济原因
最佳非迁移性无毒无机紫外光吸收剂
Best Non-migratable and non-toxic
anic UV absorber ,
TiO2 Manufacturing Processes
硫酸法
氯化法
Pigment
Base
Wet treatment
Filtration
Washing
Drying
Grinding
Finished
TiO2
Chlorination
Purification
Oxidation
Rutile,Synthetic Rutile,Slag, Ilmenite
Coke
Chlorine
Oxygen
Chlorine
Metal
Chlorides
Digestion
Digestion
Ilmenite
Sulfuric Acid
Slag
Reduction
Clarification
Crystallization
Hydrolysis
Clarification
Calcination
Waste
Acid
Copperas
Scrap Iron
Insoluble Solids & Waste Acid
FeSO4 - 7H2O
Filtration
Waste Acid
Waste
H2SO4
(3%)
Ilmenite
Digestor
(Batch)
Solids
Thickener
Solids Filter
and
Centrifuge
Copperas
Filter
Vacuum
Evaporator
Filter and
Wash Tank
Pigment
Coating
Treatment
Pigment
Filtration and
Washing
Dryer
Micronizers
Bleaching
Reactor
108°C
TiO2 Solids
Filter and
Wash Tank
Waste
H2SO4
Evaporative
Crystallizer
Sulfuric
Acid
Water
Insoluble
Solids
Copperas Solids
(FeSO4 - 7H2O)
Titanyl
Sulfate
Hydrolyzer
TiO2
Calciner
Pigment
Grinding
Storage,
Blending and
Shipping
Coating
Reagents
TiO2 Pigment
Recycle
H2SO4
(18%)
Ilmenite
Ore
Sulfuric
Acid
Hydrous TiO2
Precipitate
50°C
Seed Nuclei
and Zinc Metal
950°C
Ball Mill
(-325 mesh)
150C
Scrap Fe
Salt Treatment
TiO2硫酸法工艺
TiO2 氯化法工艺
Hi-Temp.
Fluidized Bed
Reactor
Cl2
Purification
Steps
Coke
Bin
Petroleum Coke
Oxidation
Reactor
Vent
Landfill
Quench Tank
Spray
Condensor
Coke/Ore Recovery
Neutralization
Recovered
Coke & Ore
Crude TiCl4
MeClx
Solids
Purified TiCl4
O2
Wet Treatment
Drying/Micronizing
TiO2 Ore Concentrate
Packaging
Ore Bins