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Titanium dioxide is a molecule composed of one atom of titanium and two atoms of oxygen. The manufacture of Titanium dioxide has two kinds: sulfuric acid method (Sulphate Process) and LvHuaFa (Chloride Process). 56% of them are in LvHuaFa products, the products of more than 70% are produced in the United States such as giant dupont titanium dioxide, other countries including China's titanium dioxide factory still give priority to sulfuric acid method such as Shanghai Titanos IndustryCo.,Ltd,the largest marketing channel company of chinese Titanium Dioxide.
Through the sulfuric acid method and LvHuaFa can get it. First,briefly introduce the Sulfuric acid method. Sulfuric acid method is to use titanium concentrates or acid soluble titanium slag and sulfuric acid solution reactions reaction, get oxygen titanium sulfate solution, via hydrolysis get partial titanium acid precipitation; Turn again into the kiln firing TiO2 output. Sulfuric acid method with intermittent method mainly operation, flexible production device, to open parking and load adjusting. But the process complex, need to nearly 20 way process step, every process step must be strictly controlled to produce the best quality product of titanium dioxide, and satisfies the pigment optimal performance. Sulfuric acid method can not only production sharp titanium type products, and can produce rutile type products.
In the process of sulfuric acid method through the following process:
1) Acid equations:
2)Hydrolysis equations:
3)Bleaching equations:
4)Finally equations :
Production flow chart of sulfuric acid method is shown below:
The other production of Titanium dioxide is LvHuaFa. Relative to Sulfuric aci dmethod,LvHuaFa is difficult to research and develop .Then ,how to make Titanium dioxide through LvHuaFa? LvHuaFa is will rutile or high titanium slag powder mixed with coke after high temperature chlorinated production four chlorinated titanium, by high temperature oxidation, then the filtering, water, dry, crushing get titanium dioxide products. LvHuaFa can only production rutile type products.
LvHuaFa advantage is process short, easy to expand production capacity, a high degree of automation, relatively low energy consumption, "three wastes" less, can get high quality products. Its defect is large investment, equipment structure is complex, the material requirements of high, high temperature resistance, corrosion resistance, the device, difficult to repair, research and development is difficult. Superficially,people used to think that the quality of the product in LvHuaFa more outstanding.
Regardless of which kind of method,sulfuric acid method or LvHuaFa ,the manufacturers of titanium dioxide must pay attention to some matters during the production of Titanium dioxide.For example,which raw materials is toxic,which is not.
Titanium dioxide could be produced through three different methods
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