Titanium dioxide, molecular formula TiO2, relative molecular mass 79.90g / mol, naturally present in the anatase and rutile titanium ore in. Titanium dioxide as a white powdery solid, inert pigment, non-toxic, free from climatic conditions, has a strong covering force, is the most widely used white pigment.

Titanium dioxide pigments particle size and particle size distribution have very strict requirements. Crushing the titanium dioxide industry methods wet grinding and dry pulverization categories. Wet grinding mill and sand mill equipment, were carried out in aqueous medium; dry grinding equipment Raymond Mill, centrifugal mill, jet mill and the like. Smash also not a single grinding equipment, but the use of two grinding equipment or a combination of two or more, such as the firing was the first by ring-roll mill and then pulverized by the air flow, but also useful for multiple grinding with a device, such as di secondary air smash. Some commonly used crushing equipment below.

1. Ball Mill
Ball Mill contains two types: wet and dry. Titanium dioxide industry in the early stages of development, there is a very long time by a wet Ball Mill as the main grinding equipment, a dry ball mill crushing effect due to the poor, usually only on the primary crushing the calcined material. Wet Ball Mill is generally used in conjunction with water selected. To improve the grinding efficiency, usually need to add a dispersing agent.

2. Raymond Mill
Raymond machine, also known ring roller mill, titanium dioxide industry are using the pendulum ring roller mill wheel. Raymond machine used to crush the non-pigment titanium dioxide products, also available on the primary crushing pigments titanium dioxide. Because of its interior with separators, compared with other dry mechanical mill (eg centrifugal mill), less the product of coarse particles. Further material wear less pollution, production, electricity province, so commonly used foreign anatase and rutile titanium dioxide primary crushing and anatase titanium dioxide secondary crushing. Liming Heavy Industry's Raymond mill，for low consumption, low investment, environment friendly , small occupation area, and more efficient than the traditional mill, it is widely used in the field of metallurgy, building materials, chemical industry and mining to process powder. The series is used in grinding the non-flammable and non-explosive stuff which has the Moh’s hardness below 7, humidity less than 6%, such as gypsum, talc, calcite, limestone, marble, feldspar, barite, dolomite, granite, kaolin, bentonite, bauxite, iron ore etc., the final products change from 613 micron to 44 micron. Through the function of separator and blower, it can meet different customers’ demand.

3. High-speed centrifugal mill
High-speed centrifugal mill, also known as universal mill. Raymond mill and centrifugal machines, are primarily used in the primary crushing or grinding the non-pigment titanium white pigment titanium dioxide.

4. Sand mill
Wet sanding machine is a stirring and crushing equipment can be used titanium dioxide pigment primary or secondary crushing, pulverizing mill is a special mortar titanium dioxide on their own separation.

5. The pneumatic pulverizer
When you need the material crushed to submicron fineness and narrow particle size distribution and requirements, Jet Mill is one of the most important and most effective means. Ideal size requirements of titanium dioxide pigments around 0.2um, very narrow particle size distribution width requirements, general mechanical pulverization can not do this, only through the jet mill in order to meet this requirement. Particle size distribution of the pulverized product stream little change over time, product quality is stable, the other advantage is that the material can be mechanically pulverizing fashion, chemical treatment, which titanium dioxide industry is extremely valuable.