Titanium dioxide is processed by a flat airflow ultrafine grinder to improve dispersibility

After calcination or surface treatment, all titanium dioxide powders are aggregates or sintered products of different sizes. They must be grinded to the original basic raw material size (approximately 0.15~0.35μm) in order to fully reflect its optical properties and pigment performance. Titanium dioxide is a superior white pigment. It has very high requirements on particle size, particle size distribution and purity. It is difficult for general mechanical grinding equipment to meet the requirements. Therefore, airflow ultrafine pulverizers are used as the final pulverization of titanium dioxide at home and abroad. equipment.

As an important equipment for ultrafine pulverization, the airflow superfine pulverizer plays an irreplaceable important role in the production of titanium dioxide. At present, titanium dioxide manufacturers mostly use flat airflow ultrafine pulverizers, and their working principles and application characteristics are as follows.

The working principle of the flat airflow ultrafine pulverizer: the material to be pulverized is injected into the pulverizing chamber through the nozzle, and the high-pressure airflow enters the air distribution chamber through the inlet. The distribution chamber is connected with the pulverizing chamber. At a speed of several hundred meters to thousands of meters per second, because the grinding nozzle and the grinding chamber form an acute angle (grinding angle), the grinded material rotates under the drive of the high-speed swirling flow. Between the particles, the particles and the body produce mutual impact, collision and friction and grind. The fine powder is guided by the centripetal airflow into the center outlet pipe of the grinder and enters the collector for collection, and the materials that do not meet the requirements are returned to the grinding chamber to continue grinding until it reaches the required fineness and is collected.

The flat airflow ultra-fine pulverizer used for the pulverization of titanium dioxide has the following advantages:

1.  Due to the self-grading function, the product particle size distribution can be controlled in a very narrow range by adjusting the parameters;

2.  No mechanical rotating parts, less pollution to the product;

3.  Superheated steam can be used as the pulverizing working medium, with low viscosity and no static electricity, which can reduce the secondary cohesion of the powdered material;

4.  Grindingunder high temperature conditions can improve the application dispersibility of titanium dioxide and increase the fluidity of titanium dioxide;

5.  The flat airflow ultrafine pulverizer can add organic additives while pulverizing to modify the surface, which can increase the dispersibility of titanium dioxide in different application systems.