First, strictly control the particle size and particle size distribution.
The factors affecting the particle size and particle size distribution of titanium dioxide are relatively complex, and it is difficult to fully grasp it. Therefore, the hydrolysis process and technology can be improved first to ensure that the primary particles generated are uniform. Secondly, the control of the key temperature point of calcination can be strengthened, so that the titanium dioxide particles can grow uniformly. Finally, for the pulverization of the product, a jet mill with high efficiency and good grading effect can be selected instead of the Raymond system to stabilize the surface characteristics of titanium dioxide.
Second, strictly control oil absorption and water-soluble substances.
The oil absorption of titanium dioxide is mainly related to the calcination atmosphere or the temperature of the calcination high temperature point during the calcination process. If it is not properly controlled, it will cause lattice defects and irregular particle shapes of titanium dioxide particles. Therefore, it is necessary to control the appropriate calcination temperature and adjust the feed amount. Reasonable matching with the kiln body speed reduces the lattice defects of the particles and the regular geometric shape of the particles.
Third, strictly do a good job in surface treatment.
At present, most domestic manufacturers produce anatase titanium dioxide, which has poor dispersion in coatings. Under the background of the country's promotion of clean industry, its application in the coating industry is gradually replaced by rutile titanium dioxide. For coating companies that are still using anatase titanium dioxide, their surface properties can be changed through surface treatment, such as selecting silicone, coupling nitrogen reagents or some polyphosphates.
Dispersion is an important indicator that titanium dioxide manufacturers are most concerned about. If the dispersion is not good, not only the efficacy of titanium dioxide will be greatly reduced, but the pollution will also increase. With the rapid development of my country's economy and policies, especially the improvement of environmental protection policies, the industries related to titanium dioxide, especially the coating manufacturing industry, are developing rapidly, which brings new opportunities and challenges to my country's titanium dioxide manufacturing industry.
