Methods to Improve the Application Performance of Rutile Titanium Dioxide
Release time:
2022-05-11
1. The main ways to improve and stabilize the whiteness of rutile titanium dioxide.
Rutile titanium dioxide.The whiteness is affected by various factors, including mineral sources, equipment, and key technologies. Through experiments and field experience, the main factors affecting its whiteness are: hydrolysis quality, removal of impurity elements, and calcination conditions.
Rutile titanium dioxide hydrolysis technology. Currently, there are two types of hydrolysis technology in China: pressurized hydrolysis and atmospheric hydrolysis. Analyzing from the perspective of hydrolysis quality and product quality, atmospheric hydrolysis has better quality and uniform hydrolysis particle size. To ensure hydrolysis quality, it is necessary to strictly control the quality indicators of concentrated titanium liquid, keeping the iron-titanium ratio and solid content within the specified range, and to strengthen the control over the operating conditions of the hydrolysis process.
Another major factor affecting the whiteness of rutile titanium dioxide is some colored impurity elements, such as iron, cobalt, nickel, etc. Measures must be taken to eliminate them. For rutile titanium dioxide, when the high iron content is 120ppm, the whiteness will be affected, and even light and color will change with each other. Bleaching technology is used to improve the washing strength of high iron, and some masking agents, such as antimony trioxide and phosphoric acid, are added to complexly mask iron to reduce the impact of impurity elements on the whiteness of titanium dioxide. Controlling calcination conditions is an important link in verifying the titanium dioxide crystal nucleus. A good calcination temperature can completely desulfurize and dehydrate titanium dioxide, minimizing the impact of lattice defects in the titanium dioxide crystal nucleus on its whiteness. Therefore, it is necessary to strengthen the control over key temperature points, while the feed amount should be reasonably matched with the kiln body rotation speed, and the combustion chamber should be enlarged to avoid the material contacting the flame and sintering.
2. Improving the application performance of rutile titanium dioxide through surface treatment.
Rutile titanium dioxide is a powder with very strong polarity, inherently hydrophilic and oleophobic. However, if the surface is contaminated with air, water, and other pollutants, its dispersibility in water will decrease, often requiring surface treatment. Common treatment agents are hydrated alumina and hydrated silica. Currently, there are many surface treatment agents on the market, such as organosilicon, coupling agents, etc., or adding some other inorganic pigments, such as barium sulfate and aluminum hydroxide, to improve the surface characteristics of rutile titanium dioxide and enhance its dispersibility.
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Key words: tengxian titanium dioxide, titanium dioxide, rutile, titanium dioxide manufacturers, anatase titanium dioxide, titanium dioxide manufacturers, anatase titanium dioxide, rutile titanium white
Contact Information
Address: Teng County, Guangxi Chemical Industry Zone