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Titanium pigment application performance improvement methods are there?

2015.08.12   14:27

About titanium dioxide is most main is to see the white degree of titanium pigment,but again a lot of factors influencing the white degree of the titanium dioxide,for example,the source,Equipment influence and so on,but the most important technology.Method to detect white white degree and is through the test and have certain ability of technology Member of on-site judgment.Titanium dioxide basically see the hydrolysis of titanium dioxide quality,the quality of the impurities removal degree whether qualified,and calcination conditions Whether or not qualified.

And judging methods of titanium dioxide has the following several kinds of methods

1.The hydrolysis technology of titanium powder in titanium dioxide hydrolysis,using atmospheric water quality is better,but to ensure the quality of hydrolysis,hydrolyze granule to uniform.

2.Determine whether acrobatics nonferrous elements of qualified,for example,the content of iron,nickel and other metal elements.In case of the similar metal acrobatics must take Measures for processing.For titanium white white degree of influence is mainly the content of other metals.

3.The stability of titanium dioxide particle size distribution,and improve the titanium pigment dispersion and covering power of the method has the following method, the hydrolysis of titanium dioxide particle size as the previous said Size,in this case,can be avoid by adjusting the hydrolysis process conditions.

4.You can also through the process on the surface of titanium dioxide to improve titanium pigment application performance,titanium dioxide nature hydrophilic abhorred oil,so must carry on the surface treatment to mention High dispersibility,such ability improving titanium pigment application methods.

The main ways to improve and stable titanium white white degree

Titanium dioxide are many factors that affect the whiteness,the influence of the source,has equipment and key technology of influence.Through test and field experience,affect it Whiteness of the main factors are:quality of hydrolysis,the removal of the impurity elements and calcination conditions.

Titanium dioxide hydrolysis technology at present,our country has a pressurized hydrolysis and atmospheric hydrolysis two technologies,ahflk_2 according to the analysis of water quality and product quality Hydrolysis atmospheric hydrolysis quality is better,uniform particle size.To ensure the quality of hydrolysis,titanium must strictly the thick liquid quality indicators,control iron titanium ratio and solid content in the rules Range,at the same time increase the control of hydrolysis process operating conditions.

Another major influence factors of titanium white whiteness are some colored impurity elements,such as iron, cobalt,nickel,etc.,some measures must be taken into Line clearance,to sharp titanium type titanium pigment,high iron content in 120 PPM,affecting the white degree,even light color tautomerism.

Stability of titanium dioxide particle size distribution,and improve the titanium pigment dispersion and the way of hiding power

Titanium pigment particle size distribution is a comprehensive indicator,it seriously affect the titanium dioxide pigment and product application performance,therefore,for the covering power and The discussion of the dispersion can be directly on the particle size distribution were analyzed.

Factors affecting titanium pigment particle size distribution is relatively complex,the first is hydrolysis the size of the original size,through the control and regulation of hydrolysis process conditions,make the original The particle size within a certain range.Followed by calcination temperature,metatitanic acid in the process of calcination,particle through a crystal type conversion period and growth period,control Appropriate temperature,the growing particles within a certain range.Finally is the product of crushing,usually on Raymond mill and analyzer speed regulation,control Grinding quality,can use other crushing equipment at the same time.

Through the surface treatment,improve the application performance of titanium dioxide

High quality titanium dioxide is polarity big powder,the nature is hydrophilic abhorred oil,but if the surface,there are air,water and other pollutants in the water The dispersion is reduced,surface treatment,often need to commonly used treatment for alumina and hydrate of hydrated silica.Also has a lot of surface on the market at present Treating agent.

By Nicole

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