1, the main way to improve and stabilize the titanium dioxide whiteness

钛白粉的白度影响因素很多，有矿源的影响，也有设备和关键技术的影响。通过试验和现场经验，影响其白度的主要因素有：水解质量，杂质元素的清除和煅烧条件。

The whiteness of titanium dioxide is influenced by many factors, such as the influence of ore source, and the influence of equipment and key technology. Through test and field experience, the main factors affecting the whiteness are hydrolysis quality, removal of impurity elements and calcination conditions.

钛白粉的水解技术，目前国内有加压水解和常压水解两种技术，从水解质量和产品质量来分析，常压水解质量较好，水解粒径均匀。要保证水解质量，必须严把浓钛液质量指标，控制铁钛比和固含量在规定范围内，同时加大水解工艺操作条件的控制。

The hydrolysis technology of titanium dioxide has two kinds of technology, hydrolysis hydrolysis and atmospheric hydrolysis at present. The hydrolysis quality and product quality are analyzed. The hydrolysis quality is good and the hydrolysis particle size is uniform. To ensure the quality of hydrolysis, must strictly the quality index of thick titanium liquid, control of Fe / Ti ratio and solid content within the specified scope, control and increase the hydrolysis process conditions.

影响钛白粉白度的另外一个主要因素是一些杂质有色元素，例如：铁、钴、镍等，必须采取一定的措施进行清除，对于锐钛型钛白粉，高铁含量在120ppm时，影响其白度，甚至发生光色互变现象。采用漂白技术，加大高铁的洗涤力度，同时加一些掩蔽剂，例如：三氧化二锑和磷酸，来对铁进行络合掩蔽，降低杂质元素对钛白粉白度的影响力。

Another major factor affecting titanium dioxide whiteness is some impurity elements such as iron, nonferrous metals, cobalt, nickel and so on, certain measures must be taken to remove the anatase titanium dioxide, high iron content in 120ppm, affecting its whiteness, even phototropy. The use of bleaching technology, increase the washing power of high-speed iron, and add some masking agents, such as: three oxidation of two antimony and phosphoric acid, to iron complexation masking, reduce the influence of impurities on the whiteness of titanium dioxide.

煅烧条件的控制，是钛白粉晶核定型的一个重要环节，良好的煅烧温度，可以使钛白粉脱硫、脱水完全，尽量避免钛白粉晶核的晶格缺陷，而影响其白度。因此，加大对关键温度点的控制，同时使进料量和窑体转速合理匹配，增加燃烧室，避免物料和火焰接触，发生烧结。

Control of calcination conditions, is an important part of nuclear titanium dioxide powder, calcining temperature is good, can make the titanium dioxide desulfurization, dehydration, avoid defects of titanium dioxide crystal nucleus, and influence its whiteness. Therefore, the control of the critical temperature point is increased, and the feed volume and the kiln body speed are reasonably matched to increase the combustion chamber, avoid the contact between material and flame, and produce sintering.

2、稳定钛白粉粒度分布，提高钛白粉分散性和遮盖力的途径

2. To stabilize the particle size distribution of titanium dioxide powder and improve the dispersion and hiding power of titanium dioxide

钛白粉粒度分布是一个综合性的指标，它严重影响钛白粉颜料性能和产品应用性能，因此，对于遮盖力和分散性的讨论可直接从粒度分布上进行分析。

The size distribution of titanium dioxide powder is a comprehensive index, which seriously affects the performance and application performance of titanium dioxide pigment. Therefore, the discussion of the covering power and dispersion can be directly analyzed from the particle size distribution.

影响钛白粉粒度分布的因素较为复杂，首先是水解原始粒径的大小，通过控制和调节水解工艺条件，使原始粒径在一定范围内。其次是煅烧温度，偏钛酸在煅烧的过程中，粒子经历一个晶型转化期和成长期，控制适宜的温度，使成长粒子在一定范围内。最后就是产品的粉碎，通常对雷蒙磨的改造和分析器转速的调节，控制粉碎质量，同时可以采用其它粉碎设备，例如：万能磨、气流粉碎机和锤磨装置。

The factors affecting the size distribution of titanium dioxide powder are complex. The first is the size of the original particle size of hydrolysis, and the original particle size is within a certain range by controlling and adjusting the hydrolysis process conditions. Secondly, the calcination temperature, in the process of calcination, the particles undergo a crystalline transformation and growth period, control the appropriate temperature, so that the growing particles within a certain range. The last is the product of the transformation of crushing, regulation usually Raymond mill and the parser speed, control of grinding quality, also can use other crushing equipment, such as: universal grinding, jet mill and hammer grinding device.

3、通过表面处理，提高钛白粉的应用性能

3, improve the application performance of titanium dioxide by surface treatment

钛白粉是极性很大的粉体，本性是亲水憎油的，但如果表面吸附有空气、水和其他污染物，则在水中的分散性降低，常常需要对其作表面处理，常用处理剂为水合氧化铝和水合氧化硅。目前市场上也有很多表面处理剂，例如：有机硅、偶联剂等进行处理，或者加一些其它无机颜料例如：硫酸钡、氢氧化铝等来改善钛白粉表面特性，提高其分散性。

Titanium dioxide is the great polar powder, nature is hydrophilic and oil repellent, but if you are absorbed on the surface of air, water and other pollutants in the water dispersion decreases, often need to surface treatment of the commonly used treatment agent for hydrous alumina and silicon oxide hydrate. Currently on the market there are a lot of surface treatment agent, such as silicone coupling agent, processing, or add some other inorganic pigments such as barium sulfate, aluminum hydroxide to improve surface properties of titanium dioxide, improve its dispersion.