改进锐钛型钛白粉应用性能的方法

1、提高和稳定钛白粉白度的主要途径

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