Major technological breakthrough in titanium dioxi

2022-08-16
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Major technological breakthroughs have been made in the production of titanium dioxide by chlorination

the first national seminar on the production technology of titanium dioxide by boiling chlorination and the technical review meeting of titanium dioxide by chlorination engineering of Luohe Xingmao titanium industry was held in Luohe City, Henan Province last week. Many titanium dioxide experts discussed and reviewed the production technology of titanium dioxide by boiling chlorination in Luohe XingMao Titanium Industry Co., Ltd. and smart factory. The expert group believes that the company has completely mastered the production process and technology system of titanium dioxide by chlorination, has independent intellectual property rights, and the product quality has reached the advanced level of similar products at home and abroad, and is basically stable. The project has reached the domestic leading and international advanced level

according to Li maoen, chairman of Xingmao titanium industry company, the total construction scale of the chlorination titanium dioxide production project is 200000 tons/year, the first phase construction scale is 60000 tons/year, and the actual investment is 750million yuan. The products have been tested by the National Paint Quality Supervision and testing center. The whiteness, hue, achromatic power, hiding power, film performance, film gloss, dispersion and other indicators have reached the international advanced quality standards of similar products since its establishment in 1929. At present, the project has entered the normal production stage, and the operation of the production system and product quality are stable

it is understood that the original particle size of titanium dioxide is one of the key factors determining its performance. Previously, there was no domestic titanium dioxide product with particle size and particle size distribution comparable to similar international products. According to the detection and analysis of titanium dioxide products by authoritative testing institutions, Luohe Xingmao titanium industry can produce products with excellent original particle size in China's titanium dioxide industry at present, which has the potential that the product quality can fully reach or even exceed the imported titanium dioxide by chlorination method. The composition of impurity elements in the product is entrusted to the international authoritative Swiss general impartial service (SGS) for all testing, which meets the requirements of relevant professional limit values of the European Union, and heavy metal elements are not detected

Li maoen told that the first phase of the project entered the full-scale construction stage in March 2012, the construction of the first production line was completed in August 2013, and the trial production began in September 2013. By September 2014, the trial production of the project has realized the continuous full load operation of the whole process for 99 hours. The completion of the project and the continuous and stable operation of production show that Luohe Xingmao titanium has completely mastered the construction and production technology of titanium chloride white project; The successful long-term operation of the project not only breaks through the domestic technical bottleneck, but also cultivates a group of excellent technical talents. The company also has the basic conditions for further expansion and strength. Xingmao titanium industry will focus on the world's scientific and technological frontier, establish a strong technology research and development team, and build a world-class chlorinated titanium dioxide project

the national titanium dioxide expert group said that the project was completed by the enterprise on its own, which realized the successful continuous operation from project construction to trial production, and transferred to normal and stable production. It has the characteristics of reasonable process, advanced technology, stable operation, safety and reliability. The successful trial production of the project marks a major breakthrough in the production technology of titanium dioxide by chlorination, which represents the upgrading of China's titanium dioxide industry technology and the direction of industrial structure adjustment, and is conducive to breaking the blockade and monopoly of foreign technology

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titanium dioxide is the third largest inorganic chemical product in the world after synthetic ammonia and phosphoric acid, and is widely used in coatings, plastics, papermaking, chemical fiber, ink and other fields. Asia is the main demand area for titanium dioxide in the world, and the titanium dioxide industry shows a rapid development momentum. In 2013, the actual output of titanium dioxide in China exceeded 2million tons for the first time, reaching 2.155 million tons, an increase of 14%, accounting for about one third of the global total. It has surpassed the United States for several consecutive years and is the world's largest producer and consumer of titanium dioxide. Industry experts predict that the annual demand for titanium dioxide in China will maintain an increase of 10% - 15%. With the acceleration of domestic urbanization, the growth trend will be stronger

in terms of production process, there are two main processes and technologies for titanium dioxide production in the world: sulfuric acid process and chlorination process. Among them, the production technology of titanium dioxide by chlorination has developed rapidly because of its significant advantages such as short process flow, large production capacity, high product quality and low pollution emissions. It has been a very mature advanced process in the world. Since the 1980s, new titanium dioxide production lines in foreign countries have adopted this process as the mainstream production line. At present, about 60% of the global output of titanium dioxide is produced by chlorination process

for a long time, foreign chemical giants have highly blocked and monopolized the production technology of titanium dioxide by chlorination method. The existing domestic design capacity of titanium dioxide by sulfuric acid method has reached more than 2.8 million tons per year, of which about 2million tons have been built in recent ten years, and are distributed among dozens of manufacturers. The enterprises are mainly small and medium-sized enterprises, the industrial concentration is obviously too low, the products are mainly medium and low-end, and the homogenization competition is fierce. The demand for high-end products still depends on imports, with an annual import volume of about 200000 tons

experts believe that technology is the key to the promotion of chlorination.

due to the advantages of short process flow, large production capacity of the device, high degree of automation, good product quality, less waste and side emissions and cleaner production, chlorination has become the main trend of the process development of titanium dioxide in the world. Except for China, none of the new titanium dioxide plants in the world since the 1980s have adopted the sulfuric acid process, and the original sulfuric acid process plants have been gradually eliminated due to environmental and economic reasons. The United States, the former largest producer of titanium dioxide in the world, has closed all sulfuric acid plants in the 1990s. DuPont, the largest producer of titanium dioxide in the world, has a capacity of nearly 1.2 million tons per year, all of which are chlorination processes. The capacity of the largest plant has reached 450000 tons per year

in China, the situation is quite different. The total production capacity of titanium dioxide in China was less than 200000 tons/year in 1998. After more than ten years of rapid development, the total production capacity has exceeded that of the United States by 2012, making it the world's first to heat the vehicle when the car starts in the new winter, so as to better protect the diesel engine. In 2013, the total production capacity of titanium dioxide in China has reached more than 2.8 million tons/year, of which Jinzhou titanium industry is the only enterprise with normal production of chlorination process, and its production capacity and actual output account for less than 1.1% of the national total in that year

the production process of titanium dioxide by chlorination represents the direction of upgrading the domestic titanium dioxide industry. Although China has listed chlorination as an encouraged category in the catalogue for the guidance of industrial restructuring since 2005, the situation has been so bleak in the past 10 years, reflecting that the development of chlorination titanium dioxide industry is very difficult. Due to foreign monopoly, the lack of core technology is the primary problem in the development of titanium dioxide project by chlorination in China

the chlorination process of titanium raw materials in chlorination method includes molten salt process and boiling process. At present, among the global chlorination titanium dioxide plants, only Jinzhou titanium industry adopts the technology of molten salt chlorination and subsequent oxidation to produce titanium dioxide. Although molten salt chlorination has some advantages, it has more disadvantages that are difficult to overcome. Boiling chlorination has become the mainstream process in the production of titanium dioxide by chlorination in the world

at present, the boiling chlorination titanium dioxide plants in pilot production in China include the 30000 T/a project of Jinzhou titanium industry, the 60000 T/a project of Yunnan Xinli and the 60000 T/a project of Luohe Xingmao, and the 60000 T/a project of Henan baililian is followed up in the later stage. Among them, Luohe Xingmao titanium industry has developed rapidly and has entered the stage of large-scale normal production. This will play a positive role in promoting the development of domestic titanium dioxide industry by chlorination

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