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On July 6th, the 2024 Second Titanium Dioxide Industry Technological Innovation Achievement Exchange and Exhibition Conference, hosted by the Titanium Dioxide Industry Technology Innovation Strategic Alliance and the International Powder Inspection and Control Federation, was held in Guangzhou, the city of RAMS. Nearly 200 experts, scholars, entrepreneurs, and engineering technicians from the national titanium dioxide industry and related supporting fields gathered together, focusing on technological innovation of enterprises. Discuss the new quality and productivity improvement of the industry together.

Bi Sheng, the secretary-general of the Titanium Dioxide Alliance, pointed out that over the past 13 years since its approval, the alliance has been committed to the working principle of technological innovation. It has repeatedly promoted the production technologies, equipment technologies, environmental protection technologies, energy conservation and consumption reduction technologies, as well as comprehensive utilization technologies that have been widely popularized in the industry. Through various practical innovation activities, it has gained wide recognition from the industry and all parties.

This year's innovation achievements exchange and exhibition is aimed at taking the technological innovation demands of titanium dioxide enterprises as the guide, promoting the newly launched technological innovation achievements of titanium dioxide and related supporting enterprises to the industry, and enhancing the innovation capacity, development capacity and market competitiveness of the entire industry. Meanwhile, the precise service level of the alliance will be further enhanced, promoting the transfer of innovative technological achievements of titanium dioxide enterprises and related supporting enterprises to the industry, and fully and efficiently advancing the industrial application of advanced technologies in titanium dioxide enterprises.

Peng Anzheng, the chairman of the Titanium Dioxide Alliance, delivered a speech at the meeting, pointing out that in 2023, the titanium dioxide industry overcame the difficulties of the global economic recession and the slow recovery of the domestic economy. It remained steadfast in leading with science and technology and promoting the improvement of product brand quality, remained steadfast in innovation-driven development and promoting the integration of informatization and industrialization, and remained steadfast in energy conservation and emission reduction and accelerating the pace of industrial upgrading and transformation. We have made arduous efforts for the high-quality development of China's titanium dioxide industry.

Peng Anzheng emphasized that in the first half of this year, despite the uncertainties brought about by the uneven global economic recovery and geopolitical tensions, China's economic growth rate remained basically stable. The performance of exports and outbound investment was still relatively strong. Consumer confidence gradually recovered and the growth of consumer spending was also relatively stable. Overall, it demonstrated a certain degree of resilience and stability. For the titanium dioxide industry, with the initial ruling of the EU's anti-dumping investigation on Chinese titanium dioxide being made, the export market and capacity balance of titanium dioxide will be greatly affected, and the survival and development of China's titanium dioxide industry will face severe challenges. Peng Anzheng believes that at present, only innovation can win survival space and only innovation can achieve high-quality development of the industry.

Peng Anzheng hopes that through the exchange of innovative achievements, new technologies for energy conservation, emission reduction and resource utilization, as well as new achievements in clean production and circular economy can be brought to titanium dioxide producers across the country. It also provides a new platform for win-win cooperation for advanced equipment enterprises and technical service enterprises that are committed to promoting the progress of the titanium dioxide industry. Through the joint efforts of the upstream and downstream of the industrial chain and other fields, Promote the continuous development of new quality productivity in China's titanium dioxide industry.

Qiu Jianting, the director of the expert Committee of the Titanium Dioxide Alliance, pointed out that the "Titanium Dioxide Alliance" emerged in the context of the country's vigorous promotion of a new mechanism for technological innovation in the form of industrial technology innovation strategic alliances. Since its establishment, in accordance with the charter and mission of the "Alliance", an authoritative and representative expert committee has been set up. It closely follows the development trends of the international and domestic titanium dioxide industry, centers on the themes of technological innovation and progress, and focuses on innovation priorities such as environmental protection, energy conservation and consumption, circular economy, and technical training. With the "Alliance" as a platform, it actively conducts technical project cooperation Give full play to the knowledge, ability and experience of experts, and strive to carry out the promotion of new technologies, consulting services, technical training, foreign cooperation and other work, and strive to promote the high-quality, rapid and healthy development of the titanium dioxide industry.

The alliance also takes innovation and service as its fundamental tenets, and has established a "Professional Training Platform for Technology and Innovation" and a "New Platform for the Exchange of Technological Innovation Achievements". It conducts innovation and service work mainly in the form of training in areas such as professional technical teaching of titanium dioxide, promotion of new technology application, industrial upgrading and clean production leadership, and management technology application. Build the "Training Platform" into a distinctive service brand that is welcomed and recognized by member enterprises of the titanium dioxide Alliance. Through a new platform for the exchange of technological innovation achievements, it serves as a bridge for the application and cooperation of advanced technologies and equipment in the titanium dioxide industry. Successively recommended new clean production technologies such as acid hydrolysis tail gas treatment, high-efficiency plasma treatment of rotary kiln tail gas for environmental protection, high-efficiency concentration of waste acid, membrane filtration and concentration of fresh wastewater, application of multi-type plate and frame filter press in titanium dioxide, automatic packaging of titanium dioxide, magnetic separation recovery of titanium concentrate from acid hydrolysis black slag, utilization of waste heat from rotary kiln tail gas, MVR titanium liquid concentration, gradient vacuum crystallization, multi-effect concentration of titanium liquid, and rotary kiln tail gas The implementation of energy-saving and consumption-reducing technologies such as waste heat utilization has improved the quality and efficiency of enterprises, providing an important support for the continuous innovation of the titanium dioxide industry.

Qiu Jianting stated that innovation is the main driving force for the healthy and rapid development of the titanium dioxide industry. Under the current circumstances, accelerating innovation-driven development and industrial upgrading are key measures for the titanium dioxide industry and its "alliance". The "Alliance" will wholeheartedly provide precise services for the titanium dioxide industry and contribute to the new quality and productivity improvement of the titanium dioxide industry.

The conference focused on the high-quality development of the industry and the improvement of new productivity. Extensive exchanges were made on the innovative technological achievements of comprehensive and efficient slag reduction, emission reduction and resource utilization in the production of titanium dioxide by the sulfuric acid method, the technology of freezing crystallization for impurity removal of waste acid and the preparation of battery-grade iron phosphate with high iron concentration, the application of low-temperature plasma technology in the tail gas treatment field of the titanium dioxide industry, the application of double-jet ceramic jet mills in titanium dioxide production, and the "new technology" of direct cooling vacuum crystallization. New approaches and technologies for achieving a "new low" in the separation of ferrous ions and residual titanium, as well as for the full recovery and recycling of waste acid from titanium dioxide production.

Xiao Lijing, the chief engineer of the R&D center of Nantong Sansheng Graphite Co., LTD., pointed out in her report titled "Reducing Titanium Dioxide Waste Emissions and Establishing a Carbon Factor Footprint Management System" that the company has been dedicated to the concentration, recovery and resource recycling of titanium dioxide waste acid for 24 years, and has established over 80 sets of facilities for titanium dioxide enterprises in China. In the past two years, in collaboration with Panzhihua Haifengxin Chemical Co., LTD., we have jointly developed an energy-saving continuous freezing crystallization technology for titanium dioxide waste acid. Coupled with a specially designed tail gas Ventur-tower pre-concentrated acid technology and the fourth-generation high-efficiency waste acid evaporation concentration technology, the three technologies have been highly integrated to successfully develop a complete comprehensive slag reduction process package for titanium dioxide production, which has been industrialized at Haifengxin. This technical process first freezes the waste acid from titanium dioxide to precipitate ferrous sulfate heptahydrate crystals. Then, it uses the residual heat of the tail gas from the rotary kiln calcination of titanium dioxide to pre-concentrate the crystallization mother liquor to an acid concentration of approximately 36%. Finally, through a high-efficiency evaporation concentration device, the acid concentration is increased to a finished acid with a target acid concentration of approximately 70%. Among them, ferrous sulfate heptahydrate can be resold, and the finished acid can be directly returned to the ilmenite acid hydrolysis process for recycling.

Xiao Lijing introduced that the technical and economic indicators obtained by this technology, calculated in units of tons of titanium dioxide, can yield 1.2 tons of ferrous sulfate heptahydrate /t TiO2, 1.2 tons of sulfuric acid /t TiO2, reduce 6.6 tons of titanium gypsum residue /t TiO2, and generate a direct economic benefit of 602 yuan /t TiO2. CO2 reduction: 0.6417t/t TiO2. According to the annual production capacity of 100,000 tons of titanium dioxide of Haifengxin, the annual reduction of CO2 emissions is 64,170 tons, ultimately achieving dual benefits of economy and environmental protection, which is in line with the overall industrial strategic goal of the country to promote energy conservation and carbon reduction and develop new quality productive forces.

Jin Junzhe, the chairman of Nantong Ganhan Environmental Engineering Co., LTD., introduced that the "Low-temperature Plasma Deep Treatment Technology for Titanium Dioxide Production Tail Gas" developed by the company has passed the review of authoritative industry experts. It has been recognized as an innovative technological achievement in the production of titanium dioxide by the sulfuric acid process and is at the leading level in China. The essence of this technology for "deodorization, de-whitening and dust removal" of flue gas is to utilize the technical principle of low-temperature plasma based on corona discharge. Through simultaneous processes such as charging for dust suppression, ionization and oxidation, it adsorbs and decomposes pollutants such as particulate matter, acid mist and odors in the exhaust gas, generating stable substances and water that do not produce odors. The wastewater is collected by the system and then sent to the factory's sewage treatment system for centralized treatment and discharge. The exhaust gas is discharged through the chimney without any odor or smoke, meeting the standards.

At present, this technology has been implemented and put into operation in the deep purification of tail gas in factories such as Qianjiang Fangyuan Titanium Dioxide Co., LTD., Ningbo Xinfu Titanium Dioxide Co., LTD., and the Jiaozuo base of Longi Group Co., LTD. Third-party testing data show that the import volume of sulfur dioxide is 97.3mg/m³, the export volume is less than 3mg/m³, and the particulate matter The output of indicators such as acid mist is all less than 5mg/h, especially hydrogen sulfide, which is almost 100% removed. The removal rate of odor concentration reaches over 85% to 90%. The phenomenon of acid hydrolysis tail gas disturbing the residents has been completely solved. All the indicators after being treated by the complete purification process are superior to the national standard discharge indicators. From the perspective of operation effect, it can achieve "long-term stable and compliant operation". With the continuous implementation of subsequent projects, this technology will lay a more solid foundation for the high-quality and green development of the industry.

Ding Hongwei, the chief project R&D director and chief engineer of Jiangsu Yixing Non-metallic Chemical Machinery Co., LTD., shared at the meeting the double-jet ceramic jet mill developed by the company, which has complete independent intellectual property rights. This is a specialized equipment specifically designed for the post-treatment of rutile titanium dioxide, with the main crushing target being the dispersion of polymers. Compared with the traditional multi-nozzle flat jet mill, it has the advantages of high quality and high output, high efficiency and low consumption, stable operation and long service life, meeting the requirements of modern ultrafine powder production.

Ding Hongwei introduced that in the post-treatment process of titanium dioxide production, there is a key position of air jet grinding and coating, which must use high-temperature resistant and wear-resistant air jet grinding machines. More than ten years ago, large-scale high-temperature resistant and wear-resistant double-jet ceramic air jet grinding machines were widely used abroad, eliminating the multi-nozzle flat air jet grinding machines that were unstable in operation and quality in this position. The large-scale high-temperature resistant double-jet ceramic jet mill also represents the latest development trend of jet mills in the international market. Due to its high manufacturing difficulty, up to now, the domestic titanium dioxide industry still mainly uses multi-nozzle flat jet mills. This is a reluctant choice and has also become one of the pain points in equipment selection in the titanium dioxide industry.

As the earliest domestic manufacturer of multi-nozzle flat ceramic jet mills; Yixing Non-metallic Chemical Machinery Company has invested a huge amount of money. Based on the absorption of advanced foreign technologies, it has combined the technology and experience of over 60 years of manufacturing engineering ceramics and over 40 years of manufacturing ceramic jet mills, organically integrating the two technologies. After more than 10 years of unremitting efforts, bold innovation, and dedicated research and application, Finally, the second-generation GTMS series of double-jet ceramic jet mills were developed and formed.

At present, this machine has been successfully operated in Shandong Dongjia Group, Jinan Yuxing Chemical Co., LTD., Guangxi Lanxing Dahua Co., Ltd. and Zhengtai New Materials Technology Co., LTD. The products it produces are of high quality and stable, and have been widely recognized by users. It will also provide important support for the improvement of new quality and productivity in the industry.

The steam direct freezing vacuum crystallization technology, jointly developed by Zhu Shuangchun, a senior expert in the titanium dioxide industry, Zhang Yidu, the former general manager of Fumin Longteng Titanium Industry, and Zhejiang Xinlongda Vacuum Equipment Co., LTD., starts from the theory of industrial crystallization and combines the characteristics of ferrous sulfate crystallization. It has revolutionized the vacuum crystallization methods such as pumping and stirring in the introduced technology. The original steam jet and propeller mechanical stirring were replaced. The secondary steam evaporated was directly cooled and liquefied by using chilled water to achieve the effect of adiabatic evaporation cooling. Zhang Yidu shared at the meeting.

This technology was successfully implemented at Fumin Longteng Titanium Industry last September and has been operating stably since then. This technology performs extremely well. Firstly, the steam consumption of each ton of titanium dioxide product is reduced by more than one ton compared with the introduced technology. Second, the requirements for circulating water are relatively low. Whether it is hard water or soft water, the water quality meets the usage requirements and will not produce scale, which would deteriorate the usability. Especially for factories in high-temperature areas during summer, it can prevent the impact of the increase in circulating water temperature caused by the humid and hot environment in summer on production and quality. Thirdly, the three-dimensional structure of the obtained ferrous sulfate heptahydrate crystal particles is excellent, making a significant contribution to the washing effect of the titanium solution. The average residual titanium content of ferrous sulfate is less than 0.18%. Fourth, as the pusher mechanical stirring is no longer adopted, the phenomenon of ferrous plate formation on the mold wall has been basically eliminated. The cleaning cycle exceeds three months, injecting new vitality into the healthy development of the industry.

It is learned that this conference is co-organized by Guangdong Advanced Titanium Dioxide Industry Research Institute, Guangzhou Huangpu Tiantai Chemical Light Industry Co., Ltd. and Tiantai (Fujian) New Materials Technology Co., LTD. Anhui Jinlong Machinery Co., LTD., Nantong Ganhan Environmental Engineering Co., Ltd. and Hunan Xiangtan Huibo Centrifuge Co., Ltd. also participate in the co-organization of the conference.