China's titanium dioxide production technology is suitable for the national conditions day by day to improve the industry's business climate up

China Coatings network
: It is understood that the world's mature
tumium dioxide
production process is mainly sulfuric acid and chlorination two. The main disadvantages of sulfuric acid method are the long process and the need for waste sulfuric acid treatment. Since the beginning of the last century, europe and the United States, due to environmental pressure gradually eliminated some backward technology and serious pollution of titanium sulfate production plant, began a large-scale expansion of the production line of titanium dioxide chloride. Chlorination production is redstone-type titanium white powder, the process is short, high degree of automation, large production capacity, especially the use of high-quality titanium dioxide containing 90% of titanium dioxide, chlorination produced less slag, easy to handle.
At present, more than 95% of Enterprises in China still use the traditional sulphuric acid production process, sulphuric acid method can produce sharp titanium type and redstone type titanium dioxide powder, sulfuric acid method can also be low-cost and easy-to-get titanium iron ore and sulfuric acid as raw materials, more mature technology, simple equipment, corrosion-resistant materials easy to solve Coupled with the early invention of the production process of titanium dioxide by sulphuric acid method, by 1923, the process has entered the world into a long-term, countries all over the world have begun to use sulfuric acid technology to produce sharp titanium-type titanium dioxide products, sulfuric acid method production process is relatively mature compared to chlorination method, so most of China's enterprises choose sulfuric acid method. However, we also see that China's sulfuric acid method experienced the production of 100 to 150 tons of fresh water per ton of titanium dioxide powder consumption, comprehensive energy consumption of about 1.6 tons of standard coal, while producing a concentration of about 20% of the waste sulfuric acid 8 tons, acid wastewater 100 tons, waste residue 8 tons, as well as sulfur dioxide, acid fog and dust exhaust gas 25,000 cubic meters. Titanium dioxide by sulphuric acid is listed as restricted development (product quality meets international standards, waste acid, iron can be used comprehensively, and achieve the emission standards except).
years of groping practice, China's current sulfuric acid process control and perfect coating technology has narrowed the gap with chlorination product quality, products can be comparable with chlorination. Although the waste acid emissions produced by sulphuric acid method are more environmental pollution, but the vast majority of waste acid can be concentrated and recycled, a small amount of waste acid water can be mediumed to meet the standard emissions, waste slag can be made into calcium sulfate for comprehensive utilization. For example, sichuan Longyu Titanium White Co., Ltd. developed the "titanium dioxide - sulfuric acid - phosphorus chemical" cycle production chain and the new method of titanium dioxide clean production process by the National Development and Reform Commission as a "circular economy, comprehensive utilization" example; According to the spray-enriched phosphoric acid process in phosphorus chemical production, Sichuan Longyu Group has developed a spray-enriched treatment of waste acid technology. The process is for titanium dioxide waste acid to be concentrated to 45% at a time through a spray enrichment tower, which is used to produce phosphoric acid in reaction with phosphorus ore, and finally to produce phosphorus fertilizer. The gas entering the spray enrichment tower purifys the exhaust gas from coal-fired, boiler's high-temperature exhaust, natural gas or fuel combustion. This process simplifies the process of waste acid concentration, eliminates equipment such as heat exchangers, and can use boiler exhaust waste heat to reduce the cost of concentration.
(002601, stock bar) company waste and by-products of the comprehensive use, waste heat utilization, waste water recycling, better achieve the goal of clean production and the development of circular economy concept. Compared with the traditional production process of titanium dioxide by sulphuric acid method, the comprehensive energy consumption of tons of titanium dioxide was reduced from 2.19 tons of standard coal to 1.23 tons of standard coal. The discharge of tons of titanium dioxide wastewater was reduced from more than 100 tons to less than 60 tons. The sulfur, iron, titanium andmaterials were reasonably recycled, and the total yield of titanium increased from less than 82% to more than 87%. Product varieties from a single variety to more than 10 kinds; Product quality indicators continue to improve, energy consumption decreased by about 40%, water consumption decreased by 35%, electricity consumption decreased by 13%, natural gas consumption decreased by more than 10%, and achieved good economic and environmental benefits.
, most of the backbone enterprises have changed the sulphuric acid method to produce titanium dioxide raw material route, the use of high-quality acid-soluble titanium slag. With advances in technology, high-quality titanium dioxide can be produced by both sulphuric acid and chlorination.
Although the titanium dioxide industry "three waste" production is large, but can not therefore be regarded as a heavy pollution industry, the key is to see whether the source of pollution can be treated, there is no treatment. China's titanium dioxide industry "three waste" governance, comprehensive utilization of resources technology and facilities have matured, the main enterprises continue to increase the "three waste" governance and environmental protection investment, fully capable of achieving the country's energy conservation and emission reduction and clean production goals.
current annual production capacity of more than 40 major titanium dioxide production enterprises can be in accordance with environmental protection requirements for the "three waste" comprehensive management, and basically meet emission standards. In the process of promoting comprehensive utilization and realizing circular economy, titanium dioxide production enterprises have also achieved substantial results. With the further improvement of the environmental protection level of the whole industry, the sulfuric acid titanium dioxide industry will usher in a better development
The technology of titanium dioxide by chloride is more advanced and more environmentally friendly than sulphuric acid, which has become the consensus of international titanium dioxide production enterprises, and only Jinzhou Titanium Co., Ltd., which is controlled by China CITIC Group, is fully produced using chlorination process. Then why many enterprises in our country do not choose chlorination method, but choose sulfuric acid method. Which method is adapted to china's national conditions? It's the best thing to adapt to us. Let's make a simple comparison between the two approaches.
the advantages of the production process is short process, easy to expand production capacity, high degree of continuous automation, relatively low energy consumption, "three waste" less, can get high-quality products. However, the disadvantage is that chlorination method can only produce redstone-type titanium dioxide powder, large investment, complex equipment structure, high material requirements, to withstand high temperature, corrosion resistance, the device is difficult to maintain, research and development is difficult. At present, 54% of the world's total production of titanium dioxide is chlorinated products, of which more than 80% are produced in the United States DuPont, Coster, Turno and Huntsman four companies.
chlorinated method compared to sulfuric acid method to environmental protection, more advanced technology, better quality products, but the advantages of sulfuric acid method chlorination method can not be taken into account, China's titanium dioxide network small editor thought that according to China's national conditions, these two methods in a certain historical period will be sulfuric acid method and chlorinated titanium dioxide production go hand in hand, to give us a certain amount of time to digest chlorination technology, avoid blindly a honeycomb horse.
China's Jinzhou titanium chlorination production of titanium dioxide process and devices after digestion, absorption and introduction of technology and innovation, production equipment has all achieved localization, more strikingly, Jinzhou titanium industry using molten salt chlorination technology and gas phase oxidation technology docking is the world's first case, and melting salt chlorination is more suitable for the domestic situation of titanium resources. In September 2013, the project of chlorinated titanium dioxide in Xingmao, Weihe, carried out the trial production phase, and in September 2014 the project trial production achieved a continuous and uninterrupted full-load operation of the whole process for 99 hours, product quality by the national
coatings
quality supervision and testing center comprehensive testing, titanium white powder production indicators have reached the international advanced similar product quality standards. Yunnan Xinli also said that the problem of low production capacity of domestic chlorinated furnaces, daily production capacity of 500 tons, to overcome the oxidation system particle size distribution, redstone conversion rate and other oxidation system core issues. At present, the project is in the test stage, has completed a continuous run of 72 hours of joint test drive of the major nodes, to achieve a maximum load of 75%, in 70% of the load want to be able to run stable for a long time.
Can be seen that the domestic chlorinated titanium dioxide will change Jinzhou titanium industry "a unique" status quo, has now entered the stage of all-round development, whether yunnan Xinli or Weihe Xingmao, for 2015 production in terms of quality and output have a higher expectation of improvement. And its production capacity has continued to improve plans, of which Luhe Xingmao plans to continue to increase production of 60,000 tons / year chlorinated titanium dioxide in 2015, and Yunnan Xinli new titanium chloride project has been launched in Lianyun Port (601008, stock bar) area of coastal chlorinated titanium white new Project, has completed research, program demonstration, preliminary design and other work, in addition to Yunnan Xinli, Weihe Xingmao, The Yuli cochlorination device has also been completed in the near future trial production, and Pansteel titanium industry also said that Pansteel now has the ability to build 100,000 tons of chlorinated titanium dioxide production line. It can be foreseen that the process of titanium dioxide by chloride will gradually speed up in the future, and the era of titanium dioxide by sulfate may come. The time is ripe for the large-scale development of titanium dioxide chloride, and its output will be greatly increased.
In China's titanium dioxide production technology is improving day by day at the same time, the industry integration is also in full swing, the domestic titanium dioxide industry between enterprises restructuring and joint operation is mainly reflected in the acquisition of China Nuclear Titanium White (002145, stock bar) acquisition of Gansu Oriental, China Nuclear Titanium White acquisition of Haup titanium industry, Cristal acquisition of Jiangxi, the most Explosive is that the merger of The merger of the titanium dioxide industry will have a profound impact on China's titanium dioxide market, the future industry merger and acquisition integration drama is expected to continue to be staged, 4 titanium dioxide listed companies are expected to become the industry integration of mergers and acquisitions of the front-line, the future of China's titanium dioxide industry is expected to form the same as foreign oligarch competition pattern, so that China's titanium dioxide industry on a reasonable and healthy development path.
the merger of Olilian and Longyu Titanium enhances not only the capacity, but also the integrity of the industrial chain, the richness of the product line and the comprehensiveness of the technology. Longyu titanium industry has a large-scale niobium titanium magnetite resources, and has more than 600,000 tons / year of titanium mineral extraction capacity, integration can be in the future for a longer period of time to ensure that the company's titanium dioxide production required titanium ore, the realization of "titanium magnetite - titanium ore - technology research and development - titanium dioxide production - titanium dioxide sales" of the complete industrial chain, improve the overall profitability and risk resistance. At the same time, the main product R996 in the market reputation is better, is a high-end products, after the merger will fully cover the high and low-grade titanium dioxide market; After the merger, the accumulation of the two sides in technology research and development can be shared, to enhance the quality of products, waste comprehensive utilization level and environmental protection management capacity have a greater role; In addition, the company chlorinated titanium dioxide production line is about to start production, the future in the new process, the space for cooperation between the two sides is also very large; So this merger we think is a comprehensive improvement of the company's competitiveness, the future development is worth looking forward to.
In 2015, China's titanium dioxide industry supply and demand pattern will be further improved, the landing of a number of national policies, production technology is improving, restructuring and integration in full swing, we have reason to believe that the average price of Titanium white powder in China will rise to become reasonable, the future industry competition pattern will continue to improve, leading enterprises will significantly enhance the industry's control capacity, China's titanium white powder industry in the future trend of upward prosperity has been very clear, the industry health norms are imperative.