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In recent years, China's titanium dioxide industry has developed rapidly and has become the world's largest producer of titanium dioxide. In the development of production at the same time, energy conservation, environmental protection and clean production research results are also very significant, a large number of obvious effects, advanced and applicable new energy conservation and environmental protection technology, new technologies in the industry has been popularized and applied, some technology has reached the domestic first, international advanced level, the whole industry, especially the sulphuric acid process is accelerating towards cleaner production direction. This is the reporter from September 9 to 10 in Tiantai, Zhejiang Province, the 2018 titanium dioxide clean production equipment conference to learn the information
China
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China's titanium dioxide industry mainly based on sulfuric acid process, its research and plant construction began in 1955, has gone through more than 60 years of development. The substantial development of the whole industry began in 1998, over the past 20 years, the annual production capacity of the industry increased from 198,000 tons to 3.2 million tons in 2017, with an average annual growth rate of more than 15%; Production also increased from 140,000 tons in 1998 to 2.87 million tons in 2017, with an average annual growth rate of more than 16%.
with the increase in production capacity, China's titanium dioxide industry in the international status is also rising. In 2009, China's total production capacity of titanium dioxide reached 1.8 million tons, surpassing the United States to become the world's first, and since then has been firmly ranked as the world's largest producer of titanium dioxide position.
Bi Sheng, director of the Titanium White Branch Center of the National Chemical Productivity Promotion Center and secretary-general of the Titanium White Powder Industry Technology Innovation Strategy Alliance, pointed out that sitting on the world's first throne for many years is not the ultimate goal of China's titanium dioxide industry. As the main body of China's titanium dioxide industry, the sulfuric acid method titanium dioxide industry in clean production there are natural deficiencies. It is also because of this, in recent years, under the guidance and reverse of the country's various ecological and environmental protection policies, sulfuric acid process has been continuously improved and advanced, in addition to the scale of production, production technology level, equipment level, environmental control level, waste comprehensive utilization level has reached a new height.
Bisheng pointed out that in terms of product quality, the products of large and medium-sized enterprises in the industry has a certain degree of market awareness, some brands can be applied to high-end areas, some and imported products, can be applied to the top areas. In addition, sulfuric acid products basically cover the downstream application market, which is not available in chlorinated products.
In environmental protection and clean production, acid-defying exhaust treatment, acid-defying tail slag re-use, titanium liquid low-temperature multi-effect concentration, calcined kiln exhaust residual heat return, MVR low-temperature evaporative titanium concentrate, titanium gypsum pressing and other technologies have been widely popularized in the industry. In 2017, Shandong Daun Titanium Co., Ltd. and Submarine River Round Titanium White Co., Ltd. were awarded the title of "Green Demonstration Factory" by the Ministry of Industry and Information Technology.
Zhenning, honorary expert of the National Titanium White Industry Expert Group, pointed out that taking the road of co-production is one of the important ways for the sustainable green development of titanium dioxide production enterprises in China. In the development of the industrial chain, enterprises in accordance with their own conditions and surrounding environmental characteristics, and gradually create conditions to embark on the road of joint production, to achieve quantitative reduction, reuse, resource-based circular development. Sichuan Longyu, Shandong Dongjia, Shandong Jinhai, Shandong Daon, Anhui Anada, Ningbo Xinfu, Guangxi Jinmao, Yunnan Datong, Jinan Yuxing, Submarine River Fangyuan, Jiangxi Tianguang and other backbone enterprises have launched sulfur-titanium, sulfur-phosphorus-titanium, sulfur-ammonium-titanium, sulfur-iron-titanium, sulfur-titanium, sulfur-titanium-gypsum-cement and other characteristics of the green industrial chain.
Tang Zhenning told reporters, such as Guangdong Huiyun Titanium Co., Ltd. to make full use of the surrounding environmental resources, the realization of sulfur-titanium-iron-calcium co-production, by-product iron sulfate part of the dehydrated production of a water sulphate iron mixed with iron sulfate mixed with sulfuric acid, another part of iron sulfate used to manufacture water purifier polymer iron sulfate. In the use of waste acid, the company has 1/3 of the waste acid directly exported to the steel plant pickle steel, the rest of the use of local stone processing plant corner materials and the production of white gypsum and red gypsum, red gypsum after high-pressure filter for cement plant use, the remaining part of the waste acid used in the production of manganese sulfate. The waste sulphuric acid discharged in the production process of enterprises is almost dried and squeezed clean, and the production cost of titanium dioxide is reduced by 1000 to 1500 yuan/ton accordingly.
Bisheng pointed out that China's sulphuric acid process now has a higher goal: First, on the basis of the existing further tap potential, and strive to continuously improve progress; Second, to waste sub-resource, low-emission or zero-emission direction, mainly refers to low concentration of waste acid, waste water purification treatment and reuse, as well as sludge (i.e. red plaster) of the resource utilization; Third, to further improve the quality of products, not only in terms of price than international advanced products competitive, but also in terms of quality and performance to catch up.
The good news is that the product quality of domestic sulphuric acid titanium dioxide enterprises is accelerating, such as Longyu Lilian, Shandong Dongjia, Pangang titanium, Ningbo Xingfu, Wuhan Fangyuan, Guangdong Yunfu, Kunming Dongyu, China Nuclear Titanium White, Jinpu Titanium Industry, Shandong Jinhai, Jinan Yuxing and other enterprises coating, plastic and other special sulfuric acid gold-stone titanium white powder quality, has reached or close to the international first-line product quality, has reached or near the international first-line product quality.
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