High Titanium Slag is commonly known as the titanium ore enrichment formed through the physical production process. The titanium ore is heated and melted by an electric furnace to melt and separate the titanium dioxide and iron in the titanium ore, which is a high-content titanium dioxide enrichment. High titanium slag is neither a waste residue nor a by-product, but a high-quality raw material for the production of titanium tetrachloride , titanium dioxide and titanium sponge products. Titanium slag is smelted from Ilmenite.   status color   The general state is powdery and black. The particle size is 40-200 mesh (Mesh). Supplied in powder form, the total amount of particle size between 0.425mm and 0.075mm is not less than 75%.   Application areas   1. High titanium slag with a TiO 2 content greater than 90% can be used as a raw material for the production of titanium dioxide by chlorination method 2. High-titanium slag with less than 90% TiO 2 is a high-quality raw material for the production of titanium dioxide by sulfuric acid method. Prospect analysis As the global consumption of titanium dioxide and titanium sponge continues to grow, the demand for high titanium slag has been on a straight upward trend. In recent years, the annual global high-titanium slag transaction volume has exceeded US$1 billion. High titanium slag is commonly known as a titanium ore enrichment formed through a physical production process. The titanium ore is heated and melted by an electric furnace to melt and separate the titanium dioxide and iron in the titanium ore, which is a high-content titanium dioxide enrichment. High titanium slag is neither a waste residue nor a by-product, but a high-quality raw material for the production of titanium tetrachloride, titanium dioxide and titanium sponge products. In recent years, my country’s titanium dioxide and titanium sponge industries have developed rapidly. Due to the high titanium content of high-titanium slag, the production (processing) of “three wastes” is small, the utilization rate of resources and energy is high, and it can help improve product quality. my country’s high-titanium slag The demand is growing rapidly. Although the domestic production of high titanium slag is constantly expanding, it still cannot meet the strong domestic demand. my country also needs to import a large amount of high titanium slag every year to supplement the gap. my country’s high-titanium slag industry still shows a situation of insufficient supply. In the next few years, my country’s high-titanium slag will still need to be imported in large quantities. my country’s titanium slag production technology level is at the bottom in the world. The overall scale of high-titanium slag production enterprises is small and their competitiveness is not strong. In 2005, there were only about a dozen companies producing and processing high-titanium slag in China. By 2006, the number of domestic companies had increased, but the overall quality was not strong. Except for Panzhihua Iron and Steel Co., Ltd. , a large company, the rest of the companies produced The output of high titanium slag is less than 10,000 tons. In 2007, the number of companies producing high titanium slag in my country increased rapidly, growing to more than 60 companies, and the strength of the companies is growing. At the end of 2008, the Tariff Commission of the State Council issued the “2009 Tariff Implementation Plan”. According to the plan, the import of high-titanium slag (titanium dioxide mass fraction greater than 70%) (tariff number 38249099) in 2009 will continue to be reduced from the original most-favored-nation rate of 6.5% to 0 , sulfuric acid (Tariff No. 28070000) was reduced from the original MFN tax rate of 5.5% to 0. At the same time, the tentative tariff for the export of titanium ore and its concentrate (Tariff No. 26140000) in 2009 was raised to 10%. According to the direction of the above tax rate adjustment, the country’s tendency to protect resource-based raw materials is relatively obvious. After the implementation of the new tariff plan, domestic exports of titanium concentrate will be restricted, while imports of sulfuric acid and high-titanium slag should increase. There are currently about 70 titanium dioxide manufacturers in my country. Except for one in Jinzhou, which uses the chloride process, the others all use the sulfuric acid process and the raw materials used are mainly titanium concentrates. In recent years, titanium dioxide production companies have realized the advantages of high titanium slag and gradually turned to high titanium slag to produce titanium dioxide. For a long period of time in the future, titanium dioxide and metal sponge titanium products using high titanium slag as raw materials will still be key projects encouraged to develop in the adjustment of the national industrial structure. As a primary mineral product in short supply, high titanium slag has a very broad market prospect. Some relatively powerful domestic companies, such as Fengcheng Qianyu Titanium Industry Co., Ltd. , have begun to independently develop high-quality high-titanium slag. Some leading companies have invested huge capital to introduce advanced foreign technology and large-scale equipment for the production of high-titanium slag. . Increasing research and development efforts and using its technological advantages to produce high-quality, high-yield products to compete with peers and seize the market will become the biggest competitive trend in the development of the high-titanium slag industry.  

Titanium sponge is the raw material for titanium processing materials. Generally, they are light gray particles with a clean surface and no visible inclusions. They also include defective titanium sponge blocks, such as over-burned titanium sponge blocks, oxidized titanium sponge blocks with obvious dark yellow and bright yellow, and Dark yellow and bright yellow traces of oxidized and nitrogen-rich titanium sponge blocks, titanium sponge blocks with obvious chloride residues, titanium sponge blocks with residues, etc.   Sponge metal titanium produced by metal thermal reduction method . Purity % (mass) is generally 99.1 ~ 99.7. The total impurity element % (mass) is 0.3 to 0.9, the impurity element oxygen % (mass) is 0.06 to 0.20, and the hardness (HB) is 100 to 157. It is divided into five grades from WHTiO to MHTi4 according to the purity. It is the main raw material for making industrial titanium alloys . Titanium sponge production is the basic link in the titanium industry. It is the raw material for titanium materials, titanium powder and other titanium components. Turn the ilmenite into titanium tetrachloride , put it into a sealed stainless steel tank , fill it with argon gas , and react it with the metal magnesium to get “sponge titanium”. This kind of porous “titanium sponge” cannot be used directly. They must be melted into liquid in an electric furnace before they can be cast into titanium ingots.   basic knowledge   Sponge metal titanium produced by metal thermal reduction method. Purity % (mass) is generally 99.1 ~ 99.7. The total impurity element % (mass) is 0.3 to 0.9, the impurity element oxygen % (mass) is 0.06 to 0.20, and the hardness (HB) is 100 to 157. It is divided into five grades from WHTiO to MHTi4 according to the purity. It is the main raw material for making industrial titanium alloys. Titanium sponge production is the basic link in the titanium industry. It is the raw material for titanium materials, titanium powder and other titanium components. Turn the ilmenite into titanium tetrachloride, put it into a sealed stainless steel tank, fill it with argon gas, and react it with the metal magnesium to get “sponge titanium”. This kind of porous “titanium sponge” cannot be used directly. They must be melted into liquid in an electric furnace before they can be cast into titanium ingots.   discover history   At the end of the 18th century, the British clergyman and amateur mineralogist William Gregor and the German chemist M.H. Klaproth came from the same place in 1791 and 1795 respectively. A new element was discovered in a black magnetite sand (later learned to be titanium magnetite ) and a non-magnetic oxide mineral (later learned to be natural rutile ore), which they called “Monaquin” respectively. ” (the name of the place where titanium magnetite was found) and “titanium clay”. A few years later, it was proven that the so-called “menacun” and “titanium” found in these two minerals were actually oxides of the same element, and this new species was named after the Titans (Titans), the Hercules in Greek mythology. The element is “Titanium”.   It took 120 years from the discovery of titanium to the first preparation of relatively pure titanium metal . It took nearly 40 years from the first time pure titanium was obtained in the laboratory to the first industrial production. Many researchers made a lot of explorations and suffered failures again and again. Finally, in 1948, DuPont succeeded and produced tonnage-level sponge titanium and porous titanium.   Process and equipment   Large-scale titanium metallurgical enterprises are all magnesium-titanium joint enterprises, and most manufacturers adopt the reduction-distillation integrated process. This process is called a combined method or a semi-combined method, which realizes a closed-circuit cycle of the raw material Mg-Cl2-MgCl2 .   The reduction-distillation integrated equipment is divided into two types: inverted “U” type and “I” type. The inverted “U” type equipment is formed by connecting the reduction tank ( distillation tank ) and the condensation tank with a pipe with a valve. It is equipped with a special heating device and the entire system equipment is assembled at one time before reduction. If the system equipment of the “I” type integrated process is assembled at one time before reduction, it is called combined method equipment; and the reduction equipment is assembled first, and after the reduction is completed, the condensation tank is assembled while it is hot for distillation operation. The equipment is called a series combination equipment and is connected by a “transition section” with a magnesium plug in the middle.   Industry status   During the past 10 years of rapid development, China’s titanium industry has seriously lost control. Many places have developed titanium projects amidst the “vigorous” rush of local protectionism , resulting in a serious oversupply in the titanium market. Although the use of titanium and titanium materials has increased year after year, But it cannot change the current situation that actual production capacity is far greater than demand. For example, in 2012, although the total amount of titanium materials was more than 60,000 tons, which was a significant increase compared with the previous year, the export of titanium ingots increased significantly. The total inventory of titanium ingots of many titanium material processing companies such as Baosteel and Bao Titanium was more than 5,000 tons. In addition, the country It also purchased and stored 4,000 tons of titanium ingots. It can be seen that the domestic titanium production has increased significantly, but the demand has not increased simultaneously. On the contrary, it can be seen that the development of the foreign titanium industry is relatively rational, unlike domestic development that is “progressing” out of control.   In 2012, the economy began to recover, but China’s titanium industry market is still sluggish. However, we must not blame it for the financial crisis and the European debt crisis . Instead, we must find reasons for our own out-of-control development. Otherwise, various economic crises will It’s over, but the development crisis of China’s titanium industry, which is desperately trying to launch projects, still exists. Looking at the development route of my country’s titanium industry over the past 10 years, we can see such a cycle accompanied by labor pains: the first expansion of production → the first reshuffle → the second expansion of production → the second reshuffle… my country’s titanium industry From the development of the 1960s to 2004, both titanium and titanium material processing capacity were very small. For example, at the end of 2000, my country’s titanium sponge production was 2,000 tons. However, as the demand for titanium gradually increased at the end of 2004, by 2005, sponge The price of titanium has risen from 50,000 to 60,000 yuan per ton to 200,000 to 300,000 yuan per ton, and huge profits have begun to appear. The titanium field has quietly experienced its first large-scale expansion. In just a few years, production capacity has increased. It quickly doubled more than 60 times. After expansion, adjustment, pain, and reshuffle, the actual production of titanium sponge in my country in 2012 increased by more than 40 times compared with 2000. 

Titanium ore refers to minerals containing a large amount of titanium ore. The main ones utilized in China are ilmenite , rutile and titanium magnetite .   Raw material characteristics   Titanium is a typical lithophile element and often appears as an oxide mineral. There are more than 80 kinds of minerals containing more than 1% TiO2 in the earth’s crust, and 15 kinds have industrial value. The main ones used in China are ilmenite , rutile and titanium magnetite (Table 3.5.1). They are both primary (rock minerals) and secondary (weathered residual slope accumulation and sedimentary sand minerals ).   Properties of titanium   Because titanium metal is silvery white, it has a high melting point (1727°C), light specific gravity (4.5), high mechanical strength (5), low temperature resistance (resistivity is almost 0 at ultra-low temperatures), abrasion resistance, and good plasticity of titanium wire (can Thin-walled use), not easily oxidized, and highly reducible; the oxide of titanium, titanium dioxide (titanium dioxide), is non-toxic and has good physical and chemical stability (it does not melt in any acid and alkali after calcining at 1000°C) , high refractive index (2.55~2.70), as well as strong whiteness, tinting power (1150~1650), hiding power (40~50g/m2), temperature resistance, anti-powdering and other characteristics, it is called “pigment” King of”. Therefore, titanium and its oxides and alloy products are important coatings, new structural materials, and anti-corrosion materials . They are known as “the third metal in development after iron and aluminum” and “strategic metals”, and are also “promising” Metal materials” are widely used in aviation, aerospace, ships, military industry, metallurgy, chemical industry, machinery, electricity, desalination, transportation, light industry, environmental protection, medical equipment and other fields, and have created a huge economy Benefits and social benefits play an important role in the development of the national economy.   Economic Indicators   Titanium raw materials are mainly used to produce titanium dioxide ( titanium dioxide ), titanium metal (titanium sponge), titanium-containing steel and welding rod coatings. Their proportions are slightly different in my country and abroad. Titanium dioxide accounts for 88% in China and 92.4% abroad; titanium metal (titanium sponge) accounts for 10% in China and 5.3% abroad; titanium-containing steel and welding rod coatings account for 2.0% in China and 2.3% abroad.   Titanium dioxide is not only a white pigment with excellent performance, but also an important chemical raw material. It is widely used in coatings, inks, plastics, rubber, paper and chemical fiber industries. Titanium dioxide coating has bright colors and pure tones; titanium dioxide is a high-grade filler for paper, making the paper thin and opaque, with high whiteness, good gloss, high strength, smoothness and easy use. Titanium dioxide is used in the plastic industry as an opaque colorant ; in the rubber industry, it makes white and light-colored rubber have high strength, high elongation, aging resistance and resistance to fading. It is also the best matting material for chemical fibers , giving transparent chemical fibers a permanent matting effect and improving toughness. In addition, it is also used in enamel, electrical appliances, electronic materials, etc.   After titanium concentrate is smelted into sponge titanium, it is then cast into ingots and made into industrial pure titanium and titanium alloy titanium materials. Titanium and Titanium Alloys Titanium materials are mainly used in the aviation and aerospace sectors. Compared with alloy steel, titanium alloy can reduce the weight of aircraft by 40%. Others, such as artificial satellite shells, spacecraft skins, rocket engine casings, missiles, etc., titanium alloys can all show their talents. The use of industrial pure titanium and titanium alloys in non-aerospace sectors is mainly in power station condensers, seawater contact devices, chemical devices and some mechanical engineering. In particular, the use of titanium for seawater desalination heaters is an epoch-making event in the development of the titanium industry. The ordnance industry department mainly uses titanium for the production of ships and weapons.   In addition to being mainly used to produce industrial pure titanium and titanium alloys, titanium metal is also used to produce titanium ferroalloys and titanium-containing steel for the steel industry. Titanium is an added element in steel that can change the properties of steel. Make steel have higher strength and hardness under the same tempering temperature, or temper to a higher temperature under the same hardness requirements. China’s titanium-containing steels include high-strength low-alloy steels, structural steels, stainless steels, heat-resistant alloys , ultra-high-strength steels and magnetic steels. They are widely used in automobiles, ships and oil drilling, and have developed into a The second largest steel series of manganese steel.   Rutile, the main titanium-containing mineral , is also an indispensable raw material for high-quality welding rod coatings.   A brief history of mining   In 1789, the British amateur mineralogist Father William Gregor discovered a new element (titanium) in the black magnetic sandstone ( ilmenite ) in the Manakin Valley in his parish, Gonaval State. It was named “Menaccanite” at the time.   In 1795, the German chemist MHKlaproth discovered a new metal oxide , which is now rutile (TiO2), while conducting systematic analysis and examination of rock minerals. He named this new element as In Greek mythology, the Titans, the sons of heaven and earth, were named Titanium. “Titanium” is what Gregor calls “Mernaginite”.   industrial development   The geological exploration of China’s titanium ore resources was mainly carried out in the 1950s and 1960s after the founding of the People’s Republic of China, and was successively put into development. The deep processing and utilization of China’s titanium ore resources (production of titanium dioxide , welding rod coatings, titanium sponge, titanium metal, titanium materials, etc.) began in 1954 when the Beijing Nonferrous Metals Research Institute developed sponge titanium. In 1958, the Shenyang Nonferrous Metals Processing Plant was built. The titanium sponge and titanium material processing workshop was put into operation. In the late 1960s, a titanium industrial system began to be formed (producing titanium sponge, titanium processing materials and other products). By 1997, China’s titanium industry had formed a mining-smelting-processing and scientific research-design- Production and application are two interrelated and relatively complete systems. my country is one of the world’s exporters of titanium concentrate, wrought titanium, titanium products, titanium oxide and anatase titanium dioxide pigments.

Titanium dioxide is an important inorganic chemical pigment whose main component is titanium dioxide. There are two production processes for titanium dioxide: sulfuric acid method and chlorination method. It has important uses in industries such as coatings, inks, papermaking, plastics and rubber, chemical fibers, and ceramics.

Titanium dioxide is an inorganic compound with the chemical formula TiO2. It is a white solid or powdery amphoteric oxide with a molecular weight of 79.866. It is non-toxic, has the best opacity, best whiteness and brightness, and is considered to have the highest performance in the world today. The best white paint. Titanium white has strong adhesion, is not prone to chemical changes, and is always white. Widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. It has a high melting point and is also used to make refractory glass, glazes, enamels, pottery, high-temperature resistant experimental vessels, etc. Titanium dioxide can be extracted from rutile by acid decomposition or obtained by decomposing titanium tetrachloride. Titanium dioxide exists in three allotropic forms in nature: rutile, anatase and plate titanium. In addition, there are several artificially synthesized crystal forms.   On October 27, 2017, the World Health Organization’s International Agency for Research on Cancer released a preliminary reference list of carcinogens. Titanium dioxide is included in the list of Class 2B carcinogens.   Relative density   Among commonly used white pigments, titanium dioxide has the smallest relative density. Among white pigments of the same mass, titanium dioxide has the largest surface area and the highest pigment volume. Pigment name   Dielectric constant   Due to its high dielectric constant, titanium dioxide has excellent electrical properties. When measuring certain physical properties of titanium dioxide, the crystallographic direction of the titanium dioxide crystals should be considered. For example, the dielectric constant of the rutile type varies with the direction of the crystal. When it is parallel to the C-axis, the measured dielectric constant is 180, when it is at right angles to this axis, it is 90, and the average value of its powder is 114. The dielectric constant of anatase titanium dioxide is relatively low, only 48.   Conductivity   Titanium dioxide has semiconductor properties, its conductivity increases rapidly with temperature, and it is also very sensitive to oxygen deficiency. For example, rutile titanium dioxide is an electrical insulator at 20°C, but when heated to 420°C, its conductivity increases 107 times. Slightly reducing the oxygen content will have a special impact on its electrical conductivity. According to the chemical composition, the electrical conductivity of titanium dioxide (TiO2) is <10-10s/cm, while the electrical conductivity of TiO1.9995 is as high as 10-1s/cm. The dielectric constant and semiconductor properties of rutile titanium dioxide are very important to the electronics industry, which uses these properties to produce electronic components such as ceramic capacitors.   Hardness   According to the 10-point Mohs hardness scale, rutile titanium dioxide is 6~6.5 and anatase titanium dioxide is 5.5~6.0. Therefore, anatase type is used in chemical fiber matting to avoid wearing the spinneret holes.   Application areas   Industrial applications   Titanium dioxide is an important white pigment and porcelain glaze. Used in paint, ink, plastic, rubber, paper, chemical fiber, watercolor pigment and other industries.   Titanium dioxide is the whitest thing in the world. 1 gram of titanium dioxide can paint an area of more than 450 square centimeters snow-white. It is 5 times whiter than the commonly used white pigment – zinc barium white, so it is the best pigment for preparing white paint. The amount of titanium dioxide used as pigment in the world reaches hundreds of thousands of tons per year. Titanium dioxide can be added to paper to make the paper white and opaque. The effect is 10 times greater than other substances. Therefore, titanium dioxide must be added to banknote paper and art paper.   In order to lighten the color of plastic and soften the luster of rayon, titanium dioxide is sometimes added. In the rubber industry, titanium dioxide is also used as a filler for white rubber.   The photochemical properties of semiconducting titanium dioxide have made it useful in many areas such as air, water and fluid purification. Photocatalysts doped with carbon or other heteroatoms can also be used in sealed spaces or areas with scattered light sources. When used in coatings on buildings, pavements, concrete walls or roof tiles, they can significantly increase the breakdown of airborne pollutants such as nitrogen oxides, aromatics and aldehydes.   Ultra-fine titanium dioxide has excellent UV-shielding properties and transparency. It is widely used in cosmetics, wood protection, food packaging plastics, durable household films, man-made and natural fibers, and clear coatings. The special optical effects in metallic glitter paints have attracted attention and application in high-end car paints.   Titanium dioxide is a semiconductor with small particle size, large specific surface area, loose porous, and rough surface. It is widely used as photoanode material in dye-sensitized solar cells. Many researchers use titanium dioxide as a prototype and conduct hydrothermal method on it. , electrospinning and other methods for modification, and at the same time, metal substances, inorganic substances and other doping reactions are used to prepare photoanode with excellent performance, and then assembled into dye-sensitized solar cells.   Titanium dioxide can effectively prevent the unbridled growth of microorganisms through photocatalysis, thereby reducing the amount of harmful environmental components. The antibacterial mechanism is that titanium dioxide is activated by light, and the interaction between electron hole pairs, oxygen molecules, and hydroxide ions stimulates free radicals, causing a chain reaction, destroying bacterial proteins, and achieving the sterilization effect.   Food application   The U.S. Food and Drug Administration stipulates that titanium dioxide can be used as a white pigment in all foods, and the maximum usage amount is 1g/kg. The pigment additive titanium dioxide can be safely used in general coloring foods, subject to the following regulations:   (1) The amount of titanium dioxide does not exceed 1% of the weight of the food.   (2) Colored foods shall not be used in accordance with the special standards promulgated in Article 401 of the Act, unless there are similar standards that allow the addition of pigments.   (3) For colored foods, the edible pigment additive titanium dioxide can contain appropriate diluents as safe pigment additives, as follows: Silica, as a dispersing aid, the content does not exceed 2%.   Product adaptability: cold fruits, jelly, fried foods, cocoa products, chocolate, chocolate products, hard candies, polished candies, gum-based candies, puffed foods, candy chocolate product coatings, mayonnaise, salad dressing, jam, solids Beverages, konjac gel foods, etc.   Environmental Protection   Purifying air   Titanium dioxide, as a catalyst for light coating pigments, is not only an environmentally safe cleaner, but also can save energy and protect environmental resources.   Early Japanese and British scientists coated titanium dioxide on the surface of paving stones on urban roads to clean the road air. Titanium dioxide can be mixed with asphalt to reduce airborne pollutants. Concrete or asphalt containing titanium dioxide can purify the air as cars pass by, eliminating 25% to 45% of nitrogen oxides in vehicle emissions. Coating titanium dioxide on the concrete surface has an equally effective air cleaning effect   Cool the earth   In May 2012, British scientists proposed a bold idea. They believed that the purpose of cooling the earth could be achieved by spraying enough titanium dioxide into the stratosphere to reflect sunlight. This could effectively offset the various effects of global warming. adverse climate factors.   Because titanium dioxide can effectively reflect direct sunlight, has stable properties and has good hiding ability, it can work for a long time if sprayed in the stratosphere. British scientists proposed that high-altitude balloons can be used to bring this chemical into the stratosphere and then release it. Once titanium dioxide is evenly distributed in the Earth’s stratosphere, it can effectively reflect sunlight and thereby cool the Earth.   Peter Davidson, a chemical engineer and president of the British consulting company Davidson Technology, is the person in charge of this project. He said that only 3 million tons of titanium dioxide need to be transported to the earth’s stratosphere to form a layer of thickness in the earth’s stratosphere. A 1mm protective layer, but the effect it can play is huge – enough to offset the greenhouse effect caused by twice the current amount of carbon dioxide in the atmosphere.   Sunscreen Cosmetics   Because ultraviolet rays are very harmful to the human body, developed countries have paid more attention to the research and development of sunscreen products in recent years, and have successively launched a variety of anti-UV fibers, plastics, films, coatings, as well as sunscreen creams, foundations, and lipsticks. , mousse, baking ointment and other sunscreen cosmetics. In recent years, our country has also increased the research and production of sunscreen cosmetics.   However, in the past, sunscreens were mostly organic compounds such as benzophenones, o-aminobenzophenones, salicylates, para-aminobenzoic acids, and cinnamates. Therefore, they were unstable, had a short lifespan, and had serious side effects. , has certain toxicity and irritation. If added in excess, it will cause chemical allergies and may even lead to skin cancer. Nano-titanium dioxide is an inorganic component, has excellent chemical stability, thermal stability and non-migration, strong achromatic power, hiding power, low corrosiveness, good dispersibility, and is non-toxic, odorless, Non-irritating, safe to use, and also has sterilizing and deodorizing properties. More importantly, as mentioned above, nano-titanium dioxide can not only absorb ultraviolet rays, but also emit and scatter ultraviolet rays, so it has strong anti-ultraviolet ability. Compared with the same dose of organic anti-ultraviolet agents, its absorption peak in the ultraviolet region is Higher; and nano-titanium dioxide has a blocking effect on both medium-wave and long-wave ultraviolet rays, unlike organic anti-UV agents that only have a shielding effect on medium-wave or long-wave ultraviolet rays. In particular, due to its finer particles, the finished product has high transparency and can transmit visible light. When added to cosmetics, the skin will be naturally white, overcoming the shortcomings of some organic matter or pigment-grade titanium dioxide that are opaque and make the skin appear unnaturally pale. Because of this, nano-titanium dioxide quickly received widespread attention and gradually replaced some organic anti-UV agents, becoming a physical shielding anti-UV agent with superior performance in today’s sunscreen cosmetics.   As people’s living standards improve and international competition intensifies, the research and development of safe and efficient sunscreen cosmetics will gradually increase. Today, the sunscreen cosmetics market in developed countries has shown strong vitality. From 1999 to 2000, annual sales in the United States reached US$737 and US$765 million respectively, and in the UK reached US$245 and 270 million respectively. In recent years, they have grown at rates of more than 20% and 10% respectively, and the amount of nano-titanium dioxide has also increased year by year. magnitude growth. The annual demand for nano-titanium dioxide in Japanese anti-UV cosmetics is more than 1,000t, and the amount used in textiles, plastics, and rubber products is even greater.   Judging from the development trend of sunscreen cosmetics, one is inorganic sunscreen agents replacing organic sunscreen agents, and the other is bionic sunscreen. The latter costs more and is difficult to promote now. The former is moderately priced and has excellent sun protection properties, so it is generally favored. In particular, nanometer titanium dioxide has good development momentum and market potential due to its superior performance and application prospects.