titanium dioxide manufacturers in china

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Wholesale talc refers to the bulk purchasing of talc powder, which is a naturally occurring mineral that is primarily composed of magnesium, silicon, and oxygen. Talc is widely used in the cosmetics industry for its ability to absorb moisture and oil, making it a popular ingredient in powders, dry shampoos, and makeup products. Additionally, talc is known for its soothing properties, making it a common ingredient in baby powders and body powders.

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In the pigment industry, rutile titanium dioxide is widely used due to its brightness and extremely high refractive index, which provides excellent hiding power in paints, plastics, paper, inks, fibers, and foods. It is the most common white pigment because of its non-toxicity, stability, and ability to reflect all colors of light equally. The use of rutile titanium dioxide in paint formulations ensures long-lasting, vibrant colors that are resistant to fading caused by exposure to sunlight.

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At present, the domestic wet zinc smelting mainly adopts the roasting-leaching-electrowinning production process, and the zinc content in the acid leaching residue is generally 8-15%, some up to 20%, and the sulfur mass fraction is 6-12%, of which sulfuric acid The root mass fraction is 15-30%, mainly in the form of 0^0 4 (in this ammoniatic environment, the leaching rate of sulfate leaching in multiple stages can reach 70%). The zinc in the acid leaching residue is mainly in the form of ZnFe 2 0 4 . In order to recover these zinc, the treatment methods are currently available in the fire method and the wet method. The fire method is the rotary kiln evaporation method (Wilz method) and the fumigating furnace evaporation method. . The wet method has hot acid leaching or high temperature pressure leaching. The fire treatment process is long, the equipment maintenance is large, the investment is high, the working environment is poor, and a large amount of coal or metallurgical coking coal is consumed, which has low efficiency and large environmental pollution. Therefore, it is usually leached by hot acid or high-pressure leaching. These methods still have the disadvantages of: 1 consumption of a large amount of acid, low leaching rate, due to the large amount of calcium sulfate, calcium sulphate and other ultrafine particles to isolate the zinc oxide particles, resulting in Electrolytic zinc enterprises are difficult to leach in acid environment, and the second weak acid leaching is not meaningful because the recovery rate is too low. 2 If leached with strong acid, although ZnFe 2 0 4 is destroyed, the leaching rate is improved, but the iron leaching rate is also high (up to 60%). The pressure of iron removal is large, and more reagents are consumed. 3 High temperature and high pressure equipment is corroded. Serious, complicated equipment investment; 4 high operating costs, poor economic returns. 5 The last slag discharged is acid leaching residue, which brings new pollution to the environment. It has to be cured and landfilled, which not only pollutes the environment, but also wastes resources.

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