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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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  • The food industry also relies on titanium dioxide for its ability to impart a bright white color to products like dairy products, confectionery, and baked goods
  • The cosmetics industry also harnesses the potential of HPMC. It is used in hair care products for its conditioning properties, in facial masks for its film-forming abilities, and in sunscreens for its ability to provide a smooth, even application.
  • HEC is known for its excellent thickening, stabilizing, and film-forming properties, which make it an essential ingredient in many products. In the pharmaceutical industry, HEC is used as a thickener in oral liquids, ointments, and creams. In the cosmetics industry, HEC is used in skin care products, hair care products, and makeup formulations. In the construction industry, HEC is used in cement and mortar formulations to improve workability and water retention.
  • Properties of Hydroxyethyl Cellulose
  • HPMC is an essential ingredient in skim coat formulations due to its unique properties. This polymer is specially designed to improve the workability, adhesion, and water retention of the skim coat mixture. When HPMC is added to the skim coat, it acts as a thickening agent, providing the necessary viscosity to ensure easy application and a smooth finish.
  • If you are looking for hydroxyethylcellulose for sale, there are a variety of suppliers and manufacturers that offer this versatile ingredient in a range of purities and grades. It is important to choose a reputable supplier that can provide you with high-quality hydroxyethylcellulose that meets your specific needs and requirements.
  • 5. Hydroxypropyl Methylcellulose can mix with water-soluble polymers and then form a uniform solution of higher viscosity, such as polyvinyl alcohol, starch ethers, and vegetable gums.

  • In the cosmetics industry, HPMC and CMC are used in various formulations, such as creams, lotions, and hair care products, as thickeners and stabilizers. They improve the texture and viscosity of these products and enhance their spreadability and long-lasting effects. HPMC is often used in sunscreens and moisturizers for its film-forming properties, while CMC is used in hair gels and sprays for its strong hold and humidity resistance.
  • How to Choose the Right HPMC?
  • VAE powder is a fine, free-flowing substance that combines the benefits of both vinyl acetate and ethylene. The vinyl acetate component imparts excellent adhesion and film-forming characteristics, while the ethylene contributes to improved flexibility and durability. This blend results in a product that is not only robust but also adaptable to various conditions and surfaces.
  • Is HPMC Soluble in Water?