cas no.13463-67-7 titanium dioxide factories

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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cas no.13463-67-7 titanium dioxide factories2025-08-14 06:48
784

Titanium dioxide is not unfamiliar to those involved in the chemical industry. Titanium dioxide is currently the highest-quality white pigment in the world, mainly used in plastics, coatings, paper, ink, chemical fiber, cosmetics and other industries. So what are the top five brands of titanium dioxide in China with good reputation? Let’s take a look.

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cas no.13463-67-7 titanium dioxide factories2025-08-14 06:42
2168

This article discusses the discovery of phosphorescent lithopone on watercolor drawings by American artist John La Farge dated between 1890 and 1905 and the history of lithopone in the pigment industry in the late 19th and early 20th centuries. Despite having many desirable qualities for use in white watercolor or oil paints, the development of lithopone as an artists’ pigment was hampered by its tendency to darken in sunlight. Its availability to, and adoption by, artists remain unclear, as colormen's trade catalogs were generally not explicit in describing white pigments as containing lithopone. Further, lithopone may be mistaken for lead white during visual examination and its short-lived phosphorescence can be easily missed by the uninformed observer. Phosphorescent lithopone has been documented on only one other work-to-date: a watercolor by Van Gogh. In addition to the history of lithopone's manufacture, the article details the mechanism for its phosphorescence and its identification aided by Raman spectroscopy and spectrofluorimetry.

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cas no.13463-67-7 titanium dioxide factories2025-08-14 06:36
1518

But what truly makes Lithopone 30% Quotes Factory stand out is its user-friendly interface. The platform is designed to be intuitive and easy to navigate, making it a breeze to find the perfect quote for any occasion The platform is designed to be intuitive and easy to navigate, making it a breeze to find the perfect quote for any occasion The platform is designed to be intuitive and easy to navigate, making it a breeze to find the perfect quote for any occasion The platform is designed to be intuitive and easy to navigate, making it a breeze to find the perfect quote for any occasionlithopone 30% quotes factory. Whether you're browsing through the extensive library or using the search function to find a specific topic, everything is laid out in a clear and concise manner.

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cas no.13463-67-7 titanium dioxide factories2025-08-14 04:58
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