The manufacturing method of Graphite The premise of the graphite deep processing industry is purification. Graphite purification is a complex physical and chemical process. The purification methods mainly include the flotation method, alkali acid method, hydrofluoric acid method, chlorination roasting method, and high-temperature method.
1. Flotation is a commonly used and important mineral processing method. Graphite has good natural buoyancy. All Graphite can be purified by flotation. To protect graphite scales, graphite flotation mostly adopts multi-stage process. Graphite flotation collectors generally use kerosene with an amount of 100-200g/t, and foaming agents generally use terpineol oil or butyl ether oil with 50-250g/t.Because graphite has good natural buoyancy, the flotation method can increase the grade of graphite to 80%-90%, even up to 95%. The biggest advantage of this method is that it has the least energy and reagent consumption and the lowest cost among all purification schemes.
2. The alkali-acid method includes two reaction processes: the alkali fusion process and the acid leaching process. The alkali fusion process is to use the alkali in the molten state to react chemically with the acidic impurities in Graphite under high-temperature conditions, especially silicon-containing impurities (such as silicate, aluminosilicate, quartz, etc.), to generate soluble salts, and then After washing to remove impurities, the purity of Graphite can be improved. The basic principle of the acid leaching process is to use acid to react with metal oxide impurities, which have not reacted with alkali during the alkali melting process. Convert metal oxides into soluble salts, and then wash them to separate them from Graphite. The combination of alkali fusion and acid leaching has a good effect on graphite purification.
3. Hydrofluoric acid is a strong acid that can react with almost any impurity in Graphite, and Graphite has good acid resistance, especially hydrofluoric acid resistance, which determines that Graphite can be purified with hydrofluoric acid. The main process of the hydrofluoric acid method is to mix Graphite and hydrofluoric acid; hydrofluoric acid and impurities react for a period time to produce soluble substances or volatiles, wash to remove impurities, dehydrate and dry to obtain purified Graphite 4. The chlorination roasting method is to mix Graphite and a certain reducing agent and roast at high temperatures under specific equipment and atmosphere. The valuable metals in the material are transformed into metal chlorides in the gas phase or condensed phase and are separated from the rest of the components to make the graphite Purification process. 5. The melting point of Graphite is 3850°C±50°C, which is one of the substances with the highest melting and boiling points in nature, much higher than the boiling point of impurity silicate. Using their differences in melting and boiling points, Graphite is placed in a graphitized graphite crucible. In a certain atmosphere, it is heated to 2700°C by using specific instruments and equipment so that impurities can be vaporized and escape from the Graphite to achieve the effect of purification. This technology can purify Graphite to more than 99.99%.
Price of Graphite particle size and purity will affect the product's price, and the purchase volume can also affect the cost of particle size. A large amount of large amount will be lower. The price of particle size can be found on our company's official website.
Graphite supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Zinc sulfide, nitride powder, Zinc sulfide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Graphite, you are welcome to contact us or inquire at any time.
