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Comparison of Advantages and Disadvantages of Purification Methods for Graphite Manufacturers

1. Flotation Method: Graphite Manufacturer Introduction, flotation method is a more commonly used method, it is the mineral conventional purification scheme of energy consumption and reagent consumption of the least, the lowest cost, which is the flotation method to purify graphite the greatest advantage. However, using this method to purify graphite can only make the grade of graphite limited, and further improve the grade is very difficult, and the recovery of graphite is very low, so its application range is limited. To obtain high carbon content of about 99% carbon, the graphite must be purified by chemical method.

2. Acid-base method: Acid-base method is the most widely used method in high purity graphite manufacturers in China, in addition to having a one-time investment, product grade and adaptability, and other characteristics, but also has the advantages of easy to achieve, versatility, its disadvantage is the need for high-temperature sintering, melting, energy consumption, and the reaction time is long, equipment corrosion serious, graphite loss of large and serious waste water pollution.

3. Hydrofluoric acid method: Graphite manufacturer expounds that the most important advantage of hydrofluoric acid method is the high efficiency of impurity removal, high grade of product, small effect on graphite product performance and low energy consumption. The disadvantage is that hydrofluoric acid is highly toxic and strong corrosive, the production process must have strict safety precautions, for equipment requirements also lead to higher costs, the existence of fine flake graphite overflow, recovery under the problem. In addition, the toxicity and corrosivity of the wastewater produced by hydrofluoric acid method are very strong, which need to be treated strictly before discharging, and the input of environmental protection will greatly increase the cost of hydrofluoric acid method.

4. Chlorination Roasting method: The advantage of chlorination roasting method is that the low roasting temperature and chlorine consumption make the graphite production cost higher temperature method have a great decrease, at the same time, it has high purification efficiency (greater than 98%) and higher recovery rate. However, it is difficult to deal with the exhaust gas and serious pollution, which restricts the popularization and application of the method.

5. High-Temperature method: Graphite Manufacturers overview, the greatest advantage of high-temperature method is the high carbon content of products, up to 99.995%, the disadvantage is the requirement of high purity of raw materials, special design and construction of high-temperature furnaces, expensive equipment, huge investment, strict electric heating technology requirements. In addition, the high tariff also makes the application of this method is very limited, only the national defense, aerospace and other special requirements on the purity of graphite products to consider the use of this method for small-scale production of graphite.