Graphis plays an important role in many industries and is a very important raw material. So what are the processing methods of graphite with different performance? Let me introduce it to you!

1. The mineral method of crystal graphite

Crystal graphite is naturally floating. In my country, the mineral selection is basically floating. Because the size of graphite tablets is one of its most important quality indicators, multi -level grinding and multiple sorting processes are adopted in the separation method to choose large graphite as soon as possible. The commonly used recovery agents are kerosene, diesel, etc. The foaming agent is No. 2 oil, No. 4 oil, etc., the regulator is lime and sodium carbonate, and the polymer is water glass.

2. Cultivation of crystal graphite mineral selection method

Cain crystal graphite crystals are very small, so it is also called micro -graphite. Graphite particles are often embedded in clay, which is difficult to separate. Due to high original ore products (generally 60%-80%of carbon -containing carbon), many graphite mines directly crushed the mined ore and sell graphite powder products. The Hunan Gogee Mine established a floating chosen -chosen -chosen macroex graphite in the 1950s, but was discontinued due to the high cost. At present, some units are still conducting research on new technology (such as petroleum clustering).

3. Purification of graphite products

The requirements of the modern graphite processing industry have developed to two aspects: one is to require large crystal to achieve high purity, and the other is that graphite products are super fine (such as less than 1 μm or 0.5 μm). my country has established graphite purification and fine powder processing production lines in graphite processing plants such as Nanshu, Beishu, Liu Mao, and Xinghe. Purification methods are mainly chemical purification. The most mature process of graphite chemistry is melted with harsh alkali and graphite at 700 ° C, washed to neutrality, and then added with hydrochloric acid to treat washing, so that the carbon content of graphite reached 98%-99%. There are also manufacturers who use hydrofluoric acid to deal with high pure graphite.