Zhengzhou Hengyang Industrial Co., Ltd
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The graphite mining processes are mainly the gravity separation process, froth flotation process, electric separation process, and the combination process. And froth flotation process is the main graphite ore processing method. Generally, 90%-97% grade of graphite concentrate can be obtained after the graphite flotation process. For the different graphite ore properties, the graphite mining processes are also different.
Graphite ore include amorphous graphite and flaky graphite. Amorphous graphite also call cryptocrystalline graphite.
Multi-stage Grinding and Multi-stage Flotation
To protect the graphite flakes from crushing, Hengyang uses a multi-stage grinding flow. Through re-grinding and re-processing, the quality of concentrates is qualified.
Gravity Separation - Flotation Combined Technology Flow
For graphite ores with heavy minerals, Hengyang gravity separation - flotation combined technology flow can be used. The heavy minerals are separated through gravity separation, and the tailings are dealt with flotation.
| Mineral Processing Method | Flotation | Gravity Separation | Electrostatic Separation |
| Principle | Graphite has natural floatability | Density difference exists between minerals | Graphite has good electrical conductivity |
| Gangue Minerals Removed | Silicate minerals such as clay, quartz, mica, feldspar, etc. | Minerals with higher specific gravity such as pyrite, garnet, rutile, tremolite, etc. | Minerals with poor conductivity such as quartz, feldspar, mica, etc. |
| Application Environment | Graphite ore cleaning | Graphite preprocessing (combined with flotation) | Graphite ore roughing |
1. Crushing stage: Both crystalline and cryptocrystalline graphite ore can be roughly crushed by jaw crusher. Cone crusher and hammer crusher can be used for medium and fine crushing of graphite.
2. Grinding stage: graphite grinding equipment can choose ball mill
3. Selection stage: mainly for flotation operations, JJF type, XCF type and other flotation machines can be selected.
4. Dehydration stage: Diaphragm filter press, centrifugal dehydrator and dryer can all be used for dehydration of graphite ore.
5. Classification stage: When classifying graphite products, high square sieves are mostly used, and plane vibrating sieves and gyratory sieves are used in a few. Among them, the high square screen is a special screening equipment for the classification of graphite products in mineral processing.