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Graphite Ore Mining


Production Line

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.

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Process Description

Introduction: 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.

Application: Graphite mining processes are mainly applied in the various graphite ore with different types of crystalline and graphite ore accompanied with silicate minerals, such as mica and pyrite.

  • Multi-stage Grinding and Multi-stage Flotation

  • To protect the graphite flakes from crushing, Shunzhi 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, Shunzhi gravity separation - flotation combined technology flow can be used. The heavy minerals are separated through gravity separation, and the tailings are dealt with flotation.

  • Graphite Processing Equipment

  • Coarse crushing equipment for crystalline and amorphous graphite is the common jaw crusher. The middling and fine crushing equipment is a common cone crusher or hammer crusher. The grinding equipment uses the wet ball mill and the grid ball mill. The flotation equipment for graphite is the common JJF flotation cell, XCF flotation cell, and XJB flotation cell. The dewatering equipment of graphite is the common hydrocyclone or belt filter.

  • Flotation Reagent

  • In the multi-stage flotation process, the common foaming agents are No.2 oil, No.4 oil, ether alcohol, Rourke oil, etc; The collectors are kerosene, diesel, heavy oil, sulfonate, sulfate, phenols, carboxylic acids, etc.

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Processing Flow

  • Mining: Crystalline graphite ore is mostly mined by open-pit method, and cryptocrystalline graphite ore can be mined by open-pit or underground method.

  • Crushing and Grinding: After crushing graphite ore, grind it with ball mills or Raymond mills, and control the grinding particle size according to the size of graphite flakes.

  • Flotation: Add collectors such as kerosene and diesel oil and frothers to the pulp, and obtain graphite rough concentrate by flotation; crystalline graphite needs to protect flakes and adopt multi-stage grinding and multi-stage flotation.

  • Cleaning: Conduct multiple cleanings on graphite rough concentrate to remove impurities such as silicates and increase the fixed carbon content of graphite.

  • Dewatering: Dewater graphite concentrate with thickeners and filters to obtain graphite concentrate filter cake.

  • Drying and Classification: After drying the filter cake, screen graphite finished products of different grades and particle sizes through classification equipment.

  • Purification (Optional): For high-purity graphite demand, adopt chemical purification (acid leaching) or high-temperature purification to further increase the fixed carbon content.

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