Graphite Ore Processing
Graphite Ore Beneficiation Methods
Graphite ore beneficiation includes gravity separation, flotation, magnetic separation and electric separation. It is widely used for separating natural graphite, flake graphite, crystalline graphite, graphite in granite, etc.
According to the specific composition and properties of the ore, Sortek Group combines multiple methods for comprehensive processing to achieve the best separation effect.
Graphite Beneficiation Process
Graphite ore beneficiation refers to separating valuable minerals from raw graphite ore to obtain products with higher purity and better suitability for specific purposes. Usually, multiple beneficiation methods are combined to produce graphite products with higher grade and purity.
1. Hand Selection: The raw ore grade of aphanitic graphite is generally high, with a carbon content of 60-80%. The final product can be obtained after hand selection, crushing and grinding.
2. Gravity Separation: The symbiotic minerals of graphite ore mainly include pyrite, pyrrhotite and limonite, followed by zircon, leucoxene, monazite, scheelite, diopside, and occasionally apatite. Heavy minerals are separated by gravity separation, which is often combined with flotation to obtain rough concentrate dominated by graphite.
3. Flotation Separation: The grade of flotation graphite concentrate can usually reach 80% to 90%, and its purity can reach about 98% through multi-stage grinding and separation. This method can effectively protect graphite flakes and improve graphite grade.
4. Magnetic Separation: It is suitable for separating magnetic minerals from graphite ore.
5. Electric Separation: Graphite ore has good conductivity, while gangue minerals (such as feldspar, quartz, pyrite, etc.) have poor conductivity. Based on this difference, separation can be achieved by electric separation.
Graphite Processing Plant (Graphite Flotation Process Plant)
The general graphite ore processing flow includes crushing – screening – grinding – flotation – dehydration – drying.
1. Preparatory Process (Crushing, Screening and Grinding)
Graphite ore generally has medium-hard or soft hardness, and its grade is usually between 2% and 10%. Therefore, it usually adopts a three-stage open-circuit, two-stage open-circuit or one-stage crushing process. This ensures that graphite flakes are not damaged and the concentrate quality meets requirements.
2. Flotation Process (Roughing, Scavenging and Concentrating)
Due to the high value of graphite, the three-stage flotation machine process can realize more efficient extraction of graphite particles from raw ore. It gradually improves the grade and purity of graphite concentrate while increasing production capacity and economic benefits.
3. Concentrate Treatment (Dehydration, Drying, Screening and Packaging)
Dewatering screens, filter presses or rotary dryers are commonly used equipment for dehydrating graphite ore concentrates.