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According to the working modes, the magnetic separator can be divided into the dry magnetic separator and the wet one.
Applied Material:
iron ore,magnetite, pyrrhotite, ilmenite, hematite, limonite, rare earth,manganese ore, slag, iron sand, slurry, etc.
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A magnetic drum separator, also known as a drum magnet, is a machine that uses magnetic force to separate magnetic materials from non-magnetic ones, enhancing the purity of materials and improving the quality of mineral concentrates.
Magnetic drum separators are widely used in industries such as mining and minerals, aggregates, coal, recycling, and construction materials.
Key applications include iron ore beneficiation, impurity removal from non-metallic minerals, coal processing, industrial waste recycling, and beach sand separation.
Iron ore: Magnetic drum separators are used to separate iron ores like magnetite, hematite, and limonite. Through high-intensity magnetic fields, iron ore particles are attracted, enhancing the purity of ores.
Non-metallic minerals: Magnetic separation machines can remove magnetic impurities from non-metallic minerals such as quartz sand, feldspar, and mica, thus improving product purity.
Coal processing: During coal processing, magnetic separators are used to remove iron-based impurities, enhancing the coal’s combustion efficiency.
Industrial waste recycling: In metallurgy and construction materials industries, magnetic separators recover iron and magnetic substances from waste, promoting resource reuse and reducing disposal costs.
Beach sand beneficiation: Magnetic separator machines separate magnetic minerals such as ilmenite, rutile, zircon, and garnet from heavy mineral sands, collecting high-purity magnetic concentrates.
Customer feedback:
This separation solution increased recovery rates by 10%–25% and boosted the customer's annual titanium concentrate production from 50,000 tons to 500,000 tons. The magnetic drum separators manufactured by FTM Machinery significantly improved classification efficiency, enhanced recovery rates and product quality, and optimized resource utilization.
Based on the dry or wet processing methods in mineral separation, magnetic drum separators are classified into two types: dry magnetic drum separators and wet drum magnetic separators.
Dry drum magnetic separators operate without water or liquid media, using magnetic field strength, gradient, and gravity to separate and move particles. They are especially suitable for efficient separation in dry environments.
Dry magnetic drum separators are ideal for roughing or primary ore beneficiation, commonly used to separate large, coarse particles of strongly magnetic ores and fine, weakly magnetic ores.
During operation, dry material is fed onto a rotating drum, where magnetic particles attach to the drum's surface due to the magnetic field, while non-magnetic particles fall off under gravity and mechanical force. Magnetic particles are then carried to the discharge point and released or brushed off, ensuring optimal production efficiency.
Advantages of dry magnetic drum separator:
Water-saving and environmentally friendly: Requires no water source, reducing wastewater issues, and is suitable for areas with limited water resources.
Low maintenance: With a simple structure and fewer parts, it has a low failure rate and reduced maintenance costs.
Easy to move: Compact and lightweight, making it easy to install and relocate.
Low energy consumption: Typically consumes less energy compared to wet magnetic separation.
Wet magnetic drum separators operate in the presence of water or liquid media, handling wet materials or slurries. Water is used to wash and transport the materials, allowing for better separation while they are in a wet state.
This type of magnetic separator has excellent separation selectivity and is commonly used for separating fine strongly magnetic ores and fine weakly magnetic ores, effectively increasing the recovery rate of fine and powdered materials.
Depending on the flow direction of the slurry (or material) relative to the magnetic field, wet magnetic separators can be classified into cocurrent magnetic drum separators, semi-countercurrent magnetic drum separators and countercurrent magnetic drum separators.
Advantages of wet magnetic separators:
High separation efficiency: Wet magnetic separators are usually more efficient than dry types, especially for fine, weakly magnetic, and clay-rich minerals like hematite and magnetite.
Suitable for moist materials: Wet separators can handle wet materials without needing additional drying.
High-grade concentrate: The fully magnetic design increases the contact area between slurry and working surface, allowing for extended separation and increasing concentrate grade by 2%–4%.
Low dust pollution: As wet separation takes place in water, there is no dust pollution, meeting environmental requirements.
The permanent magnet system uses high-quality ferrite or a composite of ferrite and rare earth magnets, ensuring magnetic stability under high-flow conditions and excellent separation results.
Various drum diameters are available (600 mm–1500 mm) with speeds up to 35 rotations per minute, allowing flexibility for different processing volumes and separation needs.
A wide magnetic field angle with smooth transitions increases separation area length and magnetic reversal frequency, delivering high-grade, high-recovery output.
Drum surface average magnetic induction intensity ranges from 100–600μm, with a demagnetization rate of no more than 5% over 8 years.
Adaptable to variations in feed volume, particle size, and slurry concentration, with each series of equipment usable independently or in combination.
The magnetic system is covered with non-magnetic stainless steel to prevent magnet wear, extending equipment life.
The magnetic drum separator uses a magnetic field to separate magnetic and non-magnetic materials. When material enters the separator, magnetic particles are attracted to the drum's strong magnetic field and adhere to its surface, while non-magnetic particles continue to fall along their path to a separate outlet.
As the drum rotates, magnetic particles are carried to the opposite end, where they are removed with water flow or a brush roller and collected in a designated area. This process effectively separates magnetic minerals, improving material purity and beneficiation efficiency.
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