How to Correctly Select Permanent Magnetic Iron Separators如何正确选择永磁除铁器

一、（Clarify Core Material Parameters）

• Material Type: For different materials such as coal, ore, fly ash, cement, and grain, select the appropriate type of iron separator (e.g., suspended type is preferred for coal transportation, and pipeline type for powder pipeline transportation).
• Iron Impurity Content and Particle Size: When the iron impurity content is high (>1%) or the particle size is large (>5mm), select models with high magnetic field strength (≥12000Gs) and large adsorption area; for fine iron impurities (<1mm), high-precision permanent magnetic iron separators are required to ensure adsorption efficiency.
• Material Humidity and Viscosity: For high-humidity and high-viscosity materials (such as wet coal and sludge), select iron separators with anti-clogging design and matching automatic iron cleaning devices to avoid iron impurity adhesion affecting iron removal effect.

2. Processing Capacity: Select the corresponding specification of iron separator according to the hourly material conveying capacity (t/h) to ensure that the equipment processing capacity matches the production line and avoid incomplete iron removal due to overload.

• Conveying Speed: When the belt conveying speed is fast (>1.5m/s), select iron separators with strong magnetic field penetration and fast adsorption response to prevent iron impurities from separating from the magnetic field due to inertia.

二、（Adapt to Usage Scenarios and Installation Conditions）

1. （Installation Location and Form）

• Above Belt Conveyors: Select suspended permanent magnetic iron separators (divided into top suspension and side suspension). Confirm the installation height (generally 1.5-2 times the material thickness) to ensure the magnetic field covers the entire conveyor belt width.
• Silo/Hopper Inlet: Choose pipeline-type or plate-type permanent magnetic iron separators, which are compact in structure, suitable for installation in narrow spaces, and prevent iron impurities from entering subsequent equipment.
• Roller Conveyor Systems: Match with permanent magnetic roller iron separators, integrated into the conveying rollers to realize iron removal while conveying, saving installation space.

2. （Environmental Working Conditions）

• Temperature Environment: Conventional permanent magnetic iron separators are suitable for temperatures ≤80℃. For high-temperature working conditions (such as boiler flues and high-temperature material transportation), select high-temperature resistant permanent magnetic materials (such as samarium-cobalt permanent magnets) with an adaptive temperature of up to 200-300℃.
• Dust/Corrosion Environment: For dusty, humid or corrosive environments (such as chemical industry and coastal operations), select iron separators with sealed shells and stainless steel materials to enhance protection performance.

三、Focus on Core Performance Parameters）

1. （Magnetic Field Strength and Penetration）

• Magnetic Field Strength: Core indicator. Conventional models have a magnetic field strength of 8000-15000Gs, which should be selected according to iron impurity characteristics and material thickness (≥12000Gs for thick material layers).
• Magnetic Field Gradient: High-quality permanent magnetic iron separators have a large magnetic field gradient, concentrated adsorption force, which can quickly capture fine iron impurities and avoid falling off after adsorption.

2. （Iron Cleaning Method

• Manual Iron Cleaning: Suitable for small equipment, intermittent production or scenarios with low iron impurity content, low cost but requiring shutdown operation, affecting efficiency.
• Automatic Iron Cleaning: Including scraper type, belt type, and rotary type iron cleaning. No shutdown is required, enabling continuous operation. Suitable for large production lines and working conditions with high iron impurity content, priority recommended for selection.

3. （Structure and Durability）

• Magnetic System Protection: Select models with well-sealed magnetic systems to prevent materials from wearing the magnet surface and extend service life.
• Shell Material: Prefer Q235 steel plate or stainless steel welded shell with high mechanical strength and impact resistance, adapting to harsh industrial environments.
• Installation Stability: Reasonable frame design with anti-seismic and anti-loosening structures to ensure stable operation of the equipment under high-frequency vibration conditions.

四、（Comply with Industry Standards and Special Requirements）

1. Explosion-Proof Requirements: For flammable and explosive environments such as coal mines and chemical industry, select explosion-proof permanent magnetic iron separators that meet GB3836 series explosion-proof standards.

• Environmental Protection Requirements: Select models with no magnetic leakage and low noise to meet industrial environmental protection emission requirements.

2. （Customization Requirements）

• Special Sizes: Customize non-standard size iron separators according to equipment installation space, conveyor belt width, etc.
• Special Working Conditions: For special working conditions such as strong corrosion, ultra-high temperature, and high altitude, require suppliers to provide customized solutions (such as using special permanent magnetic materials and strengthening sealing protection).

（Summary）