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{"title":"Belt Permanent Magnetic Separator for Metal Contamination Removal","imgUrl":"https:\/\/img.chinax.com\/nimg\/f4\/82\/ca008722757563893bd2695eb980-200x200-1\/belt_permanent_magnetic_separator_for_metal_contamination_removal.jpg","attrs":{"Model NO.":"S99","Structure":"Belt Conveyor","Material":"Carbon Steel","Material Feature":"Oil Resistant, Heat Resistant, Fire Resistant"}}
he Twin-Roller Sand Aerating Machine is a key pre-treatment unit in foundry sand handling systems. It is primarily used to efficiently loosen and preliminarily crush compacted or caked spent sand delivered from shakeouts, conveyor belts, or sand hoppers. It restores inter-granular permeability, prevents blockages and wear in downstream equipment (e.g., elevators, coolers, mixers), and ensures continuous, stable operation of the sand system.
Featuring a dual-symmetric roller counter-rotation design, the machine uses cutting, compression, and tearing actions between roller teeth and sand lumps to achieve uniform sand aeration. Capacity ranges from 20–100 t/h, compatible with various sand systems including clay-bonded sand, sodium silicate sand, and resin-bonded sand—widely used in medium-to-large foundries for automotive, rail, pipe casting, and heavy machinery.
Working Principle
Feeding: Compacted spent sand enters the machine chamber via the top inlet.
Aeration & Crushing: Two rollers equipped with high-strength wear-resistant tooth plates rotate towards each other at low speed. Sand lumps are progressively torn and broken apart by shear and compression forces, forming a loose, permeable sand flow.
Discharge: Loosened sand is evenly discharged through the bottom outlet into downstream conveyors or cooling equipment.
Overload Protection: Equipped with hydraulic or mechanical safety coupling—if foreign objects (e.g., casting scraps, bolts) enter, the rollers automatically stop or slip, protecting the drive system.
Key Features
High-Efficiency Aeration, Restores Sand Properties Differential speed design enhances shearing effect, breaking compacted lumps into ≤50 mm particles—significantly improving sand flowability and permeability, preparing for cooling and reclamation.
Wear-Resistant & Durable Roller teeth made of high-chrome cast iron (Cr26–Cr28) or alloy steel with overlay welding, surface hardness HRC≥58—excellent wear resistance. Roller shafts are quenched and tempered for high strength, service life up to 12,000–15,000 hours.
Compact Structure, Stable Operation Welded steel frame with high rigidity. Drive system uses hardened gear reducer + gear coupling—high efficiency, low vibration, low noise (≤80 dB(A)).
Easy Maintenance & Inspection Equipped with side access doors or top inspection hatches for quick tooth replacement or chamber cleaning. Some models feature hydraulic lifting rollers for major maintenance.
Intelligent Control, Safe & Reliable Optional PLC control + current monitoring—real-time motor load tracking, automatic alarm and shutdown on overload, supports remote start/stop and fault diagnosis.
High Adaptability, Flexible Configuration Customizable roller diameter (Φ400–Φ800 mm), length (800–2000 mm), and motor power (7.5–30 kW) based on sand temperature (ambient/high-temp), capacity, and installation space.
Main Technical Specifications
Model
SL-20
SL-40
SL-60
SL-80
Capacity (t/h)
20
40
60
80
Suitable Sand Types
Clay, Resin, Silicate Sand
Clay, Resin, Silicate Sand
Clay, Resin, Silicate Sand
Clay, Resin, Silicate Sand
Max Inlet Lump Size (mm)
≤150
≤150
≤150
≤150
Outlet Particle Size (mm)
≤50
≤50
≤50
≤50
Roller Diameter (mm)
Φ500
Φ600
Φ700
Φ800
Roller Length (mm)
800
1200
1500
1800
Motor Power (kW)
11
18.5
22
30
Roller Speed (r/min)
25–35
25–35
25–35
25–35
Weight (kg)
2,800
4,200
5,600
7,500
Overload Protection
Mechanical Safety Coupling
Hydraulic Option Available
Hydraulic Safety Coupling
Hydraulic Safety Coupling
Typical Applications
Clay Sand Lines: Loosening spent sand after shakeout, preventing elevator blockage
Resin Sand Reclamation: Breaking lumps to improve reclamation efficiency
Pre-cooling Treatment: Enhances cooling tower heat transfer, reduces drift loss
Sand Bin Outlet Aeration: Prevents bridging, ensures smooth discharge
Spent Sand Reuse System: Restores flowability for uniform mixing
Company Profile
Qingdao Dingli Machinery Co., Ltd.
Qingdao Dingli Machinery Co., Ltd. is a company specializing in the production of casting machinery equipment. It mainly manufactures equipment for casting clay sand, resin sand, coated sand, wet sand drying, lost foam casting, sodium silicate sand, etc. It can undertake various turnkey projects, including the design, manufacturing, installation and commissioning of mechanical sand processing. Our factory has strong technical strength and advanced processing equipment. We have long-term and close technical cooperation with many senior experts and scholars from domestic universities and research institutions. We can provide users with high-performance, reliable products and satisfactory services. Our company adheres to the principles of promoting enterprise development through technology, prioritizing quality, continuous improvement and customer satisfaction. We are willing to sincerely cooperate with friends from all walks of life to achieve common prosperity. Our company mainly undertakes the following projects: 20-180t/h mechanized clay sand processing production line and single machine equipment turnkey project. Annual production of 1000 to 20,000 tons of consolidated resin sand casting mechanized production line and single machine equipment turnkey project. Annual production of 3,000 to 10,000 tons of hot processing coated sand complete equipment and single machine equipment turnkey project. Annual production of 3,000 to 7,000 tons of hot coating sand regeneration complete equipment and single machine equipment turnkey project. 5-15t/h sodium silicate mechanical production line and single machine equipment turnkey project. 5-30t/h three-stage sand drying equipment and single machine equipment turnkey project. 5-40t/h lost foam casting complete equipment and single machine equipment turnkey project and other types of shot blasting cleaning equipment, lifting equipment, conveying equipment, cooling equipment, magnetic separation equipment, environmental protection dust removal equipment. Welcome to contact us~
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2013
Ecer Certification：
Verified Supplier
Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati... Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati...
