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Product Introduction
Our Double Roller Crusher for Mineral Beneficiation is a high-precision, heavy-duty crushing unit specifically designed for fine and intermediate crushing stages within mineral processing circuits. In ore beneficiation (the process of separating valuable minerals from waste rock), over-crushing can lead to excessive "slimes"—fine powder that is incredibly difficult to recover during downstream flotation or gravity separation. This twin roll crusher resolves that challenge by providing highly controlled, compressive crushing for metallic and non-metallic ores such as iron ore, copper, gold, manganese, limestone, and quartz. It ensures optimal liberation size while preserving the structural integrity of mineral grains.
Technical Performance
Target Materials: High-hardness and medium-hardness ores, including iron, copper, lead-zinc, gold, quartz, potash, and industrial salts.
Production Capacity: From 5 to over 150 tons per hour, depending on the roll diameter and specific mineral density.
Feed Size Range: Accepts pre-crushed mineral ores typically ranging from 25mm to 75mm.
Ultra-Fine Discharge Control: The mechanical or hydraulic roll gap adjusts easily to yield highly uniform final particles from 0.5mm to 10mm.
Zero-Clogging Design: Excellent processing capabilities for damp or clay-rich ores that typically cause massive clogs in cone or jaw crushers.
Working Principle
The equipment uses a direct-pressure compression method between two synchronized rollers to break down ore along its natural mineral grain boundaries:
Chamber Gravity Feeding: Coarsely crushed ore is fed uniformly across the width of the rollers into the upper intake hopper.
Synchronous Compression: Dual heavy-duty electric motors drive the high-mass rollers to rotate toward each other. The ore is grabbed by the moving surfaces and drawn down into the narrowing gap.
Controlled Fissure Cracking: The immense compressive force fractures the rock precisely down to the thickness of the setting gap. Because the material passes through the gap only once, it eliminates the repeated impact grinding that creates useless mineral dust.
Hydraulic Tramp Iron Release: If an uncrushable material like a broken excavator tooth or drill bit enters the chamber, the hydraulic cylinders instantly compress, allowing the movable roller to back away. The foreign object passes safely into the discharge chute, and the system automatically resets to its precise beneficiation gap sizing within seconds.
Key Features & Advantages
Minimizes Slimes (Optimized Ore Recovery): By relying strictly on compression rather than high-speed impacts, it drastically reduces over-crushing. This preserves particle sizes within the ideal window for froth flotation or magnetic separation, increasing overall mineral recovery rates.
Premium Manganese Roller Shells: The rollers are outfitted with thick, replaceable shells cast from high-manganese steel alloys ($ZGMn13Cr2$). These shells continuously work-harden under the constant impact of crushing hard ores, extending their service life.
Precise Particle Gradation: The dual-point adjustable gap mechanism guarantees a highly uniform cubical product with minimal fines, providing a perfect feed for ball mills or rod mills to boost grinding circuit efficiency.
Low Operational Power Consumption: The low-RPM, high-inertia flywheel design translates to significantly lower energy usage per ton of processed ore compared to high-speed impactors or fine cone crushers.
Simplified Maintenance Profile: Built as a rugged, low-profile mechanical unit with easily accessible grease points and bolt-on liners, ensuring that routine wear-and-tear parts can be replaced quickly on-site with minimal plant downtime.
Applications: Perfectly integrated into primary crushing stages for small-to-medium mills, secondary fine-crushing loops for hard iron or gold ores, and preparation stages for diamond or industrial mineral liberation lines.
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