Coarse Material Washers

Eagle Iron Works produces heavy-duty Coarse Material Washers for removing soluble clays and dust coatings that are encountered in natural and crushed stone applications. They are manufactured with alternating spiral flights and paddles on the conveyor shaft to abrade and break down soluble clays or crusher dust clinging to the particles in the feed. Undesirable dissolved clays and silts overflow the weirs from a rising current of water to remove lightweight deleterious materials. Removing these deleterious materials is vital to creating a clean final product.

Coarse Material Washers from Eagle Iron Works are available in either single or double screw configurations depending on capacity requirements. The largest size machine is a 48” x 24’ Double Screw unit that has a capacity of up to 500-600 tph. They are available with Eagle’s heavy-duty gear reducer or as a CONDOR model with standard Dodge reducers. An adjustable end weir improves trash removal capabilities. Heavy-duty cast hubs protect the pipe shafts from excessive wear.

Corrugated paddles cut through a slurry of rock and water, resulting in particle-on-particle scrubbing that causes the deleterious materials to separate from the coarse aggregate materials. The action of the paddles, combined with the rolling and tumbling generated by the rotating spirals, releases deleterious materials into the overflowing wastewater. A rising current manifold on each Eagle Coarse Material Washer provides an upward current of water to assist in removing unwanted materials. Lightweight deleterious materials, such as twigs, sticks and some coals, are floated by the rising current of water and the jigging action of the paddles within the tub. Those lightweight materials are then removed by the overflowing wastewater.

By adding more paddles to the shaft(s), each Coarse Material Washer can be configured to meet the different specific scrubbing needs of various materials. Additional paddles, while slightly reducing capacity, allow material to be retained in the Coarse Material Washer’s tub area, providing additional scrubbing.