FINE MATERIAL WASHERS

Silt, plastic-soluble clays, unwanted coatings and deleterious materials are the main threats for aggregate production processes. In order to, meet final specs of aggregate operations and reach to needed cleanliness, various types of washing systems have been developed throughout the mining and quarry history.

These washing systems have been classified with respect to the feeding material size, dewatering capabilities, capacities, washing and classification abilities. Here in this article, all the washing systems that denoting below are going to be explained.

1- Fine Material Washer
2- Bucket Wheel
3- Coarse Material Washer and Blade Mill
4- Log Washer

1- Fine Material Washers (Sand Screw)

Fine material washers, also frequently named dewatering screws are utilized to clean and dewater fine aggregates typically minus 10 mm or 5 mm (3/8’’ or 4mesh) to fine tune end products to meet specifications and to separate water soluble clay, silt, and micro sized fine particles.

This is accomplished by hydraulic separation; using water to clean and classify by weight. Larger particles (Sand) weigh more so they sink and are collected in the bottom of the trough. They are discharged by steel spiral shaft with replaceable polyurethane or cast steel linings. The smaller lighter unwanted particles are floated to the surface and discharged over the weirs at the lower end of the machine.

Fine material washers deliver extreme productivity via capability of producing high capacities. High efficiency single or dual drives result in low power requirement, thus reducing operating costs while increasing throughput. A large capacity pool and adjustable speed control via sheave changes ensures a steady and consistent flow of fine aggregate products.

Available in both single and twin screw configurations, fine material washers are most often used after a wet screening operation to process products such as concrete, mason, mortar.