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Industry Served , Coal and Ore Mining


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Coal and Ore Mining

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Virto/Elcan Developed Equipment that Includes a Multi-frequency Vibratory Filter for the Classification of Coal Suspension

The processing of coal and ores often requires the process of flotation and washing. These procedures result in the discharge of enormous volumes of tailings and slurries into tailings ponds. The tailings create an ecological threat. Authorities around the world are encouraging companies to reduce or avoid tailings by optimizing their processes. Under existing technologies, it is almost impossible to turn these tailings into a commercial product.

The Virto/Elcan Solution

A wet stream of refused coal is sent to sedimentation ponds. This refused coal is defined by high ash content between 50%-100%. Inside the wet stream, fractions which are over a certain size have low ash content between 15% - 40%. Generally, the solid content in these streams ranges from 5% - 30%. Traditionally, it has been impossible or non-economical to separate these fractions using conventional separation equipment.

Virto/Elcan developed equipment that includes a Multi-frequency Vibratory Filter for the classification of coal suspension according to the solids’ sizes and densities. Virto/Elcan also developed a self-cleaning screening machine for the dewatering of the end product.

In an ore processing plant, the goal is to increase the concentration of the mined ore. This goal is achieved by grading the ore down to a very fine powder, usually in a slurry form. Throughout the size reduction process, that is based on primary and secondary crushing prior to milling, the ore is being separated mainly by screens, heavy medium vessels, hydro-cyclone, floatation column and spiral classifier. Slurry with 30-65% solids content is separated at cut-points from 25mm down to 50 microns. Often, due to the tackiness and viscosity of the slurry, the separation efficiency becomes poor.

Virto/Elcan developed multi-frequency vibratory screeners intended for closed crushing circuits. These screeners make it possible to decrease the coarseness of crushed ore from 20 – 25 mm to the preferred size of 8 – 10mm. In the ore prep-plant, crushed ore slurry with approximately 30 – 65 % of solids must be separated from 1.5 mm down to 50 microns. Due to material characteristics, the primary choice is to avoid conventional screens and to use spiral classifiers, floatation and hydrocyclone. These lead to inefficient processes, resulting in over-grinding of quality minerals, reduction in process effectiveness, decrease in quality of product and increase in energy consumption.

In order to target this specific industry issue, Virto/Elcan developed a multi-module vibratory screener, which consists of several independent working modules. Each module is a multi-frequency screener, whose vibration system makes it possible to effectively separate fine and ultrafine particulate materials. These vibratory screeners are equipped with the original multiphase sieves, which ensure high productivity and effectiveness of screening to reach over 90% screening efficiency thus boosting productivity.

 Contract Manufacturing 


Contract Manufacturing 1

Contract Manufacturing

 Screeners Utilized 


ScreenX RS Series Single Deck Rectangular Vibrating Screeners

ScreenX RS Series Single Deck Rectangular Vibrating Screeners

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