SPECIALIST EQUIPMENT
A holistic view of dust control Martin Engineering representatives visited the site with a trailer containing a fully functional Martin Dust Control Unit (DCU), allowing a full demonstration of the unit’s capabilities. Conducting an end-to- end walkthrough of the cargo fl ow, technicians were able to determine the best course of action. “After inspection, we devised a plan that optimised the dust control at both locations, while using as much common equipment as possible,” explains Brian Nance, product engineer at Martin Engineering. “Our DCU is designed to independently control dust at several application points, thus allowing for the use of much of the same technology, while employing a diff erent strategy for each of the two emission areas. “Using the same additive, we were able to off er treated water suppression close to the hopper’s point of emission and then also apply the chemical at the transfer point between Conveyor 0 and Conveyor 1 to mitigate emissions all the way up to the stockpile discharge point.” Constructed over two days and scheduled to coincide with mine downtime, three technicians installed the DCU at a location with water and electrical power. A six-nozzle cradle-mount system was installed to provide serviceability at the Conveyor 1 discharge, and a manifold system was placed to address the issues at the dump pocket. Material monitoring sensors were employed at both locations to ensure application only when needed. T e pumps in the DCU are powered
by variable frequency drive (VFD), allowing independent control over the fl ow of water and chemicals for each pump. Water application is monitored, and the Martin MEL-101 chemical binder additive is dosed at the proper ratio to suit the operating conditions.
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Failsafe mechanisms are incorporated to shut the unit down and close valves to protect pumps and other equipment from line blockages or breaks. T e entire system is integrated, so that it can be monitored remotely from the plant’s central control room. Using additives, limestone dust
particles are able to agglomerate with each other, increasing in size and weight and making them less likely to become airborne, thus preventing fugitive emissions. With
Above: With Conveyor 0 running in the background, the air is clear and the work area is compliant
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