BLT SA’s Samson travelling Eco-Hoppers have an effective dust control system that minimises the escape of dust during the grab discharge cycle in bulk materials handling.

“Environmental pollution, caused by fugitive dust, is a major problem in dry bulk handling,” states Charity Gumede, marketing director, BLT SA. “Eco-Hoppers are designed to suit the characteristics and flow properties of virtually any bulk material, including coal, iron ore, gypsum, copper concentrates, soda ash and wood chips.

“These robust grab unloading hoppers, which are manufactured to withstand tough conditions in bulk handling, offer handling rates to 5 000 tonnes per hour, depending on grab crane performance. This low maintenance system also reduces investment and operating costs.”


Eco-Hoppers have an upper and lower section, separated by a dust retention feature, the ‘Flex-Flap’. This divider, which comprises a series of pressed steel sections and vertical rubber flaps, opens to allow the free flow of material into the hopper and closes to prevent the flow of air out of the hopper.

When bulk material is released by the grab, it falls through the Flex-Flap and accumulates in the inner hopper below. The hopper system automatically closes as a result of the newly created pressure differential between the hopper and the atmosphere, forming a seal to contain the dust contaminated air. Integral reverse jet filters are positioned around the hopper inlet to extract and clean the dust laden air. Collected dust is then re-cycled into the mainstream of material.

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