Dust extraction in the quarry

Home Applications Dust extraction in the quarry

Dust extraction in the quarry ensures the protection of the environment by dust extraction, but mainly ensures the cleaning of individual fractions of crushed stone from dust particles. The previously used pressurized water mist is a system effective in reducing the spread of dust to the environment, but the dust associated with the water mist ends up back in the gravel. Recipients of gravel fractions today control, among other things, the amount of residual dust – filler – in the purchased gravel fraction, which increases the requirements for dry dust extraction.

In quarries, we can dedusting either by connecting the central suction pipe to the cover flanges or individual fractions of material can be dusted by blowing using a separate fan and a system of nozzles and suction nozzles. This application can be implemented with existing solutions in already established quarries. Purification of the aggregate fraction from unwanted filler takes place by installing blowing nozzles at the overflow of the resulting fraction. The main dedusting technologies in the quarry are extraction from crushers, extraction from sorters, extraction of belt conveyor overflows and extraction of filling nozzles. For the dust extraction and filtration in the quarry, we use filter units with regeneration of the filter medium using high pressure fan, so that’s not necessary to implement a source of compressed air for regeneration. The separated filler is transported by a set of screw conveyors to a filler hopper, which is equipped with a filling nozzle for dust-free dispatch of the filler to the truck.

Quarry dedusting filter

The G&G Fan BAG filter is a filtration equipment designed for dust removal from quarries and their stone crushers, sorting seeves, transporting and loading technologies, packing plants etc. where is the problem producing compressed air or where compressed air is even not possible to be produced for JET Pulse regeneration. The filter is ideal for filtering dry, non-sticky dusts. Regeneration of the filter medium is ensured by an automatically sliding troley, which is located inside on the clean side of the filter. This trolley is part of regeneration which ensures cleaning of individual rows of filter pockets, placed on top over each other vertically, side by side horizontaly. The source of regeneration counterfolw air is a high-pressure fan, which is located on the ceiling of the filtration device. Regeneration is done “online“ this means during operation of filter. When the end position is reached, the troley continues the regeneration cycle. After switching off the filter, the regeneration cycle will ending and will parking the regeneration trolley after completing of two regeneration cycles. Parking is in position outside the area of the filter elements. The filter elements are horizontally placed flat filter pockets, which are attached inside filter housing from front side and from the back side. A spring connection ensures a tight connection where the filter pocket is fitted between clean and dirty side. The filter device is equipped with a pre-separation chamber, which ensures distribution of the air flow inside the filter unit with a ratio of 60% upperstream/40% downstream. 60% of the intake air is supplied to the filter housing at the top of the filter and 40% of the air to the bottom of the filter. At the same time, dusty particles are directly separated in the pre-separation chamber, from which are falling freely into the hopper and do not come into contact with the filter elements. The advantage of flat filter pockets is the great ratio of filter area versus filter box size.

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If you are preparing the implementation or reconstruction of filler filtration in a quarry, we offer you cooperation in the design, production, and implementation of the exhaust technology. We will be glad if you contact us.

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