Large volumes of hard and abrasive dust particles are typical in most mining and mineral processing related applications. This dust type rapidly wears out filter media, leading to frequent maintenance or worse: filter leaks. Without effective dust emission control, equipment, process, employees and the environment may be at risk and production could be halted.
Cement manufacturing offers particularly difficult challenges to dust collectors. Based on data from installations, it's been estimated that as much as 1% of mining throughput can be lost to the surrounding environment. For a 700 TPH quarry, that's about seven tons per hour lost from conveyors, crushers and screens, and that does not include losses from stockpiles.
As your single filtration source for mining and minerals, Donaldson helps you navigate the complex world of dust collection specifically for the cement industry in the most efficient and environmentally-friendly way.
The following is a list of some of the typical areas at mines and quarries generating dust that can be controlled by dust collection equipment:
Years of experience in mining and quarry dust control has highlighted a number of significant points:
Anything marginal in either design or selection results in immediate or short term inadequacies in collector performance. The difference in selections between an effective and ineffective dust collector is often much narrower than in many other industries.
The most obvious dust generation points may seem to be conveyor transfer points and feed points from screens and crushers. But often, oversized feed-outs from screens or transfer of large product into bins will generate significant dust.
Budgetary constraints are important, so it is generally better to do some parts right than a lot of parts wrong.
Two basic strategies exist for applying dust control to mines and quarries; source collection (putting the dust collector at the source of the dust emission so collected dust can be deposited directly back into the process stream) or centralized collection (putting the collector in a central location where dusty air is ducted to the collector and discharged as a separate process stream).
The following points need to be considered in the selection of central dust collectors for mining and quarrying applications:
Source collection systems may be easier to deal with since hoppers and ducting are often not used. But when using source collection, the following should be considered:
Model | Product Family | Use | |
---|---|---|---|
|
RFs (Four 376RFW10 Units & One 484RFW12 Unit) | Baghouse Dust Collector | Limestone Crushing |
|
81MBT8(s) | Baghouse Dust Collector | Bin Venting Diatomaceous Earth |
|
Dalamatic Insertable 20/10 | Baghouse Dust Collector | Coal Conveyor Transfer Point |
|
PowerCore CPC 3 | PowerCore Dust Collector | Cement |
|
DLMC 4/8/15 | Baghouse Dust Collector | Rock Crushing |