NFMSALES@nfm-filter.com 800-336-7300

ROCK INDUSTRY

Solutions that meet strict industry regulations.

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ASPHALT / HOTMIX

The asphalt manufacturing process consists of drying and heating aggregate (crushed rock, gravel, reclaimed asphalt pavement or sand) and filler (dust, fly-ash, lime or baghouse fines) and combining them with approximately 5% by weight of heated bitumen.

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CEMENT

Cement consists of very hard and abrasive dust particles. Being very abrasive, this dust type rapidly wears out filter bags. To ensure the filters do not fail, frequent filter bag replacement is needed.

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GYPSUM

Before being heated to reduce the moisture content, the process of calcination of gypsum starts with quarrying raw gypsum and then size reduction of the rock through various methods which all cause dust.

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KAOLIN

The fine particles of kaolin are transported to collecting chambers and the coarse particles are fed back into a pulverizer.

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LIME

National Filter Media has demonstrated success supplying and installing various types of baghouse filtration solutions and service for various parts of lime plant.

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MINERALS

The mining industry has strict EPA regulations to meet, as well as the concerns about protecting employees from potentially hazardous dust. Involving extraction, conveying, grinding, processing, sizing and packaging, these processes generate particulate [dust] that must be controlled.