Filter Bags
in the Cement, Gypsum and Lime Industry

Product quality and compliance with dust emission limits is a core requirement for dedusting in the cement, gypsum and lime industry. The choice of filter media is of paramount importance in cement kilns where there are high NOx levels due to high combustion temperatures. The needlona®-filter media range offers for each process in the cement, gypsum and lime industry technically sophisticated solutions.

Typical Operating Conditions:

Cont. Temperature (°C): 68-482°F
Peak Temperature: (°C): Orientation to the maximum peak temperature of the fibre polymers used
Dust: Cement, clinker, coal, gypsum, lime, raw meal 
Dust Properties: Agglomerating, abrasive, explosive
Dust Source: Blast furnace, chlorine bypass, clinker cooler, coal grinding, mill, rotary kiln, spray dryer, silo, transfer stations 
Harmful Gases: H2O, NOx, SOx, HCl
Cleaning Process:           Pulse jet, reverse air
Fuels: Natural gas, coal, oil, secondary fuels

Specific Requirements for Filter Media in the Cement, Gypsum and Lime Industry:

  • High abrasion resistance 
  • Discharge of electrostatic charges 
  • High chemical resistance 

Scrim and Fibre Types for Filter Media in the Cement, Gypsum and Lime Industry:

A complete range of filter media is available for the dedusting of the various production processes in the cement industry. The needlona®-filter media are characterised by the compact structure and the supporting scrim used. They are thus particularly well suited for the filtration of high dust loads in the cement industry.

For dedusting of cement mills, particularly during addition of grinding aids, our high separating-power MPS® filter media made of fine fibers enhance quality and productivity.

 

For the dissipation of electric charges in coal grinding, we recommend our ExCharge® filter media. These are certified by DEKRA EXAM and safely dissipate electrostatic charges

PM-Tec filter media made of fiberglass fabric with a laminated ePTFE membrane are particularly suitable for fine dust filtration. The ePTFE membrane already retains minute dust particles on the surface, while the glass fiber fabric underneath represents an economical compromise between price and service life.