HHH Nomex Airslide Fabrics( Aramid airslides)
The Nomex Airslide belt is not only known for using special fabrics for Air slide belts used in pneumatic conveyor lines but also for introducing the Air slide for aeration and handling of powered materials in silos, hoppers and stacks which are used in cement works, lime factories, chemical plants and mining operations. The Air slides are available in rolls of 40mm or 50mm and heights up to 1400mm. They are made of either cotton, polyester, aramidic fibers. The multi-ply structure of fabrics, with different weights, thickness and permeability allows : Uniformity in the flow effect on the slide surface Great mechanical resistance to abrasion and tensile strength, a vast porosity range. The materials can be supplied cut to pattern upon request.
Providing for continuous discharge of materials
from silos and tanks by means of
properly designed equipment is very important.
Continuous flow with required
efficiency is needed for concurring technological
equipment and properly chosen
aeration device will moreover provide for
proper emptying of a storage facility and
will considerably reduce material residues
left in it.
With insufficient material aeration in its
entire volume, material doming occurs
with higher discharge outputs. Breakdown
of the dome may induce a piston
effect when a column of the non-aerated
material sinks in through the entire height
of the silo and causes abrupt decrease of
the pressure above the material level. This
may lead up to the destruction of the silo
(Fig. 6) despite its securing by using a release
device which cannot provide for
sucking of sufficient amount of air in the
silo to equalize the pressures.
Both the local aeration systems (spears
and nozzles) and the aeration devices find
their utilization in the storage technology.
Local systems are suitable for smaller
tanks with fast material turnover. Surface
aeration devices are suitable for larger
storage and dispatching silos and when
perfect emptying of a storage facility is
required. These have the additional benefit
of longer service life and resistance to
wearing by the transported material.