MANUFACTURING AND EQUIPMENT
A ROTARY FINE FILTER FOR HIGH-EFFICIENT DRY DUST COLLECTING
IN THE PRODUCTION OF REFRACTORIES
S. V. Éntin,
N. M. Anzheurov,
S. Yu. Panov,
Yu. V. Krasovitskii,
and L. I. Shcheglova
Translated from Novye Ogneupory, No. 5, pp. 84 – 86, May, 2003.
A fine filter for treatment of dust-laden gases in the production of refractories is developed. Its testing in a pilot
filtering unit using a model quartz dust has shown a high-efficient on-line recovery of 75 – 85%. The aerody
namics of the filter equipped with rotary impellers is discussed. The engineering solution proposed expands
the application of fine filters and allows the treatment of dust-laden gases to be carried out without preliminary
separation of large-sized particles using other facilities.
Filtering of aerosols through porous cross-linked beds
(such as metallic filter grids, ceramic and metal-ceramic
membranes) has two major inconveniences: it requires a high
pressure drop, and the filtering facilities employed are diffi-
cult to recover . A way of improving operation of the filter
bed is to collect the coagulating dust with a low pore depth
penetration and to remove it. Furthermore, the recovery tech-
nique should allow some dust to be retained on the bed sur
face to ensure efficiency of the new filtering cycle.
It has been noted earlier [2, 3] that rotary cylindrical or
conical filter cells provide a steady-state aerodynamic filter
ing regime and a continuous recovery, which operate under
constant centrifugal field conditions and do not require the
use of special accessories or additional energy expenditure. It
was suggested in  that that the creation of an adequate
driving force in the centripetal gas-and-dust flow may pre
vent formation of a deposit on the flat filter membrane.
To improve efficiency, throughput, applicability and re
covery of porous filter membranes, a fine gas-and-dust filter
for special application in the refractory technology has been
The newly designed dust collector uses the com
bined effect of a centrifugal force and filtration.
The filter (Fig. 1) is a box-shaped apparatus composed of
a casing 1, an inlet header 2, an outlet pipe 3, a chamber for
dust-laden 4 and treated gas 5, and a dust bin 6. The filter is
fitted with filter cells of porous metal 7. A rotary shaft 8 with
impellers 9 passing between filter cell sections is housed in-
side the casing.
With the shaft in rotation, the particles impinging on the
filter are subjected to the centrifugal force that drives them
away from the filter surface. Rotation speed of the medium
Refractories and Industrial Ceramics Vol. 45, No. 3, 2004
1083-4877/04/4503-0157 © 2004 Plenum Publishing Corporation
Semilukskii Refractory Plant Joint-Stock Co., Semiluki, Voro
nezh Region, Russia; Voronezh State Technological Academy,
RF Patent No. 2156642.
Fig. 1. Aerodynamic recovery filter: 1 ) casing; 2 ) inlet header;
3 ) outlet pipe; 4 ) treated gas chamber; 5 ) dust-laden gas chamber;
6 ) dust bin; 7 ) filter cells; 8 ) shaft with impellers; 9 ) impeller