N2 - In technology of coal fines beneficiation in Poland mainly fines jigging processes are in use. In case
of steam coal fines beneficiation it is till 80% of the whole amount of produced assortments, while in
case of coking coal fines it is 100%.
The necessary condition of not homogenous feed separation which is directed to beneficiation process
in pulsating water stream is a sufficient liberation of particles. The stratification of particles in working
bed causes that particles of certain size, density and shape gather in individual layers in working bed of
jig. The introduction of sufficient amount of additional water determines appropriate liberation of particles
group, which generates partition into concentrate and tailings.
The paper presents the results of sampling of industrial jig used for the beneficiation of coal fines
by three various settings of additional amount of water under sieve which is directed to jigging. These
amounts were equal to 35, 50 and 70 [m3/h]. Collected samples of separation products were then sieved
into narrow particle size fractions and divided into density fractions. In such narrow size-density fractions
the coordinates of partition curves were calculated for tailings of hard coal fines, which were subsequently
approximated by means of Weibull distribution function. The separation precision measured by separation
density, probable error and imperfection were determined on the basis of obtained model separation
curves. The evaluation of separation effects was performed for a wide particle size fraction: feed directed
to jigging process and narrow particle size fractions. The analysis of separation results in size-density
fractions allowed to determine the influence of particle size change on the value of probable error. The
results of separation precision in size-density fractions were compared with effects of separation of wide
particle fraction, i.e. feed directed to jigging process.
JO - Archives of Mining Sciences
L1 - http://sd.czasopisma.pan.pl/Content/106736/PDF/Archiwum-63-2-12-Surowiak.pdf
L2 - http://sd.czasopisma.pan.pl/Content/106736
IS - No 2
KW - jig
KW - particle size
KW - separation precision
KW - probable terror
KW - Weibull distribution function
ER -
A1 - Surowiak, Agnieszka
PB - Committee of Mining PAS
VL - vol. 63
JF - Archives of Mining Sciences
T1 - The Analysis of Coal Fines Separation Precision Exposed to Changeable Hydrodynamic Parameters of Jig Work
UR - http://sd.czasopisma.pan.pl/dlibra/docmetadata?id=106736
DOI - 10.24425/122457