Optimisation of coal beneficiation in a jig in changing hydrodynamic conditions of its operation

with regard to the optimal useful fraction recovery in concentrate
and non-useful fraction in tailings. The process was evaluated based
on the industrial sampling of a jig for coal fines and granulometric
and densimetric analyses of collected product samples under
laboratory conditions. In separated size-density fractions of partition
products, yields of products were calculated, and their ash contents
were determined. The beneficiation curves were plotted on the basis
of the results of granulometric, densimetric and chemical analyses
of obtained size-density fractions, the balance of partition products
and appropriate calculations. This made it possible to evaluate the
process to optimise the device's operation to obtain higher recovery
with the possibly highest concentrate quality.
In the paper, the hard coal beneficiation results were evaluated with
regard to the optimal organic fraction recovery in concentrate and
mineral components in tailings with respect to the process control.
The obtained characteristics of beneficiation were analysed to select
the optimal technological coefficients for optimisation of the
device's operation on the basis of the Fuerstenau curve, Halbich
curve and selectivity curve.
Multi-criteria elaboration of research material, on the basis of the
qualitative approach of selectivity and Fuerstenau curves, indicated
differentiation during the beneficiation of fine and coarse particles
from the range of granulation being directed to the jigging process.
This is a commonly known fact, but it is not necessarily used in
industrial practice.