30
Comparison of product income for 100% magnetite and
40:60 blend
In order to give a full picture of the profitability of using a
40wt% pyrrhotite + 60wt% magnetite blend, a comparison
of the revenue potential for the two dense media options
was carried out. The results of product grades highlighted in
Table 2 ranging from 27.70 to 25.01MJ/Kg above were used.
The revenue from the two coal products was calculated based
on the following:
I. Coal prices (Prevost, 2017),
II. Plant technical parameters (Zhao et al., 2016),
III. Different operating parameters used in the investigation.
Table 3: Monthly income analysis for 100wt%magnetite and
40wt% pyrr + 60wt%magnetite
Index
ADMFB separator dense
medium
100%
magnetite
40% pyrr
+ 60%
magnetite
Daily throughput (t)
1 000
Monthly throughput (t)
30 000
Recovery (average) %
60
53
Clean coal product (t)
18 000
15 900
Product price per ton (ZAR)
600
790
Monthly revenue (ZAR)
10 800 000 12 561 000
Monthly dense medium cost
(ZAR)
360 000
216 000
Expected ‘Profit’ (ZAR)
10 440 000 12 345 000
The expected profit that could be generated from an ADMFB
using two different media based on the average SA inland
sized coal prices are depicted in Table 3. The cost for a clean
coal product, grades B and D are ZAR790,00 and ZAR600,00,
respectively. Therefore, according to this study the 100%
magnetite clean coal product and 40 wt% pyrrhotite + 60wt%
magnetite products are expected to be ZAR600,00 and
ZAR790,00 per ton, respectively. Therefore, considering the
yield and dense medium cost for each product, it can be seen
that higher ‘profits’ can be expected for the latter because of
the higher quality product.
