2050 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
microsomes. The chitin group is present as a small number
of microsporangia (Figure 1f), black worm-like. Minerals
are predominantly clay-like and pyrite, see (Figure 1g) and
(Figure 1h), respectively.
FTIR Analysis
A VERTEX80/80v FTIR spectrometer was used for infra-
red analysis of the enrichments in the vitrinite and iner-
tinite, and the results are shown in Figure 2. From the
infrared spectra graph, it can be seen that the vitrinite is
slightly higher than theinertinite, and the methyl group is
easy to break in the process of hydro-liquefaction, and the
liquefaction performance of the vitrinite is higher than that
of the inertinite. The mineral content of Shenhua coal sam-
ples is lower, and the absorption peaks of mineral groups
are weaker.
Methods
Rod Grinding Test
For the grinding test, HLXMB-III type rod mill (see
Figure 3) and 1L volume grinding drum were selected, and
steel rods were used to grind the ore, of which 6 rods of
12 mm diameter, 5 rods of 14 mm diameter and 4 rods of
16 mm diameter, totalling 15 rods. The grinding type is dry
grinding with digital display control. The rods are in line
contact with each other during the rod milling process. The
steel rods in the grinding drum form a sieve-like structure
between the rods, so that the fine particles can escape from
the slits during the grinding process and the coarse particles
are further crushed.
Enhanced Gravity Separation Test
The enhanced gravity separation testutilises a Falcon
centrifugal separator, as shown in Figure 4, which has a
centrifugal force of up to 300G (Ma and Tao 2022), a char-
acteristic that offers the possibility of sorting low-density
dissimilarity minerals (Duan et al. 2009 Das and Sarkar
2018). The main sorting parts of the sorting machine con-
sists of a rotating drum and a rifling ring with a backwash
hole. The material is fed into the bottom of the rotor of
Falcon separator by peristaltic pump after adjusting the
slurry, and thrown to the inner wall of the rotor under the
action of centrifugal force. Then it is subjected to the action
of backwash water shot vertically between the inner and
outer rotor, which makes the material bed in the rifling cir-
cle to be loosened up, and the materials with high density
sink to the bottom of the rifling circle under the action of
Figure 1. The morphology of low-rank coal sample (continued)
microsomes. The chitin group is present as a small number
of microsporangia (Figure 1f), black worm-like. Minerals
are predominantly clay-like and pyrite, see (Figure 1g) and
(Figure 1h), respectively.
FTIR Analysis
A VERTEX80/80v FTIR spectrometer was used for infra-
red analysis of the enrichments in the vitrinite and iner-
tinite, and the results are shown in Figure 2. From the
infrared spectra graph, it can be seen that the vitrinite is
slightly higher than theinertinite, and the methyl group is
easy to break in the process of hydro-liquefaction, and the
liquefaction performance of the vitrinite is higher than that
of the inertinite. The mineral content of Shenhua coal sam-
ples is lower, and the absorption peaks of mineral groups
are weaker.
Methods
Rod Grinding Test
For the grinding test, HLXMB-III type rod mill (see
Figure 3) and 1L volume grinding drum were selected, and
steel rods were used to grind the ore, of which 6 rods of
12 mm diameter, 5 rods of 14 mm diameter and 4 rods of
16 mm diameter, totalling 15 rods. The grinding type is dry
grinding with digital display control. The rods are in line
contact with each other during the rod milling process. The
steel rods in the grinding drum form a sieve-like structure
between the rods, so that the fine particles can escape from
the slits during the grinding process and the coarse particles
are further crushed.
Enhanced Gravity Separation Test
The enhanced gravity separation testutilises a Falcon
centrifugal separator, as shown in Figure 4, which has a
centrifugal force of up to 300G (Ma and Tao 2022), a char-
acteristic that offers the possibility of sorting low-density
dissimilarity minerals (Duan et al. 2009 Das and Sarkar
2018). The main sorting parts of the sorting machine con-
sists of a rotating drum and a rifling ring with a backwash
hole. The material is fed into the bottom of the rotor of
Falcon separator by peristaltic pump after adjusting the
slurry, and thrown to the inner wall of the rotor under the
action of centrifugal force. Then it is subjected to the action
of backwash water shot vertically between the inner and
outer rotor, which makes the material bed in the rifling cir-
cle to be loosened up, and the materials with high density
sink to the bottom of the rifling circle under the action of
Figure 1. The morphology of low-rank coal sample (continued)