XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3039
particles. Therefore, the ground product of molybdenite
will expose a larger proportion of the edge surfaces, and
processing with planetary ball mills will expand the differ-
ences in surface properties between molybdenite and talc,
thereby facilitating flotation separation of the two minerals.
CONCLUSION
The main associated minerals of molybdenite in the
molybdenum rough concentrate of the CMOC Mineral
Processing Company No. 1 were talc and pyrite. After pre
flotation of the rougher concentrate, a Mo pre cleaner con-
centrate with a grade of 28.45% was obtained. The use of
planetary ball mills was beneficial for the flotation separa-
tion of molybdenite and talc. Using stainless steel balls as
grinding media, the final concentrate grade of molybde-
num was 38.17%, and the flotation recovery was 79.33%.
In the planetary ball mill, the main comminution mecha-
nism of molybdenite was surface comminution, while the
Mo reverse flotation
Mo concentrate
pH?12
MIBC 20
Mo Pre cleaner concentrate
Reagent dosage: g/t
(ralative to Mo Pre cleaner concentrate)
Mo tailing
Planetary ball mill grinding
Figure 4. Molybdenite cleaning test process
6 :34 38 42
2
42
62
82
:2
322
Grinding time/min
Agate ball
Zirconia ball
Stainless steel ball
Figure 5. Effect of grinding conditions on recovery of
molybdenite cleaning
3 32 322 3222
2
4
6
8
:
32
34
0 min
3 min
6 min
12 min
24 min
(a)
3 32 322 3222
2
4
6
8
:
32
0 min
3 min
6 min
12 min
24 min
(b)
Figure 6. Particle size distribution of molybdenite and talc ground by planetary ball mill: (a)molybdenite, (b) talc
Mo
recovery/%
Volume
Density(%)
Volume
Density(%)