Molybdenum basic overview

1. Overview Molybdenum ranks among the top in the world in reserves in China. Liaoning province Jinxi, Shanxi Jinduicheng, Jilin, Shanxi, Henan, Fujian, Guangdong, Hunan, Sichuan, and Jiangxi provinces all have molybdenum deposits with large reserves and good development conditions. Production plays an important role in the country. The molybdenum mineral with industrial value is mainly molybdenite (MoS2), and about 99% of the molybdenum ore is mined in the form of molybdenite (MoS2). At present, China's molybdenum concentrate is mainly exported to Russia, Japan and Western countries.
2. Properties MoS2 is lead-gray, similar to graphite, metallic luster, is a hexagonal crystal, crystals are often hexagonal sheets, the bottom is often a pattern, soft and smooth, thin and flexible. Specific gravity of 4.7 to 4.8, hardness of 1 ~ 1.5, melting point of 795 °C, MoS2 streak marks on the ceramic plate is light green gray or light green black, heated to 400 ~ 500 °C when MoS2 is easily oxidized to generate MoS3, nitric acid Both aqua and aqua can decompose molybdenite (MoS2).
3. Applications MoS2 is used to produce ferro-molybdenum alloys, molybdenum metal, calcium molybdate, ammonium molybdate, lubricants, etc.
4. Production Molybdenite (MoS2) is a mineral that is easy to flotate, and flotation is the main method of MoS2 selection. 85 to 95% of molybdenum concentrates can be obtained by flotation, with a total recovery of 90%.
5. The packaged molybdenum concentrates are packaged in the following two ways: 1 Inner glass fiber bag, outer sack, net weight 50kg; 2 Inner latex bag, outer sack net weight 25-30kg or 50kg.
6. Quality specifications and chemical composition According to the technical conditions of GB3200-89 molybdenum concentrate, there are nine grades of three grades (see Table 6-6-39).
Table 6-6-39 Molybdenum concentrate quality specifications

grade
species
Molybdenum% not less than
Impurity %, not more than
SiO2
As
Sn
P
Cu
Pb
Cao
Premium products
one type
51
7.0
0.05
0.04
0.03
0.2
0.30
2.8
Category II
51
8.5
0.03
0.02
0.02
0.2
0.15
1.4
Three types
51
5.0
0.10
0.10
0.05
0.5
0.60
1.5
First class product
one type
47
9.0
0.07
0.07
0.05
0.3
0.40
3.0
Category II
47
11.0
0.05
0.05
0.03
0.3
0.20
2.0
Three types
47
6.0
0.20
0.15
0.10
1.0
1.50
1.5
Secondary products
one type
45
12.0
0.07
0.07
0.07
0.3
0.50
3.0
Category II
45
13.0
0.06
0.06
0.04
0.3
0.30
2.0
Three types
45
6.0
0.25
0.15
0.15
1.5
1.50
2.0
Note: 1 in the table, the second type is the molybdenum concentrate product produced by the flotation method, the third type is the tungsten or tin molybdenum and other polymetallic ore and other molybdenum concentrates; 2 the molybdenum concentrate is a valuable element. The supplier should provide analysis data.
7. Inspection standards The export of molybdenum concentrate chemical composition is tested in accordance with GB/T 15079-94.
8. Precautions 1 According to the user's requirements, the production unit can supply Mo ≥ 54% molybdenum concentrate products; 2 Through the agreement between the supply and demand sides, individual indicators in the above table can be adjusted; 3 Flotation of molybdenum concentrate product size requirements through 200 mesh sieve Substances shall not be less than 60%; the grain size of the comprehensive recovery of molybdenum concentrate products shall be subject to agreement between supply and demand; 4 the sum of moisture and oil content of molybdenum concentrate products shall not be greater than 4%; 5 foreign materials shall not be mixed in the concentrate products.

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