Characteristics:
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Molybdenum oxide block
As with molybdenum, molybdenum oxide block is often used as additives a molybdenum alloy steel. It uses molybdenum calcined sand as raw material, which can be used only for molding and processing. It has higher molybdenum recovery rate and lower processing cost than ferromolybdenum. In Western countries, it has gradually replaced ferromolybdenum, which is more widely used than ferromolybdenum and accounts for a larger proportion. See Table 1.
Table 1 US molybdenum oxide and ferromolybdenum production and proportion
Year (year)
category
1980
1981
1982
1983
1984
Molybdenum oxide production (t)
16366
16393
8069
7918
7361
Ferro Molybdenum Production (t)
3608
3304
1701
1543
1169
Molybdenum oxide production / ferromolybdenum production (times)
4.5
5.0
4.7
5.1
6.3
  Â
The proportions of ferromolybdenum and molybdenum oxide in various applications are shown in Tables 2 and 3.
Table 2 Distribution of molybdenum oxide and ferromolybdenum in the United States in 1974
Name
Consumption (%)
Product name
alloy steel
Low alloy high strength steel
stainless steel
Tool steel
cast iron
High temperature special alloy
Other alloy products
Metal mo
Chemicals
other
Industrial molybdenum
90.7
85.4
79.3
73.3
23.7
36.9
6.0
66.0
71.2
Molybdenum iron
8.5
13.7
19.6
25.2
73.8
18.9
76.2
17.0
Other
0.8
0.9
1.1
1.5
2.5
44.2
17.8
100.0
34.0
11.8
Total
100.1
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
Table 3 Production of molybdenum and molybdenum oxide by 10 Japanese companies
year
factory
Product name
Ritsu Chemical Industry
Sun miner
Japanese steel pipe
Fried mining
Showa Denko
Japanese new metal
Ticket Village Metal Industry
Japanese electrician
Steel raft product
Zhongyuan Industry
total
Ferro Molybdenum (%)
Molybdenum oxide (%)
1973
Ferromolybdenum
566..0
465.0
307
831
379
557
211
3310
20.41
Molybdenum oxide
2129
3005
1390
2021
4462
1032
449
761
390
274
12913
79.59
1974
Ferromolybdenum
487
533
137
1047
373
675
218
3489
22.71
Molybdenum oxide
1893
3006
1144
2131
1144
901
1205
696
411
284
11875
77.29
China is still dominated by ferromolybdenum and the amount of molybdenum oxide is very small (Table 4).
Molybdenum oxide, which is a steel additive, is often used as a molybdenum compact. The product standards are shown in Table 5.
From 1983 to 1985, China produced about 2,500 tons of molybdenum compacts. The main manufacturers include Jinzhou Ferroalloy Plant and Shanghai Ferroalloy Plant, as well as Luanchuan Molybdenum Company.
Table 4 China's molybdenum oxide and ferromolybdenum production and proportion
Year (year)
species
1983
1984
Molybdenum oxide production (t)
738
762
Ferro Molybdenum Production (t)
4708
5585
Molybdenum oxide and ferromolybdenum production ratio (times)
0.16
0.14
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Table 5 Molybdenum oxide alloy additive standard
Country and standard
grade
Mo content (%) 1 ≥
Impurity content (%) < or ≤ 2
package
Cu
S
P
C
FeO
Pb
As
Sn
H 2 O
American ASTM146
A
55.0
1.0
0.25
0.05
Barrel or briquetting, 10 or 1kg/block
B
57.0
1.0
0.10
United Kingdom
55.0~60.0
0.3
0.10
1~3
Briquetting block
Japan
Low carbon
55.0~61.0
0.1
0.05
0.05
Press block 0.5kg / block 25kg / box
High carbon
53.0~54.0
0.1
0.05
8~10
Pre-West
60.0~62.0
0.2
0.03~0.09
0.2~0.04
Barrel
Former Soviet Union
KMo-1
55
0.6
0.15
0.07
0.08
Barrel 10~40kg
KMo-2
53
1.2
0.18
0.07
0.10
0.07
0.07
KMo-3
50
2.4
0.20
0.07
0.12
Sweden
57~63
0.5
0.01
0.05
Canned 10kg
China
YMo-48
48
1.0
0.10
0.04
0.20
0.04
0.05
0.5
Briquetting, barreled. 5kg / block 30kg / barrel
YMo-45
45
1.0
0.15
0.04
0.20
0.06
0.07
0.5
YMo-40
40
2.0
0.80
0.04
0.20
0.10
0.10
0.5
1 The former Soviet Union is “≥†and the rest is “>â€; 2 China is “≤†and the rest is “<â€.
From molybdenum calcine to molybdenum compact is a simple pressure forming process. The production process is shown in the figure below.
The binder is usually bitumen , and the amount is very small. Many processes use only a high pressure molding machine to add water or even no binder. The amount of water added should not be too large, and it is limited to the slight moisture of the calcined sand.
Figure Molybdenum compact production process
The pressure block can be large or small, 0.5~5kg. The shape is square and round, and most of them are mostly cylindrical. For example, Japan is a 65 × 60mm cylinder with a weight of 0.5kg and a density of 2.7g/cm 3 . The domestic Luanchuan is a truncated cone body with a heavy weight of lkg.