Properties: light yellow powder, insoluble in water and acid (except for HF), can slowly dissolved in concentrated alkali solution.
Specifications:
Grade
FWO3-1
FWO3-2
FWO3-3
WO3 (%)≥
99.95
99.9
99.5
Impurity content
(as WO)
not more than
%
Pb
0.0005
0.001
/
Bi
0.0005
0.001
/
Sn
0.0007
0.001
/
Sb
0.001
0.001
/
As
0.002
0.002
0.010
Fe
0.001
0.005
0.010
Al
0.001
0.001
0.002
Si
0.002
0.003
0.008
Ni
0.0007
0.002
Ca
0.002
0.003
(Ca+Mg)
0.015
Mg
0.001
0.004
(Mg+Ca)
0.015
K
0.002
0.002
(K+Na)
0.015
Na
0.002
0.004
(Na+K)
0.015
Cu
0.0007
0.001
/
Mn
0.001
0.002
/
Mo
0.005
0.03
0.10
P
0.0007
0.004
0.015
S
0.001
0.001
0.007
Chlorination residue
/
/
0.07
Loss on ignition (%)
0.5
0.5
0.5
Sieving size (mesh)
-40 100%
-40 100%
-40 100%
Bulk density g/cm3
0.5-2.5
Uses: Used in the manufacture of metal tungsten powder, tungsten carbide powder, tungsten carbide and other tungsten products.
Packing: 25kg Cardboard barrel or plastic woven bag .
Not: special specifications are negotiable.
