FIELD: metallurgy.
SUBSTANCE: method involves decomposition of concentrate with alkali liquor in presence of oxidiser for oxidation of ferrous iron and manganese. Then, sodium tungstate solution is obtained and processed. As oxidiser there used is nitric-acid sodium and/or potassium salt taken with excess of 20% from the theoretically required quantity for oxidation of iron and manganese. Decomposition of concentrate is performed by means of water solution of sodium hydroxide with concentration of 25-30% at temperature of 130-140°C. The reaction mass obtained during decomposition is leached with water so that solution of sodium tungstate is obtained.
EFFECT: possibility of processing both of rich and poor tungstenite concentrates with high penetration degree without specifying any special requirements for their crushing quality.
2 tbl
Title | Year | Author | Number |
---|---|---|---|
METHOD FOR PROCESSING OF WOLFRAMITE | 1995 |
|
RU2094511C1 |
METHOD OF HYDROMETALLURGICAL DECOMPOSITION OF PERSISTENT WOLFRAMITE CONCENTRATES | 1995 |
|
RU2102512C1 |
METHOD FOR OPENING TUNGSTENITE CONCENTRATES | 2012 |
|
RU2506330C1 |
WOLFRAMITE CONCENTRATE PROCESSING METHOD | 2005 |
|
RU2293132C1 |
0 |
|
SU129195A1 | |
METHOD FOR PROCESSING TUNGSTEN CONCENTRATES | 2014 |
|
RU2572415C1 |
METHOD OF CONCENTRATING SCANDIUM DERIVED FROM WASTES OF WOLFRAMITE CONCENTRATE PROCESSING | 1993 |
|
RU2069180C1 |
METHOD OF PROCESSING TUNGSTEN CONCENTRATES | 2015 |
|
RU2605741C1 |
METHOD FOR RECOVERY OF TUNGSTEN FROM MANGANESE-TUNGSTATE CONCENTRATE | 1990 |
|
RU2024638C1 |
METHOD OF PROCESSING OF TUNGSTATE CONCENTRATES | 1993 |
|
RU2061077C1 |
Authors
Dates
2012-10-27—Published
2011-06-27—Filed