FIELD: processing vanadium-containing converter slag.
SUBSTANCE: proposed method includes roasting of slag with reaction additive, leaching-out cinder by soda solution for obtaining vanadate solution and separating vanadium oxide from it. At roasting, waste slag of vanadium process is introduced as reaction additive; waste slag contains hematite and manganese oxide at mole ratio of vanadium to manganese equal to 1:1. Roasting is performed at 800-850°C for 3 h; leaching-out is carried out with soda solution at mole ratio of V2O5:Na2CO3 equal to 1:1.2-1.8 including filtration of sodium vanadate solution and flushing the sediment with water. Vanadium and sodium are separated from solution thus obtained by electrochemical treatment in membrane system, sorption or neutralization by sulfuric acid followed by sedimentation of polyvanadium acid salts.
EFFECT: increased extraction of vanadium products; reduction of waste water disposal.
1 dwg, 8 tbl, 8 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PROCESSING VANADIUM CONTAINING CONVERTER SLAG | 2008 |
|
RU2385353C2 |
PROCESS FOR RECOVERY OF VANADIUM | 1995 |
|
RU2082795C1 |
METHOD OF PROCESSING OF VANADIUM-CONTAINING CONVERTER SLAGS | 1999 |
|
RU2157420C1 |
METHOD OF PROCESSING OF VANADIUM-CONTAINING CONVERTER SLAGS | 2000 |
|
RU2157419C1 |
METHOD OF VANADIUM-BEARING CONVERTER SLAGS PROCESSING | 2003 |
|
RU2230128C1 |
METHOD FOR PROCESSING OF VANADIUM-CONTAINING SLAGS | 2004 |
|
RU2263722C1 |
METHOD OF EXTRACTION OF VANADIUM | 2001 |
|
RU2193072C1 |
METHOD OF ISOLATING VANADIUM | 1997 |
|
RU2118389C1 |
METHOD OF RECOVERING VANADIUM FROM SLAGS | 1995 |
|
RU2090640C1 |
METHOD OF PROCESSING OF VANADIUM-CONTAINING CONVERTER SLAG | 1990 |
|
RU2033448C1 |
Authors
Dates
2005-12-20—Published
2003-05-06—Filed