Claims
- 1. A process for the concentration of titanium containing anatase ore comprising:
- (a) calcining the said anatase ore in a non-reducing atmosphere at a temperature below that of rutilization;
- (b) cooling said calcined ore;
- (c) reducing the cooled ore in a reducing atmosphere at temperatures between 400.degree. C. and 600.degree. C.;
- (d) cooling the reduced ore to below 200.degree. C. in an atmosphere to prevent reoxidation;
- (e) subjecting the reduced ore to magnetic separation to produce a concentrated titanium containing non-magnetic fraction;
- (f) subjecting the non-magnetic fraction to mineral acid leach to remove additional impurities; and
- (g) neutralizing and washing said acid leached fraction to produce a concentrated titanium fraction.
- 2. The process of claim 1 wherein said calcination is carried out at a temperature below 900.degree. C.
- 3. The process of claim 1 wherein said reduction is effected in an atmosphere containing at least 10% of reducer gas.
- 4. The process of claim 1 wherein said magnetic separation is effected in a magnetic field in the range of from 400 to 1500 gauss.
Parent Case Info
This application is a continuation in-part of Ser. No. 741,625, filed Nov. 15, 1976 and now abandoned.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
741625 |
Nov 1976 |
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