| 摘要 |
<p>1. A method for recovery of metals from essentially metallic fines, comprising the following steps: a) supplying said essentially metallic fines (50) to a flame (25) of an oxy-fuel burner (20), b) bringing said fines to agglomerate by means of heat from said flame (25) without essentially changing the chemical composition thereof, thereby providing an essentially metallic agglomerated product (60), and c) recovering said agglomerated product (60). 2. The method according to claim 1, wherein said burner is supplied with an oxidizing gas having an O2 content of at least 21% O2. 3. The method according to claim 2, wherein said burner is supplied with an oxidizing gas having an O2 content of at least 90% O2. 4. The method according to any of claims 1-3, wherein said metallic fines (50) are ferro-silicon, ferro-chromium, or iron powder. 5. The method according to any of claims 1-4, wherein said metallic fines (50) have a diameter of less than approximately 5 mm, and more preferably a diameter of less than approximately 1 mm. 6. The method according to any of claims 1-5, wherein the step c) of recovering said agglomerated product (60) comprises feeding said product to a furnace. 7. The method according to any of claims 1-6, wherein the recovering of step c) is performed in one of the following furnace types: an electric arc furnace, an induction furnace, a reverberatory furnace, or an electrically heated furnace. 8. The method according to any of claims 1-7, wherein the agglomeration process of step b) is controlled by means of at least some of the following parameters: temperature and velocity of said flame (25), energy content or density of said fines (50), the ratio oxidizing gas to added fuel of said burner (20), the oxygen content of said oxidizing gas, the supply rate of oxygen and added fuel, the supply rate of said fines and their characteristics, the travel time of said fines in said flame, and burner characteristics and configuration, such as tilting. 9. The method according to any of claims 1-8, wherein at the agglomeration process of step b) is controlled so at least some of said fines (50) are only partly melted. 10. The method according to any of claims 1-9, wherein step a) comprises supplying said fines (50) essentially to the central portion of said flame (25). 11. The method according to any of claims 1-10, wherein said fines are intermixed in a liquid, and wherein step b) comprises bringing said liquid part to vaporize by means of said flame.</p> |
