US3902895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the treatment of fusible non-ferrous metals, particularly copper, by means of a blowing-on of reaction gases
Assignee: Individual
•
Filing: 1974-02-11
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Granted: 1975-09-02
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Expires: 1994-02-11
Abstract
Abstract A method for the separation of companion elements of a nonferrous metal dissolved in a liquid bath, particularly in copper, through conversion of the companion elements into compounds which are insoluble in the liquid metal, includes blowing-on of reaction gases. More specifically, the reaction gases are blown on through at least one gas jet approximately perpendicularly to the essentially smooth bath surface and with such great force that the melt, rotating essentially like a torus about the blower impression located at the stagnation point of the jet together with the gas jet, results in a reaction unit with definite material transition, limited by the convection conditions of the system.
Inventors
- 👤 Wolfgang Wuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/05; C22B15/00; C22B15/0026; C22B15/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
IN A METHOD OF SEPARATING COMPANION ELEMENTS, OF A NONFERROUS METAL DISSOLVE IN A LIQUID BATH, PARTICULARLY IN COPPER WHEREIN THE COMPANION METALS ARE CONVERTED INTO COMPOUNDS WHICH ARE INSOLUBLE IN THE LIQUID METAL BY BLOWING REACTION GASES ONTO THE LIQUID BATH, THE IMPROVEMENT THEREIN COMPRISING THE STEP OF: FORMING A REACTION UNIT BY DIRECTING A GAS JET APPROXIMATELY PERPENDICULAR TO THE SMOOTH BATH SURFACE AND WITH A FORCE SUFFICIENT TO CAUSE UPWARD BLOWING OF THE GASES AND A VERTICAL TORODIAL-LIKE ROTATION OF THE MELT AND DIRECTED UPWARDLY ABOUT THE BLOWER IMPRESSION LOCATED AT THE STAGNATION POINT OF THE JET WHICH TOGETHER WITH THE GAS JET EFFECTS A REACTION UNIT WITH DEFINITE MATERIAL TRANSITION LIMITED BY THE CONVECTIVE CONDITIONS OF THE SYSTEM
Claim 2
Dependent Claim
122 words
IN A METHOD OF SEPARATING COMPANION ELEMENTS, OF A NONFERROUS METAL DISSOLVE IN A LIQUID BATH, PARTICULARLY IN COPPER WHEREIN THE COMPANION METALS ARE CONVERTED INTO COMPOUNDS WHICH ARE INSOLUBLE IN THE LIQUID METAL BY BLOWING REACTION GASES ONTO THE LIQUID BATH, THE IMPROVEMENT THEREIN COMPRISING THE STEP OF: FORMING A REACTION UNIT BY DIRECTING A GAS JET APPROXIMATELY PERPENDICULAR TO THE SMOOTH BATH SURFACE AND WITH A FORCE SUFFICIENT TO CAUSE UPWARD BLOWING OF THE GASES AND A VERTICAL TORODIAL-LIKE ROTATION OF THE MELT AND DIRECTED UPWARDLY ABOUT THE BLOWER IMPRESSION LOCATED AT THE STAGNATION POINT OF THE JET WHICH TOGETHER WITH THE GAS JET EFFECTS A REACTION UNIT WITH DEFINITE MATERIAL TRANSITION LIMITED BY THE CONVECTIVE CONDITIONS OF THE SYSTEM
Claim 3
Dependent Claim
38 words
The improved method of claim 1, wherein the bath is copper and the gas includes oxygen, comprising the steps of: adjusting the jet force and jet-to-surface distance to prevent direct splashing of the bath on the impression point.
Claim 4
Dependent Claim
46 words
The improved method of claim 1, wherein the bath is copper and the gas includes oxygen, comprising the step of increasing the oxygen content of the bath, in accordance with the required minimum content of one or more companion elements, to just below the saturation limit.
Claim 5
Dependent Claim
26 words
The improved method of claim 1, wherein the reaction unit is formed with a diameter of 3, and a depth of 1.5, times the impression diameter.
Claim 6
Dependent Claim
43 words
The improved method of claim 1, wherein the step of forming a reaction unit is further defined by the steps of: directing several aligned gas jets perpendicularly to the bath surface at a spacing of two to five times the blower impression diameter.
References Cited (Backward Citations)
US3459415A
Cited
US3395908A
Cited
US3527449A
Cited
US3525509A
Cited
US3582057A
Cited
US3519259A
Cited
US3690634A
Cited
US3666440A
Cited
US3743263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |