US3982929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for a fluidizing flux in the production of iron and steel
Assignee: Esm Inc
•
Filing: 1973-02-09
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Granted: 1976-09-28
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Expires: 1993-02-09
Abstract
Abstract A composition for use as a basic flux to aid in obtaining slag fluidity in the production of iron and steel that includes a mixture, as expressed by percentage weight, of iron oxide in the range of 20 to 80%, aluminum in the range of 2 to 80%, and silica in the range of 5 to 60%. A composition for use as an acid flux to aid in obtaining slag fluidity in the production of iron and steel that includes a mixture, as expressed by percentage weight, of sodium oxide in the range of 5 to 50%, aluminum in the range of 2 to 60%, and silica in the range of 20 to 80%. The slag fluidizing ingredients are prereacted forming shaped bodies or powders which are then added as acid and basic fluxes to the steel making furnaces for the purpose of fluidizing the slag thus formed in order to separate and remove the slag from molten metal.
Inventors
- 👤 Willis A. Heck
- 👤 Roy E. Ferre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:23
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
An acid fluidizing flux composition for the production of iron and steel consisting essentially of an admixture of particulate constituents selected from a sodium salt selected from the group consisting of sodium silicate and sodium carbonate in an amount from about 5-50 percent by weight, silica in an amount from about 20-80 percent by weight and aluminum selected from the group consisting of aluminum oxides and powdered metallic aluminum in an amount from about 2-60 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
Claim 2
Dependent Claim
93 words
An acid fluidizing flux composition for the production of iron and steel consisting essentially of an admixture of particulate constituents selected from a sodium salt selected from the group consisting of sodium silicate and sodium carbonate in an amount from about 5-50 percent by weight, silica in an amount from about 20-80 percent by weight and aluminum selected from the group consisting of aluminum oxides and powdered metallic aluminum in an amount from about 2-60 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
Claim 3
Dependent Claim
71 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium silicate in an amount of 5 percent by weight, silica in an amount of 35 percent by weight, and powdered metallic aluminum in an amount of 60 percent by weight, said admixture being further characterized by constituting discrete particles formed from said particulate constituents wherein said particles comprise spherical pellets.
Claim 4
Dependent Claim
71 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium silicate in an amount of 5 percent by weight, silica in an amount of 35 percent by weight, and powdered metallic aluminum in an amount of 60 percent by weight, said admixture being further characterized by constituting discrete particles formed from said particulate constituents wherein said particles comprise spherical pellets.
Claim 5
Dependent Claim
66 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium carbonate in an amount of 50 percent by weight, silica in an amount of 30 percent by weight, and powdered metallic aluminum in an amount of 20 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
Claim 6
Dependent Claim
66 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium carbonate in an amount of 50 percent by weight, silica in an amount of 30 percent by weight, and powdered metallic aluminum in an amount of 20 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
Claim 7
Dependent Claim
66 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium carbonate in an amount of 25 percent by weight, silica in an amount of 40 percent by weight, and powdered metallic aluminum in an amount of 35 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
Claim 8
Dependent Claim
66 words
An acid fluidizing flux composition for the production of iron and steel comprising an admixture of particulate constituents selected from sodium carbonate in an amount of 25 percent by weight, silica in an amount of 40 percent by weight, and powdered metallic aluminum in an amount of 35 percent by weight, said admixture being further characterized by constituting discrete composite particles formed from said particulate constituents.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |