US4083716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium base treating agent of molten iron
Assignee: Aikoh Co Ltd
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Filing: 1976-10-04
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Granted: 1978-04-11
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Expires: 1996-10-04
Abstract
Abstract A magnesium base treating agent of molten iron characterized in that magnesium in the form of particle, powder or piece, having particle size of approximately less than 5 mm, contains one or more of additive components selected from the group of magnesia, zirconia, titania, graphite, coke, charcoal, clay, bentonite, resins, glue, cellulosic type binder, carbohydrate type binder and water-soluble silicic acid binder in 25 to 85% by weight over the whole weight of the moulding, and water of less than 1% by weight, the softening temperature after moulding is in the range from 1000 DEG to 1450 DEG C, and the porosity is between 20 and 50%.
Inventors
- 👤 Hiroshi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:15
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; C21C1/10; Y; Y10; Y10S; Y10S75/00; Y10S75/958; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A composite article having a porosity ranging from about 25 to about 50 percent for treating molten iron comprising a mixture of a plurality of magnesium particles, said particles having a particle size of less than about 5 mm; at least one additive component selected from the group consisting of magnesia, zirconia, titania, graphite, coke and charcoal; and at least one binder therefor selected from the group consisting of clay, bentonite, resins, cellulosic type binder and water-soluble silicic acid.
Claim 2
Dependent Claim
79 words
A composite article having a porosity ranging from about 25 to about 50 percent for treating molten iron comprising a mixture of a plurality of magnesium particles, said particles having a particle size of less than about 5 mm; at least one additive component selected from the group consisting of magnesia, zirconia, titania, graphite, coke and charcoal; and at least one binder therefor selected from the group consisting of clay, bentonite, resins, cellulosic type binder and water-soluble silicic acid.
Claim 3
Dependent Claim
16 words
The composite article of claim 1 which further includes up to about 1 weight percent water.
Claim 4
Dependent Claim
23 words
The composite article of claim 1 which is characterized by having a softening point ranging from about 1000° to about b 1450° C.
Claim 5
Dependent Claim
14 words
The composite article of claim 1 having at least one gas discharge orifice therein.
Claim 6
Dependent Claim
15 words
The composite article of claim 4 wherein said gas discharge orifice passes through said article.
Claim 7
Dependent Claim
19 words
The composite article of claim 5 wherein said gas discharge orifice has a diameter of less than 5 mm.
Claim 8
Dependent Claim
38 words
The composite article of claim 1 having on the outer surface thereof an outer layer comprised of at least one component additive selected from the group consisting of magnesia, zirconia, titania, graphite, coke, charcoal; and a binder therefor.
Claim 9
Dependent Claim
56 words
The composite article of claim 7 wherein said outer layer further includes particles of magnesium, said particle having a particle size of less than about 5 mm. and said particles being present in an amount, on a percent basis, which is less than the amount of magnesium particles present in said article without said outer layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |