Patent US4332910A successfully refreshed from Google Patents.
US4332910A
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Free flowing metallurgical well powder
Assignee: Vibrantz Corp
•
Filing: 1981-03-02
•
Granted: 1982-06-01
•
Expires: 2001-03-02
Abstract
Abstract There is provided a metallurgical well powder having reduced tendencies to hinder the flow of molten metal, by packing and jamming the opening, in a steel ladle for example, through which said molten metal will be teemed upon tapping said ladle.
Inventors
- 👤 Bruce E. Dunworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:21
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/44; B22D41/46; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/481
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A free-flowing, pelletized, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________
Claim 2
Dependent Claim
41 words
A free-flowing, pelletized, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________
Claim 3
Dependent Claim
41 words
A free-flowing, pelletized, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________
Claim 4
Dependent Claim
41 words
A free-flowing, pelletized, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________
Claim 5
Dependent Claim
42 words
A free-flowing, pelletized, sintered, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________
Claim 6
Dependent Claim
42 words
A free-flowing, pelletized, sintered, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________
Claim 7
Dependent Claim
42 words
A free-flowing, pelletized, sintered, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________
Claim 8
Dependent Claim
42 words
A free-flowing, pelletized, sintered, metallurgical well powder having essentially the following composition: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________
Claim 9
Dependent Claim
103 words
A free flowing, sized, pelletized, metallurgical well powder having essentially the following components present as a compacted, thoroughly admixed interspersion thereof: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ said, pelletized, particulate well powder composition having the following fines distribution following sizing: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
______________________________________ ______________________________________
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________
Claim 10
Dependent Claim
103 words
A free flowing, sized, pelletized, metallurgical well powder having essentially the following components present as a compacted, thoroughly admixed interspersion thereof: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ said, pelletized, particulate well powder composition having the following fines distribution following sizing: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
______________________________________ ______________________________________
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________
Claim 11
Dependent Claim
100 words
A free-flowing, sized, pelletized, metallurgical well powder having essentially the following components present as a compacted, thoroughly admixed interspersion thereof: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________ said pelletized, particulate well powder composition having the following fines distribution following sizing: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________
Claim 12
Dependent Claim
100 words
A free-flowing, sized, pelletized, metallurgical well powder having essentially the following components present as a compacted, thoroughly admixed interspersion thereof: ______________________________________
natural zircon sand (80 to 200 mesh)
35 to 50% by wt.
zircon, <325 mesh 50 to 60% by wt.
zircon, <600 mesh 7.5 to 12.5% by wt.
______________________________________ said pelletized, particulate well powder composition having the following fines distribution following sizing: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________
Claim 13
Dependent Claim
10 words
The well powder of claim 1 which has been sintered.
Claim 14
Dependent Claim
10 words
The well powder of claim 2 which has been sintered.
Claim 15
Dependent Claim
13 words
The well powder of claim 5 which has been sintered prior to sizing.
Claim 16
Dependent Claim
13 words
The well powder of claim 6 which has been sintered prior to sizing.
Claim 17
Independent Claim
144 words
The method of producing a free-flowing, sized, pelletized, metallurgical well powder comprising the following steps: a. Thoroughly admixing and interspersing the following components in their respective amounts as indicated: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ b. Compacting and pelletizing the admixture of step (a) c. Fragmenting and sizing the pellets of step (b) to a particulate composition having the following fines distribution: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________ to provide a metallurgical well powder for protecting the slide gate system of a metallurgical ladle from molten metal contained therein.
Claim 18
Independent Claim
144 words
The method of producing a free-flowing, sized, pelletized, metallurgical well powder comprising the following steps: a. Thoroughly admixing and interspersing the following components in their respective amounts as indicated: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ b. Compacting and pelletizing the admixture of step (a) c. Fragmenting and sizing the pellets of step (b) to a particulate composition having the following fines distribution: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________ to provide a metallurgical well powder for protecting the slide gate system of a metallurgical ladle from molten metal contained therein.
Claim 19
Independent Claim
152 words
The method of producing a free-flowing, sized, pelletized, metallurgical well powder comprising the following steps: a. Thoroughly admixing and interspersing the following components in their respective amounts as indicated: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ b. Compacting and pelletizing the admixture of step (a) c. Sintering the pelletized admixture to step (b) d. Fragmenting and sizing the pellets of step (c) to a particulate composition having the following fines distribution: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________ to provide a metallurgical well powder for protecting the slide gate system of a metallurgical ladle from molten metal contained therein.
Claim 20
Independent Claim
152 words
The method of producing a free-flowing, sized, pelletized, metallurgical well powder comprising the following steps: a. Thoroughly admixing and interspersing the following components in their respective amounts as indicated: ______________________________________
natural zircon sand (80 to 200 mesh)
25 to 60% by wt.
zircon, <325 mesh 40 to 70% by wt.
zircon, <600 mesh 0 to 15% by wt.
______________________________________ b. Compacting and pelletizing the admixture of step (a) c. Sintering the pelletized admixture to step (b) d. Fragmenting and sizing the pellets of step (c) to a particulate composition having the following fines distribution: ______________________________________
Range (Wt. %)
______________________________________
-6 mesh 100.0
6 to 8 mesh 12.0 max.
8 to 14 mesh 40-60
14 to 28 mesh 30-45
28 to 65 mesh 0-10
-65 mesh 5 max.
-80 mesh 0
______________________________________ to provide a metallurgical well powder for protecting the slide gate system of a metallurgical ladle from molten metal contained therein.
References Cited (Backward Citations)
US2633623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |