US3633656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making ingots
Assignee: United States Steel Corp
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Filing: 1970-02-20
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Granted: 1972-01-11
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Expires: 1990-02-20
Abstract
Abstract A large generally cylindrical ingot mold is provided with four sections of tubing around its outer surface except for some distance from its top. A valve-controlled water feed and a valvecontrolled steam feed are provided to each of the sections. The intermediate cooling sections have a greater cooling effect per square foot of mold surface than the top and bottom sections. After molten steel is poured into the mold, steam is fed into all four sections for several hours. Then at spaced time intervals steam is turned off and water turned on successively to the bottom section, the second section, the third section and finally to the top section. This condition exists for a time period longer than the period with steam on. Then at spaced time intervals water is turned off and steam turned on successively to the bottom section, the second section, the third section, and finally to the top section. The steam is turned off prior to stripping of the mold from the ingot.
Inventors
- 👤 Leonard M Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:39
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/064
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
In combination with a large generally cylindrical metallic ingot mold having a minimum diameter of approximately 75 inches; a bottom cooling tubular section closely surrounding the outside periphery of said mold adjacent the bottom thereof, a top cooling tubular section closely surrounding the outside periphery of said mold starting a substantial distance from the top thereof with the portion of the mold above the top cooling section being free of cooling sections, at least one intermediate cooling tubular section closely surrounding the outside periphery of said mold between the top and bottom sections, each of said cooling sections extending substantially completely around the outside of the mold and in heat transfer relationship with the mold surface, and means for introducing a fluid coolant to said sections, said intermediate cooling section being so arranged on said mold surface so as to have a greater cooling effect per square foot of mold surface than said top and bottom sections.
Claim 2
Dependent Claim
157 words
In combination with a large generally cylindrical metallic ingot mold having a minimum diameter of approximately 75 inches; a bottom cooling tubular section closely surrounding the outside periphery of said mold adjacent the bottom thereof, a top cooling tubular section closely surrounding the outside periphery of said mold starting a substantial distance from the top thereof with the portion of the mold above the top cooling section being free of cooling sections, at least one intermediate cooling tubular section closely surrounding the outside periphery of said mold between the top and bottom sections, each of said cooling sections extending substantially completely around the outside of the mold and in heat transfer relationship with the mold surface, and means for introducing a fluid coolant to said sections, said intermediate cooling section being so arranged on said mold surface so as to have a greater cooling effect per square foot of mold surface than said top and bottom sections.
Claim 3
Dependent Claim
37 words
The combination of claim 1 in which each of said cooling sections are separate from the others, and said means for introducing a fluid coolant includes a separate feed and a separate control valve to each section.
Claim 4
Dependent Claim
45 words
The combination of claim 2 in which the coolant includes both water and steam, and in which said means for introducing a fluid coolant includes a separate water feed and a separate steam feed to each section, and a separate control valve for each feed.
Claim 5
Dependent Claim
56 words
The combination of claim 2 in which each tubular section comprises a tube wound helically around the mold, the average pitch of the cooling tubes in the top and bottom sections being greater than the average pitch of the tubes in the intermediate section in order to obtain the greater cooling effect in the intermediate section.
Claim 6
Dependent Claim
84 words
The combination of claim 1 in which there are two intermediate sections, the bottom section covering between 20 and 30 percent of the height of the mold, each of the intermediate section covering between 10 and 20 percent of the height of the mold, the top section covering between 20 and 30 pErcent of the height of the mold, and the top of the mold being bare of cooling sections for a distance between 20 and 25 percent of the height of the mold.
Claim 7
Dependent Claim
37 words
The combination of claim 5 in which each of said cooling sections are separate from the others, and said means for introducing a fluid coolant includes a separate feed and a separate control valve to each section.
Claim 8
Dependent Claim
45 words
The combination of claim 6 in which the coolant includes both water and steam, and in which said means for introducing a fluid coolant includes a separate water feed and a separate steam feed to each section, and a separate control valve for each feed.
Claim 9
Dependent Claim
56 words
The combination of claim 6 in which each tubular section comprises a tube wound helically around the mold, the average pitch of the cooling tubes in the top and bottom sections being greater than the average pitch of the tubes in the intermediate section in order to obtain the greater cooling effect in the intermediate section.
Claim 10
Dependent Claim
86 words
The combination of claim 1 in which each tubular section comprises a tube wound helically around the mold, the average pitch of the cooling tubes in the top and bottom sections being greater than the average pitch of the tubes in the intermediate section in order to obtain the greater cooling effect in the intermediate section; and said combination including a covering of heat transfer cement substantially surrounding said tubes, and a stool at the bottom of said mold, said stool being free of cooling sections.
Claim 11
Dependent Claim
84 words
The combination of claim 9 in which there are two intermediate sections, the bottom section covering between 20 and 30 percent of the height of the mold, each of the intermediate section covering between 10 and 20 percent of the height of the mold, the top section covering between 20 and 30 percent of the height of the mold, and the top of the mold being bare of cooling sections for a distance between 20 and 25 percent of the height of the mold.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |