GB1281720A - A method of improving vacuum treatment of liquid metal - Google Patents
A method of improving vacuum treatment of liquid metalInfo
- Publication number
- GB1281720A GB1281720A GB3689569A GB3689569A GB1281720A GB 1281720 A GB1281720 A GB 1281720A GB 3689569 A GB3689569 A GB 3689569A GB 3689569 A GB3689569 A GB 3689569A GB 1281720 A GB1281720 A GB 1281720A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- ladle
- liquid metal
- vacuum treatment
- july
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1281720 Vacuum degassing apparatus NIPPON KOKAN K K 22 July 1969 [23 July 1968] 36895/69 Heading C7D Metals are degassed by a vacuum treatment comprising inducing liquid metal into a vacuum chamber from a ladle via an induction pipe extending downwardly from said chamber into said metal, injecting an inert gas into said metal in said ladle from a point immediately below the end of the induction pipe at a pressure P o defined by: P A + pH 1 max >P o >P A + pH 1 min where P A is atmospheric pressure, p is the density of the metal, and H 1 max and H 1 min are the depths of metal in the ladle before and after the induction, and returning the metal to the ladle. In a modification, the process is a circulation degassing (R-H) process, and P o is defined by 3 (P A + pH) # P o # 1À05 (P A + pH) where H is the height of liquid metal in the ladle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5160168 | 1968-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1281720A true GB1281720A (en) | 1972-07-12 |
Family
ID=12891406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3689569A Expired GB1281720A (en) | 1968-07-23 | 1969-07-22 | A method of improving vacuum treatment of liquid metal |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1937475A1 (en) |
| FR (1) | FR2013546A1 (en) |
| GB (1) | GB1281720A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983000878A1 (en) * | 1981-08-28 | 1983-03-17 | Nippon Steel Corp | Process for manufacturing steel for isotropic silicon steel plate |
| CH706331B1 (en) | 2011-01-28 | 2015-09-15 | Univ Dresden Tech | Coiling and twisting device of a ring spinning or ring twisting machine. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU36886A1 (en) * | 1958-05-22 | |||
| FR1359312A (en) * | 1963-03-14 | 1964-04-24 | Siderurgie Fse Inst Rech | Improvements to the degassing processes of molten metals |
-
1969
- 1969-07-22 GB GB3689569A patent/GB1281720A/en not_active Expired
- 1969-07-23 DE DE19691937475 patent/DE1937475A1/en active Pending
- 1969-07-23 FR FR6925112A patent/FR2013546A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1937475A1 (en) | 1970-03-26 |
| FR2013546A1 (en) | 1970-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |