Immersion and vaporization chamber

• US 4,496,393 A
• Filed: 01/07/1983
• Issued: 01/29/1985
• Est. Priority Date: 05/08/1981
• Status: Expired due to Fees

• Current Assignee: George Fischer Incorporated (Georg Fischer AG)
• Original Assignee: George Fischer Incorporated (Georg Fischer AG)
• Inventors: Lustenberger, Hans
• Primary Examiner(s): Rutledge, L. Dewayne
• Assistant Examiner(s): McDowell, Robert L.
• Application Number:
  US06/459,539
• Time in Patent Office: 753 Days
• Field of Search: 266/216, 75/130 B, 75/130 A, 75/58
• US Class Current: 75/304
• CPC Class Codes: C21C 1/02 Dephosphorising or desulfurising
• CPC Class Codes: C21C 1/10 Making spheroidal graphite cast-iron
• CPC Class Codes: C21C 7/00 Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 treating molten metals during moulding B22D1/00, B22D27/00; remelting ferrous metals C22B

Abstract

A plunging capsule for introducing a highly volatile, vaporizable additive, such as pure magnesium, into a metal melt in a treatment vessel comprises a wall oriented vertically in an operating position of the capsule. The wall has an upper portion forming two-thirds of the wall and a lower portion forming one-third of the wall, and defines a chamber for the additive. At least one outlet opening is provided in the upper portion. At least one inlet opening is provided in the lower portion. The transverse cross-sectional area of the inlet opening is less than that of the outlet opening.

Claims

1. A plunging capsule for introducing a highly volatile, vaporizable additive, such as pure magnesium, into a pig iron, cast iron or cast steel melt in a treatment vessel for desulfurization or production of nodular graphite iron, vermicular graphite iron or magnesium treated cast iron, the capsule comprising:

a wall oriented vertically in an operating position of the capsule, and having an upper portion forming two-thirds of said wall and a lower portion forming one-third of said wall, said wall defining a chamber for the additive;

at least one outlet opening in said upper portion having a first transverse cross-sectional area; and

at least one inlet opening in said lower portion having a second transverse cross-sectional area, said second transverse cross-sectional area being less than said first cross-sectional area.

2. A plunging capsule according to claim 1 wherein

3. A plunging capsule according to claim 1 wherein a holding and filling pipe is coupled to and projects upwardly from said wall, said pipe being sealed to said wall and forming a pressure tight closure for said chamber.

4. A plunging capsule according to claim 3 wherein said pipe is coated interiorly and exteriorly with ceramic material.

5. A plunging capsule according to claim 3 wherein said pipe comprises ceramic material.

6. A plunging capsule according to claim 1 wherein the capsule comprises first and second parts and means for coupling said parts after one of said parts has been filled with the additive.

7. A plunging capsule according to claim 1 wherein holding means is attached to said wall by coupling means for supporting said wall in the treatment vessel, said coupling means releasing said wall from said holding means upon complete vaporization of the additive.

8. A plunging capsule according to claim 1 wherein said wall reacts with the melt to disintegrate upon complete vaporization of the additive.

9. A plunging capsule according to claim 1 wherein said chamber is elliptical in horizontal section.

10. A plunging capsule according to claim 9 wherein said chamber is elliptical in vertical section.

11. A plunging capsule according to claim 1 wherein said chamber is elliptical in vertical section.

12. A plunging capsule according to claim 1 wherein said openings are arranged in an irregular manner in said wall.

13. A plunging capsule according to claim 1 wherein said openings are symmetrically arranged in said wall.

14. A plunging capsule according to claim 1 wherein said transverse cross-sectional area of each of said openings is between 1 cm² and 100 cm².

15. A plunging capsule according to claim 1 wherein

16. A plunging capsule according to claim 1 wherein support means are coupled to said wall for rotating said wall about a vertical axis in the treatment vessel.

17. A plunging capsule according to claim 16 wherein said support means includes means for moving said wall in a pulsating manner.

18. A plunging capsule according to claim 1 wherein support means are coupled to said wall for moving said wall in a pulsating manner.

19. A process for introducing magnesium into pig iron, cast iron or cast steel melt in a treatment vessel for desulfurization or production of nodular graphite iron, vermicular graphite iron or magnesium treated cast iron, comprising the steps of:

filling a chamber of a capsule with liquid magnesium, the capsule having a vertical wall with an upper portion forming two-thirds of the wall and a lower portion forming one-third of the wall, an outlet opening in the upper portion with a first transverse cross-sectional area and a inlet opening in the lower portion with a second transverse cross-sectional area less than the first transverse cross-sectional area;

solidifying the magnesium; and

submerging the capsule filled with solidified magnesium into the melt in the treatment vessel.