Immersion and vaporization chamber
AssigneeGeorge Fischer Ltd.
InventorHans Lustenberger
Life of this patent
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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.
Claims19
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.
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.
Dependencies are inferred from the claim text.