Claims
- 1. An apparatus for treating molten metal at atmospheric pressure with a volatile additive producing a violent reaction when contacted by the molten metal, for use with a vertically elongated single walled treating ladle having a cylindrical inner wall and floor defining a treating chamber and having a top opening surrounded by an annular rim, comprising,
- a vertically movable inner hood having a circular base for seating on said rim to contain the escape of molten metal but to allow the escape of gases therefrom during the reaction and provided with a central opening,
- a vertically movable open-topped outer hood outwardly spaced from and surrounding and extending upwardly from the inner hood and connected to the lower part of it to intercept slopped molten products and to conduct gases escaping from the ladle,
- a stationary exhaust duct outwardly spaced from and surrounding the outer hood and extending upward therefrom to receive from it gases escaping from the ladle,
- a vertically movable support member spaced above the inner hood and connected thereto whereby, when the support member is raised and lowered, the inner and outer hoods are raised and lowered with it,
- a stocky plunging rod of solid heat-resistant non-metallic non-wetting material non-consumable in the reaction of a cross sectional size slightly less than that of said opening in the inner hood and extending therethrough,
- an overall cylindrical self-contained capsule removably mounted on the lower end of the plunging rod and having an integral floor and sidewall of heat-resistant non-metallic non-wetting material non-consumable in the reaction defining an addition-receiving chamber, the sidewall extending upward from the bottom wall to an open top surrounded by a terminal collar part connectably received by the end of the solid plunging rod to close the open top, said sidewall being provided with a restricted access passage sized to receive individual solid shaped pieces of additive and to permit controlled ingress of molten metal and controlled escape of reaction products, the bottom wall being provided with a central restricted passage sized to bar escape of said solid shaped pieces and to permit controlled ingress of molten metal and controlled escape of reaction products,
- the inner hood having a cover assembly including a refractory lined cover to overlie the opening of and engage the rim of the ladle and an adjoining skirt for surrounding the top margin of the side of the ladle, the cover assembly including downwardly extending means for engaging the wall of the ladle, the cover assembly having a central opening defining a passage for the plunging rod limiting its sideways movement against the force of the reaction,
- means for raising and lowering said support member to cap and uncap the ladle and for moving the capsule into ready position above the molten metal and for withdrawing it therefrom,
- a cylinder on said support member and a piston rod extending downward therefrom to a connection with said plunging rod for raising and lowering it independently of the hood for plunging the capsule into the molten metal from ready position and withdrawing it thereto.
- 2. An apparatus, as defined in claim 1, including,
- a mounting device for a plunging rod of the type described, comprising,
- an adapter having a base plate provided with a socket for receiving the end of an elevating rod extending upwards therefrom,
- a boss extending downwards from said plate and having a recess for receiving a connector from the rod,
- a bracket slidably seated on the base plate and having a fixed connection to the adapter,
- and means for clamping the plate and bracket together to prevent their relative movement.
- 3. A mounting device, as defined in claim 2, wherein,
- a mounting bolt has a head locked into said recess and a threaded shank extends downwardly from the head for engagement with the top of said elevating rod.
- 4. An apparatus, as defined in claim 1, in which the rod is a stocky rod made of graphite and the container is a capsule of graphite.
- 5. An apparatus, as defined in claim 4, in which the capsule has a tapped top opening and the plunging rod has a bottom threaded end engaging in said opening.
- 6. An apparatus, as defined in claim 1, in which the downwardly extending means on the cover assembly includes an annular splash guard and a ring extending outwardly therefrom for engaging the wall of the ladle.
Priority Claims (1)
Number |
Date |
Country |
Kind |
269973 |
Jan 1977 |
CAX |
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Parent Case Info
This is a Division of application Ser. No. 806,094 filed June 13, 1977, now U.S. Pat. No. 4,199,353.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1410157 |
Oct 1975 |
GBX |
Non-Patent Literature Citations (1)
Entry |
E. Modl, "Comparing Processes for Making Ductile Iron," Foundry (Jul. 1970). |
Divisions (1)
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Number |
Date |
Country |
Parent |
806094 |
Jun 1977 |
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