Apparatus for bottom casting metal ingots
AssigneeJones & Laughlin Steel Corporation
InventorsCharles C. Gerding, Joseph M. Stoll, Harold L. Majors
Life of this patent
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Abstract
Nozzle apparatus and method for controlling molten metal flow in a bottom pour casting system whereby a fluid passage is defined wherein the flow is controlled to minimize splashing of the molten metal in the molds and the flow distribution is better equalized among a plurality of molds which are being simultaneously charged.
Claims9
In bottom pouring apparatus wherein a plurality of upstanding ingot molds are simultaneously charged with molten steel in the absence of separate fluid pressure means through discharge ports of runners leading to the molds, the improvement wherein the molten steel flowing into each of said molds flows through a respective refractory nozzle leading from a discharge port of the runner over which the nozzle is mounted and wherein said nozzle includes:
- (a) a fluid passage therethrough;
- (b) means defining a first cavity having a bottom side forming an inlet port for said passage, said inlet port having a lateral cross-section larger than the discharge port of said runner;
- (c) means defining a second cavity having an inlet side of less cross-sectional lateral area than and communicating with said first cavity whereby a constriction smaller than the discharge port of said runner is formed in said passage;
- and
- (d) means defining a third cavity communicating with said second cavity, expanding within said nozzle the lateral cross-section of the passage from said second cavity and forming a top side outlet for said passage into the mold;
- and
- wherein:
- said nozzle is positioned in the bottom wall of the mold.
In bottom pouring apparatus wherein a plurality of upstanding molds are simultaneously charged with molten steel through discharge ports or runners leading to the molds, the improvement wherein the molten steel flowing into each of said molds flows through a respective refractory nozzle leading from a discharge port of the runner over which the nozzle is mounted and wherein said nozzle includes:
- (a) a fluid passage therethrough;
- (b) means defining a first cavity having a bottom side forming an inlet port for said passage, said inlet port having a lateral cross-section larger than the discharge port of said runner;
- (c) means defining a second cavity having an inlet side of less cross-sectional lateral area than and communicating with said first cavity;
- (d) means defining a third cavity having a less cross-sectional lateral area than and communicating with said second cavity whereby a constriction smaller than the discharge port of said runner is formed in said passage;
- and
- (e) means defining a fourth cavity communicating with said third cavity, expanding within said nozzle the lateral cross-section of the passage from said third cavity and forming a top side outlet for said passage into the mold.
Dependencies are inferred from the claim text.