MELTING CRUCIBLE OF VACUUM AERIAL SKULL FURNACE AND SKULL FIRING METHOD Russian patent published in 2021 - IPC C22B9/22 

FIELD: metallurgy.

SUBSTANCE: invention relates to a melting crucible of a vacuum arc erosion furnace for melting of ingots of high-melting and highly reactive metals and alloys, mainly titanium. Melting crucible contains metal water-cooled housing with embedded rod with electrode holder for scull, which is consumable electrode, consisting of rear wall with embedded wall, bottom, side walls, front wall with drain tip, embedded block, which includes embedded rod, embedded plate arranged on inner surface of rear wall of crucible, and embedded wall made integral with embedded plate, wherein the embedded plate is made in the form of an internal crucible cross-section from an alloy similar in chemical composition to the remelted alloy, wherein in the embedded plate there is a central hole for placement of the embedded rod, and on the end face of the embedded rod there is a thrust ledge for pressing the embedded plate to the back wall of the crucible and fixing it on the embedded core of the crucible during sculling. Thrust ledge at the end of the embedded rod is made in the form of a cylindrical collar, wherein the through hole in the embedded plate is made so that its longitudinal axis is maximally close to the coordinates of the centre of gravity of the volumetric body, consisting of an embedding unit and skewed to it, which is consumable electrode and installed during subsequent melts into vertical position in holder of electric holder. Lugs for interaction with hoisting-and-conveying device are made on upper edge of embedded block. Before placement of embedded rod in crucible assembly of embedded block is performed by means of installation of embedded rod into hole of embedded plate and placement of embedded block in melting pot, and after the insert is melted, the block is removed from the crucible and used in subsequent melts of similar alloy. Labels are applied to the side surface of the embedded plate to control the consumable electrode-slabs balance.

EFFECT: reduced cost of products due to reduced consumption of embedded rods, elimination of surfacing, high safety of melting ingots of high-melting and high-reaction metals and alloys, mainly titanium, due to minimizing risks of spilling melt beyond the crucible.

5 cl, 2 dwg