US Pat. No. 9,476,645

OPEN BOTTOM ELECTRIC INDUCTION COLD CRUCIBLE FOR USE IN ELECTROMAGNETIC CASTING OF INGOTS

CONSARC CORPORATION, Ran...

1. An open bottom electric induction cold crucible for electromagnetic casting, the open bottom electric induction cold crucible
comprising:
a crucible volume into which a charge can be fed for inductive heating and melting, and subsequent solidification within the
crucible volume to form an ingot at an open bottom of the open bottom electric induction cold crucible, the crucible volume
formed from an electrically conductive, water-cooled and slot-segmented wall, the electrically conductive, water-cooled and
slot-segmented wall having a continuous, electrically conductive and non-slotted perimeter wall region at the open bottom
of the open bottom electric induction cold crucible;

an upper and a lower induction coil arranged adjacent to each other and surrounding a portion of the height of the crucible
volume to inductively heat and melt the charge in the crucible volume when an alternating current flows through the upper
and the lower induction coils, the upper and the lower induction coils being separated from each other by an inter-coil magnetic
shield; and

a bottom electrically conductive magnetic shield disposed around the outer perimeter of the electrically conductive, water-cooled
and slot-segmented wall in a crucible bottom region adjacent to the continuous, electrically conductive and non-slotted perimeter
wall region.

US Pat. No. 9,332,594

ELECTRIC INDUCTION MELTING ASSEMBLY

CONSARC CORPORATION, Ran...

1. An electric induction melting assembly for use in a controlled environment chamber, the electric induction melting assembly
comprising:
an induction melting furnace comprising:
at least one furnace induction coil power lead from one or more induction coils surrounding a crucible of the induction melting
furnace; and

at least one furnace spade assembly, each of the at least one spade assembly comprising:
a pressure plate attached to the induction melting furnace, the pressure plate having a pressure plate opening to a controlled
environment in the controlled environment chamber;

a furnace spade power port sealing the pressure plate opening; and
at least one positive furnace electrical spade and at least one negative furnace electrical spade protruding through the furnace
spade power port, the at least one furnace induction coil power lead connected to the at least one positive furnace electrical
spade and the at least one negative furnace electrical spade on a side of the pressure plate in the controlled environment;

and
a cradle for seating of the induction melting furnace within the controlled environment chamber, the cradle comprising:
at least one external electric power port;
at least one cradle spade assembly, the at least one cradle spade assembly disposed within an interior cradle volume within
the cradle, the interior cradle volume having a furnace electrical spades opening, the at least one cradle spade assembly
having at least one positive cradle electrical spade and at least one negative cradle electrical spade, the at least one positive
and negative electrical spades connected to the at least one external electric power port within the interior cradle volume;
and

at least one spade clamping assembly, the at least one spade clamping assembly disposed within the interior cradle volume
and having an opened position and a closed position, the at least one spade clamping assembly comprising at least one positive
cradle clamping electrical spade and at least one negative cradle clamping electrical spade, and an actuator for moving the
at least one positive cradle clamping electrical spade and the at least one negative cradle clamping electrical spade between
the opened and closed positions, the at least one positive cradle clamping electrical spade and the at least one negative
cradle clamping electrical spade disposed respectively on opposing sides of the at least one positive cradle electrical spade
and at the least one negative cradle electrical spade so that when the induction melting furnace is seated on the cradle the
pressure plate is sealed over the furnace electrical spades opening and the at least one positive and negative furnace electrical
spades protrude into the interior cradle volume a sealed cradle environment is formed within the interior cradle volume, the
sealed cradle environment isolated from the controlled environment within the controlled environment chamber, whereby when
the at least one spade clamping assembly is in the closed position the at least one positive cradle clamping electrical spade
and the at least one negative cradle clamping electrical spade respectively complete an electrical circuit between (1) each
of the at least one positive furnace electrical spades and each of the at least one positive cradle electrical spades and
(2) each of the at least one negative furnace electrical spades and each of the at least one negative cradle electrical spade
in the sealed cradle environment.

US Pat. No. 9,340,896

PURIFICATION OF A METALLOID BY CONSUMABLE ELECTRODE VACUUM ARC REMELT PROCESS

CONSARC CORPORATION, Ran...

1. A method of producing a silicon ingot from a silicon electrode in a CEVAR purification process performed in a short CEVAR
open-bottomed crucible disposed in a CEVAR furnace, the method comprising:
heating the silicon electrode to a heated temperature below the melting point of the silicon electrode prior to initiation
of the CEVAR purification process to form a preheated silicon electrode having a CEVAR process resistivity;

melting the preheated silicon electrode by the CEVAR purification process for formation of a silicon ingot at an elevated
temperature at the open bottom of the short CEVAR opened-bottomed crucible;

passing the silicon ingot at the elevated temperature through a heating system adjacent to the short CEVAR open-bottomed crucible;
and

regulating the heating system to provide a temperature-controlled thermal environment for the silicon ingot at the elevated
temperature as the silicon ingot exits the short CEVAR open-bottomed crucible to cool the silicon ingot without cracking.

US Pat. No. 10,433,374

ELECTRIC INDUCTION MELTING ASSEMBLY

CONSARC CORPORATION, Ran...

1. A method of operation of an induction melting furnace removably installed in a cradle disposed in a controlled environment within a controlled environment chamber, the induction melting furnace having one or more furnace coil power leads from one or more furnace induction coils of the induction melting furnace to at least one positive furnace electrical spade comprises a plurality of said at least one positive furnace electrical spade, and at least one negative furnace electrical spade comprises a plurality of said at least one negative furnace electrical spade disposed in a furnace spade power port sealably attached to a pressure plate on the induction melting furnace with the at least one positive furnace electrical spade and the at least one negative furnace electrical spade penetrating through the pressure plate, the method comprising:seating the induction melting furnace on the cradle prior to establishing the controlled environment within the controlled environment chamber so that the pressure plate forms a seal over a furnace electrical spades opening in an interior cradle volume of the cradle with the at least one positive furnace electrical spade and the at least one negative furnace electrical spade penetrating into a sealed interior cradle environment in the interior cradle volume, the interior cradle volume containing a cradle spade assembly and a spade clamping assembly;
forming the controlled environment within the controlled environment chamber subsequent to seating the induction melting furnace on the cradle to isolate the sealed interior cradle environment from the controlled environment; and
moving at least one positive cradle clamping electrical spade comprises a plurality of said at least one positive cradle clamping electrical spade, and at least one negative cradle clamping electrical spade comprises a plurality of said at least one negative cradle clamping electrical spade from an opened position to a closed position within the sealed interior cradle environment to complete an electrical circuit between (1) said each of the at least one positive furnace electrical spades protruding through the pressure plate into the sealed interior cradle environment and said each of the at least one positive cradle clamping electrical spades associated with the cradle spade assembly, said each of the at least one positive cradle clamping electrical spades connected to a positive terminal of an external power source located external to the controlled environment and supplied to the sealed interior cradle environment, and (2) said each of the at least one negative furnace electrical spades protruding through the pressure plate into the sealed interior cradle environment and said each of the at least one negative cradle clamping electrical spades associated with the cradle spade assembly, said each of the at least one negative cradle clamping electrical spades connected to a negative terminal of the external power source, whereby electric power from the positive terminal and the negative terminal of the external power source is provided to the one or more furnace induction coils.