METHOD FOR THERMAL MELTING OF METAL Russian patent published in 2006 - IPC C22C33/04 

FIELD: metallurgy, in particular, production of metals and alloys by out-of-furnace thermal processing, in particular, melting in hermetically sealed furnace.

SUBSTANCE: method involves preparing burden mixture; charging burden mixture into melting crucible of reaction chamber; creating low pressure in reaction chamber and initiating reaction process; providing melting simultaneously under low pressure in reaction chamber and under pulsing pressure in crucible melting space, said pressure in crucible being created by accumulating and periodic discharging through crucible cover into reaction chamber space of gaseous melting process products. Weight of cover is selected on condition that desirable working pressure may be created in crucible melting space. Melting process is conducted under low pressure of 10^-5 - 600 mm of mercury column in reaction chamber and under gas pressure of 0.1-10 atm in crucible.

EFFECT: increased extraction of metal to be reduced into ingot, improved quality of ready product, decreased consumption of reducer, and also wider operational capabilities of thermal melting process in hermetically sealed chamber.

3 cl, 1 ex