ALUMINOTHERMIC METHOD FOR OBTAINING METALS, AND MELTING FURNACE FOR ITS IMPLEMENTATION Russian patent published in 2012 - IPC C22C33/04 C21B15/02 

FIELD: metallurgy.

SUBSTANCE: method involves loading of exothermic charge to thin-wall cylinder that is installed beforehand in the shaft of melting furnace coaxially to its perforated walls. Space between thin-wall cylinder and perforated walls of the shaft is filled with granular gas-permeable refractory material; then, thin-wall cylinder is removed, and charge is filled from above with granular gas-permeable refractory material. After that, the beginning of exothermic reaction is initiated, during which gases are released from reaction zone through granular gas-permeable refractory material and perforated walls of the shaft of melting furnace, and after the reaction ends and slag is tapped, furnace is disassembled and ingot is separated from slug residues. On inner surface of housing of melting furnace there fixed is metal mesh, and diameter of thin-wall cylinder from tin is equal to 0.6-0.8 of the housing diameter.

EFFECT: reduction of losses of metal with slag; optimum conditions of metal recovery by increasing the movement rate of reaction zone and separation of the main metal recovery processes from transition of impurities from slag to metal.

2 cl, 4 dwg