METHOD FOR PURIFYING COPPER OR NICKEL ALLOYS OR COPPER, AND PLANT FOR METHOD'S IMPLEMENTATION Russian patent published in 2013 - IPC C22B9/04 C22B15/14 

FIELD: metallurgy.

SUBSTANCE: invention proposes a purifying method of copper or nickel alloys or copper, which contain lead and/or zinc, and is characterised by the fact that melting of the above alloy or metal is performed in a melting furnace with its overheating. The, molten metal is supplied to a vacuum chamber, from which air evacuated, vacuumised and exposed in the vacuum chamber. Then, vacuum is released and an alloy or copper billet is drawn through a crystalliser interconnected with the melting furnace. Zinc and lead impurities removed during molten metal vacuumising are supplied to a condenser, in which they are sprinkled with molten lead supplied from the bath, and lead and/or zinc billets are drawn through crystallisers interconnected with the lead and zinc bath. For vacuumising of molten metal and its exposure, the vacuum chamber is isolated from action of ambient air through a refractory layer of the chamber by separating the refractory layer at the vacuum chamber inlet into two parts, one of which is represented by a lower part located before the vacuum chamber inlet, which is permeable for atmospheric air. The second part represents an upper part of the refractory layer, which is impermeable for atmospheric layer and located in the vacuum chamber above the line located in the part of the refractory layer, in which pressure of alloy or copper is equal to or higher than atmospheric one art full vacuum. A plant for the method's implementation is proposed as well.

EFFECT: improving quality and increasing the purifying rate of alloys and metal; simplifying the plant design.

2 cl, 3 dwg