METHOD OF ELECTRON BEAM REMELTING OF LUMP METALLIC MATERIAL AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1997 - IPC

FIELD: special electrometallurgy; applicable in production of ingots and slabs from alloys and metals including high-melting and reactive ones. SUBSTANCE: the offered method includes supply of material for melting, heating, predegassing, evaporation of volatile components, and melting at constant power of electronic heating and also pouring of liquid metal to next operation, for instance, into intermediate vessel for refining mold or ingot mold for formation of ingot. In so doing, remelted material us supplied to feeder rotating about its axis and whose internal surface is heated, with predegassing and evaporation of volatile components, material melting and discharge from the feeder of produced liquid metal for next operation. The device for embodiment of the offered method has vacuum melting chamber with electron guns, unit for supply of lump metallic material for melting and receiver of liquid metal for performance of next operation, for instance, intermediate vessel for refining, mold or ingot mold for ingot formation. Installed between unit supplying lump material for melting and receiver is feeder rotating about its axis and made of hollow truncated cone whose rotation axis is inclined to plane of metal surface in receiver through an angle which is larger than half of angle of cone vertex forming internal surface of feeder so that cone small base faces receiver and serves as discharge opening whose diameter is equal or smaller than maximum cross-section of receiver and large base faces the device for supply of lump metallic materials and serves as receiving opening whose diameter is larger than, or equal to, maximum lumps of remelted material. Value of angle is taken from relation ctn < K, where K is coefficient of friction of lump metallic material against feeder internal surface. EFFECT: higher efficiency. 6 cl, 2 dwg, 1 tbl