FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy. Disc blank is placed on the mould to fuse it by inductor at retaining the blank side surface in suspended state. Mould top part is shaped to truncated cone while mould bottom features the same cone but continued to geometrical cone vertex. Conical insert made from pre-purified metal is fitted in cavity between said disc and said mould to close the mould inlet. Blank is fused from periphery to form the conical front. All light inclusions are displaced to cone vertex while heavy inclusions are collected at cone bottom to get frozen in wall accretion. At bottom drain, pure melt only flows in the mould while dirty melt stays on the mould which is detached after production of the ingot.
EFFECT: higher quality of metal owing to deep refining.
3 cl, 7 dwg
