RU2000125144A - COLD CABLE - Google Patents

Claims (4)

1. Cold crucible, including the bottom and side walls, assembled from copper plates installed with a gap with respect to each other, a vertical partition dividing the volume of the crucible into melting and exhaust chambers interconnected, a cooling system for the said bottom, walls, vertical partition and inductor connected to a power source and mounted around the crucible in the zone of the melt mirror, characterized in that the side walls of the crucible are mounted in height from at least two sections arranged in accordance with the temperature urn zones in the crucible above the melt mirror and along its depth, and the walls of the sections located in different temperature zones have different thicknesses and heights not less than the heights of the indicated temperature zones with the vertical and inclined position of the crucible.  2. The crucible according to claim 1, characterized in that the wall thickness of the section located in the zone of maximum temperatures is 1.5-2.0 mm higher than the wall thickness of the coldest lower section. 3. The cold crucible according to paragraphs. 1 and 2, characterized in that the upper boundary of the walls of the section located in the zone of maximum temperatures corresponds to the boundary of the zone of intense thermal radiation from the mirror of the melt, and the lower boundary of these walls is located below the mirror of the melt at a distance determined by the dependence
h = h ₁ + D • tgα, mm,
where h ₁ - the depth of the layer of superheated metal;
D is the diameter of the crucible;
α is the angle of inclination of the crucible.  4. The cold crucible according to paragraphs. 1-3, characterized in that the inner surface of the side walls of the section located in the zone of maximum temperatures, is covered with a layer of brass.