| 摘要 |
A four-section type combined crucible made from a carbon material comprises a carbon-carbon crucible (4) and a graphite crucible (5). The carbon-carbon crucible (4) consists of an upper carbon-carbon crucible section (1), a middle carbon-carbon crucible section (2), and a lower carbon-carbon crucible section (3), and through holes of which the hole diameters are 3-30 mm are respectively and uniformly distributed in the circumferential directions of the upper carbon-carbon crucible section (1), the middle carbon-carbon crucible section (2), and the lower carbon-carbon crucible section (3). The combined crucible of the utility model has a simple structure and is convenient to operate; damage to the combined crucible can be effectively alleviated when a residual body of a quartz crucible is removed, and the service life of the combined crucible is prolonged; in addition, the through holes are respectively and uniformly distributed in the circumferential directions of the upper carbon-carbon crucible section (1), the middle carbon-carbon crucible section (2), and the lower carbon-carbon crucible section (3), so that the transfer of radiant heat is facilitated, and the utilization rate of energy is increased. |
