| 摘要 |
<p>This invention relates to a cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure, of the type comprising a vertical, cylindrical pressure chamber capable of confining a gas under high pressure, a furnace chamber which is surrounded by a cylindrical heater which supports electrical resistor elements and an insulation, surrounding the furnace chamber and the heater, consisting of a cylindrical, insulating sheath with an insulating lid and bottom. This furnace is characterised in that the heater is built of ceramic elements forming a cylinder with annular channels for electrical resistor elements, and a support insulation, surrounding the ceramic elements and holding them together. The insulation has low gas-permeability and is built up of several layers of a tight felt which is impregnated with a hardening constituent thus achieving bounding between the layers.</p> |
