ELECTRIC FURNACE USING BOTH LANTHANUM CHROMITE AND ZIRCONIA FOR HEATING ELEMENT

摘要

PURPOSE: To produce a furnace having a compact structure which makes it unnecessary to take a preheating heater out of the furnace or to use an inner casing. ;CONSTITUTION: Inside a furnace lanthanum chromite heating elements 12 and zirconia heating elements 11 are arranged alternately and at a specific ratio between the numbers of the heating elements. The lanthanum chromite heating elements 12 are used for preheating and up to a temperature range of 1,500 to 1,800°C and the zirconia heating elements 11 are used for heating in a high temperature range of 1,500 to 1,900°C.;COPYRIGHT: (C)1993,JPO&Japio