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Show V. Immersion-type Holding Crucible Furnace The holding crucible furnace for immersion-type heating was developed to combine the high efficiency of an immersion-type furnace and the economic advantages of a crucible-type furnace. 1. Specifications Table 1 Specifications of Furnace Crucible used #1750 Holding capacity Approx.600kg Burner input 25,000 kcallh Electric heater capacity 6kw Unit heat for holding 21.4 kcal/kg-h 2. Structure Figure 1 shows the structure of this furnace using a flat bottom crucible .. The furnace wall consists of, from the innermost pan, crucible, powdered refractory material, leak detector antenna, and heat insulating material. Even if molten aluminum leaks out of the crucible, refractory prevent leak for some time until the aluminum arrives at the antenna where it is detected electrically. This system is designed to minimize crucible replacement, as well as prevent molten aluminum from getting out of the furnace. 0 a ~ ..!: 1L 'r ~ '- , ~,- ...- ~ Aluminum Refractory material Antenna Burner (Heater) Insulating maLerial Crucible /' Fig. 1 Structure of the Furnace 8 |