preheating furnace / regeneration / melting / holding
Schaefer Group

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Characteristics

  • Function:

    preheating, regeneration, melting, holding

  • Configuration:

    chamber

  • Heat source:

    gas

  • Other characteristics:

    for aluminum

  • Maximum temperature:

    Max.: 982 °C (1,800 °F)

    Min.: 0 °C (32 °F)

Description

For fuel efficiency like no other; gas, oil or propane aluminum furnaces by The Schaefer Group hit the mark. Typical melting efficiency, based on 100% cold charging with an exterior charge well, is 1.5 CF of gas per pound (378 kcal/0.4536 kg) of metal in a Schaefer furnace radiant roof-fired reverb. Whatever the fuel, this is only 1,500 BTU per pound (378 kcal/0.4536 kg). And, if you preheat at least 50% of the metal charged in the form of ingot or sows, the number drops to 1.2 CF of gas (302.4 kcal/0.4536 kg). Batch-type melting reverbs are also available with the latest in high velocity burners.
ADVANTAGES:

Clean Metal – non-wetting refractory linings will not contaminate the metal.
Excellent Temperature Control – Filtration is optional.
Clean Furnace – all blind corners are eliminated and door jambs are tangent with the walls for full accessibility. A clean-out-door provides easy access to the hearth and allows easy clean-up of the furnace bottom or to skim the bath.
Liquid Metal Deliveries – Schaefer reverbs can be engineered with large holding capacities that offer enough “draw-down” capability to accept molten metal delivery.
Regeneration & Recuperation (explained under Operation & Maintenance) – improve melting efficiency even more by preheating the ambient air and metal through a combination of pre-heat hearths, regeneration and recuperation. Melt rates of 950-to-1,000 BTU/lb (239.4-to-252 kcal/0.4536 kg) can be obtained with the right combination of equipment.