12 | THESCHAEFERGROUP.COM Schaefer is a pioneer in the design and installation of degassing solutions. Our degassing solutions include porous plus technology, rotary sparging gas nozzles and degassing lances. ADVANTAGES: • Reduce Hydrogen — to eliminate impurities to produce clean metal. • Reduce Porosity — to make stronger parts. • Reduce Inclusions — to make better surfaces. FOR: Schaefer provides degassing systems for a variety of metal casters, high and low pressure die casters, and permanent mold, sand, investment and lost foam foundries around the world. Crucible Pot-type Furnaces Electric crucibles are used for melting or holding and are popular furnaces as they deliver exceptional efficiency. Completely covered, they use only 0.20 to 0.25 KW/hr per lb to melt cold metal and just 3 to 4 KW/hr to hold 1,000 lbs of molten aluminum at 1,220 degrees Fahrenheit. A built-in leak detector sounds an alarm if the silicon carbide crucible should ever leak. Electric crucibles use less energy than channeltype induction furnaces, and they provide more accurate temperature control. Both manual and power-operated tilt-type versions are also available. Crucible furnaces are very compact and only require a small space to operate, and are a perfect companion in a complete Schaefer system of furnaces for a die casting, permanent mold or sand foundries. Gas, oil or propane crucible, or pot-type furnaces are available with many of the same features as the electric models: ceramic fiber lining, exceptional long life, compactness, comfort, low maintenance and easy installation. Gas models require only 3 CF of gas (3,000 BTU) or less per pound of metal melted. Our unique single or double fossil fuel firing and fluing capabilities provide great performance. Close temperature control, rapid melting and leak detectors are all features that enhance the cost efficiencies of these furnaces. ADVANTAGES: • High Temperature Ceramic Fiber Lining — for walls, floor and top provide excellent insulation, low heat storage, and means it is cool to work near. It cannot be thermal shocked, which means it can rapidly be brought online or taken offline. • Quiet operation • Solid-state Controls — reliable, fullproportioning control system continuously meters in only the amount of power required at any given time. • Easy Installation and Maintenance — easily connect the straight resistive electrical load in either single or three phase primary electric service. • Long Service Life — depending on the ratio of melting to hold time, the silicon carbide crucible will outlast those in gas and oil-fired furnaces. The heavy duty electrical resistance heating elements usually deliver one to five years of service, and the lining will last even longer.
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