Proven Equipment for High Temperature Applications Bartlett-Snow™ rotary calciners provide for indirect high temperature processing under oxidizing, reducing, or inert atmospheric conditions. Applications Bartlett-Snow™ rotary calciners provide a highly reliable and effective means of processing a wide variety of fine powders, granular materials, pellets and extrudates that require retention times ranging from a few minutes up to several hours, non-contact with products of combustion, special purge or reactant gases and bed temperature profiling. The Bartlett-Snow™ rotary calciner design consists principally of an inclined rotating cylinder that is enclosed in a furnace along its active length and can be equipped with gas-tight seals that prevent interchange between the internal atmosphere and local ambient conditions. The following list shows the maximum cylinder temperature for the various materials of construction that we offer. Proper selection of the calciner cylinder material is critical and is determined by process temperature, process compatibility and physical size considerations. Metallic Alloys - 1350ºC    Quartz - 1260ºC    Ceramic - 1540ºC    Graphite - 2200ºC Heat for the process is transferred through the cylinder wall, resulting in low internal process gas flow rates. The resulting low gas velocity within the cylinder provides for low levels of attrition and particulate entrainment when processing fragile and micron-sized products. The low flow rate gas conditions within an indirectly heated calciner also provide for a significantly smaller and more economical off-gas handling system, than that required for a direct-fired kiln. In cases where it is necessary to cool the heated material prior to discharge, an integral indirect water spay cooler section can be added to the calciner by extending the length of the cylinder. Bartlett-Snow™ rotary calciners are provided with automatic temperature, pressure and electrical controls with furnaces featuring multiple gas, oil or dual fuel  burners, or electrical heating elements arranged in zones. Bartlett-Snow™ rotary calciners are available in sizes ranging from 6" to 120" in diameter with lengths from 10' to over 100'. Typical Materials Processed »   Activated  Carbon  »   Catalysts »   Ceramic Compounds »   Sludges »   Contaminated Soils »   Ferrites »   Manganese Dioxide »   Metallic Oxides »   Oxides »   Rare Earths »   Tungsten Compounds »   Titanium Oxide »   Uranium Compounds »   Vanadium Compounds »   Zinc Oxides »   Molybdenum Sulfide   › Locate a Salesperson