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Multiple Hearth Furnace
A sketch of a Herreshoff multiple-hearth furnace, 400x400px A multiple hearth furnace also known as a vertical calciner, is used for continuous preparation and calcining of materials. Working The multiple hearth furnaces consist of several circular hearths or kilns superimposed on each other. Material is fed from the top and is moved by the action of rotating "rabble arms", and the revolving mechanical rabbles attached to the arms move over the surface of each hearth to continuously shift the ore. The arms are attached to a rotating central shaft that passes through the center of the roaster. As the material is moved, the ore that is charged at the top hearth gradually moves downward as it passes through windows in the floor of each hearth or through alternate passages around the shaft and the periphery until it finally emerges at the bottom. Gas The oxidizing gases flow upward, i.e., counter-current to the descending charge. In a well-insulated roaster, external heating is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herreshoff Multiple-hearth Furnace (scheme)
Herreshoff may refer to: * Herreshoff (surname), a German surname * Herreshoff (automobile), any of three models of automobile built by the U.S. manufacturer Herreshoff Motor Company, 1909–14 * ''Herreshoff Bull's Eye'' * Herreshoff Castle, an unusual residence in Marblehead, Massachusetts * Herreshoff family * Herreshoff Marine Museum * USS Herreshoff No. 306 (SP-1841), USS ''Herreshoff'' No. 306 (SP-1841) * USS Herreshoff No. 308 (SP-2232), USS ''Herreshoff'' No. 308 (SP-2232) * USS Herreshoff No. 309 (SP-1218), USS ''Herreshoff'' No. 309 (SP-1218) * USS Herreshoff No. 321 (SP-2235), USS ''Herreshoff'' No. 321 (SP-2235) * USS Herreshoff No. 322 (SP-2373), USS ''Herreshoff'' No. 322 (SP-2373) * USS Herreshoff No. 323 (SP-2840), USS ''Herreshoff'' No. 323 (SP-2840) * Herreshoff 31, ''Herreshoff'' 31 * Herreshoff 12½, ''Herreshoff'' 12½ {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |