• Metallurgia

Fluidised bed furnaces

Metallurgia offers fluidised bed furnace for heat treatment of tools & dies. These are both technologically advanced and simple in design and operation. The bed itself is actually a retort filled with small aluminium oxide particles. When air is uniformly passed up through the retort, the particles microscopically separate and begin to move in the retort. The bed takes on fluid-like characteristics. In appearance the bed looks like a container of boiling liquid, and the particles flow to uniformly surround any object immersed in it. When a source of heat (electric) is added through the retort wall, the fluidised bed becomes a heat treating furnace. Highlights: high heat transfer rate, temperature uniformity and buoyancy of fluidised bed furnaces ensure quick, uniform and distortion free processing of tools and dies; high heat transfer rate shortens cycle times and packs in more batches per day; between batches the furnace can be switched off; when this is done, even overnight, the bed retains a major portion of the heat and needs only incremental heating the next day, resulting in low processing costs; operation is are clean and does not attract provisions of health and pollution laws, also problems of toxic waste disposal, pre and post treatment cleaning are eliminated; and can operate at any temperature up to its rated limit.