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Crucible tongs are used most often with crucibles, small ceramic or metal vessels used to heat chemicals to temperatures up to 565.56 degree Celsius. [3]As a crucible will be very hot when heating it in a furnace or a Bunsen burner, one cannot hold the crucible directly.
Tongs in which the pivot or joint is placed close to the gripping ends are used to handle hard and heavy objects. Driller's round tongs, blacksmith's tongs or crucible tongs are of this type. A myth contained in the classical Jewish text Pirkei Avot states that the first pair of tongs was created by God right before God rested on the Seventh ...
The teapot spout design, like a teapot, takes liquid from the base of the ladle and pours it out via a lip-pour spout. Any impurities in the molten metal will form on the top of the metal so by taking the metal from the base of the ladle, the impurities are not poured into the mould. The same idea is behind the bottom pour process.
A forge is the traditional metalsmith's hearth for heating metal while forging Soaking pits are large heated chambers, typically in-ground, where steel slabs are reheated before rolling Another class of furnaces isolate the material from the surrounding atmosphere and contaminants, enabling advanced heat treatments and other techniques:
The flux is molten in a highly stable crucible that does not react with the flux. Metal crucibles, such as platinum , titanium , and niobium are used for the growth of oxide crystals. Ceramic crucibles, such as alumina , zirconia , and boron nitride are used for the growth of metallic crystals. [ 2 ]
Metal-shaping factories across the country depended on cutting tools made of crucible steel through the 1920s, when electric steel furnaces gained prominence." [ 14 ] Three companies which merged to form Crucible into the largest U.S. crucible-steel-producing company were: [ 10 ] [ 15 ]