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2. Crucible steel - Wikipedia

   en.wikipedia.org/wiki/Crucible_steel

   The crucible process existed in India at the same time that the west- facing technology was operating in Sri Lanka. [38] Excavations of the Yodhawewa (near Mannar) site (in 2018) have uncovered a lower half of a bottom spherical furnace and crucible fragments used to make crucible steel in Sri Lanka during the 7th-8th centuries AD.

3. Category:Chimneys - Wikipedia

   en.wikipedia.org/wiki/Category:Chimneys

   Articles relating to chimneys, architectural ventilation structures made of masonry, clay or metal that isolate hot toxic exhaust gases or smoke produced by a boiler, stove, furnace, incinerator or fireplace from human living areas.

4. Crucible tongs - Wikipedia

   en.wikipedia.org/wiki/Crucible_tongs

   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.

5. Crucible - Wikipedia

   en.wikipedia.org/wiki/Crucible

   Crucibles are available in several sizes and typically come with a correspondingly-sized lid. [20] When heated over a flame, the crucible is often held inside a pipeclay triangle which itself is held on top of a tripod. Crucibles and their covers are made of heat-resistant materials, usually porcelain, alumina or an inert metal.

6. Crucible Industries - Wikipedia

   en.wikipedia.org/wiki/Crucible_Industries

   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 ]

7. Induction furnace - Wikipedia

   en.wikipedia.org/wiki/Induction_furnace

   The advantage of the induction furnace is a clean, energy-efficient and well-controlled melting process, compared to most other means of metal melting. Most modern foundries use this type of furnace, and many iron foundries are replacing cupola furnaces with induction furnaces to melt cast iron, as the former emit much dust and other pollutants ...