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  2. Acheson process - Wikipedia

    en.wikipedia.org/wiki/Acheson_process

    To finish the items, the process is run for approximately 20 hours at 200 V with a starting current of 300 A (60 kW) for a furnace approximately 9 meters long by 35 cm in width and 45 cm in depth, and the resistance drops as the carbon heats due to a negative temperature coefficient, causing the current to increase. [2] Cool down takes weeks.

  3. Graphitization - Wikipedia

    en.wikipedia.org/wiki/Graphitization

    Graphitization generally occurs at high temperatures (up to 3,000 °C (5,430 °F)), and can be accelerated by catalysts such as iron or nickel. [ 2 ] When carbonaceous material is exposed to high temperatures for an extended period of time, the carbon atoms begin to rearrange and form layered crystal planes.

  4. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    The burner in the vertical, cylindrical furnace as above, is located in the floor and fires upward. Some furnaces have side fired burners, such as in train locomotives. The burner tile is made of high temperature refractory and is where the flame is contained. Air registers located below the burner and at the outlet of the air blower are ...

  5. Regenerative heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Regenerative_heat_exchanger

    For example, a blast furnace may have several "stoves" or "checkers" full of refractory fire brick. The hot gas from the furnace is ducted through the brickwork for some interval, say one hour, until the brick reaches a high temperature. Valves then operate and switch the cold intake air through the brick, recovering the heat for use in the ...

  6. Waterside hot water hay pellet furnace - Wikipedia

    en.wikipedia.org/wiki/Waterside_hot_water_hay...

    The temperature in the water chamber of the furnace can reach the boiling point within seven minutes, and at that rate, the furnace can burn off the majority of the ash and leave little waste. [4] Once development was complete on the furnace, the final working prototype of the waterside hay hot water pellet furnace was 45 inches tall and around ...

  7. Rocket mass heater - Wikipedia

    en.wikipedia.org/wiki/Rocket_mass_heater

    A rocket mass heater (RMH), also known as rocket stove mass heater, is a form of slow-release radiant heating system, designed to primarily heat people and secondarily to warm areas in line of sight around it. Variations of RMH can also be extended for the functions of cooking, heating water, and producing warm air for distribution. [1]

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