enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Rotary kiln - Wikipedia

    en.wikipedia.org/wiki/Rotary_kiln

    A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process. Materials produced using rotary kilns include: Cement; Lime; Refractories; Metakaolin; Titanium dioxide; Alumina; Vermiculite; Iron ore pellets; They are also used for roasting a wide variety of sulfide ores prior to ...

  3. Waelz process - Wikipedia

    en.wikipedia.org/wiki/Waelz_process

    The Waelz process is a method of recovering zinc and other relatively low boiling point metals from metallurgical waste (typically electric arc furnace flue dust) and other recycled materials using a rotary kiln (waelz kiln). The zinc enriched product is referred to as waelz oxide, and the reduced zinc by product as waelz slag.

  4. Expanded clay aggregate - Wikipedia

    en.wikipedia.org/wiki/Expanded_clay_aggregate

    Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a lightweight aggregate made by heating clay to around 1,200 °C (2,190 °F) in a rotary kiln. The heating process causes gases trapped in the clay to expand, forming thousands of small bubbles and giving the material a porous structure.

  5. Krupp–Renn process - Wikipedia

    en.wikipedia.org/wiki/Krupp–Renn_Process

    View of the six rotary furnaces at the Essen–Borbeck direct reduction plant, c. 1964. The Krupp–Renn process was a direct reduction steelmaking process used from the 1930s to the 1970s. It used a rotary furnace and was one of the few technically and commercially successful direct reduction processes in the world, acting as an alternative to ...

  6. Calcination - Wikipedia

    en.wikipedia.org/wiki/Calcination

    Calcination is thermal treatment of a solid chemical compound (e.g. mixed carbonate ores) whereby the compound is raised to high temperature without melting under restricted supply of ambient oxygen (i.e. gaseous O 2 fraction of air), generally for the purpose of removing impurities or volatile substances and/or to incur thermal decomposition.

  7. Cement kiln - Wikipedia

    en.wikipedia.org/wiki/Cement_kiln

    Rotary kilns run 24 hours a day, and are typically stopped only for a few days once or twice a year for essential maintenance. One of the main maintenance works on rotary kilns is tyre and roller surface machining and grinding works which can be done while the kiln works in full operation at speeds up to 3.5 rpm.

  8. Download, install, or uninstall AOL Desktop Gold - AOL Help

    help.aol.com/articles/aol-desktop-downloading...

    Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.

  9. Sectional cooler - Wikipedia

    en.wikipedia.org/wiki/Sectional_cooler

    Any free flowing bulk material can be cooled in a sectional cooler. They are often found after rotary kilns in calcination or other similar processes. [4] The purpose of sectional coolers is usually to reduce the material temperature enough that it can be handled with other machines such as conveyor belts and mills.