Articles
  • Preparation of tungsten carbide from mixtures of natural wolframite and carbon-containing solid fuels with assistance of mechanical activation
  • L.Telmenbayara and J.Temuujinb,*
  • a School of Mechanical and Transportation Engineering, Mongolian University of Science and Technology, Ulaanbaatar, Mongolia b Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar 51, Mongolia
Abstract
Mechanically milled mixtures of wolframite and coke, coking coal or thermal coal have been characterized with DTA-TG, XRD and SEM techniques. Mixtures were milled with a planetary ball mill for 4 h and heated at 1000 oC or 1100 oC for 1 hr under argon gas. The mixtures with coke and coking coal contained WC and Fe3W3C whilst the mixture with thermal coal consisted of only Fe3W3C phase even after 1 hr calcination at 1100 oC. The amount of WC in the product from coke was higher than with coking coal. Thermal coal was not a suitable carbon source for forming WC by this route. Coke is considered the most preferable carbon source on preparation of WC in the carbothermic reduction of the wolframite.

Keywords: Wolframite, Coke, Coking coal, Thermal coal, Milling, Thermal reaction, Tungsten carbide

This Article

  • 2016; 17(5): 489-493

    Published on May 31, 2016