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L.Telmenbayar,J. Temuujin 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.5
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 hrunder argon gas. The mixtures with coke and coking coal contained WC and Fe3W3C whilst the mixture with thermal coalconsisted of only Fe3W3C phase even after 1 hr calcination at 1100 oC. The amount of WC in the product from coke was higherthan with coking coal. Thermal coal was not a suitable carbon source for forming WC by this route. Coke is considered themost preferable carbon source on preparation of WC in the carbothermic reduction of the wolframite