Establishing patterns of the structural-phase transformations during the reduction of tungsten-containing ore concentrate with carbon

This paper reports a study into the phase composition and microstructure of tungsten ore concentrate after carbon-thermal reduction at different O:C ratios in charge. is required for determining those indicators that reduce loss through sublimation oxide compounds when processing concentrates, as well using reduced tungsten-containing doping additives. The results have established ratio charge within interval 1.33?2.30 contained phases W, W2C C, WO2. demonstrated spongy disordered character. Together with Mo, Si, Ca, Al impurities were present products. main elements identified sites studied had following limiting content, % by weight: O – 5.01–17.32; C 0.84–4.23; W 61.21–86.78; Mo 1.57–7.51; Si 2.07–9.06; Ca 1.34–11.30; 0.27–0.40. micro-inclusions examined surface areas acquired complex shapes. There traces process caking between particles. analysis resulting data has shown most preferred was 1.65. In this case, there no lack carbon predominance relatively little manifestation phases, carbon, residual part post-reduction component would occur during process. sponge structure contributes to higher dissolution rate compared standard ferroalloys. Lack high propensity does not require any special conditions prevent gas phase, which increases degree assimilation target element