Study of physical and mechanical properties of vanadium slag

Technology of vanadium slag (VS) production and extraction vanadium out of it is money- and labor-consuming process, that stipulates the actuality of study of physical, mechanical and technological properties of VS and influences the effectiveness of its processing and utilization. It was noted, that the oxidizing-siliceous addition (OSA), used as a dilutant in the process of vanadium extraction, enables to ensure basic components content in the VS accounting the Technical Specifications ТУ 14-11-187–86. However, it changes the chemical and mineral compositions and distribution of metal inclusions by slag fractions, therefore all the studied parameters were considered by variants with the OSA and without it. The averaged chemical composition of VS, its mineral phases content and metal inclusions content presented. It was shown, that existing methods of evaluation of metal inclusions content in the VS do not ensure repeatability of the results. A methodology was proposed to evaluate slagging of metal inclusions by the hydrostatic weighing method. Besides, Influence of OSA on physical and mechanical properties of vanadium slag. A dependence of metal content in slag on its apparent density determined, which will increase accuracy of calculations of capacity of transport facilities, bunkers, warehouses etc. The study of the VS strength characteristics, knowledge of which is important for correct choice of crushing and grinding equipment, was accomplished with samples obtained with additions OSA and without OSA. The results obtained showed, that the strength of the VS without OSA is significantly higher, and the indices of crushability is lower, comparing with VS with OSA utilization. The VS with OSA additions is mechanical processed easier – at crushing, grinding. Besides, in this case the metal inclusions are opened better and during extraction out of a slag they are less slaggy.