Reaction-kinetics of the vanadium roast process using steel slag as a secondary raw material

In-situ chromium and vanadium recovery of landfilled ferrochromium and stainless steel slags

“…Similar to Cr, V can be recovered from low-grade primary and secondary raw materials, such as steel slag, by means of roasting processes [23] or alkaline leaching in the presence of oxidation agents [24]. Generally, the oxidant in V leaching oxidises V(III) and/or V(IV) to V(V) to enhance V dissolution.…”

Influence of P2O5 on Crystallization of V-concentrating Phase in V-bearing Steelmaking Slag

“…This might be explained as follows. It is known from the theory of particle coarsening according to 15) ....................... (6) with the critical radius r* and the temperature T. Thus, it can be concluded that, in P 2 O 5 -free slag, the critical radius r* for the Ca 3 (VO 4 Fig. 8, we can also found that there bears not linear change of mean diameter of V-concentrating phase crystals with duration and mean diameter does not increase linearly with the increasing content of P 2 O 5 .…”

“…Some authors applied a process of roasting and subsequent leaching to recover the vanadium from the steelmaking slag. 4,5) Another process of selective enrichment which handles lower content of element or compound in slag has been proposed and used in Ti-bearing blast-furnace slag for Ti and in B-bearing slag for B. 6,7) Our previous studies have found that when V-bearing steelmaking slag with 2.4 wt% P 2 O 5 was doped with 20 wt% Al 2 O 3 , most of V 2 O 5 in the slag was concentrated in whitlockite, 8,9) and V-concentrating phase grew with holding time at crystallization temperature of 1 648 K. But the study of influence of chemical composition, for example, P 2 O 5 , on crystallization of V-concentrating phase has not found anywhere.…”

Preparation of V2O5 from converter slag containing vanadium

“…In the last decades, many studies have been conducted to recover vanadium from steel slag [2,6,[8][9][10][12][13][14]. To recover vanadium in the form of metal vanadium or V 2 O 5 , steel slag containing vanadium is usually treated through several processes including roasting, leaching, extracting, and precipitating.…”