Atomic atmosphere: a way to understand phase evolution during vanadium slag roasting at the atomic level

Abstract

To increase vanadium recovery, it is critical to understand the intrinsic phase evolution during vanadium slag roasting. This work proposes the novel concept of `atomic atmosphere' to effectively evaluate and recognize the microscopic state of the vanadium atom in vanadium slag before and after roasting. Atomic atmosphere includes the chemical state, chemical environment and spatial environment of the atom, and provides a universal way to explore the microscopic phase evolution mechanism during the metal‐extraction process from minerals.

Rapid Vanadium Extraction from Roasted Vanadium Steel Slag via a H2SO4–H2O2 System: Process and Mechanism

“…In the vanadium extraction process, vanadium in the mineral exists primarily as iron vanadium oxide and surrounds the matrix of olivine phases (Fe 2 SiO 4 ), and the high-valence vanadate is more easily dissolved in the leaching solution . Although alkaline salt roasting may be helpful for vanadium extraction, the roasted slag or the leached residual still contains a certain amount of low-valence vanadium compounds .…”