Basic research on the leaching behavior of vanadium-bearing steel slag with titanium white waste acid. Issue 1 (February 2021)

• Record Type: Journal Article
• Authors: Zhang, Weiguang; Zhang, Tingan; Li, Tingting; Lv, Guozhi; Cao, Xuejiao
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 1(2021)
• Publication Date: 2021-02
• Subjects: Vanadium-bearing steel slag -- Titanium white waste acid -- Vanadium -- Leach; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104897
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: The vanadium-bearing steel slag (VBSS) and titanium white waste acid (TWWA) are two kinds of metallurgical waste. In this paper, a new idea of collaborative reuse of metallurgical wastes was proposed in which TWWA was used as leaching agent to extract vanadium from VBSS. The orthogonal experimental results indicated that，H2 SO4 concentration has the most dominant effect on the leaching rate of vanadium, followed by liquid/solid (L/S) ratio. Moreover, the effect of leaching time, leaching temperature and stirring speed seems comparatively negligible. Single-factor experiments indicated that about 95% of the vanadium can be extracted effectively under the following conditions: H2 SO4 concentration of 300 g L −1, L/S ratio of 9:1, time of 60 min, stirring speed of 150 r min −1, at 363 K. Moreover, the leach residue contained only 0.06% of vanadium, which can be used as additive in cement industry. Graphical Abstract: ga1 The valuable metals such as vanadium are leached from vanadium bearing steel slag by titanium dioxide waste. The vanadium content of leaching residue is as low as 0.06%, and its main components are calcium sulfate and silicon dioxide, which can be used as additive in cement industry. Highlights: Two metallurgical wastes are utilized and valuable components are extracted. Leaching of vanadium from steel slag with titanium white waste acid is proposed. H2 SO4 concentration and L/S ratio are the most important factors for the leaching. More than 95% of vanadium can be effectively leached at leaching temperature of 363 K. Leaching residue are calcium sulfate and silica, used as additives in cement industry.