Separation and Recovery of Vanadium and Chromium fromLiquor Solution by Fractional Precipitation
DOI:
https://doi.org/10.24218/jatpr.2018.16Keywords:
Vanadium, Melamine, Chromium, Lead sulfate. Vanadium and chromium are important metalsused for manufacturing iron, steel non-ferrous metals, andpetrochemicals because of their excellent physicochemical properties[1-3]. Many hydrometallurgical processes had been applied to leach out vanadium and chromium, including sub-molten salt technology[4, 5], alkaline electrochemical advanced oxidation process[6-9], roasting-leaching technology [10-12], pressure leaching [13], .etc. However, the separation of vanadium and chromium in the leaching solution was still a challenge for most researchers. The most common technology for vanadium recovery was ammonium precipitation technology [14-16], ammonium sulfate or ammonium chloride was added into the leaching solution to generate ammonium vanadate or ammonium polymer vanadate (APV) with low solubility in acidic solution about pH 2.0-2.5. However, the acidic wastewater was hard to purify. Other way, the recovery of chromium was to generatechromic anhydride with chromium solution. In this paper, we introduced a fractional precipitation technology to separate and recover chromium and vanadium. The technical route is displayed in Figure 1. The fractional precipitation technology was conducted with melamine and lead sulfate as precipitation agent. The solution firstly reacted with melamineAbstract
Vanadium and chromium was hard to separate due to their similar chemical and physical properties. Fractional precipitation technology with melamine and lead sulfate was conducted to separate and recover vanadium and chromium. Results showed that melamine played great adsorption efficiency of vanadium and lead sulfate could precipitate chromium successfully.Downloads
Published
2018-04-27
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Section
Short Communication