Direct separation of arsenic and antimony oxides by high-temperature filtration with porous FeAl intermetallic

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Huibin Zhang
  • Xinli Liu
  • Yao Jiang
  • Lin Gao
  • Linping Yu
  • Nan Lin
  • Yuehui He

Detail(s)

Original languageEnglish
Pages (from-to)364-371
Journal / PublicationJournal of Hazardous Materials
Volume338
Online published26 May 2017
Publication statusPublished - 15 Sep 2017

Abstract

A temperature-controlled selective filtration technology for synchronous removal of arsenic and recovery of antimony from the fume produced from reduction smelting process of lead anode slimes was proposed. The chromium (Cr) alloyed FeAl intermetallic with an asymmetric pore structure was developed as the high-temperature filter material after evaluating its corrosive resistance, structural stability and mechanical properties. The results showed that porous FeAl alloyed with 20 wt.% Cr had a long term stability in a high-temperature sulfide-bearing environment. The separation of arsenic and antimony trioxides was realized principally based on their disparate saturated vapor pressures at specific temperature ranges and the asymmetric membrane of FeAl filter elements with a mean pore size of 1.8 μm. Pilot-scale filtration tests showed that the direct separation of arsenic and antimony can be achieved by a one-step or two-step filtration process. A higher removal percentage of arsenic can reach 92.24% at the expense of 6 ∼ 7% loss of antimony in the two-step filtration process at 500 ∼ 550 °C and 300 ∼ 400 °C. The FeAl filters had still good permeable and mechanical properties with 1041 h of uninterrupted service, which indicates the feasibility of this high-temperature filtration technology.

Research Area(s)

  • Anode slime, Antimony, Arsenic, FeAl, Porous material

Citation Format(s)

Direct separation of arsenic and antimony oxides by high-temperature filtration with porous FeAl intermetallic. / Zhang, Huibin; Liu, Xinli; Jiang, Yao; Gao, Lin; Yu, Linping; Lin, Nan; He, Yuehui; Liu, C. T.

In: Journal of Hazardous Materials, Vol. 338, 15.09.2017, p. 364-371.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review