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International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao


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Volume 1 (2002)

Preparation of Pyrrhotite from Ammonium Jarosite and Estimation of Activation Energy in Reducing Atmosphere

Xiaoling Ma
  • State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, China
  • Shaanxi Engineering Center of Metallurgical Sediment Resource, Shaanxi University of Technology, Hanzhong, Shaanxi 723000, China
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/ Hongbin Tan
  • Corresponding author
  • State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, China
  • Shaanxi Engineering Center of Metallurgical Sediment Resource, Shaanxi University of Technology, Hanzhong, Shaanxi 723000, China
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/ Faqin Dong
  • Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry Education, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
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/ Bowen Li
  • Dept. Materials Science and Engineering, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931, USA
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/ Jinfeng Liu
  • State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, China
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/ Yuanxiang Chen
  • State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, China
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/ Lu Wang
  • State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, China
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Published Online: 2019-04-09 | DOI: https://doi.org/10.1515/ijcre-2018-0149

Abstract

Ammonium jarosite sediment is a by-product of hydrometallurgical process used to extract zinc metal, which, which contains heavy metal ions and raises severe environmental concerns The transformation of jarosite sediment into high-value-added sulfide products through simple processing is a cost-effective and efficient strategy to overcome environmental and waste management issues. Herein, the influence of sulfur on thermal decomposition of ammonium jarosite is investigated in reducing atmosphere. The results reveal that the presence of sulfur promoted the decomposition of ammonium jarosite and szomolnokite and iron oxide phases have been observed after being heat treated at 300 °C. Moreover, after heat treatment at 700 °C, the decomposition of jarosite/sulfur mixture resulted in the formation of pyrrhotite phase, which can be used as a raw material for sulfuric acid production. Lastly, the activation energy of pyrrhotite formation has been estimated by using KAS equation and found to be 216.2 kJ/mol in reducing atmosphere.

Keywords: ammonium jarosite; sulfur; pyrrhotite; activation energy; cyclic utilization

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About the article

Received: 2018-06-15

Accepted: 2019-03-26

Revised: 2019-03-24

Published Online: 2019-04-09


Citation Information: International Journal of Chemical Reactor Engineering, 20180149, ISSN (Online) 1542-6580, DOI: https://doi.org/10.1515/ijcre-2018-0149.

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