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, Volume 11, Issue 2, pp 615–625 | Cite as

Characterization and Beneficiation of Gold Mining By-products as Source of High-Quality Silica for High Technical Applications; Response Surface Studies and Optimization

  • Mostafa R. AbukhadraEmail author
  • Mohamed Shaban
  • Aya S. Mohamed
  • Mohamed G. Shahien
Original Paper
  • 33 Downloads

Abstract

This paper aims to evaluate and upgrade the quality of quartz mining by-products through acid leaching process. The quartz samples were collected as gold mine by-products from El Sid- Fawakhir gold mine, Qift-Quseir, Eastern Desert, Egypt and characterized using XRF and polarized transmitted optical microscope. The present magnetic mineral impurities were detected using Frantz Isodynamic Tester. Suitability of acid leaching utilizing oxalic acid as an efficient technique for considerable reduction of the associated impurities was evaluated based on Response Surface methodology and face centered central composite design (CCD). The quartz sample was classified as low-quality quartz with low silica content (99.3%) which can’t match the requirements of wide range of applications. The main detected impurities are muscovite, biotite, sericite, pyrite and iron oxide. The present magnetic impurities represent about 2.72% of the total sample. The leaching process at the optimum conditions of temperature, time and oxalic acid concentration removes \(\sim \) 36% of the iron. This associated with a clear reduction of other magnetic impurities and noticeable enhancing in the silica content to about 99.56%. Magnetic purification followed by oxalic acid leaching for the quartz samples give better results as the iron content was reduced to about 0.001% and the silica content increased to about 99.9% which match the specifications of most of the typical high technical applications.

Keywords

Gold by-products Magnetic impurities Acid leaching Response Surface Methodology Face centered central composite design (CCD) 

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Mostafa R. Abukhadra
    • 1
    • 2
    Email author
  • Mohamed Shaban
    • 1
  • Aya S. Mohamed
    • 2
  • Mohamed G. Shahien
    • 2
  1. 1.Nanophotonics and Applications Laboratory, Physics Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt
  2. 2.Geology Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt

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