Optimization Of Effectives Of Parameters On Acid Leaching Of Silica Sand For Use In Glass Industry

Authors

1 Assistant Professor, Dept. of Mineral Processing, Imam Khomeini International University (IKIU), Qazvin

2 M.Sc, Dept. of Mineral Processing, Imam Khomeini International University (IKIU), Qazvin

Abstract

In this paper, the removal of iron oxide (Fe2O3) from silica sand samples of Cheshin mine with acid leaching (H2SO4) has been investigated under various experimental conditions. The silica sample used for leaching process contains 96.23% SiO2, 0.13% Fe2O3, and 1.67% Al2O3. The parameters affecting the process were investigated through designing experiments by Taguchi method in Minitab software. The parameters studied were: pH value, solid content, and pulp temperature. Mineralogical studies indicated that the silica sand sample contains pyrite, and iron oxide and iron hydroxide minerals such as hematite, goethite, and limonite. The results of acid leaching process indicated that the iron removal would increase by decreasing pH from 2 to 1. Also, the amount of iron in silica sand would decrease as the solid content and the temperature were increased from 50% to 70% and 40 °C to 80 °C, respectively. The highest iron removal rate was obtained under the optimum conditions including pH=1, temperature degree =80 °C, and the solid content of 70%. Therefore, the final processed sample contained 98.50% SiO2, 0.031% iron oxide (Fe2O3), 0.70% Al2O3, and 0.32% CaO, which is suitable for producing cup glass, glassware, and borosilicate crystal.

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References

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Journal of Mineral Resources Engineering
Volume 3, Issue 4 - Serial Number 10
February 2019
Pages 121-133

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History

  • Receive Date: 12 June 2018
  • Revise Date: 07 September 2018
  • Accept Date: 03 January 2019

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