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Research Article

Response of agglomeration and leaching behavior of copper oxides to chemical binders

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  • Received: 6 March 2020Revised: 16 April 2020Accepted: 22 April 2020Available online: 24 April 2020
  • The chemical binder is one of critical factors that affecting ore agglomeration behavior and leaching efficiency. In this study, the effect of types of binders and mass fraction of H2SO4 solution on curing, soaking and leaching behavior of agglomerations were conducted. The results showed that the Portland cement (3CaO·SiO2, 2CaO·SiO2, 3CaO·Al2O3) was the optional binder to obtain well-shape, stable structure of agglomeration. A higher extraction rate was reached using Portland cement instead of sodium silicate, gypsum and acid-proof cement. The excessive geometric mean size is not conducive to well-shaped agglomerations and desirable porosity. Relied on Computed Tomography (CT) and MATALB, the porosity of 2-D CT images in L1~L3 increased at least 4.5 % after acid leaching. Ore agglomerations started to be heavily destroyed and even disintegrate if sulfuric acid solution was higher than 30 g/L, it was caused by undesirable accumulation of reaction products and residuals.
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Response of agglomeration and leaching behavior of copper oxides to chemical binders

  • Corresponding author:

    Lei-ming Wang    E-mail: ustb_wlm@126.com

  • 1. Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
  • 2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 3. Department of Materials Engineering, University of British Columbia, 309-6350 Stores Road, Vancouver, BC V6T 1Z4, Canada

Abstract: The chemical binder is one of critical factors that affecting ore agglomeration behavior and leaching efficiency. In this study, the effect of types of binders and mass fraction of H2SO4 solution on curing, soaking and leaching behavior of agglomerations were conducted. The results showed that the Portland cement (3CaO·SiO2, 2CaO·SiO2, 3CaO·Al2O3) was the optional binder to obtain well-shape, stable structure of agglomeration. A higher extraction rate was reached using Portland cement instead of sodium silicate, gypsum and acid-proof cement. The excessive geometric mean size is not conducive to well-shaped agglomerations and desirable porosity. Relied on Computed Tomography (CT) and MATALB, the porosity of 2-D CT images in L1~L3 increased at least 4.5 % after acid leaching. Ore agglomerations started to be heavily destroyed and even disintegrate if sulfuric acid solution was higher than 30 g/L, it was caused by undesirable accumulation of reaction products and residuals.

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