| 不同化学结合剂对铜氧化物的团聚和浸出行为 |
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| 作者姓名： | Sheng-hua Yin Lei-ming Wang Xun Chen Ai-xiang Wu |
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| 作者单位： | 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;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;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;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Department of Materials Engineering,University of British Columbia,309-6350 Stores Road,Vancouver,BC V6T 1Z4,Canada;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 |
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| 摘 要： | The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this study, we investigated the effect of the type of binder and mass fraction of the H2SO4 solution used on the curing, soaking, and leaching behavior of agglomerations. The results revealed that Portland cement (3CaO·SiO2, 2CaO·SiO2, and 3CaO·Al2O3) was the optimal binder for obtaining a well-shaped, stable agglomeration structure. A higher extraction rate was achieved when using Portland cement than that obtained using sodium silicate, gypsum, or acid-proof cement. An excessive geometric mean size is not conducive to obtaining well-shaped agglomerations and desirable porosity. Using computed tomography (CT) and MATLAB, the porosity of two-dimensional CT images in sample concentrations L1–L3 was observed to increase at least 4.5vol% after acid leaching. Ore agglomerations began to be heavily destroyed and even to disintegrate when the sulfuric acid solution concentration was higher than 30 g/L, which was caused by the excessive accumulation of reaction products and residuals.
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| 关 键 词： | ,,,,,,, |
Agglomeration and leaching behaviors of copper oxides with different chemical binders |
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| Sheng-hua Yin,Lei-ming Wang,Xun Chen,Ai-xiang Wu.Agglomeration and leaching behaviors of copper oxides with different chemical binders[J].International Journal of Minerals,Metallurgy and Materials,2021,28(7):1127-1134. |
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| Authors: | Sheng-hua Yin Lei-ming Wang Xun Chen Ai-xiang Wu |
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| Abstract: | The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this study, we in-vestigated the effect of the type of binder and mass fraction of the H2SO4 solution used on the curing, soaking, and leaching behavior of ag-glomerations. The results revealed that Portland cement (3CaO·SiO2, 2CaO·SiO2, and 3CaO·Al2O3) was the optimal binder for obtaining a well-shaped, stable agglomeration structure. A higher extraction rate was achieved when using Portland cement than that obtained using sodi-um silicate, gypsum, or acid-proof cement. An excessive geometric mean size is not conducive to obtaining well-shaped agglomerations and desirable porosity. Using computed tomography (CT) and MATLAB, the porosity of two-dimensional CT images in sample concentrations L1-L3 was observed to increase at least 4.5vol％ after acid leaching. Ore agglomerations began to be heavily destroyed and even to disinteg-rate when the sulfuric acid solution concentration was higher than 30 g/L, which was caused by the excessive accumulation of reaction products and residuals. |
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| Keywords: | agglomeration binder acid leaching copper oxide sulfuric acid solution |
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