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| Kinetics of Sulfuric Acid Oxidation Leaching of Low Grade Lead Matte |
| Received:July 01, 2022 Revised:July 09, 2022 |
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| DOI：doi：10.3969/j.issn.1007-7545.2022.11.003 |
| KeyWord:low grade lead matte; sulfuric acid; oxidizing leaching; kinetics |
| Author | Institution |
| FENG Jin-ting |
武汉科技大学 |
| QIN Qing-wei |
武汉科技大学 |
| CHEN Rong-sheng |
大江环保科技股份有限公司 |
| TANG Hai-bo |
大江环保科技股份有限公司 |
| ZENG Su-qin |
大江环保科技股份有限公司 |
| XU Wen-jun |
大江环保科技股份有限公司 |
| WANG Ming-xi |
大江环保科技股份有限公司 |
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| Abstract: |
| The oxidation leaching of low grade lead matte was studied by using H2SO4-H2O2 system. The composition of lead matte was studied by means of ICP, XRF, particle size analysis, XRD and SEM-EDS, and the leaching kinetic process was analyzed. The results show that copper leaching rate can reach 90.69% under the conditions including initial sulfuric acid concentration of 210 g/L, leaching temperature of 70 ℃, stirring speed of 400 r/min, mass ratio of hydrogen peroxide to lead matte of 5, leaching time of 180 min, and L/S=11. Kinetic analysis shows that the sulfuric acid oxidation leaching process of low grade lead matte conforms to the "unreacted shrinking core model" with reaction activation energy of 9.67 kJ/mol, and the leaching process is controlled by diffusion. |
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