| Increasing silver leaching rate from leaching-resistant zinc residues by thiourea leaching method with pressurized preoxidation process |
| |
| 作者姓名： | 胡天觉 曾光明 黄国和 袁兴中 李建兵 |
| |
| 作者单位： | Department of Environmental Science and Engineering，Hunan University，Changsha 410082，China，Department of Environmental Science and Engineering，Hunan University，Changsha 410082，China，Department of Environmental Science and Engineering，Hunan University，Changsha 410082，China，Department of Environmental Science and Engineering，Hunan University，Changsha 410082，China，Department of Environmental Science and Engineering，Hunan University，Changsha 410082，China |
| |
| 基金项目： | Project( 2 0 0 1AA6 40 40 2)supportedbytheNationalAdvancedTechnologiesResearchFoundationofChina，Project( 70 1710 5 5 ,5 0 1790 11)supportedbytheNationalNaturalScienceFoundationofChina |
| |
| 摘 要： | 1 ＩＮＴＲＯＤＵＣＴＩＯＮＡｔｐｒｅｓｅｎｔ ,ｚｉｎｃｉｓｐｒｏｄｕｃｅｄｂｙｔｈｅｈｙｄｒｏｍｅｔａｌｌｕｒｇｙ ｅｌｅｃｔｒｏａｎａｌｙｓｉｓｍｅｔｈｏｄｉｎｍｏｓｔｚｉｎｃｓｍｅｌｔｉｎｇｐｌａｎｔｓ .Ｅａｃｈｙｅａｒ,ｍｉｌｌｉｏｎｓｔｏｎｓｏｆｈｙｄｒｏｍｅｔａｌｌｕｒｇｉｃａｌｚｉｎｃｒｅｓｉｄｕｅｓａｒｅｄｉｓｃｈａｒｇｅｄｆｒｏｍＣｈｉｎｅｓｅｓｍｅｌｔｉｎｇｐｌａｎｔｓ ,ｗｈｉｃｈａｒｅｈｉｇｈｌｙａｃｉｄｉｃａｎｄｃｏｎｓｉｓｔｏｆｇｒｅａｔｄｅａｌｏｆｓｉｌｖｅｒａｎｄｏｔ…
|
Increasing silver leaching rate from leaching-resistant zinc residues by thiourea leaching method with pressurized preoxidation process |
| |
| HU Tian-jue,ZENG Guang-ming,HUANG Guo-he,YUAN Xing-zhong,LI Jian-bing.Increasing silver leaching rate from leaching-resistant zinc residues by thiourea leaching method with pressurized preoxidation process[J].Transactions of Nonferrous Metals Society of China,2003,13(1). |
| |
| Authors: | HU Tian-jue ZENG Guang-ming HUANG Guo-he YUAN Xing-zhong LI Jian-bing |
| |
| Abstract: | As for the leaching-resistant zinc residues, the silver leaching rate can be over 98% through the processof pressurized preoxidation and thiourea leaching. Compared with the method of extracting the silver directly fromthe leaching-resistant zinc residues, the silver leaching rate is greatly improved. The optimum preoxidation condi-tions are: particle size range 40 - 60 μm, oxygen partial pressure 106 Pa, temperature 80 - 90 ℃, pH= 1.0, andleaching time 5 h. After pretreatment, the time of thiourea leaching silver is shortened to 1.5 h, and the thioureaconsumption is reduced greatly. The oxidation mechanism and the thiourea leaching kinetics were also explored. |
| |
| Keywords: | zinc residue pressurized preoxidation thiourea leaching shrinking core model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
