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| The effects of ammonia-ammonium salts and#$NBSleaching aid agents#$NBSon leaching zinc of hemimorphite |
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Received:March 07, 2017
Revised:March 16, 2017
Accepted:March 16, 2017
Published Online:December 01, 2017
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| DOI： |
| KeyWord:hemimorphite; leaching; NH3-(NH4)2SO4 solution;leaching aid agents |
| Author | Institution |
| Qiu Xuejun |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
| Li Linfei |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
| Li Jian |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
| Hua Yixin |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
| Xu Cunying |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
| Li Yan |
Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming |
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| Abstract: |
| In order to realize effective leaching of hemimorphite in zinc oxide ore, the solutions of NH3-NH4Cl, NH3-(NH4)2SO4 and NH3-(NH4)2CO3 containing the same concentrations of [NH3]、[NH4 ] were used respectively as leaching agent to leach zinc of hemimorphite. Leaching ratios of zinc were affected by the ammonium salts from big to small: NH3-(NH4)2SO4＞NH3-NH4Cl＞NH3-(NH4)2CO3. The effect of leaching process conditions on the leaching ratio of zinc of hemimorphite was studied using leaching agent of NH3-(NH4)2SO4. When the concentration of total ammonia is 8.5 mol/L, [NH3]／[NH4 ] is 1, temperature is 45℃, stirring speed is 300r/min, and the leaching time is 1 h, leaching ratio of zinc is 86.0%. Futhermore, when a certain amount of ChCl-Urea DES and ethanediamine respectively as leaching aid agent was added into NH3-(NH4)2SO4 solution forming new leaching agents used to leach zinc of hemimorphite, in the same leaching process conditions, leaching ratios of zinc could up to 92.0% and 97.7% respectively. |
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