采用常压浸出与加压浸出相结合的方法，研究硫化锌精矿在富氧硫酸体系中的常压直接浸出动力学。结果表明：锌浸出受界面化学反应控制，浸出反应表观活化能为(44.28±4.28) kJ/mol。浸出槽底部锌的浸出速率远高于浸出槽上部锌的浸出速率，且随槽底矿浆压力的增大，锌的浸出速率明显提高。进一步基于收缩核模型，通过二次回归方法，建立浸出槽底部锌的浸出动力学方程。在硫化锌精矿常压富氧直接浸出中，对于位于浸出槽底部的锌浸出，温度的影响明显大于矿浆压力的影响。
The atmospheric direct leaching (ADL) kinetics of zinc sulfide concentrate in oxygen-rich sulfuric acid system was studied by the integration of atmospheric leaching and pressure leaching. The results show that the extraction of zinc is controlled by interface chemical reaction and the apparent activation energy of leaching reaction is calculated as (44.28±4.28) kJ/mol. The leaching rate of zinc at the bottom of ADL tank is much higher than that at the top of ADL tank and it is improved greatly with the increase of the slurry pressure at the bottom of ADL tank. The kinetic equation for zinc leaching at the bottom of ADL tank was further established by quadratic regression on the basis of shrinking core model. The influence of temperature on the extraction of zinc at the bottom of ADL tank is greater than that of slurry pressure.
参考文献
| [1] | Adelson D. de Souza;Pablo S. Pina;Versiane Albis Leao .Bioleaching and chemical leaching as an integrated process in the zinc industry[J].Minerals Engineering,2007(6):591-599. |
| [2] | DELLER G.World zinc supply and demand-heading for a late decade price spike[A].Kyoto:The Minerals,Metals&Materials Society,2005:17-25. |
| [3] | BUBAN K R;COLLINS M J;MASTERS I M;TRYTTEN L C.Comparison of direct pressure leaching with atmospheric leaching of zinc concentrates[A].Pittsburg:The Minerals,Metals&Materials Society,2000:727-738. |
| [4] | BEREZOWSKY R M G S;COLLINS M J;KERFOOT D G E;TORRES N .The commercial status of pressure leaching technology[J].JOM,1991,43(02):9-15. |
| [5] | 邱定蕃.加压湿法合金过程化学与工业实践[J].矿冶,1994(04):55. |
| [6] | 石伟;涂桃枝;杨寒林;夏光祥.催化氧化酸浸法处理锌精矿的研究[J].有色金属:冶炼部分,1999(01):8-10. |
| [7] | 蒋开喜;林江顺;王海北;刘大星,王春,李岚,王玉芳,江培海 .一种从含锌硫化矿物提取锌的方法[P].中国,CN01140484.1,2002-07-24. |
| [8] | van PUT J W;TERWINGHE F M I G;de NYS T S A .Process for the extraction of zinc from sulphide concentrates[P].US,5858315,1999-01-12. |
| [9] | FUGLEBERG S;J?RVINEN A .Method for leaching zinc concentrate in atmospheric conditions[P].Finland,WO/1998/006879,1998-02-19. |
| [10] | Dimitrios Filippou .INNOVATIVE HYDROMETALLURGICAL PROCESSES FOR THE PRIMARY PROCESSING OF ZINC[J].Mineral Processing and Extractive Metallurgy Review,2004(3):205-252. |
| [11] | SVENS K;KERSTIEN B;RUNKEL M .Recent experiences with modern zinc processing technology[J].Erzmetall,2003,56:94-103. |
| [12] | H. Takala .Leaching of Zinc Concentrates at Outokumpu Kokkola Plant[J].Erzmetall,1999(1):37-42. |
| [13] | T. Haakana;B. Saxen;L. Lehtinen .Outotec direct leaching application in China[J].Journal Of The South African Institute Of Mining & Metallurgy,2008(5):245-251. |
| [14] | PEREZ I P;DUTRIZAC J E .The effect of the iron content of sphalerite on its rate of dissolution in ferric sulphate and ferric chloride media[J].HYDROMETALLURGY,1991,26(02):211-232. |
| [15] | Alafara A. Baba;Folahan A. Adekola .Hydrometallurgical processing of a Nigerian sphalerite in hydrochloric acid: Characterization and dissolution kinetics[J].Hydrometallurgy,2010(1/2):69-75. |
| [16] | Gokhan Ucar .Kinetics of sphalerite dissolution by sodium chlorate in hydrochloric acid[J].Hydrometallurgy,2009(1/2):39-43. |
| [17] | S.Aydogan;A.Aras;M.Canbazoglu .Dissolution kinetics of sphalerite in acidic ferric chloride leaching[J].Chemical Engineering Journal,2005(1/3):67-72. |
| [18] | Mohammad Al-Harahsheh;Sam Kingman .The influence of microwaves on the leaching of sphalerite in ferric chloride[J].Chemical Engineering and Processing,2007(10):883-888. |
| [19] | DEHGHAN R;NOAPARAST M;KOLAHDOOZAN M .Leaching and kinetic modeling of low-grade calcareous sphalerite in acidic ferric chloride solution[J].HYDROMETALLURGY,2009,96(04):275-282. |
| [20] | RATH P C;PARAMGURU R K;JENA P K .Kinetics of dissolution of zinc sulphide in aqueous ferric chloride solution[J].Hydrometallury,1981,6(3/4):219-225. |
| [21] | BOBECK G E;SU H .The kinetics of dissolution of sphalerite in ferric chloride solution[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1985,16(03):413-424. |
| [22] | Weisener CG.;Smart RSC.;Gerson AR. .Kinetics and mechanisms of the leaching of low Fe sphalerite[J].Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society,2003(5):823-830. |
| [23] | CRUNDWELL F K .Kinetics and mechanism of the oxidative dissolution of a zinc sulphide concentrate in ferric sulphate solutions[J].HYDROMETALLURGY,1987,19(02):227-242. |
| [24] | DUTRIZAC J E.The kinetics of sphalerite dissolution in ferric sulphate-sulphuric acid media[A].Kyoto:The Minerals,Metals & Materials Society,2005:833-851. |
| [25] | A.D. Souza;P.S. Pina;V.A. Leao .The leaching kinetics of a zinc sulphide concentrate in acid ferric sulphate[J].Hydrometallurgy,2007(1/2):72-81. |
| [26] | Teresa Pecina;Telhma Franco;Pedro Castillo .Leaching of a zinc concentrate in H_2SO_4 solutions containing H_2O_2 and complexing agents[J].Minerals Engineering,2008(1):23-30. |
| [27] | 肖纯,杨声海.硫化锌精矿空气氧化硫酸浸出的动力学研究[J].有色金属（冶炼部分）,2008(01):7-10. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%