研究煤在铁闪锌矿氧压酸浸中的应用.实验发现,含碳量高于70%的煤无助于铁闪锌矿浸出.在温度为423 K时,低碳煤(褐煤)可以用作铁闪锌矿氧压酸浸中优良的硫分散剂,其用量选定1.0%(相对于精矿质量)为宜.在98%以上精矿粒度小于43 μm,液固比为4.5∶1 mL/g,浸出剂中初始硫酸浓度为1.43 mol/L,锌浓度为0.62 mol/L,浸出温度为423 K,氧分压为0.5 MPa,搅拌转速为800 r/min,浸出1.5 h条件下,添加1.0%褐煤后,锌浸出率达到96%,上述工艺运行高效、稳定.褐煤具有比木质素磺酸钠更强的分散单质硫的能力,并能基本消除单质硫对浸出残余硫化矿的沾染.
参考文献
| [1] | FORWARD F A;VELTMAN H .Direct leaching zinc-sulfide concentrates by Sherritt Gordon[J].Journal of Metals,1959(11):836-840. |
| [2] | PAWLEK F E .Research in pressure leaching[J].Journal of the South African Institute of Mining and Metallurgy,1969,69(12):632-654. |
| [3] | JAN R J;HEPWORTH M T;FOX V G .A kinetic study on the pressure leaching of sphalerite[J].Metallurgical Transactions B,1976,7B:353-361. |
| [4] | VELTMAN H;JAMES G;MOULD J;KAWULKA P .Two-stage pressure leaching process for zinc and iron bearing mineral sulphides[P].US 4004991,1977-01-25. |
| [5] | 夏光祥.锌精矿加压酸浸过程物理化学初步研究[J].化工冶金,1985(03):17-26. |
| [6] | PARKER E G .Oxidative pressure leaching of zinc concentrates[J].CIM Bulletin,1987,74(829):145-150. |
| [7] | PETERS E .Hydrometallurgical process innovation[J].HYDROMETALLURGY,1992,29(1-3):431-459. |
| [8] | SUSAN A. BALDWIN;GEORGE P. DEMOPOULOS;VLADIMIROS G. PAPANGELAKIS .Mathematical Modeling of the Zinc Pressure Leach Process[J].Metallurgical and Materials Transactions, B. Process metallurgy and materials processing science,1995(5):1035-1047. |
| [9] | HARVER T J;YEN W T;PATERSON J G .A kinetic investigation into the pressure oxidation of sphalerite from a complex concentrate[J].Minerals Engineering,1993,6(8-10):949-967. |
| [10] | 邱定蕃.加压湿法合金过程化学与工业实践[J].矿冶,1994(04):55. |
| [11] | CHALKLEY M E;COLLINS M J;MASTER I M;OZBERK E.Deportment of elements in the Sherritt zinc pressure leach process[A].Sendal,Japan:The Mining & Materials Processing Institute of Japan,1995:612-630. |
| [12] | CHALKLEY M E;MASTERS I M;DOYLE B N .Recovery of metals from sulphidic material[P].US 5380354,1995-01-10. |
| [13] | BUBAN K R;COLLINS M J;MASTER I M .Iron control in zinc pressure leach process[J].JOM-Journal of the Minerals Metals & Materials Society,1999,51(12):23-25. |
| [14] | 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:TMS,2000:727-738. |
| [15] | KAWALKA P;HAFFENDEN W J;MACKIW V N .Recovery of zinc from zinc sulphides by direct pressure leaching[P].US 3867268,1975-02-18. |
| [16] | 张武存;黄芝林;王万禄.铁闪锌矿氧压酸浸试验[J].云南冶金,1990(06):39-42. |
| [17] | 李精佳;陈家镛 .锌精矿加压氧化酸浸过程中添加剂的作用[J].有色金属,1987,39(02):65-71. |
| [18] | OWUSU G;PETERS E;DREISINGER D B .Surface tensions and contact angles due to ligin sulphonates in the system:liquid sulphur,aqueous zinc sulphate and zinc sulphide[J].Canadian Journal of Chemical Engineering,1992,70(1-3):173-180. |
| [19] | OWUSU G;DREISINGER D B;PETERS E .Effect of surfactants on zinc and iron dissolution rates during oxidative leaching of sphalerite[J].HYDROMETALLURGY,1995,38(03):315-324. |
| [20] | OWUSU G;DREISINGER D B;PETERS E .Interracial effects of surface-active agents under zinc pressure leach conditions[J].Metallurgical and Materials Transactions B,1995,26B:5-12. |
| [21] | COLLINS M J;KOFLUK D K .Recovery of zinc from sulphide concentrates[P].US 5770170,1998-06-23. |
| [22] | COLLINS M J;KOFLUK D K .Recovery of zinc from sulphidic concentrates[P].US 5651947,1997-07-29. |
| [23] | 徐志峰 .铁闪锌矿加压浸出基础理论及工艺研究[D].北京:北京科技大学,2006. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%