研究赤铁矿法处理高铁闪锌矿浸出液过程中ZnSO 4和MgSO 4浓度对除铁率及赤铁矿渣性质的影响，讨论元素Zn、Mg和S在赤铁矿渣中的存在形态及形成机理。结果表明，除铁率随ZnSO 4浓度的升高而增加，随MgSO 4浓度的升高而降低。增加硫酸盐的浓度可以得到结晶形态更好的晶体。赤铁矿的粒度和S含量随硫酸盐浓度的升高而降低，比表面积随硫酸盐浓度的升高而增加。Zn浓度和Mg浓度的合理存在范围分别为80~100 g/L和小于10 g/L；Zn以ZnSO 4的形式存在于赤铁矿表面，少量的Mg以夹带的方式存在于赤铁矿渣中。
The effects of ZnSO 4 and MgSO 4 concentrations on the iron removal rate and the properties of residues for treating the leaching liquor of high iron sphalerite by hematite process were investigated, the existent form and formation mechanism of Zn, Mg and S in hematite were discussed. The results show that the iron removal rate increases with increasing the ZnSO 4 concentration and decreases with increasing the MgSO 4 concentration. Better crystal morphology of precipitates can be obtained by increasing the sulfate concentration. Higher sulfate concentration produced precipitates with finer particle sizes, lower S contents and bigger specific surface area. A reasonable existence range of Zn and Mg are 80~100 g/L and <10 g/L, respectively. Zn exists in hematite surface as ZnSO 4 , low levels of Mg in the precipitates present as tiny liquid inclusions in the hematite particles.
参考文献
| [1] | 王吉坤,李存兄,李勇,张红耀,黄卉,阎江峰,刘露,魏昶.高铁闪锌矿高压酸浸过程中ZnS-FeS-H2O系的电位-pH图[J].有色金属（冶炼部分）,2006(02):2-5. |
| [2] | 王纪明,彭兵,柴立元,李密,彭宁.锌浸渣还原焙烧-磁选回收铁[J].中国有色金属学报（英文版）,2012(05):1455-1461. |
| [3] | 何静,罗超,唐谟堂,鲁君乐,王小能,王涛.采用铅黄铁矾去除硫酸体系中的铁[J].中国有色金属学报,2012(10):2890-2895. |
| [4] | COLLINS M J;CHALKLEY ME;MASTERS I M;OZBERK E.The sherritt two-stage zinc pressure leach process with hematite precipitation[A].Parkville:Australasian Inst of Mining &Metallurgy,1993:315-323. |
| [5] | ONOZAKI A;SATO K;KURAMOCHI S.Effect of some impurities on iron precipitation at the Iijima Zinc Refinery[J].Iron Control in Hydrometallurgy,1986:742-752. |
| [6] | OZBERK E;MAKWANA M;MASTERS I M;PüLLENBERG R BAHL W .Zinc pressure leaching at the Ruhr-Zink refinery[J].HYDROMETALLURGY,1995,39(01):53-61. |
| [7] | UMETSU V;TOZAWA K;SASAKI K .The hydrolysis of ferric sulfate solutions at elevated temperatures[J].Canadian Metallurgical Quarterly,1977,16(01):111-117. |
| [8] | DREISINGER D B;PETERS E .The oxidation of ferrous sulfate by molecular oxygen under zinc pressure-leach conditions[J].HYDROMETALLURGY,1989,22(01):101-119. |
| [9] | Fumihiko HASEGAWA;Kazutero TOZAWA .Solubility of Ferrous Sulfate in Aqueous Solutions at High Temperatures[J].資源と素材,1996(12):879-884. |
| [10] | ARIMA H;AICHI T;KUDO Y;SARUTA K, KANNO M, TOGASHI R.Recent improvement in the hematite precipitation process at the Akita Zinc Company[M].Iron Control Technologies,Canadian Institute of Mining,Metallurgy and Petroleum,Montreal,Canada,2006:123-134. |
| [11] | CHENG T C;DDEMOPOULOS G P;SHIBACHI Y;MASUDA H.The precipitation chemistry and performance of the akita hematite process-An integrated laboratory and industrial scale study[A].Ritchie,2003:1657-1674. |
| [12] | DUTRIZAC J E .Converting jarosite residues into compact hematite products[J].JOM,1990,42:36-39. |
| [13] | PAPANGELAKIS V G;BLAKEY B C;LIAO H.Hematite solubility in sulfate process solutions[A].Springer Netherlands,1994:159-175. |
| [14] | VOIGT B;GOBLER A .Formation of pure hematite by hydrolysis of iron(III)salt solutions under hydrothermal conditions[J].Crystal Research and Technology,1986,21(09):1177-1183. |
| [15] | TINDALL G P;MUIR D M .Effect of E h on the rate and mechanism of the transformation of goethite into hematite in a high temperature acid leach process[J].HYDROMETALLURGY,1998,47(02):377-381. |
| [16] | CHENG T C M;DEMOPOULOS G P.Analysis of the hematite precipitation process from a crystallization point of view[A].Warrendale:TMS,1997:599-617. |
| [17] | M.C. Ruiz;J. Zapata;R. Padilla .Effect of variables on the quality of hematite precipitated from sulfate solutions[J].Hydrometallurgy,2007(1/2):32-39. |
| [18] | CHENG T C M .Production of hematite in acidic zinc sulfate media[D].Canada,Materials Engineering McGill University,2002. |
| [19] | WAGNER C D.Handbook of X-ray photoelectron spectroscopy[M].Perkin-Elmer,1979 |
| [20] | LIU H;PAPANGELAKIS V G .Thermodynamic equilibrium of the O 2-ZnSO 4-H 2 SO 4-H 2 O system from 25 to 250℃[J].FLUID PHASE EQUILIBRIA,2005,234(01):122-130. |
| [21] | DUTRIZAC J E;CHEN T T.Behavior of various impurities during the precipitation of hematite from ferric sulfate solutions at 225 ℃[A].John Wiley & Sons,Inc:489-499. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%