The effects of super-gravity field on metal–slag separation at different gravity coefficients were investigated in this study. In a super-gravity field, the liquid metal concentrated along the direction of super-gravity, while the molten slag migrated and aggregated along the opposite direction thereafter separated from the metal. Moreover, a straight interface between the metal and slag appeared in the perpendicular direction to the super-gravity. Consequently, increasing the gravity coefficient could definitely increase the driving force of phase separation between metal and slag, and so enhance the removal of oxide and the purity of metal significantly.
Get full access to this article
View all access options for this article.
References
1.
ChengC. Y.MisraV. N.CloughJ.MunR.: ‘Dephosphorisation of western Australian iron ore by hydrometallurgical process’, Miner. Eng., 1999, 12, (9), 1083–1092. doi: 10.1016/S0892-6875(99)00093-X
2.
HuT.LvX. W.BaiC. G.LunZ. G.QiuG. B.: ‘Reduction behavior of Panzhihua titanomagnetite concentrates with coal’, Metall. Mater. Trans. B, 2013, 44, (2), 252–260. doi: 10.1007/s11663-012-9783-7
3.
LiuR.XueX. X.JiangT.ZhangS. H.HuangD. W.: ‘Comprehensive utilization of ludwigite and its prospect', Multi. Util. Miner. Res., 2006, 2, 33.
4.
SongS.Campos-ToroE. F.ZhangY.Lopez-valdiviesoA.: ‘Morphological and mineralogical characterizations of oolitic iron ore in the Exi region, China’, Int. J. Miner. Metall. Mater., 2013, 20, (2), 113–118. doi: 10.1007/s12613-013-0701-z
5.
GaoJ. T.GuoL.GuoZ. C.: ‘Separation of P phase and Fe phase in high phosphorus oolitic iron ore by ultrafine grinding and gaseous reduction in a rotary furnace’, Metall. Mater. Trans. B, 2015, 46, (5), 2180–2189. doi: 10.1007/s11663-015-0400-4
6.
LiC.LiangB.GuoL. H.WuZ. B.: ‘Effect of mechanical activation on the dissolution of Panzhihua ilmenite’, Miner. Eng., 2006, 19, 1430–1438. doi: 10.1016/j.mineng.2006.02.005
7.
WuJ.WenZ.ChenM.: ‘Development of technologies for high phosphorus oolitic hematite utilization’, Steel Res. Int., 2011, 82, (5), 494–500. doi: 10.1002/srin.201100040
8.
SunS.JahanshahiS.: ‘Redox equilibria and kinetics of gas-slag reactions’, Metall. Mater. Trans. B, 2000, 31, (5), 937–943. doi: 10.1007/s11663-000-0070-7
9.
LiuL.CuiC. M.ZhangX. P.: ‘Pyrometallurgical separation of boron from iron in ludwigite ore’, ISIJ Int., 1998, 38, (10), 1077–1079. doi: 10.2355/isijinternational.38.1077
10.
BaiS. J.WenS. M.LiuD. W.ZhangW. D.XianY. J.: ‘Catalyzing carbothermic reduction of siderite ore with high content of phosphorus by adding sodium carbonate’, ISIJ Int., 2011, 51, (10), 1601–1607. doi: 10.2355/isijinternational.51.1601
11.
TangH. Q.LiuD. W.ZhangH. Y.GuoZ. C.: ‘Effect of microwave treatment upon processing oolitic high phosphorus iron ore for phosphorus removal’, Metall. Mater. Trans. B, 2014, 45, (5), 1683–1694. doi: 10.1007/s11663-014-0072-5
12.
WangG.WangJ. S.DingY. G.MaS.XueQ. G.: ‘New separation method of boron and iron from ludwigite based on carbon bearing pellet reduction and melting technology’, ISIJ Int., 2012, 52, (1), 45–51. doi: 10.2355/isijinternational.52.45
13.
IwamasaP. K.FruehanR. J.: ‘Separation of metal droplets from slag’, ISIJ Int., 1996, 36, (11), 1319–1327. doi: 10.2355/isijinternational.36.1319
14.
HanZ. J.HolappaL.: ‘Bubble bursting phenomenon in gas/metal/slag systems’, Metall. Mater. Trans. B, 2003, 34, (5), 525–532. doi: 10.1007/s11663-003-0020-2
15.
RahimipourM. R.SobhaniM.: ‘Evaluation of centrifugal casting process parameters for in situ fabricated functionally gradient Fe-TiC composite’, Metall. Mater. Trans. B, 2013, 44, (5), 1120–1123. doi: 10.1007/s11663-013-9903-z
16.
RajanT. P. D.PillaiR. M.PaiB. C.: ‘Centrifugal casting of functionally graded aluminium matrix composite components’, Int. J. Cast Metal Res., 2008, 21, 214–218. doi: 10.1179/136404608X361972
17.
ZhaoL. X.GuoZ. C.WangZ.WangM. Y.: ‘Influences of super-gravity field on aluminum grain refining’, Metall. Mater. Trans. A, 2010, 41, (3), 670–675. doi: 10.1007/s11661-009-0130-9
18.
GaoJ. T.ZhongY. W.GuoZ. C.: ‘Selective precipitation and concentrating of perovskite crystals from titanium-bearing slag melt in supergravity field’, Metall. Mater. Trans. B, 2016, 47, (4), 2459–2467. doi: 10.1007/s11663-016-0716-8
19.
NyokaM.AkdoganG.EricR. H.SutcliffeN.: ‘Mixing and solid-liquid mass-transfer rates in a creusot-loire uddeholm vessel: a water model case study’, Metall. Mater. Trans. B, 2003, 34, (6), 833–842. doi: 10.1007/s11663-003-0089-7
LiuQ. M.JiaoY. N.YangY. S.HuZ. Q.: ‘Theoretical analysis of the particle gradient distribution in centrifugal field during solidification’, Metall. Mater. Trans. B, 1996, 27, (6), 1025–1029. doi: 10.1007/s11663-996-0017-8
