Mixture of ilmenite and high phosphorus iron ore smelted by oxygen-enriched top-blown smelting reduction

Abstract

In order to reasonably utilize the abundant resources of high-phosphorus iron ore and ilmenite in China, the technology of top-blown smelting reduction with oxygen enrichment was used to smelt the mixed ore of high-phosphorus iron and ilmenite. The effect, which is related to basicity, reduction temperature, carbon-oxygen ratio and time of ventilated oxygen to iron recovery, dephosphorization rate, content of iron, phosphorus, sulfur and titanium in pig iron, was investigated in the experiment. The results show that an ideal outcome can be gained in condition of 6:4 ration on Mengqiao concentrate and Huimin iron ore, temperature of 1 500 °C, basicity of 1.3, 1.0 on molar ration of carbon to oxygen, time of 10 min on blowing-oxygen. The outcome is that there is no foamy slag in generation, a good separation of slag and iron, iron recovery with 91.41%, content of phosphorus with 0.27% and tilanium content less than 0.001%. The atmosphere of strong oxidizing in the upper of reduction container and high potential of oxygen in the composition of slag in this technique bring phosphorus, titanium and silicon into slag, which ensures less content of impurity in pig iron.

Keywords

smelting reduction / ilmenite / high phosphorus iron ore / iron recovery / dephosphorization

References

[1] ZhouJ.-c., XueZ.-l., ZhangH.-f., LiZ.-qiang.. Dephosphorization technology research on high phosphorus oolitic hematite [J]. Ironmaking, 2007, 26(2): 40-43

[2] PengH., JiangJ.-qi.. The existing dilemma on China’s import agent system of iron ore [J]. Energy Procedia, 2011, 5: 1478-1481

[3] JinY.-s., JiangT., YangY.-b., LiQ., LiG.-h., GuoY.-feng.. Removal of phosphorus from iron ore by chemical leaching [J]. Journal of Central South University of Technology, 2006, 13(6): 673-677

[4] DelvastoP., BallesterA., MunozJ. A., GonzalezF., BlazquezM. L., IgualJ. M., ValverdeA., Garcia-BalboaC.. Mobilization of phosphorus from iron ore by the bacterium Burkholderia caribensis FeGL03 [J]. Minerals Engineering, 2009, 22(1): 1-9

[5] WangJ.-c., ShenS.-b., KangJ.-h., LiH.-x., GuoZ.-cheng.. Effect of ore solid concentration on the bioleaching of phosphorus from high-phosphorus iron ores using indigenous sulfur-oxidizing bacteria from municipal wastewater [J]. Process Biochemistry, 2010, 45(10): 1624-1631

[6] XiaW.-t., RenZ.-d., GaoY.-feng.. Removal of Phosphorus From high phosphorus iron ores by selective HCl leaching method [J]. Journal of Iron and Steel Research, 2011, 18(5): 1-4

[7] YangJ., Lik., TangA.-t., PanF.-sheng.. Comprehensive utilization of ilmenite resources: Present status and furture prospects [J]. Materials Review, 2003, 17(8): 44-46

[8] WangM.-y., LouT.-p., ZhangL., SuiZ.-tong.. Separation of iron droplets from Titania bearing slag [J]. Journal of Iron and Steel Research, International, 2008, 15(1): 45-48

[9] FuW.-g., WenY.-c., XieH.-en.. Development of intensified technologies of vanadium-bearing titanomagnetite smelting [J]. Journal of Iron and Steel Research, International, 2011, 18(4): 7-10

[10] LiH.-b., WangH., QiY.-l., HuJ.-h., LiY.-ling.. Ilmenite smelted by oxygen-enriched top-blown smelting reduction [J]. Journal of Iron and Steel Research, International, 2011, 18(2): 7-13

[11] Pilote J. HIsmelt®, Adapted Technology for Ti/V-Magnetite [EB/OL]. http://scholar.google.com.hk/scholar?cluster=9324875715150124330&hl=zh-CN&as_sdt=0,5. 2011.

[12] BrotzmannK.. New concepts and methods for iron and steel production [J]. Neue Hutte, 1988, 33(12): 441-447

[13] AndreasO., NikolaA., HeinzE.. Low CO₂ emission technologies for iron and steelmaking as well as titania slag production [J]. Minerals Engineering, 2007, 20(9): 854-861

[14] LiH.-bin.Ilmenite and high phosphorus iron ore smelted by oxygen-enriched top-blown smelting reduction [D], 2011KunmingKunming University of Science and Technology

[15] TianZ.-h., LiB.-h., ZhangX.-m., JiangZ.-hang.. Double slag operation dephosphorization in BOF for producing low phosphorus steel [J]. Journal of Iron and Steel Research, International, 2009, 16(3): 6-14

[16] LÜY.-nan.Study on solid state reduction and high efficient utilization of V-Ti magnetite concentrate [D], 2009ChangshaCentral South University

[17] XuMeng.Fundamental research on coal hot-air rotary hearth furnace process [D], 2006BeijingUniversity of Science and Technology Beijing

[18] HuangX.-gu.Principles of iron and steel metallurgy [M], 20103rd.BeijingMetallurgy Industry Press371-372

[19] DuH.-gui.Principles of smelting vanadium-titanium magnetite by blast furnace [M], 19961st, ed.BeijingScience Press131-132

[20] BisioG., RubattoG.. Process improvements in iron and steel industry by analysis of heat and mass transfer [J]. Energy Conversion and Management, 2002, 43(2): 205-220

[21] MatindeE., HinoM.. Dephosphorization treatment of high phosphorus iron ore by pre-reduction, mechanical crushing and screening methods [J]. ISIJ International, 2011, 51(2): 220-227

[22] WangN., LiangZ.-g., ChenM., ZouZ.-shu.. Phosphorous enrichment in molten adjusted converter slag: Part I. Effect of adjusting technological conditions [J]. Journal of Iron and Steel Research, International, 2011, 18(11): 17-19

[23] LeczoT.. Hlsmelt® technology: The future of ironmaking [J]. Iron and Steel Technology, 2009, 6(3): 33-49

[24] GaoB., YangT.-jun.. Reduction and Re-oxidation behavior of Si during smelting reduction process [J]. Journal of University of Science and Technology Beijing, 2001, 23(5): 401-403