In this study, to promote the application of manganese-containing magnetite, the oxidation induration mechanism for manganese-bearing magnetite concentrate pellets (MBMCP) was investigated. X-ray diffraction, scanning electron microscopy-energy dispersive spectroscopy, and thermogravimetric analyses were carried out to systematically study the phase composition, microstructure, elemental distribution, and oxidation behaviour of the MBMCP. The results indicated that Mn3O4 exerted had a negative effect on the oxidation induration of the pellet. With an increase in the amount of added Mn3O4, the compressive strength and oxidation degree significantly decreased and the porosity increased. The content of the formed Mn-Fe solid solution (MnFe2O4) increased with the increase of Mn3O4, which made the matrix of the MBMCP change from dense to porous, suggesting that the growth of haematite grains was inhibited and the bridging between haematite grains was broken. These results provide the theoretical and technical foundations for the industrial production of MBMCP.
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References
1.
YellishettyMRanjithPGTharumarajahA.Iron ore and steel production trends and material flows in the world: is this really sustainable?. Resour Conserv Recy. 2010;54(12):1084–1094.
2.
PaunovaR.Thermodynamic study of the reduction of titanium magnetite concentrate with solid carbon. Metall Mater Transactions B. 2002;33(4):633–638.
3.
LiWFuGqChuMSet al.Oxidation induration process and kinetics of Hongge vanadium titanium-bearing magnetite pellets. Ironmak Steelmak. 2016;44(4):294–303.
4.
ZhuDQXueYPan JJet al.An investigation into the distinctive sintering performance and consolidation mechanism of limonitic laterite ore. Powder Technol. 2020;367:616–631.
5.
WangSGuoYZhengFet al.Improvement of roasting and metallurgical properties of fluorine-bearing iron concentrate pellets - ScienceDirect. Powder Technol. 2020;376:126–135.
6.
JuJTTangCMXingXDet al.Effect of BaSO4 on the compressive strength and reduction behavior of pellets. Metall Res Technol. 2020;117(2):207.
7.
HuTLvXWBaiGC. Enhanced reduction of coal-containing titanomagnetite concentrates Briquette with multiple layers in Rotary Hearth Furnace. Steel Res Int. 2015;87(4):494–500.
8.
ZhangYZhouYLiuBet al.Roasting characteristics of specularite pellets with modified humic acid based (MHA) binder under different oxygen atmospheres. Powder Technol. 2014;261:279–287.
9.
HuangXFanXChenXet al.A novel blending principle and optimization model for low-carbon and low-cost sintering in ironmaking process. Powder Technol. 2019;355:629–636.
10.
LvWSunZSuZ.Life cycle energy consumption and greenhouse gas emissions of iron pelletizing process in China, a case study. J Cleaner Prod. OCT.1;233:1314–1321.
11.
ZhangQWangYZhangWet al.Energy and resource conservation and air pollution abatement in China’s iron and steel industry. Resour Conserv Recycl. 2019;147:67–84.
12.
HeKWangL.A review of energy use and energy-efficient technologies for the iron and steel industry. Renewable Sustainable Energy Rev. APR;70:1022.
13.
LiWWangNFuGQet al.Effect of V2O5 addition on the oxidation induration process of Hongge vanadium titanomagnetite pellet. Ironmak Steelmak. 2018;45(10):913–918.
14.
Shaik MBSekharCDwarapudiS.Characterization of colemanite and its effect on cold compressive strength and swelling index of iron ore pellets. Min Metall Explor. 2021;38(1):217–231.
15.
LiWFuGQChuMSet al.Influence of MgO on the oxidation and induration of Hongge vanadium titanomagnetite pellets. Ironmak Steelmak. 2019;47(8):1–7.
16.
GaoQJShenYSWeiGet al.Diffusion behavior and distribution regulation of MgO in MgO-bearing pellets. Int J Miner Metall Mater. 2016;23:1011–1018.
17.
ZhangFZhuDQPanJet al.Effect of basicity on the structure characteristics of chromium- nickel bearing iron ore pellets. Powder Technol. 2019;342:409–417.
18.
LvWWangNFuGQet al.Effect of Cr2O3 addition on the oxidation induration mechanism of Hongge vanadium titanomagnetite pellets. Int J Miner Metall Mater. 2018;25(04):391–398.
19.
ZhaoWChuMSFengCet al.Effect of MgO addition on the metallurgical properties of the vanadium-titanium pellet with simulating blast furnace conditions. Iron & Steelmaking. 2020;47(4):388–397.
20.
ZhuDQChunTPanJet al.Influence of basicity and MgO content on metallurgical performances of Brazilian specularite pellets. Int J Miner Process. 2013;125:51–60.
21.
LiWFuGQChuMet al.Investigation of the oxidation induration mechanism of Hongge vanadium titanomagnetite pellets with different Al2O3 additions – ScienceDirect. Powder Technol. 2020;360:555–561.
22.
FuGQLiWChuM.Influence mechanism of SiO2 on the oxidation behavior and induration process of Hongge Vanadium titanomagnetite pellets. Metall Mater Transactions B. 2020;51:114–123.
23.
XueXXJiangTDuanPNet al.Effect of TiO2 on the crushing strength and smelting mechanism of high-chromium vanadium-titanium magnetite pellets. Metall Mater Transactions B Proc Metall Mater Proc Sci. 2016;47:1713–1726.
24.
DwarapudiSGhoshTKTathavadkarVet al.Effect of MgO in the form of magnesite on the quality and microstructure of hematite pellets. Int J Miner Process. 2012: 112–113. 55–62.
25.
ShenFMGaoQJJiangXet al.Effect of magnesia on the compressive strength of pellets. Int J Min Metall Mater. 2014;21(5):431–437.
26.
ZhangJLWangZYXingXDet al.Effect of aluminum oxide on the compressive strength of pellets. J Min Metall Mater: Engl Edition. 2014;4:339–344.
27.
ZhuDYangCPanJet al.Comparison of the oxidation behaviors of high FeO chromite and magnetite concentrates relevant to the induration of ferrous pellets. Metall Mater Transactions B. 2016;47(5):1–12.
