Magnetization roasting of waste iron ore beneficiation plant tailings using sawdust biomass; A novel approach to produce metallurgical grade pellets

Sahu, Sachida Nanda; Meikap, B.C.; Biswal, S.K.

doi:10.1016/j.jclepro.2022.130894

Cited by 19 publications

(3 citation statements)

References 63 publications

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“…As per the Steel Policy 2017-18, around Journal of Mines, Metals and Fuels, 71 (11): 1817-1825; 2023. DOI: 10.18311/jmmf/2023/31100 450 MTPA (million tons per annum) of high-grade iron ore resources are required to meet the steel demand of 300 MTPA in 2030 2 . However, as it is of lateritic origin with goethite abundance, a huge number of fines (-10 mm size) are produced in the size reduction step.…”

Section: Introductionmentioning

confidence: 99%

Applicability of the Teetered Bed Separator for Beneficiating Indian Iron Ore Fines: An Experimental Study

Pradhan,

Behera,

Sahoo

et al. 2023

jmmf

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Higher alumina and lower iron content in Indian iron ore fines is a major problem for its effective utilization in the ironmaking process. India is the second largest steel producer in the world with an annual production of 200 million tons in the year 2020, whereas iron ore beneficiation of this country is highly derisory. Only 52 concentrators are required to produce 220 MTPA of iron ore. Most of the concentrator's benefits are limited to sizing and washing. In recent years, the Teetered Bed Separator (TBS) has gained significant importance and appeared as a viable option for beneficiating a variety of fine minerals. So, a systematic study has been carried out to verify the suitability of the TBS to reduce the alumina content and improve the iron grade in Indian iron ore fines. As the performance of gravity separation processes strongly depends on the feed particle size, a size-by-size beneficiation study was carried out to delineate the role of particle size on the performance of the TBS. Based on this study, the TBS is established to be a possible alternative to the other conventional equipment used for the beneficiation of iron ore fines.

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Section: Introductionmentioning

confidence: 99%

Applicability of the Teetered Bed Separator for Beneficiating Indian Iron Ore Fines: An Experimental Study

Pradhan,

Behera,

Sahoo

et al. 2023

jmmf

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“…Qiu et al [16] further verified the feasibility of using fir sawdust as a reductant in iron tailings, and pointed out that the biomass oil generated during magnetization roasting would affect the operation of industrial equipment. In addition, sawdust [17,18], banana tree bark [19], leaf litters [19,20], etc., have been verified as green reductants that can be used for the reduction roasting of iron minerals, and can obtain good beneficiation indicators. Furthermore, these studies show that the reducing gases produced by pyrolysis during biomass roasting are mainly CO and H 2 , which are the main reductants for the reduction of iron minerals [13,15,16].…”

Section: Introductionmentioning

confidence: 99%

Waste Corn Straw as a Green Reductant for Hematite Reduction Roasting: Phase Transformation, Microstructure Evolution and Process Mechanism

Zhang,

Sun,

Jin

et al. 2023

Minerals

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Mineral phase transformation (MPT) of hematite to magnetite by reduction roasting is a viable means of developing refractory iron ore resources. However, conventional coal-based reductants are prone to high carbon emissions and environmental pollution. Biomass, as a renewable green reductant, can make the MPT process more environmentally friendly while reducing the environmental impact associated with processing agricultural waste. This study systematically explored the feasibility of waste corn straw as a green reductant for hematite. Under the conditions of 8 min, 700 °C, a mass ratio of corn straw to hematite of 1:4, and a N2 flow rate of 300 mL/min, the best beneficiation indexes were achieved, with an iron grade of 69.82% and an iron recovery of 93.95%. During the MPT process, hematite was reduced under the action of corn straw, and the new magnetite particles were loose and porous, showing an acicular crystal structure. Meanwhile, the corn straw was converted into porous biochar.

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“…Vlaimir et al [24] discussed the experimental analysis and kinetic modeling of iron ore reduction using sawdust and discovered that the optimal biomass dose was 30%. In addition, the application of biomass in non-blast furnaces mainly played the role of a reducing agent [25][26][27]. The application of biomass is not only used to treat pure iron-bearing minerals but also refractory iron ores.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Waste Straw Biomass in Suspension Magnetization Roasting of Refractory Iron Ore: Iron Recovery, Gas Analysis and Roasted Product Characterization

Cao,

Sun,

Gao

et al. 2023

Sustainability

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The straw-type biomass, as a green and alternative reductant for the suspension magnetization roasting (SMR) of iron ores, is proposed. The roasted products are investigated at a roasting temperature of 750 °C, the roasting time of 7.5 min and the biomass dose of 25%. The iron phase results indicate that hematite ores were reduced to magnetite by the biomass, and the magnetization transformation increased from 0.64 A·m2·g−1 to 36.93 A·m2·g−1. The iron ore microstructure evolutions of holes and fissures are detected by SEM-EDS. The biomass pyrolyzed to form CO2, CO, CH4, H2O, H2, C=O, benzene skeleton, C-Hand C-O compounds at 200–450 °C, while the mass loss of the magnetization roasting process occurred at 450–750 °C by using TG-FTIR. The GC/MS results showed that the organic gases preferred to produce the O-heterocycles at 329 °C while the hydrocarbons were dominant at the high temperature of 820 °C for the hematite ore and biomass mixture. The gas composition analysis explained that the reducing gaseous products (CO, CH4 and H2) were used as a reductant and consumed obviously by hematite ore in the SMR process. The innovative utilization of biomass waste was effective for iron recovery of hematite ore and contributes to the reduction of greenhouse gases and the protection of the environment.

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Magnetization roasting of waste iron ore beneficiation plant tailings using sawdust biomass; A novel approach to produce metallurgical grade pellets

Cited by 19 publications

References 63 publications

Applicability of the Teetered Bed Separator for Beneficiating Indian Iron Ore Fines: An Experimental Study

Applicability of the Teetered Bed Separator for Beneficiating Indian Iron Ore Fines: An Experimental Study

Waste Corn Straw as a Green Reductant for Hematite Reduction Roasting: Phase Transformation, Microstructure Evolution and Process Mechanism

Utilization of Waste Straw Biomass in Suspension Magnetization Roasting of Refractory Iron Ore: Iron Recovery, Gas Analysis and Roasted Product Characterization

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