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microwave technology for iron ore reduction

Developing a new process to agglomerate secondary raw material fines ...

used to utilise iron ore fines in the pig iron production in cupola furnaces or to recover the metal content (Fe, Zn, Cr, Ni, Mo, etc.) of dusts and sludges. Currently the recyclability of many process by-products and residues like disintegrated ladle furna-ce slags, dusts or sludges is still limited by their fine particle size

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Upgrading Low-Grade Iron Ore through Gangue Removal by a Combined ...

The iron forms (α-FeOOH) in the original iron ore changed to Fe 2 O 3 after the samples had been treated. Both the specific surface area and pore volume values of the original iron ore (2-80 m 2 /g and <0.01 to 0.20 cm 3 /g) decreased to <1 to 15 cm 2 /g and <0.01 to 0.10 cm 3 /g, respectively, for all samples obtained after treatment. This ...

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Microwave Heating Applications in Mineral Processing

Scott et al., 2007, studied the effects of microwave treatment on the liberation spectrum of a rod-milled South African carbonatite ore.The treated ore was processed for 0.5 s at 10.5 kW in a single mode microwave cavity in batches of 1 kg. The treated and untreated ore were subsequently grinded to 80%-800 μm.

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Magnetic properties of an iron ore sample after microwave heating

the effect of microwave radiation on the magnetic properties of iron ore was investigated. increasing in radiation time up to 60 s results increasing total magnetism saturation and remnant magnetization. with further increasing in microwave radiation time to 120 s, the total magnetism saturation and remnant magnetization were decreased. .

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Microwave Vacuum Carbothermic Reduction and Sulphidation of A Low Grade ...

Microwave Vacuum Reduction Processing (MVRP) of a nickeliferous silicate laterite ore,, followed by magnetic separation was performed. The variables investigated included:, processing time, microwave power, system pressure, use of argon as an inert gas, charcoal,

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Reduction of Microwave Irradiated Iron Ore Particles in CO - J-STAGE

The effect of microwave (2.45 GHz) pre-treatment on the reduction of magneto-hematite ore particles in CO was investigated. It was found that the presence of magnetite in the ore has considerable effect on the microwave treatment and that the oxidation of the goethite, present in the ore, is obtained after the magneto-hematite grains are almost entirely oxidized to hematite.

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Yantai Products - Page 8 - ecplaza

the high temperature microwave iron ore reduction equipment can be widely used for the high temperature reduction of iron ore,iron ore powdery, red iron ore,brown iron ore,ilmenite,etc. ... Yantai FR Flame Retardant Technology Co.,Ltd. China Main Item Magnesium hydroxide, Magnesium Oxide. Business Type Manufacturer, Exporter, Service.

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China's blast furnace capacity will increase by 6.92 million mt in 2020 ...

Due to irregularities in replacement, the Ministry of Industry and Information Technology suspended the approval of new capacity replacement projects at the beginning of 2020, and reviewed approved projects. For more updates on the China iron ore sector, please refer to the latest December edition of the China Iron Ore Monthly Monitor.

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Energy-efficient green route to magnesium production - Phys

Internal heating and contact point heating, which are microwave characteristics, were observed, and the average reaction temperature for this smelting was lowered from the conventional 1,200 -...

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Application of Microwave Energy for Production of Iron Nuggets from the ...

domestic microwave oven and the extent of reduction was determined after 40 min of irradiation. It was observed that highly carburised premium grade iron nuggets can be produced from the Pudo iron ore using 'pito' waste (both charred and uncharred) and its blends with HDPE as reductant.

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Conversion of Mill Scale Waste into Valuable Products via ... - Hindawi

Conversion of Mill Scale Waste into Valuable Products via Carbothermic Reduction: Mill scale is one of waste materials which is produced as a result of hot rolling of steel in all steel companies. On the other hand, mill scale is considered a rich iron source with minimum impurities. This work aims at conversion of mill scale by adjusting smelting processes to produce different valuable products.

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Novel Direct Steelmaking by Combining Microwave, Electric Arc, and ...

In addition, iron oxides from scrap and waste could be utilized in a similar manner as the iron ore concentrates. Iron bearing wastes such as sludges, slags, and dusts are seen as supplemental feedstock to recycling furnaces using this technology. This technology has the potential to (a) save up to 25% of the energy con­

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Microwave catalyzed carbothermic reduction of zinc oxide and zinc ...

The effect of microwave energy on the reduction of zinc oxide and zinc ferrite was investigated. The results indicated that the temperatures required to initiate zinc oxide and zinc ferrite reduction under ... Faculty of Technology, University of Oulu, Oulu, ... Thermally assisted liberation of high phosphorus oolitic iron ore: a comparison ...

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Metal powder: zero-carbon fuel for the future?

The idea is to get this energy out of the iron whenever needed by oxidizing the iron back to iron oxide. In times of excess energy from wind, sun or water, this iron ore could be again reduced to iron and the energy stored. The scientists speak of combustion when describing the "burning", meaning oxidation, of the iron back to iron ore.

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Minerals Engineering Conferences - Comminution '16

Selected papers from the conference have been published in Volume 103-104 (April 2017), a special issue of Minerals Engineering. The papers can be viewed and downloaded at ScienceDirect. Prof Malcolm Powell has kindly given us permission to publish his keynote presentation: "Comminution modelling in the context of integrated process prediction".

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Evaluation of the Use of Microwave Energy on The Reduction of Iron Ore ...

heating by microwave energy in ironmaking processes consists in a promising new method developed in recent decades and is considered a clean technology. Microwave energy is a non-ionizing electromagnetic radiation with frequencies in the range 0.3-300 GHz, although the 2.45 GHz frequency being commonly used in industrial applications.

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The effect of microwave radiation on mineral processing

Synopsis Between 50% and 70% of the total energy used in the extraction process may be attributed to comminution. Microwave pre-treatment has been suggested as a means to decrease the energy

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Remaking the global steel industry Lower-cost natural gas ... - Deloitte

Pig iron/Blast furnace Direct Reduced Iron (DRI) 831 6 6 41 Source: Deloitte Touche Tohmatsu Limited (DTTL) Global Manufacturing Industry group data analysis of World Steel Association Iron production. December 2012. 3 Edmund Newton. Iron Determination: DRI Technology Takes Off with the Availability of Affordable Natural Gas. Forward Online: Global

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Comparative Analysis of the Effect of Microwave Pre-treatment on the ...

The microwave-pretreated soft and friable manganese ore samples showed a 47.82 percent reduction in d80 during grinding and higher manganese recovery of 42.46 percent during liberation analysis. The microwave pretreatment and milling of hard and banded iron ore reduced the d80 by 20.83 percent, but no improvement was observed in mineral liberation.

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Bauxite enrichment by microwave-magnetising roasting using sawdust as ...

microwave energy and charcoal as a reducing agent to convert non-magnetic iron oxides in bauxite to magnetite. The authors determined the dielectric properties of bauxite, and the data indicated that it had appreciable microwave absorption properties. Following reduction, about 58% of the iron was removed, generating a non-magnetic fraction

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C-Tech Innovation - Our Dedicated Low Carbon Technology Lab

TECHNOLOGY FOCUS Microwave Assisted Chemistry. The use of microwaves in catalytic reactions frequently gives faster reaction rates, greater selectivity, and higher yields. ... C-Tech Innovation have further successfully demonstrated reduction of iron ore and iron containing ores such as ilmenite using H2, CO and mixtures. This work demonstrated ...

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‪Mamdouh Omran‬ - ‪Google Scholar‬

Separation and Purification Technology ... Kinetics characteristics and microwave reduction behavior of walnut shell-pyrolusite blends. K Li, Q Jiang, G Chen, L Gao, J Peng, Q Chen, S Koppala, M Omran, ... Bioresource Technology 319, 124172, 2021. 43: 2021: Improvement of phosphorus removal from iron ore using combined microwave pretreatment ...

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ZDVWH Metallurgical Processes of Fluidized - Institute of Physics

Microwave radiation is a relatively new source of energy in the, pyrometallurgical process. In this study, the application of microwaves in the, carbothermic reductive roasting of a nickeliferous hematitic laterite ore and a red mud, are investigated. The effective microwave heating (at temperatures above 900 oC) of,

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Gasification Behavior of Phosphorus during Hydrogen-rich Sintering of ...

In addition, the increase in the number of pores larger than 5 mm in sinter improves the air permeability of the bed.24-26)Based on the hydrogen-rich sintering technology, the good reduction performance of hydrogen makes the reduction atmosphere in the sintering bed enhanced, and the combustion of hydrogen enriched gas in the sintering bed broad...

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C-Tech: Flexible input low emission reduction of ore

Laboratory scale studies showed the potential for using hydrogen as the direct reducing agent for iron ore. Microwave heating in combination with radiant heating was shown to accelerate the...

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The Effect of Grain Size on Microwave Interaction of Magnetite ...

The pellets prepared with various particle size powders were subjected to microwave treatment at different times. Results: Temperature of the pellet produced with powders between -212 +150 μm grain sizes and -45 μm were measured as 837.5°C at 304th second and 945.9°C at 210th second respectively.

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Evaluation of Heat Absorption in Iron Ore Using Microwave Energy Source ...

A viable alternative for reducing the phosphorus content of these residue is to use the acid leaching process which is considered an economical process for the dephosphorization of the iron ore, however, depending on the way the element phosphorus is contained in the ore it will demand additional energy.

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Optimization of hybrid microwave reduction roasting of low grade iron ...

The reduction of iron ore using cow dung has introduced a new era because of its contribution to energy and emission reduction. Cow dung (fixed carbon: 9.33%, volatile matter 42.76%) used as the reductant in the reduction roasting of low grade iron ore (Fe 44.53%) in a hybrid microwave furnace with a frequency of 2.45GHz and maximum power of 4kW.

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US9752206B2 - Plasma heated furnace for iron ore pellet ... - Google

in the present pelletizing apparatus, the induration of iron ore concentrate pellets is achieved in a tunnel furnace heated by plasma torches, wherein the generation of co2 by the conventional iron...

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Marcelo Breda Mourão - Homepage - University of São Paulo

Takano, C; Mourão, M.B.; Comparison of high temperature behavior of self-reducing pellets produced from iron ore with that of dust from sintering plant; ISIJ INT 41: S22-S26 Suppl. S 2001 Mourão, M.B.; Kinetics and mechanism of reactions between iron oxides and iron-carbon melts ; steel research 71 (2000) n° 1+2, pp. 3-8.

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Microwave Frequency Effect for Reduction of Magnetite

ric heating by microwave during metal powder sintering was reported [2]. The application of microwaves in the iron industry may be characterized by a high potential for an essential reduction of carbon dioxide emission. Iron-ore refinement using blast furnaces was realized with the same basic furnace structurebased on the same principle

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Rio Tinto investigating low-carbon sustainable steel production

Rio Tinto has developed a new process that combines sustainable biomass with microwave technology to convert iron ore to metallic iron during the steelmaking process. The process is currently undergoing further testing in a small-scale pilot plant, with the potential to be scaled up commercially to process Rio Tinto's iron ore fines if successful.

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Microwave assisted reduction of iron ore/slimes: An innovative and cost ...

The proposed project aims at the study of microwave assisted reduction of lean quality Indian iron ore fines mixed with thermal grade coal fines under various operating conditions at bench scale and further scale up to pilot plant scale with the help of industrial partners (JSW/NMDC Ltd).

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Carbothermal Reduction of Iron Ore Applying Microwave Energy

This paper presents the results of a study on carbothermal reduction of iron ore made under the microwave field in equipment specially developed for this purpose. The equipment allows the control of radiated and reflected microwave power, and therefore measures the microwave energy actually applied to the load in the reduction process.

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A new plan for Red Chris, cyanide reduction and Zijin's lithium acquisition

The company has developed new technology using raw, sustainable biomass with microwave technology to convert iron ore to metallic iron during the steelmaking process and is now testing it in a small-scale pilot plant. The process uses biomass instead of coal as a chemical reductant.

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A new process of smelting laterite by lowtemperature reduction and ...

A new process of smelting laterite by lowtemperature reduction and microwave irradiation Wang Lei, Guo Peimin, Kong Lingbing; Affiliations ... Since nickel oxide can be reduced more easily than iron oxide, the nickel content of the produced ferronickel alloy increases significantly when the quantity of coal that is mixed with laterite ore is ...

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microwave technology for iron ore reduction

Novel Direct Steelmaking by Combining Microwave, Electric Arc, and Exothermal Heating Technologies (Continued) The process is based on the capability of microwaves to heat the agglomerates to temperatures sufficiently high for the rapid reduction of the iron oxide component (crushed and ground iron ore) by the coal. Learn More

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metals-10-00571.pdf - metals Article Recovery of Gold from...

Metals 2020, 10, 571 3 of 17 conditions, using a microwave system. Furthermore, to increase the recovery of gold, nitric acid was used during microwave-assisted leaching. 2. Materials and Methods 2.1. Refractory Gold ore and Concentrates The refractory gold ore and concentrate were obtained from a gold mine in Haenam, Korea. Refractory gold ores, including sulfide minerals such as pyrite and ...

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Reduction of Microwave Irradiated Iron Ore Particles in CO - J-STAGE

The results of the reduction tests show that microwave treatment enhances reduction but benefit optima exist. In the present ore optimum reduction was obtained for an irradiation of 6 min at a power level of 1 300 W.

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Steelmakers drawn to Iberian promise of green hydrogen for DRI projects

Rio Tinto is looking at scaling up a project using Pilbara iron ore resources and biomass to form briquettes with microwave technology to be processed in a melter to use in existing steelmaking and EAF processes, said Simon Downes, general manager for steel decarbonization, at the S&P Global Platts Hydrogen Markets Europe conference on Nov. 26.

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