microwave technology for iron ore reduction
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microwave technology for iron ore reduction

microwave technology for iron ore reduction

Over 90% reduction of the iron ore can be achieved in about 10 minutes at temperatures about 1,000 C with 20% excess stoichiometric carbon in the mix. The reduction of iron ore with coal by microwave heating produces a pure, dust-free, and high Btu flue gas that can be used in

(PDF) Reduction of microwave irradiated iron ore particles ...

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 ...

Carbothermal Reduction of Iron Ore Applying Microwave ...

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.

Reduction of iron ore with coal by microwave heating (Book ...

Over 90% reduction of the iron ore can be achieved in about 10 minutes at temperatures about 1,000 C with 20% excess stoichiometric carbon in the mix. The reduction of iron ore with coal by microwave heating produces a pure, dust-free, and high Btu flue gas that can be used in related thermal operations.

Microwave Application in Carbothermic Reduction of Iron Ores

Microwave Application in Carbothermic Reduction of Iron Ores. 1) Department of Materials Engineering, University of Wollongong 2) Department of Metallurgy, University of Science and Technology Beijing. Reduction of hematite fines and magnetite concentrates containing carbon using microwave energy was investigated.

Reduction of iron ore with coal by microwave heating

Nov 01, 1996  Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer. Microwave heating and reduction tests were run on composite green balls made from coal and magnetite concentrate. Bench-scale tests were run on both powdered and pelletized feeds using a 15 kW microwave generator.

Knowledge Portal-7365-Microwave assisted reduction of iron ...

1. Development of technology of microwave assisted beneficiation of iron ore fines/slimes using microwave-assisted reduction process. 2. Pilot plant studies and scaling up for commercial production with the help of an industrial partner. 3. Involvement and development of student teams at IIT Madras and IIT Kanpur with JSW RD and NMDC. 4.

(PDF) Application of Microwave Energy for Production of ...

Waste polymer reduction technology is an. ... Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer ...

REDUCTION OF IRON ORE BY CHARCOAL UNDER

Reduction Of Iron Ore By Charcoal Under Microwave Irradiation 45 Table 2. XRF data of the sample (2000 Watt) Based on table 2, the longer irradiation time, the greater Fe content in the sample. The highest Fe content was reached by microwaves heating for 50 minutes in 2000 Watt power supply, approximately 77.29%.

Influence of microwave heating on the microstructures of ...

Jun 14, 2016  A comparison of the iron ore oxidised pellets with coal (out-proportioning) by conventional heating and microwave heating was carried out in this paper. Microstructure transformations during reduction process were investigated by optical microscopy and scanning electron microscope with energy dispersive spectrometry analysis.

Reduction of iron ore with coal by microwave heating (Book ...

Over 90% reduction of the iron ore can be achieved in about 10 minutes at temperatures about 1,000 C with 20% excess stoichiometric carbon in the mix. The reduction of iron ore with coal by microwave heating produces a pure, dust-free, and high Btu flue gas that can be used in related thermal operations.

Reduction of iron ore with coal by microwave heating

Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer. Microwave heating and reduction tests were run on composite green balls made from coal and magnetite concentrate. Bench-scale tests were run on both powdered and pelletized feeds using a 15 kW microwave generator.

Microwaves Applied to Carbothermic Reduction of Iron Ore ...

Results of reduction tests conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as the reducing agent with a conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume.

Application of Microwave Energy for Production of Iron ...

The reduction of iron oxides using microwave energy as heating source has been previously investigated. Ishizaki et al. (2006) investigated the microwave reduction of magnetite ore–coal composite pellets in a nitrogen gas atmosphere. They observed by means of XRD analysis that the reduction of magnetite started at about 800°C and

(PDF) Application of Microwave Energy for Production of ...

Waste polymer reduction technology is an. ... Microwave heating of iron ore was investigated as an alternative to conventional reduction processes to solve the problem of slow heat transfer ...

Microwave Carbothermic Reduction of Low-Grade Iron Ore ...

Jun 15, 2020  This study evaluates the carbothermal microwave reduction of low-grade banded hematite jasper iron ore for the preparation of potential feedstock for the alternative iron-making process. The coal sample act as transparent material to microwave irradiation at low temperature, however, above 600 °C, an exponential rise in temperature with a heating rate of ~ 220 °C/min was

Knowledge Portal-7365-Microwave assisted reduction of iron ...

1. Development of technology of microwave assisted beneficiation of iron ore fines/slimes using microwave-assisted reduction process. 2. Pilot plant studies and scaling up for commercial production with the help of an industrial partner. 3. Involvement and development of student teams at IIT Madras and IIT Kanpur with JSW RD and NMDC. 4.

(PDF) Microwave reduction of a nickeliferous laterite ore ...

The effect of the sample mass on the reduction degree has to be correlated with the temperatures of the respective samples achieved under microwave radiation, as shown in Fig. 5.The transformation of iron oxide phases during the reduction of a 10 g laterite sample with twice the stoichiometric addition of carbon at 800 W is presented in Fig. 17 ...

Microwave Heating Applications in Mineral Processing

reduction in grinding resistance when the ore was heated to 650°C and then rapidly cooled, however, this was greatly offset by the energy required to heat the material. It was suggested by Manser, 198315, that an increase in tin recovery of 1% would offset this cost in the case of the South Crofty ore, due to the value of the recovered minerals.

Microwave reduction of a nickeliferous laterite ore ...

Jul 01, 2012  Highlights Microwave reduction of a hematitic nickeliferous laterite ore. Measurement of real and imaginary permittivity (ε′, ε″) of laterite–lignite mixture. laterite–lignite mixture is an excellent microwave absorber heated to 900 °C. A 70% carbothermic reduction of laterite can be achieved.

Microwave assisted reduction of iron ore/slimes: An ...

Microwave assisted reduction of iron ore/slimes: An innovative and cost effective approach for dry beneficiation for maximization of iron recovery from low grade ores. Project Images. Image Caption:Design of proposed Pilot Plant Set-up for iron ore beneficiation using rotary kiln based microwave furnace. Web Abstract

Novel Direct Steelmaking by Combining Microwave, Electric ...

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.

Jiann-Tang HWANG -- Microwave steel manufacture

In a matter of minutes, the microwave energy reduced the iron ore to iron, and the electric arc furnace smelted the iron and coal into steel. The process could give the steel industry the same benefits that a microwave gives the typical family, says Hwang, an associate professor of materials science and engineering and director of Michigan Tech ...

Ironmaking 101 – From Ore to Iron with Smelting and Direct ...

Oct 17, 2017  Smelting Reduction. Figure 2: The smelt reduction vessel (SRV) is the core technology component of the Hismelt process. Source: RioTinto While years of ironmaking technology innovations have optimized blast furnace productivity, two alternative processes—smelting reduction and direct iron reduction— are growing in adoption. The alternative processes are touted as more environmentally ...

Microwave assisted reduction of iron ore/slimes: An ...

Microwave assisted reduction of iron ore/slimes: An innovative and cost effective approach for dry beneficiation for maximization of iron recovery from low grade ores. Project Images. Image Caption:Design of proposed Pilot Plant Set-up for iron ore beneficiation using rotary kiln based microwave furnace. Web Abstract

Novel Direct Steelmaking by Combining Microwave, Electric ...

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.

Utilisation of microwave energy in carbothermic reduction ...

In this work, microwave heating has been applied to the carbothermic reduction of hematite. The obtained results have show that it is possible to heat iron-carbon mixture above the reduction temperature, and the reaction rates have been compared to those obtained employing conventional heating with the same mixtures

Jiann-Tang HWANG -- Microwave steel manufacture

In a matter of minutes, the microwave energy reduced the iron ore to iron, and the electric arc furnace smelted the iron and coal into steel. The process could give the steel industry the same benefits that a microwave gives the typical family, says Hwang, an associate professor of materials science and engineering and director of Michigan Tech ...

Microwave-Absorbing Characteristics and XRD ...

of microwave heating in all different kinds of fields. For the microwave processing of ilmenite or ilmenite concentrate, Kelly and Rowson (1995) investigated the microwave reduction of the oxidized ilimenite concentrate, showing that the oxidation and reduction of iron in ilmenite concentrate between the ferrous and ferric states has been found to

Microwave Heating Applications in Mineral Processing

reduction in grinding resistance when the ore was heated to 650°C and then rapidly cooled, however, this was greatly offset by the energy required to heat the material. It was suggested by Manser, 198315, that an increase in tin recovery of 1% would offset this cost in the case of the South Crofty ore, due to the value of the recovered minerals.

Research Group for of Iron and Steelmaking, Indian ...

2. Microwave assisted reduction roasting based beneficiation of lean quality iron ore and coal fines. (Supported by Ministry of Human Resources/JSW Steel, NMDC Ltd. project yet to start) 3. Static and Dynamic control of BOF Steelmaking process. 4. Development of dynamic control model for RH degassing process. 5.

Nikhil Dhawan - Indian Institute of Technology, Roorkee

62. Shukla, N., Dhawan, N., 2020, Rapid microwave processing of discarded tubular lights for extraction of rare earth values, Process Safety, and Environmental ...

Ironmaking 101 – From Ore to Iron with Smelting and Direct ...

Oct 17, 2017  Smelting Reduction. Figure 2: The smelt reduction vessel (SRV) is the core technology component of the Hismelt process. Source: RioTinto While years of ironmaking technology innovations have optimized blast furnace productivity, two alternative processes—smelting reduction and direct iron reduction— are growing in adoption. The alternative processes are touted as more environmentally ...

Direct Reduced Iron - Midrex Technologies, Inc.

Apr 14, 2021  Direct Reduced Iron. The need for a dependable and clean source of iron will continue to increase as steelmaking grows and expands globally. Regardless of the steelmaking route, there is a form of direct reduced iron (DRI) for every application. DRI is a premium ore-based metallic (OBM) raw material made by removing chemically-bound oxygen from ...

Project FILER (Flexible Input Low Emission Reduction of ...

iron ore. Microwave heating in combination with radiant heating was shown to accelerate the reaction rate and allow the reduction to proceed at lower temperatures thn when using a conventional heating alone. It was possible to reduce iron oxide at and in less than 10 600°C minutes.

Dephosphorization of Iron Ore Bearing High Phosphorous by ...

Dephosphorization of Iron Ore Bearing High Phosphorous by Carbothermic Reduction Assisted with Microwave and Magnetic Separation Jiaqing YIN, Xuewei LV,* Chenguang BAI, Guibao QIU, Shiwei MA and Bing XIE School of Materials Science and Engineering, Chongqing University, 400044 China. E-mail: [email protected]

Improvement in gold grade from iron-oxide mineral using ...

Microwave has a wide range of applications in mineral technology, metallurgy, etc. It is an established fact that microwave energy has potential for the speedy and efficient heating of minerals and in a commercial context may provide savings in both time and energy. Microwave heating is being developed as a potential thermal pre-treatment process, because of its unique advantages over the ...

Novel Drying Process Assisted by Microwave to Iron Ore ...

By different mechanisms, iron ore and moisture are the materials that control the heating by the microwave 12, 19. In the case of iron ore pellets, Athayde et al. (2018) 13 explained that moisture plays an important role as an better absorber of microwave and convert the energy into heat. Despite of other carbon based materials, coal is a poor ...

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