Microwaves Applied to Carbothermic Reduction …
09.05.2016 · 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.
Microwave Iron Direct Reduced Carbon Romania
Field Microwave Iron Direct Reduced Carbon Romania Iron powder addition to oil samples causes a decrease in the polar components such as carboxylic and phenolic acids of oil and the viscosity of oil can be reduced significantly because of the magnetic fields created by iron powders. Pencil Graphite Electrodes A Versatile Tool In
Direct reduced iron - Wikipedia
Direct reduced iron, also called sponge iron, is produced from the direct reduction of iron ore to iron by a reducing gas or elemental carbon produced from natural gas or coal. Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below the melting point of iron. Reduced iron derives its name from these processes, …
Direct reduced iron process - tec-science
The heart of the direct reduction is the shaft furnace, which is filled from the top with lump ore and pellets. Carbon monoxide and hydrogen are used to dissolve out the oxygen in the iron ores. In contrast to the blast furnace process, however, these reduction gases do not result from the combustion of coke. Instead, these reducing agents are produced from natural gas by catalysis …
EXPERIMENTAL STUDY ON IRON RECOVERY BY MICROWAVE …
EXPERIMENTAL STUDY ON IRON RECOVERY BY MICROWAVE CARBON HEAT REDUCTION-MAGNETIC SEPARATION FROM RED MUD Received – Primljeno: 2017-09-08 Accepted – Prihvaćeno: 2017-11-10 Original Scientific stone – Izvorni znanstveni rad Y. L. Cong, Z. J. He, J. H. Zhang, Q. H. Pang. School of Materi-als and Metallurgy, University of Science and Technology Liaon-ing, China …
REDUCTION OF IRON ORE BY CHARCOAL UNDER MICROWAVE …
Lastly, As the function of carbon was limited to the reducing agent, almost half amount of CO 2gas emissions can be reduced in comparison to the existing blast furnace, assuming the microwave is excited from greenable electric power by solar, hydro and nuclear plants.
Microwave heating processes involving carbon …
01.01.2010 · Recently, a process for carrying out the carbothermic reduction of iron oxides using microwave heating has been patented . Similar processes that combine microwave heating with the use of various kinds of carbons as reducing agent and microwave absorbers are applied to other metallic oxides .
Direct-Reduced Iron - an overview | ScienceDirect …
Direct reduction (DR): Direct reduction involves the production of solid iron from iron ores and a reducing agent (e.g., natural gas). The solid product is called DRI and is mainly applied as feedstock in EAF. The direct reduction process has been commercialized since the 1970s and a variety of processes have been developed.
Microwave absorbing properties of flake-shaped …
01.12.2017 · Microwave absorbers are used in a wide range of fields such as radar-cross section (RCS) reduction for stealth aircrafts, electromagnetic interference (EMI) reduction for electronic products and health protection for human. In this study, the flake-shaped carbonyl iron (FCI) powder was obtained from raw spherical carbonyl iron (SCI) powder by ball milling for 60 h. The SCI powder was …
Indirect Reduction - an overview | ScienceDirect …
Metallic iron is mainly formed through gas–solid reduction, approximately 2/3 through indirect reduction and 1/3 through direct reduction. Carburization of iron can start at relatively low temperatures in contact with CO gas. Dissolution of carbon in solid iron or sponge lowers the melting point of iron significantly. In the shaft, the carbon content in the iron does not exceed 1
Microwave-assisted ammonia decomposition …
01.02.2017 · In the direct reduction, iron (Fe) could be formed as a result of reaction between solid carbon and iron oxides (FeO) at temperatures higher than 950 °C. So, in the present study direct reduction is not supposed to be occurred. In the case of indirect reduction, either CO or H 2 was used and it took place at temperatures lower than 900 °C.
Direct Reduction Process - an overview | …
In a DR process, iron ore pellets and/or lump iron ores are reduced by a reducing gas to produce DRI or hot briquetted iron (HBI). Depending on the generation of the reducing gas, two different DR processes are commercially available: gas-based and coal/oil-based. In the gas-based DR process, the reducing gas is produced by chemically reforming a mixture of natural gas and off-gas from the …
microwave iron direct reduced carbon - …
microwave iron direct reduced carbon. Direct Reduced Iron DRI Cargo Handbook the world s . Direct reduced iron DRI also called sponge iron is produced from direct reduction of iron ore in the form of lumps pellets or fines by a reducing gas produced from natural gas or coal The reducing gas is a mixture majority of hydrogen H2 and carbon monoxide CO which acts as reducing agent . If you …
Microwaves for Reduction of Iron Ore Pellet by …
Request PDF | Microwaves for Reduction of Iron Ore Pellet by Carbon | Results of reducibility tests of reduction conducted on iron ore pellets by carbon are presented in this work. Work done is ...
Direct Reduced Iron - Open Source Ecology
Direct-reduced iron is a metallic material formed by the reduction (removal of oxygen) of iron oxide (iron ore) at temperatures below the melting point of iron. DRI is produced by the use of a reducing gas (mostly a mixture of hydrogen and carbon monoxide). The temperatures for this process are significantly lower than those in a blast furnace, and capital requirements are also lower. DRI may ...
Blast furnace process - tec-science
Although the carbon reduces the iron oxides and produces iron, the iron formed is partially enriched with carbon itself. This is done either by the carbon monoxide gas or, at higher temperatures, directly by the carbon. This produces iron carbide Fe3C, also known as cementite.