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direct reduction processing of iron

Direct reduced iron Wikipedia

Direct reduction processes can be divided roughly into two categories: gas-based, and coal-based. In both cases, the objective of the process is to drive off the oxygen contained in various forms of iron ore (sized ore, concentrates, pellets, mill scale, furnace dust, etc.), in order to convert the ore to metallic iron, without melting it (below 1,200 °C (2,190 °F)). The direct reduction process is comparatively energy efficient. Steelmade using DRI requires significant

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Direct reduced iron process tec-science

Direct reduced iron (DRI) process. In addition to the process route via the blast furnace process, there is another option for extracting crude steel from iron ores using the so-called direct reduced iron (DRI) process (secondary route).The starting point for the efforts to find an alternative to the blast furnace process was the relatively high process expenditure.

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Direct-Reduced Iron an overview ScienceDirect Topics

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.

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Direct Reduced Iron and its Production Processes IspatGuru

16/03/2013· In the direct reduction process, the solid metallic iron (Fe) is obtained directly from solid iron ore without subjecting the ore or the metal to fusion. Direct reduction can be defined as reduction in the solid state at O2 potentials which allow reduction of iron oxides, but not of other oxides (MnO, and SiO2 etc.), to the corresponding elements. Since reduction is in the solid state, there

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Direct-Reduced Iron Process (DRI) NIPPON STEEL

NIPPON STEEL ENGINEERING CO., LTD. provides new iron source technology that enables the achievement of productivity improvements, operational cost reductions, CO 2 emissions reductions, and capital investment reductions through the optimal combination of Tenova HYL and Danieli's natural gas-based direct-reduced iron technology (ENERGIRON) with our blast furnace equipment technology

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(PDF) i) Direct Reduced Iron: Production

This product is known as direct reduced iron (DRI) or sponge iron. Processes that produce iron by reduction of iron ore (in solid state) below the melting point are generally classified as DR

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Direct Reduction Process an overview ScienceDirect Topics

The MIDREX process is a shaft-type direct reduction process where iron ore pellets, Figure 17.32 shows a proposed and tested laboratory-scale operation modus of the Circofer® process (a coal-based direct reduction process using a CFB—circulating fluidized bed reactor), in which products DRI/LRI and char are used in the BF, for example, by means of injection via tuyeres (Born et al

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Ironmaking 101 From Ore to Iron with Smelting and

17/10/2017· The low cost of natural gas has made the direct reduced iron (DRI) process more attractive to steelmakers. The MIDREX® process is currently the most widely implemented DRI technology. MIDREX claims their technology is used in about 60% of the direct iron reduction plants. The overall reduction reactions in a DRI shaft furnace are: Fe 2 O 3 (s) + 3H 2 (g) → 4Fe(s) + 3H 2

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Iron processing Britannica

Direct reduction, in which iron ores are reduced at temperatures below the metal’s melting point, had its origin in such experiments as the Wiberg-Soderfors process introduced in Sweden in 1952 and the HyL process introduced in Mexico in 1957. Few of these techniques survived, and those that did were extensively modified. Another alternative iron-making method, smelting reduction, had its

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Direct-Reduced Iron Process (DRI) NIPPON STEEL

NIPPON STEEL ENGINEERING CO., LTD. provides new iron source technology that enables the achievement of productivity improvements, operational cost reductions, CO 2 emissions reductions, and capital investment reductions through the optimal combination of Tenova HYL and Danieli's natural gas-based direct-reduced iron technology (ENERGIRON) with our blast furnace equipment technology

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Direct Reduced Iron (DRI) International Iron Metallics

Direct Reduced Iron (DRI) is the product of the direct reduction of iron ore in the solid state by carbon monoxide and hydrogen derived from natural gas or coal. See more information about the production of DRI. Most gas-based direct reduction plants are part of integrated steel mini-mills, located adjacent to the electric arc furnace (EAF) steel plant. DRI can be either hot or cold charged to

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Iron processing Britannica

Direct reduction, in which iron ores are reduced at temperatures below the metal’s melting point, had its origin in such experiments as the Wiberg-Soderfors process introduced in Sweden in 1952 and the HyL process introduced in Mexico in 1957. Few of these techniques survived, and those that did were extensively modified. Another alternative iron-making method, smelting reduction, had its

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What is Direct Reduced Iron? (with picture)

14/10/2020· Direct reduced iron is created by heating iron ore to burn off carbon and oxygen. During the reduction process in the production of direct reduced iron, either coal or a special gas — commonly containing a combination of carbon monoxide and hydrogen — is used. This mixture functions as a reducing agent and facilitates the decrease in the

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Direct Reduced Iron Midrex Technologies, Inc.

21/10/2020· DRI is a premium ore-based metallic (OBM) raw material made by removing chemically-bound oxygen from iron oxide pellets and lump ores without melting. DRI is high in iron content and low in copper and other undesirable metals, tramp elements, and nitrogen content. It is used to make a broad range of steel productsall types of steel up to and including exposed auto body, extra deep drawing

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Optimization of the Iron Ore Direct Reduction Process

Iron ore direct reduction is an attractive alternative steelmaking process in the context of greenhouse gas mitigation. To simulate the process and explore possible optimization, we developed a systemic, multiscale process model. The reduction of the iron ore pellets is described using a specific grain model, reflecting the transformations from hematite to iron.

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Ironmaking 101 From Ore to Iron with Smelting and

17/10/2017· 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

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Resources Trend and Use of Direct Reduced Iron in

Resources Trend and Use of Direct Reduced Iron in Steelmaking Process Dr. Hidetoshi TANAKA *1 *1 Technology & process Engineering Dept., Iron Unit Div., Engineering Business Expectations are rising for new ironmaking processes that can utilize a wide variety of materials and fuels and also are environmentally friendly. The direct reduction (DR) process is one such ironmaking process that

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OUTOTEC DIRECT REDUCTION AND SMELTING REDUCTION

years to produce direct reduced iron (DRI) from lump ores or iron ore pellets. However, with the decreasing availa-bility of lump ores the ability to process fine-grained ores and concentrates is becoming increasingly important. The SL/RN process cannot be used to treat iron ore concen-trates consisting of finely ground particles with a grain size of less than 0.1 mm as they form accretions

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Production of Direct Reduced Iron in Rotary Hearth Furnace

23/09/2011· The Direct Reduced Iron unit has a capacity of 200,000 tons a year and was built in 1997.[5]<br />The company Iron Dynamics Inc. (U.S.) began operation of an IDP (Iron Dynamics Process) unit in 1999. This furnace has a capacity of 500,000 tons of sponge iron a year and is the largest such furnace in the world.[5]<br />At present India is the largest producer of sponge iron at 17

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