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Flow of materials in rotary kilns used for sponge iron ...

MIDREX process accounts for about 60% of global production. Fig. 2 shows the worldwide locations of MIDREX plants. 2. MIDREX process Fig. 3 is a flow chart for the MIDREX process. Either lump ore, or pellets prepared for direct reduction ironmaking, are charged as raw material from the top of a shaft furnace. The ore is reduced

Project Development

Sep 23, 2011· Production of Direct Reduced Iron in Rotary Hearth Furnace. ... The reduction of iron oxides by volatiles in a rotary hearth furnace process: Part II. The reduction of iron oxide/carbon composites Metallurgical and Materials Transactions B, 2006, Volume 37, Number 2, Pages
[5] Fu-ming Zhang, "Progress of rotary hearth furnace ...


Reduction occurs in a solid state at a lower temperature than in the blast furnace process and produces an intermediate product, sponge iron or direct reduced iron (DRI), with water vapour emitted from the top of the furnace. Water vapour can be condensed and scrubbed before reuse in the plant.

The Ironmaking Process | New Zealand Steel

During 2018, work started on the construction of a pilot plant for fossil-free steel production in Luleå, Sweden. The goal is to have a solution for fossil-free steel by 2035. If successful, HYBRIT means that together we can reduce Sweden's CO2 emissions by 10% and Finland's by 7%.

Rotary Kiln – Electrotherm – Engineering & Technologies ...

Redsmelt NST (New Smelting Technology) is a new ironmaking process based on two reduction steps: pre-reduction in a rotary hearth furnace and DRI smelting in an innovative oxy-coal reactor.

Modelling and optimization of a rotary kiln direct ...

Alibaba offers 28 direct reduced iron kiln products. About 3% of these are Industrial Furnace, 39% are Cement Making Machinery. A wide variety of direct reduced iron kiln options are available to you, such as usage, condition, and local service location.

Coal Gas for DRI plant

Direct Reduced Iron (DRI) Production Plant NIPPON STEEL ENGINEERING CO., LTD. Basic Concept or Summary S-16 u A direct reduced iron (DRI) production plant is a shaft reduction furnace to produce DRI with large metal iron content by directly reducing iron ore (or iron ore pellets) with reducing gases.


Direct Reduced Iron - authorSTREAM Presentation. PowerPoint Presentation: DESCRIPTION OF KILN:- The kiln has been designed based on certain L/D ratio, percentage degree of inclination, rpm etc. Kiln has a length of 70.8 m and a shell diameter of 4.2 meter. the kiln has inclination of 2.5%,rests on four support stations . iron–ore dolomite and about 43-45% coal of the total coal charged into ...

Direct Reduced Iron |authorSTREAM

Circored® Hydrogen-based reduction; Outotec Circored® Hydrogen-based Reduction. Based on over 60 years of experience in fluidized bed technology, Outotec has developed the hydrogen-based Circored® process which produces highly metalized direct reduced iron (DRI) or hot briquetted iron (HBI) for direct feed into electric arc steelmaking furnaces.


The aim of this demonstration project is to develop and test a two-step alternative iron-making process, called "Redsmelt NST" (New Smelting Technology) based on iron oxide pre-reduction in a Rotary Hearth Furnace (RHF) and smelting of the hot DRI in a coal-and-oxygen- blown converter.

Steel making today and tomorrow

Midrex Process for Direct Reduction of Iron Ore Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

Steel making today and tomorrow

4.1 Direct Implementation ... Figure 2: Rotary Cement Kiln (Dry Process with Cyclonic Preheaters) ..... 4 Figure 3: Schematic ... Cement is paramount for economic development and poverty reduction in emerging markets. Along with aggregates and water, cement is the key ingredient in the production of concrete, and, as such, is an essential ...


A rotary hearth furnace is a direct-reduction device that enables to recover valuable metals from dust produced during the steelmaking process, as well as to produce direct-reduced iron from fine ore. Steel mills generate various kinds of dust that are produced during the steelmaking process.

MIDREX Processes

Unlike blast furnaces, direct reduction ironmaking plants using natural gas (e.g., the MIDREX process and HYL process) have the characteristics of requiring a smaller capital expenditure and no coking coal. Many direct reduction plants have been built in developing …

Direct iron

General layout of a direct fired countercurrent rotary kiln used in cement manufacture Rotary kiln body, with drive gear and 2 tyres (riding rings) A rotary kiln is a pyroprocessing device used to raise materials to a high temperature ( calcination ) in a continuous process.

Midrex Process for Direct Reduction of Iron Ore – IspatGuru

Direct reduction processes are of significance and can form an alternative to a conventional Blast furnace. Solid sponge iron ( direct reduced iron or DRI) is produced by removing oxygen from the ore .The technique of Direct reduction varies according to the type of reducing agents employed and the metallurgical vessel in which they are reduced.


High process and production flexibility: no raw material limitations and from 50 to capacity without losses on product quality. The widest range of plant capacities: custom modules from 0.2 to 3 Mtpy without scale-up risk for different plant sizes. Best Carbon (1.5-4%) - Iron (94-96% metallization) unit mix, with high energy efficiency


ENERGIRON is the innovative HYL direct reduction technology jointly developed by Techint and Danieli, and whose name derives from the unique DRI product which distinguishes this technology from other available processes. Plant capacities range from the 200,000 tpa Micro-Module up to 2.5million tpa in a single module.

Direct reduced iron

Process Technology Pilot Plants Plant and Machinery Plant Upgrades. Briquetting ... The processing of fines from direct reduced iron (DRI) Size enlargement of material for rotary hearth furnaces; The following pages will give you more details regarding technology, applications and testing in the area of cold briquetting. ...

Rotary kiln

Midrex Process for Direct Reduction of Iron Ore Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

Thermal kiln

The involvement of Midrex from design through the supply of aftermarket services assures customers that their plants will have long and productive lives. Midrex's proprietary process and equipment design expertise is a major asset to our clients and is unique in the direct reduction industry.


Did you know the natural-gas based MIDREX Direct Reduction Process paired with an EAF has one of the lowest CO₂ emissions of any steelmaking route today? The CO₂ footprint can be further reduced by using green hydrogen as it becomes available on a sufficient scale utilizing Midrex H2 technology.

Direct Reduced Iron (DRI) | International Iron Metallics ...

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. (2)

Iron Reduction Technologies | TENOVA

Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, 500 TPD) Solid state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron (DRI).