Direct Reduction Of Laterite Iron Ore Process

The direct reduction processes in combination with the melting of directly reduced iron to produce steel in the EAF offer an alternative to the BF-BOF route. The basis of the direct reduction process is that solid sponge iron is produced by removing oxygen from the ore in a …

Definition of direct reduced iron (DRI): Alternative iron source produced by heating an iron ore... (a process called reduction)...

A coal-based direct reduction process was used to reduce the nickel laterite ore under a constant C: O ratio (1.2: 1) and reduction time (90 min). The effect of basicity and reduction temperature on microstructure and reduction characteristics and of carbon-bearing nickel laterite ore …

20-05-2020· Laterite ore is an important raw nickel ore resource, and methods for extracting valuable metals from low-nickel saprolitic laterite has not been fully developed. This paper proposes a technology, called nonmolten state metalized reduction (NSMR), for …

01-08-2013· The gaseous reduction of laterite ore is a complex multi-phase gas–solid reaction, which consists of three steps: external diffusion, internal diffusion and …

For laterite ore processing, a reverberatory, flash, or electric furnace is used to (i) remove free and chemically bound moisture; (ii) reduce the nickel oxide; and (iii) reduce iron content sufficiently to produce ferronickel product.

All effective methods of direct reduction actually use the same process: rich iron ore (fine concentrate or pellets) is reduced by a special gas mixture up to the iron content of 85-90%. This explains why the production of direct-reduced iron is mainly concentrated in countries with large reserves of oil (oilwell gas), natural gas and iron ore

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.

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, …

09-11-2002· Iron ore being unloaded at docks in Toledo, Ohio. Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite (Fe 3 O 4, 72.4% Fe), hematite (Fe 2 O 3, 69.9% Fe), goethite (FeO(OH), 62.9% Fe ...

A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated.

May 05, 2019· Sometimes known as direct-reduced iron, sponge iron is a product that is produced using iron oreThe iron ore is often in the form of pellets or lumps, and is subjected to a reduction process that is created by the use of a reducing gas that emits from coal or a natural gas source This type of iron can be produced in several different types of furnaces, including coke or charcoal ...

Process. 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)).

Optimization of the Iron Ore Direct Reduction Process. Jun 27, 2018· 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.

Apr 09 2017 · 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 gasbased 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

Comparison of direct reduction-magnetic separation process on ferruginous and magnesian laterite ore Article in Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 27(3):594-604 ...

The effect of iron content on the reduction of nickel laterite by direct reduction method . I Setiawan. 1, E Febrina. 1, A B Prasetyo. 1, R Subagja. 1, and F Firdiyono. 1. Research Center For Metallurgy and Materials, Indonesian Institute of Sciences, Serpong, Tangsel, Indonesia . …

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.

Effect of Reduction Process Parameter in Direct Reduction Process of Laterite to Produce Substitute Pig Iron for Thin Wall Ductile Iron Material Article (PDF Available) · February 2014 with 71 Reads

Direct reduction furnace types. Direct reduction processes for iron. Illustrations of the principal processes are shown below. The Midrex® and Energiron gas-based processes use predominantly iron ore pellets as feedstock, but sometimes with inclusion of lump ore in the furnace charge. The SLRN coal-based process uses lump ore and, increasingly ...

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.

The effect of iron content on the reduction of nickel laterite by direct reduction method . I Setiawan. 1, E Febrina. 1, A B Prasetyo. 1, R Subagja. 1, and F Firdiyono. 1. Research Center For Metallurgy and Materials, Indonesian Institute of Sciences, Serpong, Tangsel, Indonesia . …

Effect of Reduction Process Parameter in Direct Reduction Process of Laterite to Produce Substitute Pig Iron for Thin Wall Ductile Iron Material Article (PDF Available) · February 2014 with 71 Reads

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.

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.

In this study, low grade nickel laterite ore was processed by means of isothermal-temperature gradient method to produce ferronickel nugget. The ore and coal as reductant were ground to obtain the ...

HYL process for direct reduction of iron ore was the fruition of research efforts begun by Hojalata y L.mina, S.A. (later known as Hylsa), at the beginning of the 1950s. After the initial evaluation of the concept, it was decided to install a process using a tunnel furnace and several runs were undertaken.

Therefore, a novel method to process laterite nickel ore using lower energy is needed. The novel method is done via direct reduction and magnetic separation. In laterite nickel processing by direct reduction, the challenges are to conduct selective reduction of nickel and to let iron unreduced.

On the base of thermodynamic analysis of pure nickel and iron oxides' hydrogen reduction, direct hydrogen reduction process of a low-grade complex laterite-nickel ores has been studied, the ...

Direct Nickel Ltd. successfully tested its DNi laterite leaching process in a 1-t/d pilot plant, a section of which is pictured above. The plant used feed from PT Antam’s Buli nickel mine in Indonesia, where Direct Nickel is considering building a 10,000-20,000 t/y commercial-scale plant.