+86 0371 8654 9132

iron ore composite pellets in shaft furnace

MODELING THE IRON ORE PELLETS REDUCTION ON

The process for pelletizing iron ore fines is an important operation unit for producing high quality of raw materials for the subsequent reduction processes such as blast furnace or direct reduction.

Iron ore pellet disintegration mechanism in simulated ...

2017-7-15 · Iron ore pellets were reduced at 450–600 °C under load of 0.4 kg/cm 2 by simulating upper shaft furnace conditions , . For each reduction experiment, iron ore pellets were heated to the required temperature and then reduced for 60 min in reducing gases (listed in Table 2) at flow rate of 0.6 m 3 /h. Subsequently, the reduced samples were ...

Iron ore pellet disintegration mechanism in simulated ...

A series of reduction experiments of iron ore pellets with hydrogen, carbon monoxide and their mixture were carried out in a laboratory scale shaft furnace. The sticking behavior accompanying ...

Reduction Behaviour of Iron Ore–Coal Composite Pellets in ...

2016-5-7 · Reduction of iron ore–coal composite pellets in multi-layers at rotary hearth furnace (RHF) is limited by heat and mass transfer. Effect of various parameters like pellet shape, size, and bed packing material that are supposed to influence the heat and mass transfer in the pellet bed, have been investigated, on the reduction behaviour of iron ore–coal composite pellets at 1250 °C for 20 ...

Reduction Behavior of Carbon Composite Iron Ore Hot ...

The reduction and melting behavior of carbon composite iron ore hot briquette in shaft furnace are dis-cussed. As these agglomerates are made by the use of thermal plasticity of coal, the reduction rate by chain reactions in interface between ore and coal could be increased. The carbon composite iron ore

Iron ore pellet disintegration mechanism in simulated ...

The disintegration behavior and mechanism of iron ore pellet in simulated shaft furnace conditions were investigated in details. Effects of temperature, reducing gas and gangue compositions were emphatically discussed. It was found that pellet disintegrated acutely as reduced by H 2 /CO = 0.8 at 550 °C. Gangue minerals in pellet were proved to ...

Smelting Reduction of Iron Ore‐Coal Composite Pellets ...

2010-6-15 · Smelting reduction of iron ore‐coal composite pellets has been carried out in an induction furnace. The pellets, tied with tungsten wire, were immersed into the liquid metal bath. The experiments were carried out in the temperature range of 1713 K to 1733 K.

[PDF] Iron ore pellet disintegration mechanism in ...

Abstract The disintegration behavior and mechanism of iron ore pellet in simulated shaft furnace conditions were investigated in details. Effects of temperature, reducing gas and gangue compositions were emphatically discussed. It was found that pellet disintegrated acutely as reduced by H2/CO = 0.8 at 550 °C. Gangue minerals in pellet were proved to ease the disintegration in various degrees.

Kinetic Studies of Iron Ore–Coal Composite Pellet ...

2011-12-1 · Iron ore–coal composite pellets were produced by pelletizing the mixture of iron ore and coal fines with slaked lime and dextrose as binder in a disc pelletizer (400 mm diameter). The green pellets (12–20 mm size) were dried in open atmosphere for 24 h followed by oven drying at a

Detailed Modeling of the Direct Reduction of Iron Ore in

2019-9-4 · Numerous iron ore shaft furnace models were thus proposed in the literature. The first 51 studies addressed the reduction of a single pellet by H2, CO, or H2-CO mixtures [5-10]. The 52 subsequent ones developed models that simulate the reduction zone of the shaft furnace in 1D [11-53 12]. With the aim to correctly describe the lateral gas feed ...

Reduction Behaviour of Iron Ore–Coal Composite Pellets in ...

2016-5-7 · Reduction of iron ore–coal composite pellets in multi-layers at rotary hearth furnace (RHF) is limited by heat and mass transfer. Effect of various parameters like pellet shape, size, and bed packing material that are supposed to influence the heat and mass transfer in the pellet bed, have been investigated, on the reduction behaviour of iron ore–coal composite pellets at 1250 °C for 20 ...

Smelting Reduction of Iron Ore‐Coal Composite Pellets ...

2010-6-15 · Smelting reduction of iron ore‐coal composite pellets has been carried out in an induction furnace. The pellets, tied with tungsten wire, were immersed into the liquid metal bath. The experiments were carried out in the temperature range of 1713 K to 1733 K.

Solid Fuel in Pelletizing Shaft Furnace - 911 Metallurgist

2019-9-9 · The use of solid fuel in shaft furnaces to indurate iron ore pellets was originally considered a necessary evil, which the industry worked long and hard to eliminate. Since then changes have taken place in furnace design and operating practices that have led us to our suggestion that solid fuel additions could again be used.

Shaft Furnace - an overview | ScienceDirect Topics

The iron blast furnace (Fig. 47) is the most highly developed shaft furnace and can operate very efficiently not only as a heating unit but as a high temperature reaction chamber.Modern furnaces are nearly 30 m high (plus a considerable superstructure) and may be over 15 m in diameter at the hearth.

A Computational Study on the Reduction Behavior of

2020-3-5 · of Iron Ore/Carbon Composite Pellets in Both Single and Multi-layer Bed Rotary Hearth Furnace SOUMYADEEP DASGUPTA, SOORAJ SALEEM, PRAKASH SRIRANGAM, MICHAEL AUINGER, and GOUR G. ROY A phenomenological model for the reduction of iron ore/carbon composite pellets in a multi-layer bed rotary hearth furnace has been developed.

Smelting Reduction of Iron Ore‐Coal Composite Pellets ...

2010-6-15 · E-mail address: [email protected] Metallurgical and Materials Engg. Department, Faculty of Tech. & Engg., M. S. University of Baroda, Kalabhavan, Vadodara ...

Sticking behaviour and mechanism of iron ore pellets in ...

2019-7-18 · (2019). Sticking behaviour and mechanism of iron ore pellets in COREX pre-reduction shaft furnace. Ironmaking & Steelmaking: Vol. 46, No. 2, pp. 159-164.

Detailed Modeling of the Direct Reduction of Iron Ore in

2018-10-9 · carbon dioxide emissions. As such, numerous iron ore shaft furnace models have been proposed in the literature. Initial studies addressed the reduction of a single pellet by H2, CO, or H2-CO mixtures [4–9]. Subsequent studies developed models that simulated the reduction zone of the shaft furnace in one dimension [10,11].

Kinetics of iron ore pellets reduced by H2N2 under non ...

2018-8-9 · Optical microstructures of S-1 metalized pellets are shown in Fig. 3.Lots of metallic iron in bulk is observed in the exterior shown in Fig. 3a, and the content of iron decreases gradually from the outside in revealed from Fig. 3b. A mass of wüstite, which looks darker than iron, exists mainly in the interior, and the metallic iron is scattered in the wustite shown in Fig. 3c.

Production - voestalpine Stahl Donawitz GmbH

2021-8-21 · In this process iron ore pellets are reduced in a shaft furnace using natural gas. The advantage of this technology is the saving of approx. 40% CO 2 compared to the classical blast furnace route. A further reduction in CO 2 emissions can be achieved by using green hydrogen.

Iron Ore Pelletizing Process: An Overview

2018-7-17 · Iron Ore Pelletizing Process: An Overview Sandra Lúcia de Moraes, ... experimental shaft furnace. Commercial operation started in the 1950s in Sweden using ... Table 2. Quality specification of iron ore pellets. 1Basicity in this context is the ratio between the weight percent of CaO and SiO 2. 44 Iron Ores and Iron Oxide Materials.

Mechanised Industry

2011-5-31 · composite pellets have not proved to be successful shaft furnace feed material. With regard to sponge iron making, mixing of limited amount of carbon- aceous material with iron ore during agglomeration has definite advantages.

The Use of Coated Pellets in Optimising the Blast Furnace ...

2017-2-6 · iron ore pellets is well known since a few years, and it has been widely used in the DR process to reduce the clustering of direct reduced iron, DRI, in DR shaft furnaces.3) In the DR processes the product is freshly reduced iron in a solid state. It is, therefore, crucial for the material flow in the re-

Iron ore–coal composite pellets/briquettes as new feed ...

2017-3-3 · The other option is to convert the iron ore and coal/coke fines into composite pellets/briquettes. By producing iron ore-coal/coke composite pellets/briquettes from iron ore and coal/coke fines, utilization of these fines takes place as well as new feed materials are generated for iron and steel making.

Simulation of reduction of iron-oxide-carbon composite ...

The primary motivation of this work is to evaluate a new alternative ironmaking process which involves the combination of a Rotary Hearth Furnace (RHF) with an iron bath smelter. This work is concerned primarily, with the productivity of the RHF. It is known that the reduction in the RHF is controlled by chemical kinetics of the carbon oxidation and wustite reduction reactions as well as by ...

Production - voestalpine Stahl Donawitz GmbH

2021-8-21 · In this process iron ore pellets are reduced in a shaft furnace using natural gas. The advantage of this technology is the saving of approx. 40% CO 2 compared to the classical blast furnace route. A further reduction in CO 2 emissions can be achieved by using green hydrogen.

Hydrogen Ironmaking: How It Works - MDPI

2020-7-13 · The second process investigated was the direct reduction of iron ore pellets or lumps in a vertical shaft furnace, such as a MIDREX furnace. The latter process, which is detailed in the next section, was eventually selected. The whole route to steel proposed based on these investigations is depicted in Figure1.

New Trends in the Application of Carbon-Bearing

2019-3-3 · Iron Ore Reductant Shaft furnace BF Sinter, pellets Coke and coal Molten iron MIDREX Pellets, lump Natural gas, syn gas Solid DRI * HyL Pellets, lump Fluidized bed Finex Fines Coal FINMET Natural gas Rotary kiln SL/RN Lump, pellets Coal and recycled char RHF FASTMET Composite pellets coal * DRI stands for direct reduced iron.

Experimental study of the temperature profile in an iron ...

2020-1-30 · of iron production is necessary, and doing so before 2045 will contribute significantly to the target of a fossil-free Sweden. [2] The Hydrogen Breakthrough Ironmaking Technology (HYBRIT) initiative will reduce iron ore pellets in similar shaft furnaces used in other parts of the world today, MIDREX or HYL processes. The main

Cost Effectiveness Analysis of HYL and Midrex DRI ...

2016-4-27 · Midrex is a process by which iron ore pellets, lump iron ore or a combination of both is reduced in a vertical shaft/reduction furnace. The reduced material then flows through catalyst tubes where it is chemically converted into a gas containing hydrogen and carbon monoxide. As the iron ore moves down the furnace