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Effect of blast furnace burden water content on the blast ...

Effect of blast furnace burden water content on the blast ...

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• Magnetite pellet layer (prereduced hematite) The WGSR was observed at 350400 °C Magnetite clearly alyzes the reaction Gas feed: 50 % N 2 17 % CO 25 % CO 2 8 % H 2 O Flow rate: 15 l/min Furnace heating: 3 °C/min to 500 °C, where kept for 2 h Lab. Of Process Metallurgy, Antti Kemppainen, . Gas balance in the layer furnace • 2 h time of magnetite pellet layer exp. at ...

Major Mines Projects | Malmberget Mine

Major Mines Projects | Malmberget Mine

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 · The ore is composed of magnetite (95%) and hematite (5%), and the grade for the different ore bodies varies from 49% to 63% (Lund, 2013). The width of the ore bodies varies from 20 to 100m, and the tonnage varies from 5MT to 250MT (Savilahti and Jonsson, 2013). The mine is divided into two parts: the western and eastern fields. The ore bodies in the eastern fields are composed of massive ...

Blast Furnace and Process Description

Blast Furnace and Process Description

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 · Blast Furnace and Process Description: Iron blast furnace is a vertical shaft, which is used to melt the iron ore and to produce hot metal by heat exchange and chemical reaction. The burden charge consisting of iron oxide, flux and coke and it provides through the throat from the top of the furnace. Blast Furnace. The iron oxide is reduced to hot metal by receiving heat from the ascending .

Major Mines Projects | Malmberget Mine

Major Mines Projects | Malmberget Mine

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 · The ore is composed of magnetite (95%) and hematite (5%), and the grade for the different ore bodies varies from 49% to 63% (Lund, 2013). The width of the ore bodies varies from 20 to 100m, and the tonnage varies from 5MT to 250MT (Savilahti and Jonsson, 2013). The mine is divided into two parts: the western and eastern fields. The ore bodies in the eastern fields are composed of massive ...

Xray microtomography for characterisation of cracks in ...

Xray microtomography for characterisation of cracks in ...

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rotary disc to pellets with sizes of 10–12 mm. Pellets were loaded and indurated in a shaft furnace with a batch sizeof 40 kg. The maximum temperature during induration was 1300uC. Reduction For the reduction experiments studied with tomography, the pellets were placed in a furnace for determination of

Can industry decarbonize steelmaking?

Can industry decarbonize steelmaking?

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 · One constraint shared by most hydrogenbased methods is that they need to be fed with hematite because magnetite is far less porous and so has a much slower reduction rate inside a shaft furnace ...

Reduction swelling behaviour of iron ore pellets

Reduction swelling behaviour of iron ore pellets

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• Blast furnace shaft operation is greatly affected by the mechanical properties of burden materials –Upwards rising gases follow the easiest path they can have –Areas of low permeability in BF shaft leads to uneven gas distribution in shaft and uneven reduction behaviour of burden material • Low energy efficiency (low utilization rate of top gas) • Swelling and disintegration of ...

Carbothermal Reduction of Iron Ore in Its Concentrate ...

Carbothermal Reduction of Iron Ore in Its Concentrate ...

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 · Carboncontaining pellets were prepared with the carbonized product of agricultural wastes and iron concentrate, and an experimental study on the direct reduction was carried out. The experimental results demonstrated that carboncontaining pellets could be rapidly reduced at 1200 to 1300°C in 15 minutes, and the proper holding time at high temperature was 15 to 20#x2009;min.

Hydrogen Ironmaking: How It Works

Hydrogen Ironmaking: How It Works

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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. Unsurprisingly, the current hydrogenbased ironmaking projects have retained the ...

1 BACKGROUND

1 BACKGROUND

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magnetite involves restructuring of a hexagonal to cubic lattice, which results in some disloion of the structure. Shaft permeability and reduction greatly affects the operating parameters and stability of the blast furnace and directly influence the productivity of the blast furnace. Permeability depends on the particle size, distribution of the charge and on the mechanical strength during ...

Effect of Varied Oxygen Levels on the Oxidation of a ...

Effect of Varied Oxygen Levels on the Oxidation of a ...

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In this study, interrupted pot furnace experiments were conducted on a magnetite pellet bed (approximately 100 kg) at LuossavaaraKiirunavaara Aktiebolag to investigate the effect of oxygen levels at approximately 6%, 13%, and 30% O 2. Temperature profiles are measured and pellet properties (compression strength, porosity, oxidation degree, microstructures) are analysed at different bed ...

Blast Furnace and Process Description

Blast Furnace and Process Description

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 · Blast Furnace and Process Description: Iron blast furnace is a vertical shaft, which is used to melt the iron ore and to produce hot metal by heat exchange and chemical reaction. The burden charge consisting of iron oxide, flux and coke and it provides through the throat from the top of the furnace. Blast Furnace. The iron oxide is reduced to hot metal by receiving heat from the ascending .

Green Pellet

Green Pellet

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 · Three furnace types have been used for pellet induration: shaft furnace, travelling grate, and gratekiln. The shaft furnace is the original technology used for this appliion, but is little used nowadays [119]. Traveling grate and gratekiln processes rely on the pellets being carried through a number of thermal zones by a moving perforated grate; in the case of the straightgrate, the ...

Hydrogen Ironmaking: How It Works

Hydrogen Ironmaking: How It Works

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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. Unsurprisingly, the current hydrogenbased ironmaking projects have retained the ...

Iron Ore Pellets and Pelletizing Processes | Iron Ore ...

Iron Ore Pellets and Pelletizing Processes | Iron Ore ...

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However, vertical shaft furnaces are not as common as the traveling grate or grate kiln systems. ... To enhance the induration of hematite pellets, both magnetiteaddition and carbon burdened methods are found to be the favourable techniques in practice. In case of pelletization of the magnetite ores, when a pellet starts to oxidize, a shell of hematite is formed while the pellet core is still ...

Blast Furnace and Process Description

Blast Furnace and Process Description

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 · Blast Furnace and Process Description: Iron blast furnace is a vertical shaft, which is used to melt the iron ore and to produce hot metal by heat exchange and chemical reaction. The burden charge consisting of iron oxide, flux and coke and it provides through the throat from the top of the furnace. Blast Furnace. The iron oxide is reduced to hot metal by receiving heat from the ascending .

BLAST FURNACE INTRODUCTION TO BLAST FURNACE

BLAST FURNACE INTRODUCTION TO BLAST FURNACE

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the blast furnace shaft: ... vertical section bosh: the ore reduction completes, and the ores are melting down hearth: where the molten materials are collected and tapped via the tapholes. 28/04/2015 2 zones of blast furnace main components schematic view of tuyeres and bustle pipe tuyeres and bustle pipe: the bustle pipe is a large diameter doughnut shape pipe encircling the furnace. it ...

Energy analysis of pelletising in a straight grate ...

Energy analysis of pelletising in a straight grate ...

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Iron ore pellet Slurry Iron ore pellet Water Biproducts Figure 1. Schematic picture of the different process units within the LKAB facility in Malmberget There are about 20 ore bodies loed in the vicinity of the town of Malmberget of which ten are currently being mined. Most of the deposit consists of magnetite ore (Fe 3O 4), but non