Document Type: Article All Authors / Contributors: C E Loo; N Tame; G C Penny ISSN:0915-1559 BL Shelfmark:4582.963000 Language Note: English Unique Identifier: 806261553 Awards:
| Title | : | Effect of iron ores and sintering conditions on flame front properties |
| Author | : | C E Loo; N Tame; G C Penny |
| Language | : | en |
| Rating | : | 4.90 out of 5 stars |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 12, 2021 |
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Iron ores, high temperature characteristics of iron ores get the attention of researchers gradually. Wu’s research indi-cated that 5 kinds of high temperature characteristics of iron ores could reflect the behavior and role of iron ores in the sintering process,1) and differences of assimilation charac-.
Fine iron powder can burn at high temperatures, emitting nothing but rust as a by-product.
Iron ore sintering involves the application of heat which causes the partial melting of a blended mix of ores, fluxes and coke breeze.
May 10, 2016 the presentation describes sinter plant, its major equipments, its operation, sintering process and the technological developments.
Iron-rich (65 to 70 pct total fe) mill scale generated during processing by steel mills can be recycled by using it as a ferrous raw material in the sintering process. The effect of mill scale addition on the phase formation of sintered specimens from an industrial sinter blend containing 0 to 15 wt pct mill scale was examined, and the mineral phases formed during sintering under various.
Anthracite coal as fuel for iron ore sintering is compared with coke breeze. Anthracite is lower in porosity, higher in density, and slower in combustion rate.
The iron ore mean particle size affects the permeability of the sinter bed, which in turn, influences sinter microstructure and productivity. The larger particles favour diffusion bonding, and smaller articles favour slag bonding in the sintering process.
In situ x-ray diffraction may be used to examine the relative effects of alumina sources gibbsite, kaolinite, and aluminous goethite on the formation and stability of key iron ore sinter phases, sfca and sfca-i. Iron ores containing aluminous goethite and kaolinite maximise the formation of these important sinter bonding phases.
Assimilability refers to the reaction ability between iron ores and cao during the sintering process, which reflects the degree of difficulty in generating a melt; it is expressed by the lowest assimilation temperature (lat). Liquid fluid- ity is the melt flowing ability during the sintering process.
The selective granulation process is a new sintering process for high alumina iron ore fines, and can eliminate the adverse effects of ‘hard to sinter’ or ‘unsuitable – for ironmaking’ ores.
Sintering is an agglomeration process that fuses iron ore fines, fluxes, recycled products, slag-forming elements and coke. The purpose of sintering is to obtain a product with suitable.
Ore fines and their potential impacts on the iron ore sintering process and sinter quality are required. In this paper, the sintering process and sinter structure have been analysed and the key factors affecting the sintering performance of iron ore fines, including productivity and quality, identified.
The effects of the feo content of original ores on the feo content in sinter and the creating ability of calcium ferrite are discussed in this paper.
Anthracite coal as fuel for iron ore sintering is compared with coke breeze. Anthracite is lower in porosity, higher in density, and slower in combustion rate. With higher proportion of anthracite in fuel, permeability of sinter bed tends to decrease resulting in lower sinter productivity.
In addition, a preliminary assessment of the effect of 2θ range on the quality of prediction has been made.
World resources are estimated to be greater than 800 billion tons of crude ore containing more than 230 billion tons of iron. The only source of primary iron is iron ore, but before all that iron ore can be turned into steel, it must go through the sintering process. Sinter is the primary feed material for making iron and steel in a blast furnace.
Sinter plants agglomerate iron ore fines (dust) with other fine materials at high temperature, to create a product that can be used in a blast furnace. The final product, a sinter, is a small, irregular nodule of iron mixed with small amounts of other minerals.
An increase in the size of iron ore promotes the productivity of sinter, but can reduce the tumbler strength slightly and save a little coke. The mineralogy of sinter can more easily be predicted from its chemical composition than its physical and chemical properties.
As described in chapter 14 on iron ore sintering, sintering involves the combustion of fossil fuels like coal and coke breeze to generate the heat required for sintering reactions. Therefore, emissions from the sintering process arise primarily from the combustion reactions in the sintering bed on the traveling sinter strand.
The effect of replacing fine ore by coarse ore on sintering reactions was investigated using an infrared furnace on laboratory scale and sinter pots on pilot plant.
Iron-rich (65 to 70 pct total fe) mill scale generated during processing by steel mills can be recycled by using it as a ferrous raw material in the sintering process.
The levels of fe, sio2, al2o3, mgo and other elements, together with the nature of the minerals in the fine ore and associated sintering conditions play a major role in determining the abundance and type of high-temperature bonding phases that form during sintering.
Mixture of iron ores, return fines, recycled stronger green ball generating fewer fines on feeding to the sinter bed, improving effect on the balling mechanism.
Apr 24, 2018 installing desulfurization operations and closing outdated facilities can effectively decrease pollutant emissions from iron ore sintering plants.
In iron ore sintering, granule deformation and compaction can be responsible for significant losses in bed voidage and green bed permeability. In this study, uniaxial compression tests have been used to examine the bed strength of granulated single and binary iron ore sinter mixes.
The most harmful effect of alumina is to worsen the sinter rdi, which increases as the alumina content rises.
The sintering of iron ore is an essential stage in the so-called integrated steelmaking process and its main purpose is to prepare fine ores for use in the blast.
The portion of 竏・0 ﾋ嗄 in iron ore concentrate favoured the granulation and the productivity in conventional sintering, but the portion of +45 ﾋ嗄 had the reverse effects. With increases in finer commercial concentrates (10窶・0 mass%) combined with low grade ore (10窶・0.
Jan 15, 2021 the substitution of anthracite for coke breeze has no influence on the granulation effect of the sintering blend.
The main effect on iron ore mineralization performance in the sintering process is the grain size of raw material and chemical composition.
In iron ore sintering, the properties of the flame front are clearly critical as they determine the heat imparted to the particulate bed and, hence, the strength of the formed sinter.
During iron ore sintering, a packed bed of uniformly dis-tributed granules—composed of a range of iron ore types, fluxes, fuel, return sinter fines and plant dusts—is trans-formed into porous sintered particles of irregular shape.
The chemical composition of iron ore fines, together with the thermal conditions that sinter blends are subjected to, plays an important role in forming the primary melt during the sintering process and consequently determines the sinter structure and quality.
Abstract anthracite coal as fuel for iron ore sintering is compared with coke breeze. Anthracite is lower in porosity, higher in density, and slower in combustion rate. With higher proportion of anthracite in fuel, permeability of sinter bed tends to decrease resulting in lower sinter productivity.
Abstract: the main effect on iron ore mineralization performance in the sintering process is the grain size of raw material and chemical composition.
May 10, 2016 the presentation describes sinter structures, bonding, mineralogy, quality and other details of iron ore sinter.
Iron ore’s assimilation characteristic reflecting the beginning formation temperature of liquid phase in sintering process plays very important role on the fluidity of liquid phase and bonding strength of sinter body.
Al 2 o 3 sinter the most harmful effect of alumina is to worsen the sinter rdi, which increases as the alumina content rises. Industrial experience with the blast furnace shows that within a 10-10.
Iron-rich (65 to 70 pct total fe) mill scale generated during processing by steel mills can be recycled by using it as a ferrous raw material in the sintering process. The effect of mill scale addition on the phase formation of sintered specimens from an industrial sinter blend containing 0 to 15 wt pct mill scale was examined, and the mineral.
During the iron ore sintering process, the loose raw materials, mixtures of fine ore, limestone flux and coke breeze, are converted into a porous but physically strong cake, which is generally composed of four main phases: iron oxides, ferrites, most of which are a complex silico-ferrite of calcium and aluminum (sfca), glasses and dicalcium silicate.
Sinter strength is dependent not only on the self-intensity of the residual rude and bonding phase but also on the bonding degree between them. The infiltration behavior of sintering liquid on nuclei ores influences the bonding degree, which ultimately determines the sinter strength. Infiltration tests were conducted using micro-sinter equipment.
The effects of operational parameters on flue gas recirculation iron ore sintering process: sensitivity analysis based on numerical simulation and industrial onsite experimental validation.
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