The solid phase includes the mixture of iron ore sinter feed, fine sinter (returned fine sinter), coke breeze (or other solid fuel), scales (fines from steel plant), fluxes and limestone. The liquid phase is composed of melted and formed components in the liquid phase [3–6,18–23] .
The energy consumption of the iron ore sintering process generally accounts for about 10% of iron and steel enterprises, 75%~80% of which are consumed in the form of solid fossil fuels like coke breeze or anthracite [1, 2]. Fuel cost accounts for 40% or more of the sinter processing costs .
Modeling Sintering Process of Iron Ore 25 Fig. 2. Thermal cycle of the materials in the sinter strand. Several attempts have been done to predict the final properties of the sinter product (Water et al. 1989, Kasai et al. 1989, 1991). The most important parameters are reducibility,
47 | Page Particulate Sintering of Iron Ore and Empirical Analysis of Sintering Time Based on Coke Breeze 40 35 Sintering Time (mins.) 30 25 20 15 ExD 10 MoD 5 0 850 950 1050 1150 Temperature (0C) Fig. 7: Comparison of the sintering times (relative to ignition temperature) as obtained from experiment and derived model.
The iron blast furnace is the most widely used and efficient producer of liquid iron; however, emissions from sintering and coking cause environmental pressure for the integrated steel works. The combustion of coke fines (breeze) during sintering contributes to greenhouse gases (GHG) (eg carbon dioxide) and is a source of SOx and NOx emissions.
Iron ore ﬁne limestone, dolomite, coke breeze, sinter return ﬁnes and calcined lime collected from the sinter plant stock yard had different moisture contents, and so they were dried in a hot oven at 150uC for 3 h. Table 1 shows the chemical analysis of raw material, and
Oct 27, 2014 5 Material flow Diagram Sintering Plant Flux Hammer Crusher Flux Screen +3mm Stock Bin proportioning section Iron Ore Fines 3mm Coke breeze . Ideal size of ore Fines 10 mm to + 100 mesh Coke breeze 3.2 mm 85% Flux 3.2 mm 85% (2) Fuel content: Variation in Fuel content in Charge Mix
Iron ore sintering consists of heating a layer of fines until partial melting occurs and individual ore particles fuse together. For this purpose, a traveling-grate machine is used, and the burning of fine coke (known as coke breeze ) within the ore generates the necessary heat.
Sintering process is also used in the ironmaking and steelmaking as recycling system as apart from using iron ore fines and additives (such as fluxes and coke breeze), mill scale, collected dusts (and to a much lower extent sludges) from gas cleaning, other recycled by-products of steel manufacture and recycled sinter particles from sinter screening are treated in the sintering machine.
Jan 29, 2015Iron ore microfines and concentrate have very limited uses in sintering processes. They are used in pelletization; however, this process is cost intensive. Furthermore, the microfines of non-coking coal and other carbon-bearing materials, e.g., blast-furnace flue dust (BFD) and coke fines, are not used extensively in the metallurgical industry because of operational difficulties and handling
of charcoal for coke breeze; however the concentrations of SO 2 and NO X in the waste gas decreased. KEY WORDS: charcoal; renewable fuel; iron ore sintering; combustion efficiency; gas emission. 1. Introduction Iron and steel production accounts for about 70% of world greenhouse gas emissions generated from primary metal production.
Jan 15, 2015Particulate sintering of iron ore has been carried out using the necessary ingredients. Empirical. analysis of the sintering time based on the coke breeze input concentration and ignition temperature were also. successfully obtained through first principle application of a derived model which functioned as a evaluative. tool.
The integrated steel works is however under environmental pressure largely due to emissions from sintering and coking. The combustion of coke breeze during sintering contributes to greenhouse gases (eg carbon dioxide) and is the source of much of the emissions of SO x and NO x. Coke breeze, the fines produced during coking of coal, is also suffering supply issues as coke demand increases while
Jul 01, 2019Sintering treats raw iron ore formations before extraction. Depending on the specific machine and iron ore sintering process used, substances such as coke breeze and burnt limestone are used to ignite and heat the iron ore particles until the particles congeal. Once congealed into an agglomerate, the ore is again crushed.
In order to increase the combustion efficiency of coke breeze in sintering process, Effect of granule structure on the combustion behavior of coke breeze for iron ore sintering. ISIJ Int 53(9):1594–1598 CrossRef Google Scholar. 4. Damien O, Sun Q, Shen HB (2008) Effect of coke size on iron ore sintering.
The sintering of iron ore is an important stage in the steelmaking process. In this procedure, the temperature rise due to the combustion of coke breeze causes the partial fusion and diffusion bonding in the sintering charge, producing a coarse agglomerate
In Figure 3, the decrease of coke breeze consumption can be seen, which calculates to approximately 10% reduction, compared to the reference sintering test. Reduced consumption of coke breeze has also been reported in earlier papers . Figure 2 Productivity, reference sinter compared to sinter with addition of LKAB iron ore.
sintered iron ore containing charges to the blast furnace results in lower coke consumption and improved pig-iron quality [4 - 6]. The gas-treatment stage of the technological processes in extraction ferrous metallurgy generates considerable amounts of waste materials (powders and slurries). The total dust quantity emitted by sintering is
Jan 15, 2015Particulate Sintering of Iron Ore and Empirical Analysis of Sintering Time Based on Coke Breeze 47 | Page analysis and comparison of these three sets of sintering times; per unit rise in ignition temperature and per unit coke breeze input concentration shows proximate agreement and a significantly high level of derived
The iron ore sinter which was produced by using coke breeze without sieving yielded low productivity for both sinter machine and blast furnace. Furthermore, using coke breeze without sieving in sintering of an iron ore decreases the vertical velocity of sinter machine and increases the reduction time
Sintering of the iron ore containing materials is required to obtain a product, whose treatment allows regular and intensive stock of the blast furnaces. Iron ores concentrates and waste iron containing powders are subjected to advanced sintering [1-3]. An important and durable trend at advance preparation of the raw
INDUSTRY MARVEL – INNOVATION OF WASTE TO WEALTH Selective utilization of waste to reduce fuel consumption Authors: NITESH Kr. NIRALA (AGM – Operation, Vedanta –Sesa Iron Ore Business), SANJEEV TIWARI (AM – Operation, Vedanta –Sesa Iron Ore Business), DHIRAJ AGARWAL (AM-Operation, Vedanta-Sesa Iron Ore Business) Abstract: The coke breeze is the common solid fuel for iron sintering
It is a type 1 carbonaceous backfill material. Coal coke breeze backfill has low resistivity and low ash content, and may be treated by the addition of 10% (by weight) commercial grade slaked lime. The fuel used in the iron ore sintering processes is coke breeze. Chat Online; IRON ORE - ibm.nic. 7% coke breeze, 5% moisture and 30% iron fines.
In industrial iron ore sintering, the combustion of coke breeze supplies the necessary heat to achieve partial melt-ing of raw materials. It also produces a locally reducing atmosphere within the sinter bed during the heating stage. Once the peak temperature has been reached, the agglom-erated semi-molten material then slowly cools under an
Mar 01, 2006amount of sinter return 100, % amount of (iron ore limestone sinter return coke breeze) ⋅ ++ + The results of these experimental are illustrated in Figures 4–6. From these figures, it is clear that the maximum vertical velocity, maximum produc-tivity of sintering machine and productivity at blast furnace yard are present at 30% sinter return.
The sintering process begins with the preparation of a sinter mixture consisting of iron ore fines, fluxes, solid fuel (called bonding agents in Japan) such as coke breeze, and return fines from the sinter plant and blast furnace as well as recycled ferruginous materials from downstream iron,
Abstract: In this paper a new technology for a compact iron ore sintering machine is analyzed. The compact sintering process is based on the massive injection of gaseous fuels and the solid fuel is only agglomerated fine charcoal obtained by biomass.
At a replacement rate of 25%, the crushed sunflower husk pellets showed the closest thermal profile to that of coke breeze alone in the size range of −0.8 to +0.6 mm. A specification of less than 1 mm has been recommended for the studied biomass materials when co-firing biomass with coke breeze for iron ore sintering.
Granulation of Coke Breeze Fine for Using in the Sintering. Granulation of Coke Breeze Fine for and its appliion in sintering of an iron ore. which convert the ore fines into granules of suitable size. Get Price. Recent advances in iron ore sintering Mineral Processing.
Of the eight CORINAIR (Core Inventory of Air Emissions (environment)) standard gaseous compounds, all except ammonia are known to be emitted by sinter plants. 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
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