- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Abstract. Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. Owing to the depleting reserves of traditional high grade iron ore, there have been considerable changes in iron ore resources available throughout the world, especially in steel mills in East Asia.
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Because of the strength, both cold and when heated, and reduction characteristics of iron ore sinter compared to lumps of ore and pelletized ore, it is by far the most widely used feedstock for the... Skip to Main Content. Browse; Search. ... (hardness declines progressively from a to d); subgroup x contains significant < 1 µm …
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To achieve high-efficiency utilization of complex and unmanageable iron-containing minerals, the effects of oxygen enrichment on productivity, yield, flame front speed, exhaust gas peak temperature, and desulphurization reaction of the vanadium–titanium magnetite sintering process as well as sinter tumble index and …
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The iron and steel industry has made an important contribution to China's economic development, and sinter accounts for 70–80% of the blast furnace feed charge. However, the average grade of domestic iron ore is low, and imported iron ore is easily affected by transportation and price. The intelligent ore blending model with an …
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desirable bonding phase in iron ore sinter due to its high reducibility and mechanical strength. Alumina has been known to promote the formation of SFCA in the sintering process of iron ore, but it also increases the porosity of sintered ore and viscosity of primary melt, and decreased the physical properties of the sintered ore.
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Fig 1 Flowsheet of sintering process. The iron ore fines are natural ore of size 0 mm to 10 mm. The raw mix (also called sinter mix) is made with the weighed amount of iron ore fines, limestone, dolomite, sand or quartzite fines (flux), solid fuel (coke breeze or anthracite) and metallurgical wastes (collected dusts, sludge and mill scale etc).
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The difference between hardness and hardenability will be explained and a review presented of how the alloying method selected for ferrous P/M materials influences hardenability. Examples of sinter-hardenable materials will be provided and the ... iron at the sintering temperature, and the resulting microstructures are chemically …
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Hot air sintering technology is used to improve the quality and production efficiency of sintered ore. However, the current thick layer condition highlights the disadvantage of the low oxygen potential of the hot air sintering layer. Therefore, it is considered to use oxygen enrichment sintering to improve the environment of hot air …
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In this study, experiments were carried out to evaluate effects of particle size of coke on iron ore sintering and to obtain the proper proportion of 1–3 mm coke breeze . Sample and Experiment Table 1 summarizes the chemical analyses of the component ores used in the tests.
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The size of iron ore affects the sintering properties. 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.
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The properties of an ideal iron ore sinter depend on the minerals phases. Silico-ferrites of calcium and aluminum (SFCA) must be a major phase to ensure reducibility and strength. ... concentrations, the total FeO content can be calculated. The amount of SFCA phase defines the hardness and subsequently the return of fines rate of the sinter. 3. ...
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The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. …
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A multi-objective optimization problem to maximize both sinter productivity and quality for the integrated iron ore sintering process is formulated and solved using an evolutionary algorithm called non-dominated sorting genetic algorithm II (NSGA-II) to obtain a set of Pareto-optimal solutions. In the iron ore sintering process, it is desirable to …
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Iron ore sinter is the major component of blast furnace feed in Asian iron and steel companies, and as a result, sinter quality directly influences the performance of the blast furnace. The productivity and quality of sinter are strongly determined by the iron ores used in sintering. However, with the rapid development of the steel industry in ...
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The BF is charged with metallurgical coke and iron burden materials including iron ore pellets, sinter, and lump ore. While descending in the BF the charge materials reduce. The iron-bearing materials should reduce fast and remain in the solid form until as high a temperature as possible to ensure reaction contact with reducing …
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Productivity during iron ore sintering is a strong function of the gas flow velocity because the descent of the flame front, for a particular ore mix, is primarily dependent on the rate of convective heat transfer.1 Gas velocity is controlled by the suction applied across the bed and the bed properties. According to the Ergun equation, key …
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flux sinter, Iron ore fines, self fluxing sinter, sinter, sinter machines, Stright line machine. circular machine, super fluxed sinter, The Sintering Process of Iron Ore Fines. Sintering plants are normally associated with the production of hot metal in blast furnaces in integrated steel pants.
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In iron making process, sintering of iron ore fines is an integral step to utilize not only the ore fines but also to introduce a part of flux (limestone and dolomite) along with the sinter in blast furnace burden. In this way, the productivity of the furnace...
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The properties of melts formed in the flame front during iron ore sintering determine the structure of the ensuing sinter bonding phases. The study showed that phosphorus, silica, alumina and magnesia levels, sinter basicity and maximum sintering temperature influenced bonding phase structure.2) Ferrites are one of the important phases in sinter.
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The current issues relating to sintering technology in the steel industry are how to increase productivity to process as much iron ore and to maintain the quality of the sintered ore. Also, reduction of the flue gas emissions in a cost-effective way is strongly stressed these days.
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Recovery of metallurgical dust by sintering inevitably incorporates Zn into the sintered ore, which can have a significant impact on the ore formation process and the quality of the resulting ore. Through miniature-sintering experiments and theoretical first-principles calculations, this paper analyzes in detail the influencing mechanism of Zn on …
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