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·Therefore the sintering temperature is controlled within 1400 ℃ and the oxygen partial pressure in the sintering process is appropriately increased Recent advances and research status in energy conservation of iron ore sintering in China JOM 69 11 Google Scholar Wang H Angang Wang Q et al 2010 Production practice of 800 mm thick
·The formation mechanism of NOx includes Thermal NOx Fuel NOx and Prompt NOx Thermal NOx is generally formed when the temperature is higher than 1800 K [3] but the highest temperatures of sinter bed are generally 1600 K Prompt NOx is mainly from the CH radicals from the hydrocarbon decomposition reacting with the N 2 in the air the fuel for iron
The research status of the iron ore s high temperature behaviors in the sintering process was reviewed in this paper The influencing factors of the high temperature behaviors and their effects on
·In the iron ore sintering process air flow rate is a major factor in determining the flame front speed which in turn influences the sinter quality and productivity
·The iron ore sintering Hematite is distributed around the pores which proves that the sintering temperature is high enough to oxidize magnetite but the high temperature holding time seems to be short which fails to produce sufficient liquid phase to fill the pores In addition the large amount of magnetite in layer 4 indicates that the
·Accurate computational models of sintering behavior would assist to enhance sinter quality and are anticipated to play a role in yield prediction Sintering is a vital process in the manufacturing of iron and steel As a consequence the primary objective of these models will be a thorough simulation of mass and heat transport during the sintering process In this paper
·The sintering process is a thermal agglomeration process and it is accompanied by chemical reactions In this process a mixture of iron ore fines flux and coal particles is heated to about 1300 °C 1480 °C in a sinter bed The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering The silico ferrite of calcium
·The high temperature characteristics of iron ores play important roles in optimizing ore proportion of sintering which are tested by using iron ore fines and analytical reagent CaO as raw materials Two calculation methods of CaO addition amount based on binary basicity basicity method and n Fe2O3 /n CaO mole ratio method respectively were
·With the wide application of thick bed sintering technology the temperature distribution of sintering bed is more uneven the lower layer will get more heat compared with the upper layer which reduces the energy utilization efficiency Therefore this paper proposes a high energy efficiency low carbon sintering technology to solve this problem
·With iron ore sintering iron fines are utilizable for pig iron production The sintering process is influenced extensively by the properties of the input material and process conditions It is the most exothermic reaction of the sintering process Due to temperatures above 1100°C solids are melting without reaching the point of
·For a long time the research of ore blending based on high temperature properties of iron ore have been commonly conducted [1 2] However the assimilation properties and flow properties of iron ore are mostly evaluated by the minimum assimilation temperature [] and the liquidity index [] which was seldom considered the sintering process information and
·Therefore it is necessary to investigate the action mechanism of alumina on iron ore sintering As is well known high temperature characteristics of iron ores are identified as the basic indexes
High Temperature Mineralization Behavior of Mixtures during Iron Ore Sintering and Optimizing Methods Min Gan 1 it would benefit the generation of liquid phase and columnar & acicular SFCA Research of optimizing ore blending indicates that as the chemical components in melt zone satisfies the conditions of mineralization the yield and
·With the aim of reducing CO 2 emissions in basic industries the sector of iron and steel metallurgy is also faced with the question of how carbon can be replaced in ore reduction By means of in situ observation this study investigates the direct reduction DR of individual iron ore pellets under an atmosphere of hydrogen H 2 and carbon monoxide CO
·Intensification of the iron ore sintering process was approached by injecting hydrogen rich gas into the sinter bed The location of the injection was critical to the pyrolysis of the solid fuel and the SOx and NOx emissions Hence the temperature of reduction is considered a critical parameter in the PI study These findings are also
·In this study a sintering test of high alumina limonite from Indonesia matched with an appropriate magnetite concentration is performed The sintering yield and quality index are effectively improved by optimizing the ore matching and regulating the basicity For the optimal coke dosage of % and basicity of the tumbling index of the ore blend is found
·It can be seen from Tables 1 and 2 that the blend with high iron grade has a high content of FeO wt % because it consisted of 70 wt % magnetite concentrate and 30 wt % fine ore The coke breeze has high fixed carbon content wt % and low volatile matter content wt % Methods The double layer sintering process is shown in Fig 1
·Developing deNOx catalysts with lower activity temperatures range significantly reduces NH3 selective catalytic reduction SCR operating costs for low temperature industrial flue gases Herein a novel FeVO4/CeO2 catalyst with great low temperature NH3 SCR and nitrogen selectivity was synthesized using a dipping method Characterization techniques such
·The iron ore sintering process was simulated and computational domain was the same as the configuration of a sinter pot the temperatures are close at the height of y = 500 mm Due to higher coke content in the upper bed in two layer sintering temperature level of the upper bed was elevated When cold air flowed through the hotter upper
·During the iron ore sintering process two types of particles are present in the sinter bed 1 fines which are actively taking part in melting and the formation of secondary phases and 2 coarse ores which are partially interacting with the surrounding melt The quality of the final sinter is particularly determined by the secondary phases and their bonding ability
·The liquid amount computed by FactSage and A after are shown in Fig liquid amount ranges from to % and A after tends to increase with the liquid amount Ore E shows a different trend with other iron ores in A after and the liquid amount Compared to ore F and ore G the lower A after of ore E is caused by its thicker liquid cake after sintering
·The iron oxide FeO content had a significant impact on both the metallurgical properties of sintered ores and the economic indicators of the sintering process Precisely predicting FeO content possessed substantial potential for enhancing the quality of sintered ore and optimizing the sintering process A multi model integrated prediction framework for FeO
