AbstractIron ore sinter, constituting a major proportion of blast furnace burden, significantly impacts the blast furnace performance The chemical composition of iron ore fines, particularly alumina, sinter basicity and sinter MgO together with the thermal conditions that sinter blends are subjected to play an important role in the formation of mineral phases in sinter
Theory and practice of the sintering process , A study has been made of the sequence of formation of phases in iron ore sinters produced from natural hematite ore under simulated conditions .
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 ,
iron ore ﬁnes into a suitable lumpy product for blast furnace consumption During the process, a melt is generated which solidiﬁes to become the bonding phase in the sinter Typically, sinter produced in the Asia Paciﬁc region and Australia is composed of 80vol% of bonding material— containing phases and minerals precipitated from melt—
Jul 15, 2014· Iron Ore Sinter Iron ore sinter or simply called sinter is usually the major component of a blast furnace iron bearing burden material Sinter normally consists of various mineral phases produced by sintering of iron ore fines with fluxes, metallurgical wastes and a solid fuel
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 furnaceThe final product, a sinter, is a small, irregular nodule of iron mixed with small amounts of other minerals The process, called sintering, causes the constituent materials to fuse to make a single porous mass with little change in the chemical .
A mathematical model of the iron ore sintering process has been developed Sintering on a strand or in a sinter pot is described through expressions for heat and mass transfer, drying and .
In 1902, W Job invented the sintering of pyrite cinder and dusty iron ores with addition of coal and air blowing through the bed from bottom upwards (German patent number 137438) In 1905, EJ Savelsberg developed the process of iron ore sintering with the sintering mixture containing coal and coke breeze (German patent number 210742)
Iron ore sintering involves the movement of a flame front down a particulate bed, and a series of phys-ico-chemical reactions over a large temperature range In the literature simple and more sophisticated iron ore sintering models have been reported In this paper a ,
Phase development in Iron Sinter Test Pots Cooled with Liquid Nitrogen or Water Authors: , (Kumba Iron Ore) for designing and performing the pot tests Carel Coetzee for assistance with the SEM analyses Renard Chaigneau for helpful comments Phase development in Iron Sinter Test Pots Cooled with Liquid Nitrogen or Water Authors: T van den Berg .
Keywords: Iron ore sintering, SFCA phases, Phase formation, In situ synchrotron XRD During the iron ore sintering process, iron ore fines (< 6 mm) are mixed with limestone flux and coke breeze and heated to ~1300ºC This results in partial melting of the mixture, and
ally appreciated that the quality of iron ore sinter is dictated by the sinter structure formed during the sintering process, as well as the nature, abundance and mutual interactions of the mineral phases present in the sinter1,2) The chemical composition of iron ore ﬁnes, together with the thermal
The coke combustion process in iron ore sintering is dependent on the coke size Therefore pilot-scale sintering tests with blends containing different coke size distributions were carried out to .
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
Pownceby, M I, Webster, N A S, Manuel, J and Ware, N, 2015 Iron ore geometallurgy – examining the influence of ore composition on sinter phase mineralogy and sinter strength, in Proceedings Iron Ore 2015, pp 579–586 (The Australasian Institute of Mining and Metallurgy: Melbourne)
The properties of iron ore sinter are controlled by the composition and distribution of these mineral phas In particular, the SFCA is the major bonding phase in iron ore sinter, and plays an important role in influencing key sinter quality parameters such as ,
phases present in iron sinter can be achieved only by means of X‐ray diffraction [XRD] analysis combined with Rietveld data analysis Table 3: Mineralogical phases present in Iron Sinter Mineralogically iron sinter comprises, essentially, relict [original surviving] particles of iron ore.
mineralogy and properties of iron ore sinters In AIMM Bull Proc (Vol 289, No 5, pp 163-169) samples and is given in figure 6 It can be seen that the variation of the fine iron ore fraction of the sinters influences the amount of the different sinter phases in the sintering process Figure 7 X-ray diffraction patterns of SFCA phase in .
of mineral phases including calcium-ferrites in sinter ore were successfully conducted These values are influenced by the history of the sintering reaction 1Introduction Deterioration in the quality of sinter ore due to the influence of degradation in the quality of the iron ore resource is an issue in the iron-making process Since the .
Jul 03, 2017· 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 phas This explains .
Sep 30, 2012· Compared with sintered ore, pellets have a higher iron- and a lower gang-content, and pelletizing is suitable for treating the very fine ore that will predominate in the future
Sintering of Iron Ore Our quality limestone and burnt products with optimized size distribution impacts the environmental footprint of the mill by improving the sinter productivity and reducing overall energy cost and emissions IMPACT YOUR PROFITABILITY Read case studies Read white papers
Chemical reactions at high temperatures take place during the sintering process Particles of iron ore and flux interact with each other to form a sinter cake, which consist of iron ore, silico-ferrites of calcium and aluminium (SFCA, Silico-Ferrite of Calcium and Aluminium) [1, 2], dicalcium silicate and amorphous phase
Iron ore sintering is a high-temperature process, and the heat supplied by the combustion of coke breeze could make partial minerals melting, which could bind the separately distributed iron ore particle tightly to guarantee the mechanical strength of sinter product
Oct 02, 2012· The Natural Resources Research Institute s Coleraine Minerals Research Lab is a full service minerals research laboratory withplete capabilities for sintering and pelletizing iron ore on both .
E Donskoi, , JR Manuel, in Iron Ore, 2015 422 Sinter Low-temperature (< 1300 °C) iron ore sinter is an agglomerate of unmelted and partially melted nuclei particles (+ 1 mm) and a matrix bonding phase produced from the melting of fine ore (− 1 mm) and flux particles, with the majority of melt formation occurring in the granule adhering fines layer
In iron ore sinters, the presence of different phases reflects differences in sinter constituent mixtures and different temperatures and reductant additions during sintering This can be of use in the development of stronger, more reducible sinters of the desired basicity
ores and their chemistries affect the formation and composition of sinter phases during sintering Goethite is important as it carries deleterious impurities for steel mak ing The effect of texture is equally important as it affects the reactivity and/or assimilation of iron ore minerals and subsequently the formation of pores during sintering
phases in the sinter ore were compared to consider their chemical composition and mechanical strength 2 Experimental 21 Sample Preparation The starting materials of iron ore sinter, known as quasi-particles, are agglomerated materials composed of iron ores (sinter feed or pellet feed), limestone, silica stone, olivine, and coke breez
Nov 23, 2015· Refinement of iron ore sinter phases: a silico-ferrite of calcium and aluminium (SFCA) and an Al-free SFC, and the effect on phase quantification by X-ray diffraction David C Liles 1 Johan P R de Villiers 2