phases in sinter iron of ore

Nov 21 2014 · It is composed of several mineral phases out of which main phases are hematite magnetite iron ore SFCA dicalcium silicate and a glassy phase The mineralogical distribution of different phases determines the microstructure of the sinter which imparts the quality of the sinter such as mechanical strength and its behaviour during reduction in the BF

Modeling Sintering Process of Iron Ore 27 Fig 3 Multiple phases considered in the present model In this model it is assumed that the liquid phase formed will move together with the remaining solid phase due to the viscosity thus equations for momentum transfer and

Lowtemperature 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 The majority of nuclei are hematitic but they can also be any other unreacted particles such as flux or aluminosilicate

Silicoferrite of calcium and aluminum SFCA is one of the most commonlyproduced phases in fluxed ironore sintering and has long been regarded as an important bonding phase in industrial sinters It is thus considered to have a significant effect on sinter quality

Mar 09 2013 · Sintering is a thermal process carried out at 1300 deg C to 1400 deg C by which a mixture of iron ore return fines recycled products of the steel plant industry such as mill scale blast furnace dusts etc slag forming elements fluxes and coke fines are agglomerated in a sinter plant with the purpose of manufacturing a sintered product

Apr 02 2010 · The heat generated from combustion of the coke particles continues to raise the temperature of successive layers of the sinter bed to generate a melt phase first from adhering fines and then by assimilation of coarse nucleus particles which on cooling solidifies into a sinter matrix that bonds the initially loose iron ore particles into lumps of clinkerlike material

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

Oct 27 2020 · Iron ore sintering is a type of powder metallurgy used to pretreat iron before using it in manufacturing applications Sintering involves heating iron powder to partially but not completely melt the iron particles The exact process used and additional elements involved vary with some methods using gas or electricity in addition to heat

Sintering is the most important process used to convert 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

Iron ore sintering involves the movement of a flame front down a particulate bed and a series of physicochemical reactions over a large temperature range In the literature simple and more sophisticated iron ore sintering models have been reported In this paper a