The present work proposes a novel process to sinter porous iron ore (porosity ~23–24%) with enhanced productivity and quality. The iron ore is pre-processed in the presence of calcined lime for the temporary closure of pores, which further prevents water absorption during the granulation process in drum in the presence of water. The calcined lime coated iron ore …
WhatsApp: +86 18221755073The 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 ...
WhatsApp: +86 18221755073KEY WORDS: iron ore sinter; iron ore feed size; microstructure; productivity; sinter strength; sinter RDI. 1. Introduction Iron ore sinter is usually the major component of a blast furnace's iron bearing material. Sinter product consists of various mineral phases produced by sintering of iron ore with fluxes and coke breeze. Coke breeze is ...
WhatsApp: +86 18221755073In the sinter mix, com- pared to other raw materials the iron ore proportion is at higher side and its size fraction is more important. Several sinter plants are using smaller than 10 mm size as …
WhatsApp: +86 18221755073To improve the granulation of sinter feed mix, various technologies like two-stage granulation process, coating granulation process, wet vertical ball mill and use of magnetic water have been reported. In this paper, effect of pre-heated water (30, 60 and 90 °C) on granulation fitness of sinter feed mix was studied using a laboratory mixing drum.
WhatsApp: +86 18221755073Two ore blends containing substantial channel iron deposit (CID) and Marra Mamba (MM) ores were assessed. The blends granulated well with addition of hydrated lime, which was found to improve the morphology and strength, and consequently the bed permeability of the resultant green granules. Compared with Blend 2 (a simulated industry blend), Blend 1, …
WhatsApp: +86 18221755073Sinter with optimum iron ore particle size yielded better sinter strength. Higher sinter strength is due to homogeneous distribution of silico-ferrites of calcium and alumina (SFCA) phases.
WhatsApp: +86 18221755073Iron ore sintering is the iron ore powder agglomeration process that changes fine iron ore powder into the lumpy iron-bearing raw material used for blast furnace ironmaking. High-temperature process and addition of alkaline flux will improve metallurgical performance of iron-bearing raw material.
WhatsApp: +86 18221755073Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose...
WhatsApp: +86 18221755073To carry out this study, 25% of pellet feed was added to an iron ore mix in a bench scale drum. The Granulation Index (GI) was determined and samples were collected after granulation step for quasi-particles investigation. ... One important step of the iron ore sintering process is the raw materials preparation, which means that these materials ...
WhatsApp: +86 18221755073To carry out this study, 25% of pellet feed was added to an iron ore mix in a bench scale drum. The Granulation Index (GI) was determined and samples were collected after granulation step for ...
WhatsApp: +86 18221755073Fig 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).
WhatsApp: +86 18221755073Chinese government data indicate that iron ore sinter producers will be able to save 0.42 million tons of standard coal [21] and cut CO 2 emissions per annum by approximately 1.16 million tons if ...
WhatsApp: +86 18221755073T he U.S. Environmental Protection Agency explains that the sintering process converts fine-sized raw materials, including iron ore, coke breeze, limestone, mill scale, and flue dust, into an agglomerated product, …
WhatsApp: +86 18221755073Download Table | Chemical composition of sinter and iron ore from publication: Assessment of blast furnace behaviour through softening–melting test | Blast furnace operation is a complex ...
WhatsApp: +86 18221755073Sinter is the primary feed material for making iron and steel in a blast furnace. According to the U.S. Environmental Protection Agency, the sintering process converts fine-sized raw materials, including iron ore, coke …
WhatsApp: +86 18221755073Agglomeration (sinter production): A sinter feed of iron ore with a 5-60 mm particle size is produced during agglomeration; Pelletizing (pellet production): During pelletizing, 10-20mm pellets are produced.
WhatsApp: +86 18221755073Correspondingly, the challenges in sintering granulation field are proposed to include: (1) Development of iron ore sintering industry; (2) Ore blending optimization based on synergistic coupling ...
WhatsApp: +86 18221755073One, granulation in a rotary drum of moist raw sinter feed comprising iron ore fines, coke breeze, limestone, lime, dun- ... Two, sintering of granulated green mix on a moving sinter strand. The ...
WhatsApp: +86 18221755073At present around 6–7% of iron ore slimes, out of total production, are being generated and accumulated at iron ore mine sites of National Mineral Development Corporation Limited, India. The accumulated slimes of finer size and relatively inferior grade should be utilized in an economical way for sustainable mining. These slimes can be agglomerated into micro …
WhatsApp: +86 18221755073Since iron ore proportion is at higher side in the sinter mix, its size fraction is very important. JSW Steel sinter plant receives iron ore fines of –10 mm size from Bellary – Hospet region which consist of 3 to 9% bigger than 10 mm and 30 to 35% smaller than 0.15 mm size fraction.
WhatsApp: +86 18221755073Different raw material mixes have been used for the comparison. One sinter raw mix with rather coarse material and secondly a sinter raw mix with 70 -100 percent (basis iron ore) of pellet feed was used. 3.2 Apparatus Following mixing and granulation apparatus have been used during these tests. Mixing apparatus:
WhatsApp: +86 18221755073Since iron ore is the key constituent in sinter mix, its mean size and distribution are both very important parameters for the sintering process. ... The bond formation mechanisms greatly depend ...
WhatsApp: +86 18221755073Therefore, the change in pore structure and formation of cracks while heating up the sinter mix to 1200°C have a large influence on melt formation, because this changes the area available for sinter reactions. ... Influence of the materical properties of iron ore sinter feed on granulation effectiveness. Powder Technol., 55 (1988), pp. 141-151 ...
WhatsApp: +86 18221755073In this study, a mixture rich in K, Na, and Pb, composed of undesired elements rich iron ore A, sinter dust, and blast furnace dust (ore-dust mix,), is sintered along with the regular iron ore. The K, Na, and Pb compounds within the ore-dust mix are identified as alkali chlorides, alkali aluminosilicates, PbO, and PbSO4 using X-ray diffraction. The primary objective is to …
WhatsApp: +86 18221755073Granulation of sinter feed mix is one of the most important factors in determining the permeability of sinter bed and sinter properties like sinter yield, tumbler index, etc. To improve the granulation of sinter feed mix, various technologies like two-stage granulation process, coating granulation process, wet vertical ball mill and use of magnetic water have been reported. In …
WhatsApp: +86 18221755073Sintering is the most extensively used and economic agglomeration process to prepare iron ore fines for blast furnace use. Granulation is the most critical factor controlling iron ore sintering process, as it improves sinter mix permeability. Currently, sinter plants are receiving significant proportion (up to 40%) of − 150 μm micro-fines in iron ore fines, which makes …
WhatsApp: +86 18221755073Moreover, the conventional iron making unit, i.e. blast furnace requires the raw material in the form of iron oxide with a size range of 10–120 mm. Sintering is the oldest agglomerate thermal process using iron ore mineral fines of 0.5–8 mm, along with the reductant, fluxes, and other byproducts of the iron and steel industry operated ...
WhatsApp: +86 18221755073Granulation of sinter feeds is an indispensable step in the iron ore sintering process. Through granulating, iron ore fines, fluxes, fuels and recycle materials (e.g., return fines, dust, etc.) are …
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