Ore fines undergo agglomeration processes, such as pelletising or sintering, before their use in reduction furnaces. The material produced in one of the stages of sintering is the focus of this work.

The micropellets produced with BFD and coke fines (8wt%-12wt%) were used in iron ore sintering and were observed to reduce the coke breeze consumption by 3%-4%.

Request PDF | On Jul 13, 2015, Alain Mutombo published Effect of Concentrate and Micropellet Addition on Iron Ore Sinter Bed Permeability | Find, read and cite all the research you need on ...

Like other sintering processes, iron ore sintering converts iron ore fines of often − 8 mm sizing into larger agglomerates, namely, sinter, between 5 and 50 mm particle size, which possess the physical and metallurgical characteristics and gas permeability required for efficient blast furnace operation.As shown in Figure 14.1, iron ore sintering is carried out in three …

Sintering 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).

With the depletion of high-grade lump iron ore, concentrates have been identified as an alternative material for sinter making. In this study, the effect of concentrate and micropellet...

Effect of concentrate and micropellet additions on iron ore sinter bed permeability. A. M. Nyembwe, R. D. Cromarty, and A. M. Garbers-Craig [email protected ... P. C. 1999. A combined model for granule size distribution and cold bed permeability in the wet stage of iron ore sintering process. International Journal of Mineral Processing, 57, (1 ...

Granule shape based on morphological observations (Powers, 1953). The raw materials used in this study consisted of fine iron ore, concentrate, micropellets, return fines, coke breeze, limestone, and dolomite. The three iron ore bearing materials (fine iron ore, concentrate, and micropellets) are respectively shown in (Figure 6).

Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. In this chapter, the sintering process is first described and the key steps of the sintering process, namely, granulation and thermal densification, are identified.

The physicochemical and thermal phenomena involved in the process are however both complex and numerous, and perhaps could be summarized as given below: gas flow through the porous sinter bed (i.e. through the wet sinter mix, dry zone and the sinter product); gas-solid heat exchange; drying of the wet micropellet and the consequent change in ...

Correspondingly, 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 ...

Moreover, 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 ...

In case of chromite, the temperature required for sintering is about 200 0 C more than that required for iron ore sintering. The process conditions for manganese ore sintering are almost similar to that for iron ore. The author has actively contributed to projects for setting up of batch type (capacity 15000 tpa) sinter plants at industry site.

Ultrafine iron oxide wastes such as slime, blue dust and Linz–Donawitz (LD) converter sludge have very limited use in sintering of iron ore due to their excessive fineness (−50 μm). Pelletisation of these ultrafine materials for use in blast furnace involves high temperature curing, which is a highly energy intensive process. Briquetting of LD sludge requires costly …

In iron ore sintering, raw materials including iron ore fines, fuel, fluxes, and return fines must first be mixed and granulated; the produced granules are then charged onto moving pallets to form a green packed bed with a height of 600–800 mm. The top surface of the bed is ignited by natural gas for several minutes, introducing a narrow ...

during sintering which could have a drastic impact on sinter productivity. In this study the use of iron ore concentrate and micropellets as sinter feed was evaluated. Five mixtures containing different proportions of iron ore concentrate and micropellets, together with iron ore fines, were prepared. These mixtures

It was found that the addition of iron ore concentrate and/or micropellets to the sinter feed resulted in a significant increase in permeability of the granulated bed, but a large …

With the depletion of high-grade lump iron ore, concentrates have been identified as an alternative material for sinter making. In this study, the effect of concentrate and micropellet additions on the permeability of the sinter mixture was investigated.

Zinc extraction residue, a solid waste generated from the treatment of zinc-containing dust in rotary kilns, is commonly stockpiled in steel companies for extended periods. It poses significant disposal challenges and environmental pollution risks. So far, research on the treatment of zinc extraction residues has been slow, inadequate, and sporadic. For this gap, a …

In iron ore sintering, granule deformation and compaction can be responsible for significant losses in bed voidage and green bed permeability. In this study, uniaxial compression tests have been used to examine the bed strength of granulated single and binary iron ore sinter mixes. The results show that at low moistures, bed strength is dependent on the granule layer …

Keywords: iron ore sinter; iron ore concentrate; micropellets; mineralogy; tumble index; low temperature reduction disintegration index . 3 1. Introduction ... is therefore necessary to agglomerate the fine ore before it is charged into the blast furnace. This is done through sintering or pelletization, depending on the particle size ...

In iron ore sintering, granule deformation and compaction can be responsible for significant losses in bed voidage and green bed permeability. ... In this study, the effect of concentrate and micropellet additions on … Expand. 21. Highly Influenced. 7 Excerpts; Save. ... The permeability of mixes before ignition and during sintering was ...

In hybrid pellet sintering process, iron ore concentrate of relatively finer size is first converted into micro-pellets and these micro-pellets are used in place of iron ore fines.

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 …

The present work aims at performing prediction validation for the physical properties of coke layered and nonlayered hybrid pelletized sinter (HPS) using artificial neural networks (ANNs). Physical property analyses were experimentally performed on the two HPS products. The ANN model was then trained to obtain the best prediction results with the grid …

Sinter is a product of the iron ore sintering process, which is a widely used pretreatment for ironmaking raw materials (Zhou et al., 2017a). ... The raw materials were mixed in the reversible spiral drum mixer for 1 min before being transferred to the granulation drum. Water was added for the granulation process, which lasted 10 min. ...

Raw mixes of iron ore sinter feed were prepared under a variety of conditions. The permeability of mixes before ignition and during sintering was examined using a conventional permeameter and a small instrumented sinter pot, respectively. The sinter pot consisted of a gas preheater and a sample bed 29 mm high so that pressure drop of high temperature zones could be measured …

Automated optical image analysis of natural and sintered iron ore. E. Donskoi, ... J.R. Manuel, in Iron Ore, 2015 4.2.2 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 …

The production of lower grade iron ore has been increasing due to the depletion of high-grade lump ore. ... Effect of concentrate and micropellet additions on iron ore sinter bed permeability ... (13-15 July 2015, Perth, Western Australia) and has subsequently been revised and extended before consideration by Mineral Processing and Extractive ...