Dissolution Characteristics of CO<sub>2</sub>-Treated Fluxed Pellets in Hot Metal Bath

Pal, Jagannath; Ghorai, Soumitra; Singh, D P; Goswami, M C; Bandyopadhyay, Debkumar; Ghosh, Dibyendu

doi:10.1080/08827508.2010.530717

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…It dissolves very fast in the hot metal bath. Dissolution time at varying temperature is shown in Figure 7 (Pal et al 2011), which is around 30 min at 1400°C hot metal temperature. After melting/dissolution, its slag has been analyzed by XRD and, as shown in Figure 8 (Pal et al 2011), contains mainly Ca-iron oxide low melting slag.…”

Section: Binderless Cold Bonded Super Fluxed Pelletmentioning

confidence: 99%

Innovative Development on Agglomeration of Iron Ore Fines and Iron Oxide Wastes

Pal

2018

Mineral Processing and Extractive Metallurgy Review

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In steel industry and in mines, a significant amount of ultra-fines waste iron oxides and iron ore fines is generated. Utilizations of these fines are required to reduce the environmental hazards and conserve the natural resources. Some of these fines are normally used in sintering practice. However, sintering has a limitation of accepting ultra-fines materials. Pelletizing can use ultra-fine iron oxides. However, suitable technology is required for preparation of good quality pellets. Some of the fines, viz. blast furnace (BF) flue dust, Linz Donawitz (LD) converter sludge etc., are not suitable due to their high alkali and Zn content. Some other material like slime is not considered to be suitable in normal pelletizing practice, because of its high alumina and silica content and excessively fine size. On the other hand mill scale and blue dust have poor green bonding property. Therefore, suitable technologies are required to be developed for their utilization/recycling. This paper discusses the various technologies developed such as (i) developing flux for basic oxygen steelmaking process, (ii) improved pelletizing practice for better reducibility, lower reduction degradation and replacing bentonite binder, and (iii) special quality sinters for improving micro-fines utilization. These technologies may have very good application potential.

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Section: Binderless Cold Bonded Super Fluxed Pelletmentioning

confidence: 99%

Innovative Development on Agglomeration of Iron Ore Fines and Iron Oxide Wastes

Pal

2018

Mineral Processing and Extractive Metallurgy Review

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“…sinter, briquette, or pellet. Additionally, preparation of such agglomerates may provide an opportunity toward proper utilization of iron ore fines and limestone fines simultaneously (Pal et al, 2011) In conventional method, Lime Stone and Dolomite in bulk are being used as flux inside the blast furnace. The main problem of adding these as a flux is 'alkali loading' inside the furnace.…”

Section: Introductionmentioning

confidence: 99%

Pelletisation Behavior of Fluxed Iron Ore Pellets of Varying Basicities Made with Waste Fines

2013

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The present study deals with the utilization of fines generated from comminution process (crushing, grinding and screening) of the Run of Mines into value added products i.e. fluxed iron ore pellets. The study comprises to understand the physical and mechanical behavior of five distinguished chemical compositions of green and dried iron ore pellets with respect to a typical Mini Blast furnace (MBF) burden data and furnace operating parameter. The maximum basicity of pellets was calculated 2.37 to make slag neutral when blast furnace runs at 100% high ash coke (avg. ash content= 29%). The crushing strength and drop number of various green pellets were measured. Green Crushing Strength was decreased with increasing lime fines. The addition of lime fines as a burnt lime, which has acicular structure creates less plasticity and brittle like fracture occurred. Due to formation of hard CaCO3 layer on the surface, after increasing lime contain crushing strength was increased in the air and oven dry pellets with respect to acid pellet (0% lime fines addition).

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