Utilization of Lime Fines as an Effective Binder as well as Fluxing Agent for Making Fluxed Iron Ore Pellets

Mandal, Arup Kumar; Sarkar, A.; Sinha, O. P.

doi:10.1007/s40033-015-0079-3

Cited by 18 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a high firing temperature (1250°C), the CCS value of core is found to be above the strength value of conventionally used pellets in blast furnace (i.e. 200 kg/pellet) (IBM 2012;Mandal and Sinha 2015;Mandal et al 2016).…”

Section: Cold Crushing Strengthmentioning

confidence: 88%

Effective utilisation of waste fines in preparation of high-basicity double-layer DRI pellets for minimisation of sticking

Mandal

Sinha

2016

Mineral Processing and Extractive Metallurgy

Self Cite

View full text Add to dashboard Cite

Sinter of high basicity is well known for affecting the permeability of the burden in the lower portion of the blast furnace due to the formation of more viscous slag. The high-basicity pellets possess less weather resistance if hardened below 1200°C due to the presence of free lime particles. When hardened above 1200°C, the weather resistance increases with increasing sticking tendency among the pellets due to the formation of low-melting eutectics. In the present investigation, efforts were made to make composite-coated iron ore-fluxed pellets to minimise the problems mentioned above. Lime addition to the core of pellets varied from 5 to 100%. The composite pellets subsequently were fired at 1150, 1200 and 1250°C for 30 min. Increasing lime content in the pellets resulted in increasing crushing and drop strength of the green pellets. The percent of reduction and cold crushing strength were found comparable to the conventional pellets with varying lime content up to 30% (core basicity 4.68). Weathering resistance was also found increasing trends with increasing firing temperature. XRD analysis revealed the presence of free lime particles inside the core of composite pellets with increasing lime content. From the present work, it could be concluded that the composite-fluxed pellet made with 20% lime in the core (core basicity 3.0) has enough physical strength (187 kg), a high percentage of reduction (96%) and excellent weather resistance properties.

show abstract

Section: Cold Crushing Strengthmentioning

confidence: 88%

Effective utilisation of waste fines in preparation of high-basicity double-layer DRI pellets for minimisation of sticking

Mandal

Sinha

2016

Mineral Processing and Extractive Metallurgy

Self Cite

View full text Add to dashboard Cite

show abstract

“…[64]- [66]. When quicklime (CaO) is mixed with water, hydrated lime (Ca(OH)2) can recrystalize and harden [21].…”

Section: Limementioning

confidence: 99%

Pelletization and sintering of New Zealand titanomagnetite ironsand

Mendoza

Yin

Zhang

et al. 2022

Advanced Powder Technology

View full text Add to dashboard Cite

“…Besides, according to the X-ray diffraction patterns of the primary slags shown in Fig. 4, the primary slags of 22,23) So the primary slags formed by acid iron ores have higher melting point and higher viscosity. Higher temperature is needed to separate with hot metal and the thickness of cohesive zone is much thicker.…”

Section: Softening and Melting Test Of Different Ferrous Burdenmentioning

confidence: 99%

Improving the Softening and Melting Properties of Ferrous Burden with High Al<sub>2</sub>O<sub>3</sub> Content for Blast Furnace by Ore Blending

Hong

et al. 2020

ISIJ Int.

View full text Add to dashboard Cite

In order to solve the problem of poor gas permeability of blast furnace caused by high Al 2 O 3 content in the burden, the softening and melting properties of sinter, pellets and lump ores are studied in this paper. The results show the differences between acid and basic iron ore materials. Based on this, this article study the influence of different kinds of pellets and lump ores blending with sinter on the softening and melting properties of comprehensive burdens. The results show that the self-fluxing pellet and porous lump ore with high aluminium content caused the Al 2 O 3 content of comprehensive burden to raise 0.26% compared to acid pellet and dense lump ore with low aluminium content. However, the highest pressure drop of comprehensive burden is reduced from 2.50 kPa to 1.70 kPa, the S-value is decreased from 198 kPa•°C to 114 kPa•°C. Therefore, this method of ore blending will improve the softening and melting properties of integrated burden.

show abstract

Utilization of Lime Fines as an Effective Binder as well as Fluxing Agent for Making Fluxed Iron Ore Pellets

Cited by 18 publications

References 18 publications

Effective utilisation of waste fines in preparation of high-basicity double-layer DRI pellets for minimisation of sticking

Effective utilisation of waste fines in preparation of high-basicity double-layer DRI pellets for minimisation of sticking

Pelletization and sintering of New Zealand titanomagnetite ironsand

Improving the Softening and Melting Properties of Ferrous Burden with High Al<sub>2</sub>O<sub>3</sub> Content for Blast Furnace by Ore Blending

Contact Info

Product

Resources

About