Investigation on reduction of cement binder in cold bonded pelletization of iron ore fines

Dutta, Dipak Kumar; Bordoloi, D. N.; Borthakur, P. C.

doi:10.1016/s0301-7516(96)00033-6

Cited by 12 publications

(14 citation statements)

References 2 publications

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“…Research studies in this field mainly refer to iron ore tailing (IOT). Pioneering investigations (Dutta et al, 1992;Dutta, Bordoloi, & Borthakur, 1997) indicate that the most suitable mix-design to be used for coldbonded pellets containing IOT, must include cement/cement clinkers and other components.…”

Section: Mix-design For Pellets With Ore Tailings As Waste Materialsmentioning

confidence: 99%

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Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Ferraro

Colangelo

Farina

et al. 2020

Critical Reviews in Environmental Science and Technology

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This work provides a comprehensive review of research on the cold-bonding pelletization process used to produce lightweight aggregates (LWAs) using waste materials, to valorise the waste and, at the same time, minimize risks related to disposal. Research investigating various aspects of the cold-bonding process highlight: i) feasible mix-designs for pellet production; ii) the most relevant operating parameters affecting the process; and iii) the potential applications of the LWAs produced. The analysis gives a wide overview of the fundamental key-points that control the cold-bonding process. Data comparison provides a useful way to identify the optimal process conditions to allow development of optimum products. This involves the selection of the correct mix-design, including suitable binders and potential additives, and the selection of appropriate operating conditions, which are a function of the waste investigated, and/or waste mix characteristics. The review proposes an optimised approach to experimental studies on cold-bonding processes that has potential to enhance future process performance. Moreover, the present work provides a complete framework useful for decision-making for both manufacturers and researchers working to use this promising technique.

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Section: Mix-design For Pellets With Ore Tailings As Waste Materialsmentioning

confidence: 99%

“…Moreover, it is reported that production of pellets with good characteristics can be possible also with lowered (from 10% to 4-6%) amount of binder (by enhancing the binder surface area to a value of about 4100 cm 2 g -1 (Dutta et al, 1997). As an alternative to calcium silicate cements (i.e.…”

Section: Mix-design For Pellets With Ore Tailings As Waste Materialsmentioning

confidence: 99%

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Ferraro

Colangelo

Farina

et al. 2020

Critical Reviews in Environmental Science and Technology

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“…Nowadays, the cold bonded pelletizing technique is widely used to recycle industrial waste powders for producing artificial aggregates for application in concrete, and the raw materials (powder level) used are extended to various waste powders in recent years, such as iron ore fines (Dutta et al, 1997a), coal fly ash (Geso glu et al, 2007;Ferone et al, 2013) and bottom ash (Geetha and Ramamurthy, 2010a), granulated blast furnace slag (Geso glu et al, 2012), quarry dust (Thomas and Harilal, 2015), etc. The widespread research on the production of artificial aggregates using waste powders through cold bonded technique proposes a positive view on the investigation of producing artificial aggregate using BAF, which is rarely studied.…”

Section: Introductionmentioning

confidence: 99%

Employing cold bonded pelletization to produce lightweight aggregates from incineration fine bottom ash

Tang

Florea

Brouwers

2017

Journal of Cleaner Production

102

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“…By simply spraying water on the powdered materials in a rotating pelletizing disk, powder particles are agglomerated by gravity and friction over time and become spherical pellets [ 14 , 15 ]. Therefore, previous studies have attempted to manufacture artificial aggregates using waste powders such as fly ash, bottom ash, or iron ore fines through the cold-bonded pelletization technique [ 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

et al. 2020

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This study investigated the use of coal bottom ash (bottom ash) and CaO-CaCl2-activated ground granulated blast furnace slag (GGBFS) binder in the manufacturing of artificial fine aggregates using cold-bonded pelletization. Mixture samples were prepared with varying added contents of bottom ash of varying added contents of bottom ash relative to the weight of the cementless binder (= GGBFS + quicklime (CaO) + calcium chloride (CaCl2)). In the system, the added bottom ash was not simply an inert filler but was dissolved at an early stage. As the ionic concentrations of Ca and Si increased due to dissolved bottom ash, calcium silicate hydrate (C-S-H) formed both earlier and at higher levels, which increased the strength of the earlier stages. However, the added bottom ash did not affect the total quantities of main reaction products, C-S-H and hydrocalumite, in later phases (e.g., 28 days), but simply accelerated the binder reaction until it had occurred for 14 days. After considering both the mechanical strength and the pelletizing formability of all the mixtures, the proportion with 40 relative weight of bottom ash was selected for the manufacturing of pilot samples of aggregates. The produced fine aggregates had a water absorption rate of 9.83% and demonstrated a much smaller amount of heavy metal leaching than the raw bottom ash.

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Investigation on reduction of cement binder in cold bonded pelletization of iron ore fines

Cited by 12 publications

References 2 publications

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Employing cold bonded pelletization to produce lightweight aggregates from incineration fine bottom ash

Use of Coal Bottom Ash and CaO-CaCl2-Activated GGBFS Binder in the Manufacturing of Artificial Fine Aggregates through Cold-Bonded Pelletization

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