use of limestone and dolomite in iron ore pellet production

MINING

(PDF) Calculating the value of iron ores in ironmaking and ...

According to Höganäs 2013 [10] the iron ore must have a suitable size distribution or specific surface area (m 2 /g or " Blaine index " ) to form good pellets. In some cases the ore will ...

Limestone and Dolomite and their Use in Iron and Steel Plant ...

In ironmaking limestone and dolomite are used in the production of sinter pellets and directly in blast furnace as fluxing materials. In case of steelmaking limestone and dolomite are used as lime or calcined dolomite both in the primary steelmaking (basic oxygen furnace electric arc furnace) and in the secondary steel making processes.

EFFECT OF SIZE DISTRIBUTION AND WATER CONTENT ON PROPERTIES ...

and depending on the desired end-properties the materials may be: iron ore fines limestone dolomite binders such as bentonite other additives and coke/coal powder. 1.3 Pelletisation: Advantages The iron ore pellets formed exhibit the following superior properties: Uniform size of 9 – 15 mm High and uniform porosity of 25-30%

International Journal of Mineral Processing

2011). In this study the focus was placed on limestone as an additive in the production of iron ore pellets and its effect on pellet properties. Some researchers have already studied the effect of basicity on the properties of iron ore pellets. One example is Umadevi et al. (2011) whocarried out basket trials with iron ore pelletswith ...

Iron Ore Pelletizing Process: An Overview | IntechOpen

Additives such as limestone dolomite and hydrated lime are used to modify the chemical composition of the pellets most often for correction of the basicity. 1 Certain substances such as hydrated lime serve as both additive and binder.

why limestone and dolomite using during iron ore pellets ...

The production of Iron ore pellets is a complex business measured in millions … to make use of Blue dust and ultra fine concentrate generated in the Iron ore … cases “fluxed pellets” are produced by additions of limestone dolomite silica etc .

International Journal of Mineral Processing

for iron ore pellet production are limestone (CaCO 3) dolomite (CaMg(CO 3) 2) and olivine (Mg 2SiO 4) but sometimes magnesite (MgCO 3) is also used. Fluxing agents are used not only to enhance slag formation but also to improve softening and melting properties andtoincreasethereducibilityoftheburdenmaterialsbeforesoftening

Usage of High-LOI Iron Ore Fines in Pellet Making

High-LOI iron ore fines are required for detailed laboratory pelletization studies and are used in pellet making. The received iron ore is martite–goethitic and hematite–goethitic form of ore with high LOI content. The iron ore consists of 57.7% Fe 6.19% SiO2 2.69% Al2O3 8.80% moisture and 8.85% LOI. From thermo-gravimetric analysis the ...

New pellet new life for United Taconite | Duluth News Tribune

The flux pellets mix limestone and dolomite with iron at the front end of the process instead of at the steel mill Korpela said saving the steelmaker time energy and money. "They like us to...

Iron Ore Pellets: North America BF and DR Grade Supply and ...

Iron Ore Pellets: North America BF and DR Grade ... such as limestone or dolomite in pelletizing or ... •DRI production will continue to be dominated by

Effect of adding limestone on the metallurgical properties of ...

In general the main types of pellets for the purposes of making iron are acid basic and fluxed. In order to produce high-quality pellets certain additives are important. The most common fluxing materials for iron ore pellet production are limestone (CaCO 3) dolomite (CaMg(CO 3) 2) and olivine (Mg 2 SiO 4) but sometimes magnesite (MgCO 3) is also used.

Improved Reduction Kinetics of Low Grade Iron Ore Pellet : An ...

Higher gangue in iron ore pellets leads to decrease high temperature properties (RDIRISI) Most fluxes are olivine Pyroxinite Dunite limestone and dolomite Indian fluxes are higher in gangue and LOI The proper combination of fluxes and its optimize dosage is the key to achieve desired pellet properties

use of limestone and dolomite in iron ore pellet production ...

The main materials used in the process of pelletization are Iron ore Additives like Bentonite Limestone Dolomite and Coke are used. » More detailed Iron Ore | ENRC

(PDF) Characterization of Fluxed Iron Ore Pellets as Compared ...

The present work illustrates the effect of limestone and dolomite as flux material in pelletization of an Indian goethetic-hematite iron ore with 59.75% Fe 4.52% SiO2 3.84% Al2O3 and 4.85% LOI.

Effect of limestone and dolomite flux on the quality of ...

For the preparation of pellet feed material the goethetic-hematite iron ore fines were thoroughly mixed with the additives: limestone dolomite and anthracite coal as per the plan of experiment. It should be noted that in the pelletization of goethetic-hematite ore there is no need to use any binding material as the ore itself acts as a self ...

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use of limestone and dolomite in iron ore pellet production