Customer case aboutinfluence of lime in the iron ore pellet making

influence of lime in the iron ore pellet making

Development on Iron Ore Pelletization Using Calcined Lime

In blast furnace (BF) iron making lime stone is used as source of CaO to neutralize the all acidic oxides present in iron ore and make fluid slag of suitable basicity. Limestone is the most common source of CaO, abundantly available and it has very good strength properties also which make it

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Effect of adding limestone on the metallurgical properties

Aug 10, 2015 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 (Ca,Mg(CO 3) 2) and olivine (Mg 2 SiO 4), but sometimes magnesite (MgCO 3

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Characterization of Fluxed Iron Ore Pellets as Compared to

Jul 11, 2015 The effect of lime addition in hematite iron ore pelletson its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with varying basicity i.e. 0-2.0.Increasing addition lime produced more calcium-alumino-silicate phases (slag)asevidenced by SEM-EDAX analysis.

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Utilization of Lime Fines as an Effective Binder as well

Jun 19, 2015 A laboratory study was carried out to characterize the physical, chemical and mechanical properties of lime fluxed (varying basicity 0–2) hematite iron ore pellets. Lime was used as additive as well as fluxing agent for making iron ore pellets. The effect of additives on different properties of pellets was studied. The findings show that on increasing the addition of lime, more of calcium

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Improving reducibility of iron ore pellets by optimization

furnaces. It has direct influence on improving productivity and lowering energy consumption in iron making process. The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, improving apparent porosity etc.

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The Effect of Lime Addition on Reduction of Iron Ore Pellets

Apr 18, 2019 The Effect of Lime Addition on Reduction of Iron Ore Pellets. For the commercial production of iron ore pellets from hematite ores, as it is practiced in various pellet plants, the addition of lime has shown to be an efficient means with a view to improving cold compression and abrasive strength of the indurated pellets

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Development on Iron Ore Pelletization Using Calcined Lime

of good quality iron ore pellets. 2. Experimental Hematite iron ore fines of Noamundi, India have been used as raw materials. Olivine has been used as MgO source in some experiments, limestone or calcined lime has been used as CaO input to increase the basicity of pellets and coke breeze is used as carbon source. All the raw materials

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Characterization of Fluxed Iron Ore Pellets as Compared to

Jul 11, 2015 Abstract. The effect of lime addition in hematite iron ore pelletson its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with varying basicity i.e. 0-2.0.Increasing addition lime produced more calcium-alumino-silicate phases (slag)asevidenced by SEM-EDAX analysis.

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(PDF) Utilization of Lime Fines as an Effective Binder as

ConclusionsFollowing conclusions were drawn from the present study:-It is possible to use lime-fluxed iron ore pellets as a raw material to minimise flux input in blast furnaces and avoid bentonite addition as an additive as used in conventionally prepared pellets.The preparation of fluxed iron ore pellets with high basicity (1.17) is possible

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Influence of flux additives on iron ore oxidized pellets

Aug 05, 2010 Six additives, i.e., limestone, lime, magnesite, magnesia, dolomite and light-burned-dolomite, were added for investigating their influences on the pellet quality. For green balls, adding lime and light-burned-dolomite makes the wet drop strength decrease firstly, and then increase with further increase of additive dosage. Ca(OH)2 affects the bentonite properties at the beginning, but the

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Effect of Reduced Flux Iron Ore Pellets on Removal of

Sep 19, 2017 Study on the fluxed iron ore pellets is under way for partial replacement of the iron ore and limestone used in the conventional charging method.4,5,10 Lime powder used for making fluxed pellets acts as a binder and helps enhance the basicity of the iron ore pellets. Sticking problems at the higher temperature of fluxed pellets have limited its

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Improving reducibility of iron ore pellets by optimization

furnaces. It has direct influence on improving productivity and lowering energy consumption in iron making process. The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, improving apparent porosity etc.

get price

WO2017006200A1 Coated iron ore pellets and a process of

Iron ore pellets including a core comprising iron ore, a first coating comprising lime, and a second coating comprising cement, wherein the first coating is disposed between a surface of the core and the second coating. A process for manufacturing the iron ore pellets whereby the first coating is applied to the core to form a coated core, the surface area coverage of the first coating is

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Limestone and Dolomite and their Use in Iron and Steel

May 08, 2013 Limestone and lime products are used as fluxing material both in ironmaking and in steelmaking. Basically limestone is used as a slag former, while dolomite is used as a slag former, slag modifier and as a refractory material. The process of iron making is the reduction of iron ore to produce iron.

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Ore Pellet an overview ScienceDirect Topics

For example, in blast furnace iron making, Fig. 5.1, iron oxide in the form of lumpy ore, sinter or pellet along with coke and limestone, are charged on the top of the furnace continuously. The charge slowly moves down and hot reducing gases produced by burning of coke in front of tuyeres move up through the bed of solids and finally escape

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Iron Ore Pelletizing Process: An Overview IntechOpen

Jul 11, 2018 The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process

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Iron Ore Pelletizing Process: An Overview

Pellets are obtained byadding an appropriate amount of water to the iron ore concentrate; this is a fundamental factor in the formation and growth of pellets, which creates a surface tension that holds the mineral grains cohesive, thus allowing their handling [6, 8].

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Adapting to Raw Materials Challenges: Part 1 Operating

In Part 1, we will look at how the chemistry of the iron oxide pellets affects the use of DRI/HBI in the EAF and the BF. We will explore what makes a pellet DR-grade and compare it with a BF-grade pellet, and discuss the advantages and disadvantages of lump ores and BF-pellets in the feed mix for making

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Limestone Addition In Iron Ore Pelletizing

Influence Of Lime In The Iron Ore Pellet Making. Limestone addition in iron ore pelletizing fluxed pellets iron ore Characterization of Fluxed Iron Ore Pellets as Compared to Conclusions Following conclusions were drawn from the present study 1 It has been possible to use fluxed iron ore pellets using iron ore and lime fines as a raw material

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Characterization of Fluxed Iron Ore Pellets as Compared to

Jul 11, 2015 The effect of lime addition in hematite iron ore pelletson its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with varying basicity i.e. 0-2.0.Increasing addition lime produced more calcium-alumino-silicate phases (slag)asevidenced by SEM-EDAX analysis.

get price

Utilization of Lime Fines as an Effective Binder as well

Jun 19, 2015 A laboratory study was carried out to characterize the physical, chemical and mechanical properties of lime fluxed (varying basicity 0–2) hematite iron ore pellets. Lime was used as additive as well as fluxing agent for making iron ore pellets. The effect of additives on different properties of pellets was studied. The findings show that on increasing the addition of lime, more of calcium

get price

Effect of Reduced Flux Iron Ore Pellets on Removal of

Sep 19, 2017 Study on the fluxed iron ore pellets is under way for partial replacement of the iron ore and limestone used in the conventional charging method.4,5,10 Lime powder used for making fluxed pellets acts as a binder and helps enhance the basicity of the iron ore pellets. Sticking problems at the higher temperature of fluxed pellets have limited its

get price

Limestone and Dolomite and their Use in Iron and Steel

May 08, 2013 Limestone and lime products are used as fluxing material both in ironmaking and in steelmaking. Basically limestone is used as a slag former, while dolomite is used as a slag former, slag modifier and as a refractory material. The process of iron making is the reduction of iron ore to produce iron.

get price

WO2017006200A1 Coated iron ore pellets and a process of

Iron ore pellets including a core comprising iron ore, a first coating comprising lime, and a second coating comprising cement, wherein the first coating is disposed between a surface of the core and the second coating. A process for manufacturing the iron ore pellets whereby the first coating is applied to the core to form a coated core, the surface area coverage of the first coating is

get price

Iron Ore Pelletizing Process: An Overview IntechOpen

Jul 11, 2018 The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process

get price

Iron and Steel Lhoist Minerals and lime producer

Adding hydrated lime at this stage to increase the pH enables water purification too, since it increases the precipitation of iron ore fines that can then be reclaimed. Iron ore agglomeration Our experts are available to help you maximize the performance of your iron ore agglomeration plants, using our products for sinter and pellet making.

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Iron Ore Pelletizing Process: An Overview

Pellets are obtained byadding an appropriate amount of water to the iron ore concentrate; this is a fundamental factor in the formation and growth of pellets, which creates a surface tension that holds the mineral grains cohesive, thus allowing their handling [6, 8].

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Ore Sinter an overview ScienceDirect Topics

For example, in blast furnace iron making, Fig. 5.1, iron oxide in the form of lumpy ore, sinter or pellet along with coke and limestone, are charged on the top of the furnace continuously. The charge slowly moves down and hot reducing gases produced by burning of coke in front of tuyeres move up through the bed of solids and finally escape

get price

Iron and Steel Lhoist Minerals and lime producer

Our calcium- and magnesium-based products and minerals are used throughout the iron- and steel-making process as binders or flux agents to form slag. Slag removes harmful impurities, such as silica, phosphorus and sulfur. Lhoist products also help improve productivity and enable you to comply more readily with environmental legislation.

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Analysis of abrasive damage of iron ore pellets

May 15, 2018 The abrasive wear of iron ore pellets (IOP) during transportation and storage in the iron making industry influences process quality and leads to air pollution. Therefore, prediction of the abrasive wear of IOP enables one to eliminate possible damages during processing. In the present research, the abrasive wear of IOP is analysed by numerical

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Effect of basicity on the structure characteristics of

Jan 15, 2019 High MgO content and the dehydroxylation of laterite ore particles lead to poor compressive strength of fired chromium-nickel bearing iron ore pellets at natural basicity. For improving the compressive strength of the fired chromium‑nickel bearing iron ore pellets, burnt lime was applied as the additive to improve the pellet structure.

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Characterization of composite coated iron ore fluxed pellets

India is the 4th largest steel/BFI producer India has large resource of iron ore In 2012, Iron ore fines 104.2 million tones (≈62.3%) For Effective utilization of mineral resources, the Iron ore fines needs to be utilized (Mineral conservation and waste utilization policy -GOI) Can be utilized as agglomerates (Sinter, Pellets etc) Sinter

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PROCESSI Variation in physico-chemical properties of iron

strength of green and dry pellets. Also the influence of cal-cium hydroxide on the final strength of fired pellets is re-markable. Shalabi et al. (1994) reported that the addition of CaO to the iron ore charge slightly decreases the productivity of green pellets, whereas average drop number and compressive strength of green pellets increases.

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