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Iron ore fluxed pellets and their physical properties ...

Jun 01, 1985 · The moisture content of iron ore fluxed pellets was calculated proportionally according to the amount of water required by pure iron ore and pure limestone pellets (13.5% and 16.5% respectively). Therefore, a fluxed charge containing 10% limestone needs 13.8% water and a charge containing 20% limestone needs 14.1% water content.

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

Feb 01, 2021 · The RDI of the dolomite fluxed pellet (D) is reduced as compared to limestone fluxed pellet (L) since increased MgO content in the fluxed pellet (D) causes less strain in the pellet microstructure during reduction . Download : Download high-res image (163KB) Download : Download full-size image; Fig. 11. Reduction degradation index of fired pellets.

Effect of adding limestone on the metallurgical properties ...

Aug 10, 2015 · Limestone fluxed pellets are highly porous and therefore very reducible but physically weaker than non-fluxed ones. The CCS distribution (see Fig. 13) is broad and the standard deviation is high for both pellet grades; therefore, the average CCS value alone is not a proper indicator of the mechanical properties of the pellets.

Effect of basicity on the reduction swelling behavior and ...

Limestone fluxed iron ore pellets are reduced in CO-rich atmosphere generally accompanied by swelling behavior. If the reduction swelling index (RSI) exceeds the normal range (≥20%), it will seriously hinder the stable and anterograde production of iron making.

Iron ore fluxed pellets and their physical properties ...

Pelletization experiments of fluxed iron ore were carried out using Baharia iron ore (in Western desert, Egypt) and Rifai limestone (located east of Cairo). Fluxed pellets containing 10% and 20% limestone were produced in a laboratory balling drum. It was found that the pelletization kinetics were sensitive to the water content of the pellets.

EFFECT OF LIMESTONE ADDITION ON THE METALLURGICAL ...

pellets compared to the non-fluxed ones. •Limestone addition slightly decreased the cold crushing strength of the acid pellets and increased the fines formation in the hematite to magnetite reduction stage in the LTD test. However, the CCS and the LTD values for the fluxed pellets are estimated to be high enough for blast furnace use. 17.06 ...

(PDF) Improving the Fluxed Pellets Performance by Hydrated ...

In limestone-fluxed pellets with bentonite as a binder, although formation of calcium ferrite was noted at the basicity of 0.8, its formation in appreciable quantities was delayed until the ...

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

Improved pellet quality could be attributed to the formation of sufficient amount of silicate melt in basic pellets and high melting point slag in MgO pellets. Limestone fluxed pellets at 0.8 ...

Phase Equilibria and Slag Formation in the Magnetite Core ...

In the fluxed pellets studied here, limestone has decomposed (see Fig. 2b) and CaO has taken gaseous sulphur into a solid solution of CaO-CaS, ending up with a higher S content in the fluxed ...

Pellet, iron ore concentrste, sintered iron ore: buy from ...

Metinvest offers a range of iron ore pellets for the blast furnace process, such as non-fluxed pellets produced by Central GOK with a basicity of 0.1. and 65.5% iron content, non-fluxed pellets produced by SevGOK with a basicity of 0.12 and 62.5% iron content, and fluxed pellets with 60-61.9% iron content and a basicity of 0.5.

(PDF) Improving the Fluxed Pellets Performance by Hydrated ...

In limestone-fluxed pellets with bentonite as a binder, although formation of calcium ferrite was noted at the basicity of 0.8, its formation in appreciable quantities was delayed until the ...

Effect of Fluxing Agents on the Quality and Microstructure ...

Jun 01, 2017 · In the limestone fluxed pellets, to adjust the basicity of pellets from 0 to 0.8, flux was varied from 0 to 3%. In the pyroxenite fluxed pellets, to adjust the MgO content of pellets from 0 to 3.0%, pyroxenite was varied from 0 to 10% in the green pellets. Before firing, pellets were dried in the hot air oven at 150°C for 5 to 6 hours

Weathering Behavior of Newly Developed Highly Fluxed DRI ...

It is found that calcined lime fluxed pellet without bentonite and limestone shows very good dry compressive strength (3.5 kg/pellet) and improved green compressive strength (1.5 kg/pellet), drop ...

Weathering Behavior of Newly Developed Highly Fluxed DRI ...

Mar 12, 2021 · Abstract The weathering behavior of highly fluxed and reduced iron ore pellet (DRI-Direct Reduced Iron) having 4, 6, and 8 basicity and 65–98% R (R-reduction) are given in this paper. The primary objective has been to solve weathering issues related to DRI and fresh lime used in the secondary steelmaking process. Experimental studies indicated that the addition of lime during pellet

Improving Acid & Fluxed Pellet Metallurgical Properties

Oct 28, 2017 · The acid pellets were affected to a greater extent than the fluxed pellets, relative to both physical and metallurgical properties. Improved Organic Binder Pellets Hibbing Taconite pellets were made with an organic binder plus small amounts of limestone, to improve physical strength while retaining improvements in metallurgical properties with ...

BEHAVIOUR OF COATINGS ON OLIVINE FLUXED PELLETS

Different coatings on olivine fluxed blast furnace pellets were examined in LKAB’s experimental blast furnace, Luleå. The aim of coating is to decrease dust generation, prevent sticking and to bind alkali for smoother operation. The coating materials were kaolinite, bauxite, olivine and limestone. Uncoated pellets were studied for reference.

IRON AND STEEL - US EPA

primarily of iron ore, sinter, or pellets; coke; and limestone or dolomite. Iron and steel scrap may be added in small amounts. Near the bot tom of the furnace, preheated air is blown in. Coke is combusted i n the furnace to produce carbon monoxide which reduces the iron ore to iron. Silica and alumina in the ore and coke ash are fluxed with

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 ...

Pellet, iron ore concentrste, sintered iron ore: buy from ...

Metinvest offers a range of iron ore pellets for the blast furnace process, such as non-fluxed pellets produced by Central GOK with a basicity of 0.1. and 65.5% iron content, non-fluxed pellets produced by SevGOK with a basicity of 0.12 and 62.5% iron content, and fluxed pellets with 60-61.9% iron content and a basicity of 0.5.

Non-fluxed iron ore pellets - Metalloinvest

Jul 10, 2010 · Non-fluxed iron ore pellets (high grade) Minimum order. 5 tonnes (ex-factory) 69 tonnes (delivery by hopper cars) 69 tonnes (delivery by hopper cars) Transportation requirements. All types of transport modes can transport pellets, as long as it is in accordance with the transportation requirements for each specific mode of transport.

Salt, Sand and Stone

Limestone is needed in steelmaking as a fluxing agent. Some steel mills add limestone to the blast furnace and use unfluxed taconite pellets, while others have found that pellets fluxed at the taconite plant will produce higher tonnages of steel more efficiently. In

Critical factors in the development of BF burden materials

For fluxed type pellets containing limestone flux, this limit is most certainly higher due to how the slag builds and binds in the pellets and the necessary cold strength is a function of the pelletising process not a requirement for the blast furnace. For examples, Figure

US3754889A - Highly fluxed iron oxide pellet - Google Patents

A highly fluxed iron oxide pellet containing about 50 percent to about 95 percent iron oxide, about 20 percent calcium oxide plus magnesium oxide, not more than 10 percent silica, not more than 2 percent alumina, the remainder incidental impurities. The ratio of the calcium oxide plus magnesium oxide to the silica plus alumina in the pellet may be from about 0.5:1 to about 4.5:1.

自熔性球团矿_百度百科 - baike.baidu

自熔性球团矿(fluxed pellet),是碱度(CaO/SiO 2 )为0.8-1.2的球团矿物,组成和结构比较复杂,但仍以赤铁矿(Fe 2 O 3 )为主,赤铁矿连晶是其固结的基本形式。

fluxed pellets - archidom.org.pl

Limestone fluxed pellets were prepared at varying basicity (0 to 0.8) and pyroxenite fluxed pellets at varying MgO contents (0 to 3%) to study their effect on the metallurgical properties. Fired pellets were tested for their strength, RDI, reducibility and swelling.

Effect of Limestone and Dolomite Flux on the Quality of ...

Improved pellet quality could be attributed to the formation of sufficient amount of silicate melt in basic pellets and high melting point slag in MgO pellets. Limestone fluxed pellets at 0.8 ...

Development of fluxed blast furnace pellets with ...

The MPB1 fluxed pellet composition and metallurgical results are compared to MPBO in Tables 2 and 3. The chemistry of the MPB1 is suitable because it allows removal of some of the limestone charged to the furnace. This in turn decreases the required thermal energy and coke rate. The metallurgical

Review Recent Advances Blast Furnace in America

benefits of limestone-dolomite fluxed pellets. To-wards the end of the decade, fluxed pellets had been firmly established as a major product, accounting for about 30 o/o of North America's pellet production. Thetransition to fluxed pellets involved manychanges in plant equipment (e.g., flux grinding mills, pre-heat burners) and practices. Each ...

Various raw material used in blast furnace – blastfurnance

Mar 12, 2015 · Pellet : Pellets may be acid or fluxed with limestone or with other CaO-, MgO-containing materials. Acid pellets were charged in a blast furnace from the outset because of such disadvantages of fluxed pellets as lower mechanical strength and reducibility, sensitiveness to weathering and additional costs for the limestone grinding.

Characterization of bonding and crystalline phases in ...

In limestone-fluxed pellets with bentonite as a binder, although formation of calcium ferrite was noted at the basicity of 0.8, its formation in appreciable quantities was delayed until the basicity of 1.6. For the pellets produced with a combination of dolomite and limestone, even at the basicity of 1.6, only minor amounts of this phase were ...

Evolution of Structure and Metallurgical Properties of ...

Mar 11, 2021 · Due to the formation of a stronger MgO-containing binder, the strength of pellets fluxed with dolomite is higher than that of pellets fluxed with limestone. (3) Reduction strength (ISO 4696-1:2015) has a low value for samples with a basicity of 1.1–1.2, while reducibility (ISO 4695:2015) is high.

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

Improved pellet quality could be attributed to the formation of sufficient amount of silicate melt in basic pellets and high melting point slag in MgO pellets. Limestone fluxed pellets at 0.8 ...

US4326887A - Basic process of producing basic fluxed ...

A new fluxed pellet for use in iron-making is obtained by mixing and indurating about 1 to about 20%, by weight of the pellet, of ground melt shop slag fines with similarly ground iron ore concentrate, so as to achieve particular ranges of silica content, CaO/SiO 2 ratio, and MgO content. The melt shop slag fines have been considered a waste material, but contain significant slag and metal values.

Influence of flux additives on iron ore oxidized pellets

fluxed pellets were evaluated in Refs.[10−13], and suitable basicity and MgO content were also assured. Conclusions were established that limestone, dolomite, magnesia and so on could be used to make a fluxed pellet that had superior metallurgical properties relative to conventional acid pellets[14−16]. But there was lacking

Influence of Reducing Conditions on the Softening-Melting ...

terials (flux) such as limestone, and/or dolomite, into the pellet mix. Several investigators (4-9) have reported that fluxed pellets have higher reducibility and superior high­ temperature softening-melting (HTSM) properties. Kobe Steel, Ltd., has used HTSM properties for characterizing pellets used in its blast furnaces (10).

Formation of potassium slag in olivine fluxed blast ...

Limestone 40 LD-slag 48 Quartzite 13 Table 4 Hot metal quality, wt-% Temperature, uC 1448 C4.44 Si 1.36 S0.033 S distribution (S)/[S] 43 Eliasson et al. Formation of potassium slag in olivine fluxed blast furnace pellets Ironmaking and Steelmaking 2007 VOL34 NO 5 423. Published by Maney Publishing (c) IOM Communications Ltd and lowers toward ...

Behavior of fluxed lime iron oxide pellets in hot metal ...

Apr 19, 2013 · Lump lime as a flux material in a basic oxygen furnace (BOF) often creates problems in operation due to its high melting point, poor dissolution property, hygroscopic nature, and fines generation tendency. To alleviate these problems, fluxed lime iron oxide pellets (FLIP) containing 30% CaO were developed in this study using waste iron oxide fines and lime. The suitable handling strengths of ...

fluxes中文_fluxes是什么意思 - iChaCha

"fluxed sinter"中文翻译 熔剂性烧结矿 "fluxgate sensor"中文翻译 磁选通器传感器 "fluxed pellets"中文翻译 自熔性球团 "fluxgate-proton precession"中文翻译 质子旋进磁通脉冲磁力仪 "fluxed pellet"中文翻译 熔