reducibility of iron ore and coke rate in blast furnace search results

CFD Investigation of the Effects of Iron Ore Reducibility ...

The effects of iron ore reducibility and coke reactivity in the shaft region of a blast furnace are studied. A sensitivity analysis of varying reaction rates of ore and coke on gas utilization ...

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Enhancement of Iron Ore Sinter Reducibility through Coke ...

It has been noticed higher amount and higher heating value of blast furnace top gas could be generated through COG injection into the blast furnace. 16) Although the injection of COG into the blast furnace is practiced in some countries with different injection rate from about 30 to 280 m 3 /tHM but its effect for example on the sinter ...

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reducibility of iron ore and coke rate in blast furnace

Nov 27, 2020  Sintering studies of Iron Ore Fines of HospetSandur ... many advantages in blast furnaces like a) Use of iron ore fines, coke breeze, metallurgical waste, lime and dolomite fines for hot metal production, b) Better reducibility, c) Increased blast furnace productivity, d) Improved quality of hot metal and e) Reduction in Coke consumption rate in blast furnaces.

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Influence of nut coke on iron ore sinter reducibility ...

(2010). Influence of nut coke on iron ore sinter reducibility under simulated blast furnace conditions. Ironmaking Steelmaking: Vol. 37, No. 3, pp. 219-228.

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Investigation of the Effects of Coke Reactivity and Iron ...

Hence, it is necessary to select coke with appropriate reactivity, in accordance with iron-ore reducibility, instead of blindly pursuing high-reactivity coke in actual operation. The use of coke with high reactivity in the ironmaking blast furnace (BF) has yet to be explored, and a thorough understanding is still required to clarify the effect ...

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Improving reducibility of iron ore pellets by optimization ...

(800-1000 °C). The reducibility improvement of iron bearing materials can improve the indirect reduction in blast furnace and thereby increase productivity and quality of hot metal and decrease energy consumption. Use of agglomerates such as pellets and sinter in blast furnaces is increasing day by day to utilize fines and concentrates ...

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Harbour Process.docx - Reduction of iron ore in a blast ...

Reduction of iron ore in a blast furnace: Optimum conditions: At500°C 3Fe 2 O 3 +CO→2Fe 3 O 4 +CO 2 Fe 2 O 3 +CO→2FeO+CO 2 At 850°C Fe 3 O 4 +CO→3FeO+CO 2 Based on the Le-Chatelier principle, if the temperature goes above the optimum level, it favors the formation of reactants for both the reaction. Extracting Iron very Common Found in Australia, element in earth canada .

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Reduction of Iron Ore Pellets, Sinter, and Lump Ore under ...

Mar 23, 2020  Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high-temperature furnace at four different temperatures (700, 800, 900, and 1000 °C) for 300 min.

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Analysis of factors that limit the production rate and ...

Nov 29, 2017  An engineering analysis indicates that the coke rate in present blast-furnace practice is set not by chemical or thermal needs but to give adequate charge permeability for economical driving rates. An equation showing interrelations among pressure drop, gas flow, and charge characteristics has been derived. Flooding conditions and the location of the fusion zone are discussed. Maximum ore

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Using a Mathematical Model of Counter-Current Flow in a ...

Flow in a Blast Furnace to Evaluate Reducibility of Iron‐Ore‐Bearing Raw Materials Pavlina Pustejovska, Jiri Tuma, Vladimir Stanek, Jiri Kristal, Simona Jursova, ... actual consumption of coke in the blast furnace. Now the ... rate of the mass loss in the 40-th and 50-th minute of

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LKABs Experimental Blast Furnace for Evaluation of Iron ...

The experimental blast furnace has a working volume of 8,2 m3 and a diameter at tuyere level of 1,2 m. It is designed to operate at a low fuel rate. During hot commissioning a coke rate of 510-515 kg/thm was reached. This meets our demands well, and is important as it ensures that the composition of the reducing gas is similar to that in a ...

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iron ore for blast furnace

Blast furnace (BF) has always been the dominant pro-ducing unit of pig iron, since it successfully satisfies those fundamental goals through generating the hot metals with maximal plant availability, minimal fuel rate, consistent quality, and least costs.1) Cohesive zone (CZ) in the infe-rior BF part is a region where iron ore starts softening and

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Application of High Ratio Coke Mixed Charging Technique

blast furnace operation in the future. Ore-coke mixed charging, in which coke is mixed in the sinter or iron ore raw material and charged into the blast furnace, is known as one technique for achiev-ing these objectives1,2). Although this is a technique which improves the permeability and reducibility of

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Harbour Process.docx - Reduction of iron ore in a blast ...

Reduction of iron ore in a blast furnace: Optimum conditions: At500°C 3Fe 2 O 3 +CO→2Fe 3 O 4 +CO 2 Fe 2 O 3 +CO→2FeO+CO 2 At 850°C Fe 3 O 4 +CO→3FeO+CO 2 Based on the Le-Chatelier principle, if the temperature goes above the optimum level, it favors the formation of reactants for both the reaction. Extracting Iron very Common Found in Australia, element in earth canada .

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Decreasing Coke Rate under All-Pellet Operation in Kobe

low coke rate operation this time, and this section mainly focuses on the measures for raising the ore melt down temperature. 2.1 Effectof internal volume of blast furnace on ore melt down control In general, the furnace height decreases as the internal volume of the blast furnace decreases. For this reason, the height from tuyeres to the bottom

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Using a Mathematical Model of Counter-Current Flow in a ...

Flow in a Blast Furnace to Evaluate Reducibility of Iron‐Ore‐Bearing Raw Materials Pavlina Pustejovska, Jiri Tuma, Vladimir Stanek, Jiri Kristal, Simona Jursova, ... actual consumption of coke in the blast furnace. Now the ... rate of the mass loss in the 40-th and 50-th minute of

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Chemical, Mineralogical and Metallurgical Characterization ...

blast furnace as a result of prior calcinations outside the furnace and thus reduces the coke rate (Singh and Deo, 1995). Incorporation of flux in the burden through sinter, therefore, greatly improves the blast furnace performance, since the formation of slag then becomes relatively easy and it forms at the correct level in the blast furnace.

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Reduction of Pellets-Nut Coke Mixture under Simulating ...

In recent years an intensive work has been carried out to decrease the coke losses of the blast furnace through mixing small-sized coke called ‘‘nut coke’’ in the iron ore burden layers. In order to clarify the influence of nut coke on the pellets reducibility, industrial iron ore pellets were reduced with and without nut coke participation under different temperatures and atmospheres.

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Recent Progress in Ironmaking Technology for 2 Mitigation ...

sintering machine, which produces sintered ore as a raw material for the blast furnace, coke ovens that produce coke, which is important as a reducing agent, and hot stoves that generate the high temperature (approx. 1 200°C) hot blast blown into the blast furnace. Large amounts of CO2 are generated by the reduction reaction (Fe2O3+3CO → 2Fe ...

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LKABs Experimental Blast Furnace for Evaluation of Iron ...

The experimental blast furnace has a working volume of 8,2 m3 and a diameter at tuyere level of 1,2 m. It is designed to operate at a low fuel rate. During hot commissioning a coke rate of 510-515 kg/thm was reached. This meets our demands well, and is important as it ensures that the composition of the reducing gas is similar to that in a ...

More

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

•blast furnace benefits of lower SiO2 levels are lower slag volumes. •reduction of pellet SiO2 from 4.30 to 4.00% reduces slag volume by 10 kg/T which reduces coke rate by 2 kg/T and increases hot metal production by 0.5% or about 20 tons/day for a furnace initially producing 4000 tons/day.

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Iron and Steel - Converting by-products to feedstock - Steele

In addition to producing feedstock for its own blast furnaces, the mill also supplies a leading Indian steelmaker with extruded briquettes, which is charging between 3-5% in a high-volume furnace. Result: The homogenous blend of iron oxide fines and fine carbon particles have driven a 20%-plus reduction in coke rates.

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Blast Furnace Productivity and the Influencing Parameters ...

Jun 23, 2013  Blast Furnace Productivity and the Influencing Parameters. Blast furnace (BF) ironmaking is the most viable means of producing hot metal (HM) mainly because of its well established and proven performance, flexible raw material usage, and high thermal energy conservation capability. It is the most dependable process of iron making.

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Preparation of MgO added iron ore pellets and effects on a ...

Iron ore pellets as the indispensable burden of blast furnace show many benefits, such as high iron grade(> 63%TFe), high physical strength and uniform and size distribution, high and even porosity, less loss on ignition or volatiles, easy reducibility, and lower abrasion during transportation and use [1]. In recent years, under the pressure of ...

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The Reducibility of the Iron Ore Materials as Instrument ...

The technique of defining the minimum coke consumption in blast furnace smelting allows for the calculation of the reserve of coke economy on the basis of thermodynamic principles. In this reserve the constitutive role belongs to the reducibility of the iron ore materials (the agglomerate and pellets). In the present paper, the questions of the reduction kinetics of the iron ore materials and ...

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Enhancement of Iron Ore Sinter Reducibility through Coke ...

The injection of free resources of coke oven gas (COG), which is rich with hydrogen, into the modern blast furnace is one of such measures. In order to clarify the effect of COG injection on the reduction processes in the blast furnace; iron ore sinter was isothermally and non-isothermally reduced with different gas compositions at different ...

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INTER-INFLUENCING FACTORS IN AFFECTING BF COKE RATE ...

Key words: blast furnace, coke rate, regression equation, sinter, burden, statistics . Preamble An blast furnace is a typical case of multivariate system which is subjected to a large ... Content of -12 mm size fraction in iron ore lump (X9), % Reducibility of sinter (X3), %

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(PDF) Blast Furnace Operating Conditions Manipulation for ...

FULL PAPERsteel-research increasing the amount of natural gas injection in blast furnace of EISCO will decrease the degree of direct reduction of iron oxide and consequently will decrease the amount of coke consumption and the cost of hot metal production and of course CO 2 emission will be decreased as well.Figure 1 .1Effect of reducing ...

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BLAST FURNACE VALUE IN USE MODEL AND ITS

of the iron ore on the blast furnace, using a 5 stage mass and energy balance, ... Blast Volume Coke Rate Ore Grade Sinter Rate Flooding Burden Pressure Drop Raw Material Size Distribution Size Reduction ... Reducibility Index_40 (RI) 0.58 1 1.2 M+30 76.89 Reduction Disintegration Index (RDI)+6.3 60 90 71.7 M+10 7.27

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Chemical, Mineralogical and Metallurgical Characterization ...

blast furnace as a result of prior calcinations outside the furnace and thus reduces the coke rate (Singh and Deo, 1995). Incorporation of flux in the burden through sinter, therefore, greatly improves the blast furnace performance, since the formation of slag then becomes relatively easy and it forms at the correct level in the blast furnace.

More

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

•blast furnace benefits of lower SiO2 levels are lower slag volumes. •reduction of pellet SiO2 from 4.30 to 4.00% reduces slag volume by 10 kg/T which reduces coke rate by 2 kg/T and increases hot metal production by 0.5% or about 20 tons/day for a furnace initially producing 4000 tons/day.

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A review on nut coke utilisation in the ironmaking blast ...

In the ironmaking blast furnaces, nut coke (10–40 mm; 2–23 wt-%) is charged together with the ... ferrous burden (iron ore, sinter and pellets) and regular coke are charged in alter- ... to metallic iron (Fe). The rate of first reaction is faster than the second reaction. Freshly reduced iron (Fe) do ...

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Study the effect of catalyst (THERMACT-BF) on reduction ...

Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel. 98% of the mined iron ore is used to make steel. Coke is used as a reducing agent in smelting iron ore in a blast furnace The carbon monoxide produced by its combustion reduces iron oxide (hematite) in the production of the iron product.

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CALCULATION OF BLAST FURNACE PARAMETERS -

Apr 17, 2020  A blast furnace is a type of metallurgical furnace used for smelting to produce pig iron. Here is the calculation of BF parameters.A. ... Iron ore per ton =1550 Kg, Mn ore per ton = 30 kg ... Mn ore rate – 30 kegs / THM. Coke rate – 650 kegs /THM F.C – 87 %. Solution : Step : 1

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Harbour Process.docx - Reduction of iron ore in a blast ...

Reduction of iron ore in a blast furnace: Optimum conditions: At500°C 3Fe 2 O 3 +CO→2Fe 3 O 4 +CO 2 Fe 2 O 3 +CO→2FeO+CO 2 At 850°C Fe 3 O 4 +CO→3FeO+CO 2 Based on the Le-Chatelier principle, if the temperature goes above the optimum level, it favors the formation of reactants for both the reaction. Extracting Iron very Common Found in Australia, element in earth canada .

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Sinter Plant - MECON

continuous furnace hanging and increases coke rate in blast furnace. If FeO is less, sinter will be weak causing more fines generation leading continuous to furnace hanging So, FeO should always be optimum. To improve the productivity and quality of sinter following requirements to be fulfilled Selection of raw materials Iron ore fines

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