energy balance of iron ore
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energy balance of iron ore

Analysis on Material and Energy Balances of Ironmaking ...

In this study, a method to analyze material and energy balances in ironmaking system based on the kinetic-bases simulations of blast furnace operation, and it is applied to the previously reported results on some novel operations made by the authors. 2. Analyzing Method of Material and Energy Balance in Ironmaking System 2.1. Ironmaking System

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16 Energy Balances on Reactive Process - Weebly

16-1. Roasting of Iron Pyrite Ore From excess air information: Total O 2 in = 5.8437 kmol Total N 2 in = 21.983 kmol Gangue Balance: m 1 = 15.0 kg N 2 Balance: n 3 = 21.983 kmol S Balance (kmol) 2(85.0/120.0) = n 1 + (m 3 /120.0)(2) Fe Balance (kmol) (85.0/120.0) = (m 2 /159.02)2 + (m 3 /120.0) O 2 Balance (kmol) 5.8437 = n 2 + n 1 + (m2/159.02)(1.5)

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Energy Efficiency in Iron Ore Mining Electrical India ...

Major energy consumption area in iron ore mining The electrical energy accounts for less than 5 per cent of energy used in iron ore production. The major energy consumption is contributed by diesel used for transportation.

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Energy Material Balance Environmental activities ...

In addition, Nippon Steel itself generates 89% of the electricity it uses at steelworks, 81% of which is from internally generated energy sources such as waste heat and by-product gases. By not wasting but utilizing energy generated within the steelworks, we do our part to reduce CO 2 emissions.

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FACT SHEET Energy use in the steel industry

• The energy efficiency of steelmaking facilities varies depending on production route, type and quality of iron ore and coal used, the steel product mix, operation control technology, and material efficiency. • Energy is also consumed indirectly for the mining, preparation, and transportation of raw materials. In the blast

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Charge Calculations in Pyrometallurgical Processes

(iron ore)= Cu 2 S(in ore) = 17.5% * 1000 = 175 kg SiO 2 (slag) Cu 2 S(in Cu-conc.) = 0.35 * X 0.15% * 1000 + 0.40X + 0.20Z = 0.35U Cu 2 S(in matte) = 37.5% * Y = 0.375 Y Equation 2: 0.40X + 0.20Z – 0.35U = -150 Equation 1: 175+ 0.35X = 0.375Y Fe Balance: Fe(Cu ore) + Fe(Cu conc.) + Fe(iron ore) = Fe(matte) + Fe(slag)

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Lecture 9 Energy balance and metal extraction Contents

Lecture 9 Energy balance and metal extraction ... employed to extract metal from ore by pyrometallurgical route. These are: roasting, matte smelting, ... Pig iron Reduction smelting Steel ...

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Energy Material Balance Environmental activities ...

In addition, Nippon Steel itself generates 89% of the electricity it uses at steelworks, 81% of which is from internally generated energy sources such as waste heat and by-product gases. By not wasting but utilizing energy generated within the steelworks, we do our part to reduce CO 2 emissions.

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Charge Calculations in Pyrometallurgical Processes

(iron ore)= Cu 2 S(in ore) = 17.5% * 1000 = 175 kg SiO 2 (slag) Cu 2 S(in Cu-conc.) = 0.35 * X 0.15% * 1000 + 0.40X + 0.20Z = 0.35U Cu 2 S(in matte) = 37.5% * Y = 0.375 Y Equation 2: 0.40X + 0.20Z – 0.35U = -150 Equation 1: 175+ 0.35X = 0.375Y Fe Balance: Fe(Cu ore) + Fe(Cu conc.) + Fe(iron ore) = Fe(matte) + Fe(slag)

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Energy survey of the coal based sponge iron industry ...

01-09-2015  Iron ore. The temperature dependent value of C p of iron ore, Fe 2 O 3, is shown through Eq. . (15) C p = 24.72 + 0.01604 × T − 423, 400 / T 2 kcal / kmol K. The density of iron ore is 325 lb/ft 3 or 5206 kg/m 3. 3.2.2. Sponge iron. Hajidavalloo and Alagheband show

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Energy Efficiency and Iron and Steel Production –

The energy intensity of this route ranges from 9.1 to 12.5 GJ per ton of crude steel where the input is only the steel scrap. Another way to produce crude steel is by directly reducing iron ore to produce direct reduced iron (DRI). The average energy intensity is typically between 28.3 and

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Influence of direct reduced iron on the energy balance

Abstract. A model of the EAF energy efficiency was developed based on a closed mass and energy balance of the EAF melting process. This model was applied to industrial EAFs in steel industry charged with scrap or with mixes of scrap and DRI. Complex mass and energy conversion in the EAF was simplified with the introduction of mass and energy ...

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Energy Use in US Steel Manufacturing - Stanford University

This includes the reduction of raw iron ore into pig iron and then conversion of pig iron to steel. Alternatively, energy use with an electric arc furnace is often done with recycled steel rather than pig iron. This means that energy use for electric arc furnace production will be approximately 2.25 × 10 9 J per ton of steel, 10× less energy than production from raw

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Understanding and using the Energy Balance – Analysis

The energy balance is derived from data which can be measured by national authorities. As such the energy balance is also an essential tool used to check data accuracy, as large statistical differences in energy units, apparent energy gains or large losses in transformation processes, or large unexplained variations in shares or in high-level indicators may all indicate underlying data problems.

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The Use of Hydrogen in the Iron and Steel Industry - Energy

Chemical Processes to Reduce Iron Oxide Fe. 3. O. 4 + H. 2 = 3FeO + H. 2. O FeO + H. 2 = Fe + H. 2. O Fe. 3. O. 4 + CO = 3FeO + CO. 2 FeO + CO = Fe + CO. 2. 4. Reduction by CO Reduction by H. 2. THE USE OF HYDROGEN IN THE IRON AND STEEL INDUSTRY. Consumes 500 Nm. 3 /t. iron. of CO. Consumes 500 Nm. 3 /t. iron. of H. 2

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Reduction of Iron Oxides with Hydrogen—A Review ...

During reduction of a porous iron ore particle, the following process steps occur: 19, 22-24 mass transfer of the gaseous species (reducing gases H 2 and CO) from the gas stream through the laminar layer of the oxide to the interface; diffusion through macro‐ and micropores to the oxide interface; adsorption at the oxide interface; oxygen removal via phase boundary reaction—formation of H 2 O, CO 2, and iron

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Lecture 9 Energy balance and metal extraction Contents

Lecture 9 Energy balance and metal extraction ... employed to extract metal from ore by pyrometallurgical route. These are: roasting, matte smelting, ... Pig iron Reduction smelting Steel ...

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Influence of direct reduced iron on the energy balance

Abstract. A model of the EAF energy efficiency was developed based on a closed mass and energy balance of the EAF melting process. This model was applied to industrial EAFs in steel industry charged with scrap or with mixes of scrap and DRI. Complex mass and energy conversion in the EAF was simplified with the introduction of mass and energy ...

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Ironmaking Alternatives Screening - Energy

percentage (7%) is from Direct Reduction Processes and the balance is other iron sources. IRON UNIT PRODUCTION Iron Production (1999) Total 583.61 million metric ton 7% 92% 1% DRI PIG IRON OTHER Of the Alternative Direct Iron Reduction Processes, 67% of the DRI is produced by the Midrex Shaft Furnace DRI processes. The second-most

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Energy analysis of pelletising in a straight grate ...

process integration tool for an iron ore upgrading process system. Proceeding of the Symposium on Environmental Issues and Waste Management, Bangkok, Thailand, 11-13 Dec 2007 B. Nordgren S, Dahl J, Lindblom B, Wang J. Process integration in an iron ore upgrading process system - analysis of mass and energy flows within a straight grate

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Iron Ore - Department for Energy and Mining

In that ~100 year period the price changed only once, from A$2/tonne to A$9/tonne in 1965. Since 2003 the iron ore price has fluctuated, reaching a peak of ~A$120/t in 2011. Since then the price has fallen in an erratic but steady decline some 40% to a September 2014 price of A$85-90/t. Back to top.

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Understanding and using the Energy Balance – Analysis

The energy balance is derived from data which can be measured by national authorities. As such the energy balance is also an essential tool used to check data accuracy, as large statistical differences in energy units, apparent energy gains or large losses in transformation processes, or large unexplained variations in shares or in high-level indicators may all indicate underlying data problems.

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(PDF) Life cycle assessment of iron ore mining and

The embodied energy values were 153 MJ/t ore for iron ore. The results showed that loading and hauling made the largest contributions (approximately 50%) to the total GHG emissions from the mining...

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Iron ore - Wikipedia

Ores containing very high quantities of hematite or magnetite (greater than about 60% iron) are known as "natural ore" or "direct shipping ore", meaning they can be fed directly into iron-making blast furnaces.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.

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Process integration in an iron ore upgrading process ...

iron ore operation, vast amounts of electricity are used, mainly in mine operation and mineral processing. In the next year, annual consumption of electricity will have increased from about 1.7 to more than 2 terawatt hours [1]. In recent years, increased attention has been given by the iron ore industry to use energy more efficient.

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The Use of Hydrogen in the Iron and Steel Industry - Energy

Chemical Processes to Reduce Iron Oxide Fe. 3. O. 4 + H. 2 = 3FeO + H. 2. O FeO + H. 2 = Fe + H. 2. O Fe. 3. O. 4 + CO = 3FeO + CO. 2 FeO + CO = Fe + CO. 2. 4. Reduction by CO Reduction by H. 2. THE USE OF HYDROGEN IN THE IRON AND STEEL INDUSTRY. Consumes 500 Nm. 3 /t. iron. of CO. Consumes 500 Nm. 3 /t. iron. of H. 2

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