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  • Blast furnace gas is a by-product of blast furnaces where iron ore is reduced with coke into metallic pig iron The gas has a very low heating value of around 09kWh/Nm 3 which on its own is typically not high enough for combustion in a gas engine...

  • Coke has been the major reductant used in a blast furnace since 1750 The recent boom in the US energy outputs due to shale rock formations has motivated the need to look at natural gas as a partial replacement for coke in a blast furnace During the course of this project the impact of higher natural gas utilization has been studied in detail...

  • Blast furnace gas BFG is a by-product of blast furnaces that is generated when the iron ore is reduced with coke to metallic ironIt has a very low heating value about 93 BTU/cubic foot 35 MJ/m 3 because it consists of about 60 percent nitrogen and 18-20 carbon dioxide which are not flammableThe rest is mostly carbon monoxide which has a fairly low heating value already and some...

  • Operation with various ferrous material or coke and natural gas or lime stone injection tests were performed and pro-duction rate was 39 t/day and coke rate was 622 kg/thm in the 25th campaign NKK constructed a 063 m3 experimental blast furnace in 19678 Experimental blast furnace was...

  • Jul 18 2013 0183 32 Abstract The operation of blast furnaces using natural gas and oxygen enriched blast composite blast technology is being used in many iron and steel companies to reduce the consumption of coke per unit weight of hot metal...

  • energy consumption Natural gas is the most used fuel accounting for nearly half of direct fuel consumption at 322 TBtu while coke and breeze is the next largest fraction of direct fuel at 181 TBtu Blast furnace gas a byproduct fuel of coke and breeze and coke oven gas also a byproduct fuel together consume 90 TBtu for direct fuel us...

  • The use of pulverized coal to replace a portion of the coke also natural gas and fuel oil in the blast furnace has substantial economic benefits A ton of pulverized coal can be substituted for between 75 to 95 tons of coke but the price differential between coke and coal ranges from 2 to 4 times depending on the metallurgical coke and...

  • tuyéres into the raceway of the blast furnace Fu et al 2011 A wide variety of alternative reducing agents such as oil crude tar natural gas and waste plastics is utilized by voestalpine Stahl in Linz Austria hot blast raceway coke ore top gas hot metal slag observed tuyére with injection lances...

  • The concept of the TGR-BF Fig 1 involves many technologies which include i injection of reducing top gas components CO and H2 in shaft and hearth tuyeres ii lowering the consumption of fossil C input due to lower coke rate iii usage of pure oxygen instead of hot air at the hearth tuyere removal of nitrogen from the process and iv...

  • Blast furnace gas is a by-product of blast furnace operations where iron ore is reduced with coke into metallic pig iron The gas has a very low heating value of around 09 kWh/Nm 3 which on its own is not high enough to fuel a gas engine...

  • furnaces use a significant amount of natural gas In the steel-making pro-cess natural gas is injected along with hot blast through tuyeres nozzles into the blast furnac In order to use the COG to displace some of the natural gas USS had to make modifications to a number of systems...

  • The operation of blast furnaces using natural gas and oxygen enriched blast composite blast technology is being used in many iron and steel companies to reduce the consumption of coke per unit...

  • in combination with natural gas NG to fire the coke ovens blast furnace stoves utility boilers and metal working furnac The uti-lization of these by-product fuels reduced the waste gas emissions at the steel mill and the requirements for external fuel sourc Integrated steel production is a four-step process involving...

  • 111 Coke-making process Blast furnace coke is produced by heating coking coal to high temperature in the reducing atmosphere of the coke oven 1 The coal-to-coke transformation is illustrated in Figure 1 4 The coal mix is heated from the oven walls on each side of the coke oven and two plastic layers are developed on each side and converge...

  • Of the total coke consumption for each of these years greater than 99 was by blast furnac Four other sources of energy play significant role in blast furnace operation namely natural gas blast furnace gas fuel oil and coke oven gas Through the next decade at least the energy consumption profile will continue to change significantly...

  • Blast furnace coke rate decreases as natural gas temperature is increased Preheating natural gas from 300 K to 600K can provide a drop of 87 kg/thm in furnace coke consumption 23 Assuming a coke price of 275/ton for a BF operating at 6 500 thm/day 588M will be saved annually Gas Temp K CZ NG T Coke Rate kg/thm Coke Rate Δ change...

  • furnace relative to the corresponding use of metallurgical coke alone Hydrocarbon injection does however provide advantages by introducing hydrogen into the furnace The presence of hydrogen reduces the pressure drop of gas flow Injection of Pulverized Coal and Natural Gas into Blast Furnaces for Iron-making Lance Positioning and Design...

  • Coinjection of coal and natural gas productivity increase in blast furnace INTRODUCTION Supplemental fuels are injected at the tuyere level of blast furnaces to reduce coke consumption and increase productivity These fuels include natural gas coke oven gas oil tar and coal The economic benefits derived from supplemental fuel...

  • 1980s in 12 campaigns by RPA Toulachermet 24 in Russia at blast furnace No 2 Volume 1033 m³ In this all-coke blast furnace concept hot top gas and almost free of CO 2 was blown into the hearth tuyeres together with pure oxygen...

  • blast furnace gas enriched with natural gas is burnt to heat the refractory brickwork up to 1350 176 C an d then compressed air 5 -6 bars 220 176 C is passed in counterblow through the the...

  • Aug 02 2019 0183 32 Blast furnace BF remains the dominant ironmaking process worldwide Central coke charging CCC operation is a promising technology for stabilizing BF operations but it needs reliable and quantified process design and control In this work a multi-fluid BF model is further developed for quantitatively investigating flow-thermal-chemical phenomena of a BF under CCC operation...

  • Process for producing metal from ore in a blast furnace and production plant for same whereby oxygen is heated upstream of the blast furnace to obtain hot oxygen and whereby hot oxygen and coke oven gas are injected into the blast furnace...

  • Blast Furnace or Coke Oven Gas Fired Boilers We offer single-drum and bi-drum type blast furnace gas BFG boilers for the steel industry Both packaged and site-erected options are available...

  • lump coke is charged to the blast furnace The coke oven gas C gas and blast furnace gas B gas generated by the coke ovens and blast furnace are used as fuels in various ironmaking processes sintering coke ovens hot stove power plant or are injected into the blast furnace and consumed as reducing agents after which the sur-...

  • Nov 04 2013 0183 32 He says that plant is using natural gas instead of coke in a small percentage of its blast furnac Coke-making remains an integral part of our steelmaking process...

  • Generally however its calorific value is very low and it requires the addition of natural gas and/or coke oven gas Figure 3 shows a typical control scheme where the blast furnace gas flow rate is inferred by subtracting the natural gas and coke oven gas flow rates from the total mixed gas flow rate...

  • Jul 12 2019 0183 32 Blast Furnace and Process Description - Iron blast furnace is a vertical shaft which is used to melt the iron ore and to produce hot metal by heat exchange and chemical reactionThe burden charge consisting of iron oxide flux and coke and it provides through the throat from the top of the furnace...

  • Let me talk about the use of coke In the blast furnace ironmaking coke has the functions of column skeleton reduction carbon supply and heat supply Column skeleton The coke heap density in the blast furnace charge is the smallest the gap is large and the volume accounts for 35 -50 of the total volume of the charge...

  • Oct 04 2018 0183 32 Coal is the main ingredient used to make coke Iron is produced by inputting coal into a blast furnace However coal cannot be put directly into a blast furnace because of all the harmful by-products that come from that So there is an intermediate process that occurs Coal is converted into coke first Coke is used as fuel in a blast furnace...

  • Mar 31 2020 0183 32 The gas-injection blast furnace BF is a new iron-making technology with an injecting gas instead of traditional pulverized coal injection PCI and recycling of the BF top gas through a gasifier In contrast to traditional all-coke and PCI BFs the coke rate will depend mostly on the heat consumption in a gas-injection BF with abundant...

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