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·ing coke consumption increasing productivity reduc ing slag yield facilitating pulverizedcoal injection Keywords sinter pellets local sinter residual carbon DOI /S0967091215040154 STEEL IN TRANSLATION Vol 45 No 4 2015 IMPROVED IRONORE SINTER FOR BLAST FURNACES 271
The main raw material of blast furnace is sinter even in the Kakogawa Works which has a set of sinter and pellet plants the blending ratio of sinter in blast furnace raw mate rials accounts for 40 to 50 mass% Sinter plant use mainly iron ore with a
·These fuel consumption numbers increase by 60 M cal per ton when producing fluxed pellets Power consumption from balling to pellet load out is around 23 kWh per ton The grate kiln system is easy to control and the product pellets have a uniform quality It can also be scaled up to a fairly large degree
·Iron ore/sinter/pellets coke and limestone are used as raw materials for blast furnace Impure liquid iron is produced in a blast furnace from reduction of iron ore by carbon of coke of coke should be such that it gives minimum of operational difficulties and maximum of production rate at minimum of coke consumption The value of coke as
Coke consumption min 39 kg t −1 sinter max 54 kg t −1 sinter is one important factor as nowadays is the main combustible for the sintering process Sinter and pellets are loaded in the blast furnace together but this causes several problems associated to two aspects
·These materials and coke from conveyor belts or rail hoppers are transferred to the stockhouse Each type of material ore pellet sinter coke limestone etc is dumped into separate bins The raw materials are weighed by discharging from bins and transported to the furnace top by a belt conveyor or skip cars
·A blast furnace BF is the dominant process for making iron in the world The BF is charged with metallurgical coke and iron burden materials including iron ore pellets sinter and lump ore While descending in the BF the charge materials reduce The iron‐bearing materials should reduce fast and remain in the solid form until as high a temperature as
·Besides fuels and reductant like BF coke nut coke and pulverized coal the BF needs for the production of hot metal HM i iron bearing raw materials like sinter pellet and calibrated lump ore also known as sized iron ore ii fluxing materials like lime stone dolomite and quartzite and iii miscellaneous materials also known as
·In conventional ironmaking practice ferrous burden iron ore sinter and pellets and regular coke are charged in alternate layers For consistent blast furnace operation the desired size range of the regular coke is 40 80 mm Strict quality and size demand for regular coke layer results in the generation of undersize coke size < 40
·The sinter plant that converts the iron ore fines into a desirable blast furnace feed offers an avenue for recycling wastes One of the several wastes that are produced at an iron and steel plant is the undersized pellet fines which cannot be directly used in iron making The present study evaluated the influence of these pellet fines on the sintering process 5
Sinter pellet and lump ore are typical ferrous raw materials for BFs worldwide While the burden composition varies significantly from BF to BF sinter is the predominant ferrous material for BFs particularly in countries in East Asia Coke consumption is considered the primary heat reaction of the sintering process The positive enthalpy
·The technical characteristics of BF No 1 are as follows The average grade of pellet is 64% while the average grade of sinter is 56% According to the material consumption of the enterprise tons pellet or tons sinter will be consumed to produce ton pig iron so the material consumption is expressed as follows
·The conventional top charged burden into the blast furnace including sinter pellets and metallurgical coke has reached a high level of quality that makes further improvement extremely hard Although the blast furnace is nowadays working very close to the ideal conditions there is still a demand to enlarge its adaptability to reuse the in
·Reduction of Iron Ore Pellets Sinter and Lump Ore under Simulated Blast Furnace Conditions Anne Heikkilä Mikko Iljana Hauke Bartusch and Timo Fabritius BF is the most common process for hot metal production in the world The BF is charged with metallurgical coke and iron bearing materials separately which leads to a lay ered
In FY 20 India s steel production was 109 MT and it is the second largest steel producer on the planet after China India s per capita consumption of steel was around 75 kg which has risen
·Iron ore/sinter/pellets coke and limestone are used as raw materials for blast furnace Impure liquid iron is produced in a blast furnace from reduction of iron ore by carbon of coke of coke should be such that it gives minimum of operational difficulties and maximum of production rate at minimum of coke consumption The value of coke as
·The smelting process of blast furnace is carried out in the shaft furnace of a closed countercurrent reactor and heat exchanger The complex physical changes and chemical reactions are completed in the process of the countercurrent movement of the charge and gas in which the raw materials containing iron oxide sinter pellets etc coke slag flux limestone
·The sinter mix consisted of micro pellets fluxes coke breeze and return sinter For each test all raw materials including moisture were mixed in drum mixer and the mixed charge was transferred into a pot grate tube up to a height of 500 mm bed 1 mm grate spacing was maintained in the pot to retain finer particles without hearth layer
·Prepared iron ore lump ore pellets sinter coke and limestone are charged into the top of the BF A hot air blast commonly enriched with oxygen and often an The conceptual system for BF optimization from an energy consumption point of view and consequent GHG emissions reduction is shown in Fig Although the BF is an energy
·In recent years the technical and economic indices of BF in China have been continuously improved and made steady progress The BF average productivity is stable at above t/ m 3 ·d ranking in the international leading The BF fuel ratio enters the platform stage the coke rate and PCI rate do not change much and the carbon consumption does not
Iron ore coke sinter and limestone are the primary raw materials required to be fed into the blast furnace Sintering can be considered as a traditional thermal agglomeration technique Sinter is used as a feed material of the blast furnace to enhance productivity and
This innovative technique help improving 30% microfines utilization in sinter bed reduce coke breeze/energy consumption reduce overall basicity of sinter and decrease flux composition It was observed that melting happens in a significant quantity of pellets When coke in sinter mix was reduced the majority of the pellets became hollow or
·The experimentation allowing comparison of manganese ore fines pellet sintering and traditional sintering of manganese ore fines in terms of sintering performance are studied The results show that compared with traditional sintering the pellet sintering process can significantly reduce the coke level while ensuring the quality of sinter Pellet sintering required
