importance of slag formation removal in blast furnace

importance of slag formation removal in blast furnace

  • importance of slag formation removal in blast furnace

    Mineral Reactions and Slag Formation During Reduction certain slag forming properties in the blast furnace Important characteristics of pellets in the blast furnace are their reducibility low temperature disintegration strength after reduction swelling and softening Softening at low temperatures lead to closure of pores and decrease in permeability It is thus desirable to have high softeningFor the smooth operation of the blast furnace, the slag is required to satisfy the following conditions The volume of the slag is to be as low as feasible The slag is to have capacity for the removal of the alkalis, It is to fulfil the requirements for the desulphurisation The composition of the primary slag must be uniformSlag and its Role in Blast Furnace Ironmaking –

  • importance of slag formation removal in blast furnace

    A blast furnace (BF) works with the principle of countercurrent gas to solid heat exchange from Phosphate removal in constructed wetland with rapid cooled The objective of this study was to evaluate adsorption characteristics of phosphate by rapid cooled basic oxygen furnace slag (RCBOFS) through various conditions andBlast furnace slag is a calciumsilicatebased product removed from the top of molten iron during its extraction from ore in a blast furnace Usually, it is rapidly cooled to a glassy state and ground for use in construction materials (Provis et al, 2015)Blast Furnace Slag an overview | ScienceDirect Topics

  • Methodological Aspects of Using Blast Furnace Slag

    Blast furnace (BF) slag is a byproduct of steel plants The objective of this study was to evaluate experimental methods to determine the phosphorus sorption capacity of BF slag The handling of BF slag, before usage and clogging were also considered, as well as estimating the phosphorus retention capacityOne of the main advantages of phosphate removal by using blast furnace slag over the other chemical treatment methods is the abundance of blast furnace slag and its easy availability, which makes it a strong candidate to remove phosphate economicallyRemoval of phosphate from aqueous solution with

  • Use of slag (GBFS) generated in charcoal blast

    The slags from coal blast furnaces (coke) are considered basic, taking into account the need for a large percentage of CaO to remove the present sulfur On the other hand, those produced in charcoal blast furnaces, where the sulfur content is low, have a low CaO/SiO 2 ratio and are usually considered acidic [ 16 ]regions of furnace requires application of additional processes for its removal from BF [24] When removed from the furnace, slag is still in molten form with high temperatureAn Overview of Utilization of Blast Furnace and

  • Experimental simulations of primary slag formation

    Primary slag formation of the blast furnace ferrous burden was experimentally simulated using synthetic MgOAl 2 O 3 CaOSiO 2 slags with FeO, Na 2 O, or FeS additions The combined effect of FeO and Na 2 O or FeS was also examined The melting behaviour and viscosity of five different base slags (sinter, pellet, or lump ore) were investigatedThe reduced admixtures in the blast furnace then react with the added flux in the charge and are bound in the resulting slag In the direct reduction zone, carbonBlast furnace process tecscience

  • extraction of iron from blast furnace slag

    importance of slag formation removal in blast furnace Oct 27, 2011· Ground granulated blast furnace slag (GGBS) can be blended with Portland cement to give a concrete that may have technical or price advantages, but in some countries there are limits on the alumina content (which may in turn restrict the use of iron ores from parts of theBlast furnace slag is an industrial byproduct that derives from the separation of iron from ore This material has proved to have a high P sorption capacity as has been shown earlier in batch and column experiments but also in field investigations ( Yamada et al, 1986 , Mann and Bavor, 1993 , Johansson, 1999a , Johansson, 1999b , SakadevanPhosphate removal using blast furnace slags and

  • Methodological Aspects of Using Blast Furnace Slag

    Blast furnace (BF) slag is a byproduct of steel plants The objective of this study was to evaluate experimental methods to determine the phosphorus sorption capacity of BF slag The handling of BF slag, before usage and clogging were also considered, as well as estimating the phosphorus retention capacitymogeneous slag formation, compared with the top charged lumpy slag formers, which can result in locally very basic A higher output of alkali in the blast furnace slag will reduce the circulating load of alkali in the furnace, leading to less scaffolding etc An improved alkali removal in the slag phase can also be utilised to increaseThe Use of Coated Pellets in Optimising the Blast Furnace

  • Optimisation of the slag formation in a blast furnace

    Abstract This work is based on experiences from industrial blast furnaces Process irregularities when testing selffluxed pellets Process disturbances when charging increased proportions of coarse pellets Laboratory tests to evaluate the effect of basic fluxes on the slag formation in the bosh and in the raceway have been carried outBlast Furnace slag can be used as a highvalue Partial replacement to conventional Portland cement Most of the modern steel plants now completely granulate the BF slag and use in cement makingUtilization of Granulated Blast Furnace Slag in the

  • Sulphur removal in ironmaking and oxygen steelmaking

    Sulphur removal in ironmaking and oxygen the blast furnace (BF), during hot metal (HM) pretreatment, in the converter and during the secondary metallurgy (SM) treatment For sulphur removal a low oxygen activity and a basic slag are required In the BF typically 90% of the sulphur is removed; still,the HM containsExtraction of Metals Extraction of Iron Chemistry of the blast furnace () Limestone is calcium carbonate (CaCO 3) and it is added to the blast furnace to remove the impurities in the iron ore Calcium carbonate is decomposed by heat in the furnace to give calcium oxide and carbon dioxide This is called thermal decomposition (see examples of other carbonates)GCSE CHEMISTRY Extraction of Iron in the Blast

  • ALKALINE CARBONATES IN BLAST FURNACE PROCESS

    tasks of blast furnace slag is removing harmful elements The total alkali content in the output raw materials is naturally reduced due to settling of these elements in the blast furnace lining It takes place mainly in the upper parts of blast furnace, where the hot gases are cooling Table 1 Measured alkali contents in input raw materialsThe molten pig iron finally collects in the hearth of the blast furnace together with the slag, which is also liquid Due to the higher density of the pig iron, the pig iron can be cut off at the lowest point of the blast furnace (called tapping) It has a high carbonBlast furnace process tecscience

  • Methodological Aspects of Using Blast Furnace Slag

    Blast furnace (BF) slag is a byproduct of steel plants The objective of this study was to evaluate experimental methods to determine the phosphorus sorption capacity of BF slag The handling of BF slag, before usage and clogging were also considered, as well as estimating the phosphorus retention capacityFig 1 A sketch showing Blast Furnace Process Fig 2 Cohesive Zone Fig 3 General schematic of blast furnace operation and blast furnace slag production Fig 4 Schematic representation of the silicate tetrahedron in crystalline and molten silica The oxygen and silicon atoms are shown white and black respectivelyAN ATTEMPT AT OPTIMIZING THE FLOW

  • The Use of Coated Pellets in Optimising the Blast Furnace

    mogeneous slag formation, compared with the top charged lumpy slag formers, which can result in locally very basic A higher output of alkali in the blast furnace slag will reduce the circulating load of alkali in the furnace, leading to less scaffolding etc An improved alkali removal in the slag phase can also be utilised to increaseExtraction of Metals Extraction of Iron Chemistry of the blast furnace () Limestone is calcium carbonate (CaCO 3) and it is added to the blast furnace to remove the impurities in the iron ore Calcium carbonate is decomposed by heat in the furnace to give calcium oxide and carbon dioxide This is called thermal decomposition (see examples of other carbonates)GCSE CHEMISTRY Extraction of Iron in the Blast

  • Sulphur removal in ironmaking and oxygen steelmaking

    Sulphur removal in ironmaking and oxygen the blast furnace (BF), during hot metal (HM) pretreatment, in the converter and during the secondary metallurgy (SM) treatment For sulphur removal a low oxygen activity and a basic slag are required In the BF typically 90% of the sulphur is removed; still,the HM containstasks of blast furnace slag is removing harmful elements The total alkali content in the output raw materials is naturally reduced due to settling of these elements in the blast furnace lining It takes place mainly in the upper parts of blast furnace, where the hot gases are cooling Table 1 Measured alkali contents in input raw materialsALKALINE CARBONATES IN BLAST FURNACE PROCESS

  • Blast Furnace Slag of a Ferrosilicon Firm in Aswan

    The adsorption potential of the blast furnace slag of a ferrosilicon firm in Aswan Governorate, Egypt, to decolorize aqueous solutions of 3‐methyl‐1‐phenylpyrazol‐5‐one 4[2] merocyanine dye (1) was investigated at room temperatureThe influence of the solution pH, the quantity of adsorbent, the initial concentration of 1, and the applied contact time were studied with the batchDuring the production of pig iron in a blast furnace, a Zn and Pbcontaining sludge is generated in the air pollution control system This toxic waste can be landfilled after dewatering and pretreatment, which is very costly The sludge particles contain large amounts of Fe and C that could be recycled in the furnace However, the Zn content of the sludge is high, and the Zn input to theZinc and Lead Removal from Blast Furnace Sludge

  • Understanding Ironmaking in Blast Furnace and

    Understanding Ironmaking in Blast Furnace and Dissection studies in Japan The blast furnace (BF) ironmaking is the most viable means of producing hot metal (HM) mainly due to its well established and proven performance, flexible raw materialISIJ International, Vol 32 (1992) No 4, pp 481488 Prediction of the Blast Furnace Process by a Mathematical Model XuegongBl Krister TORSSELL1)and Olle WIJK2) Formerly Department of Process Metallurgy, The Royal Institute of Technology, Nowat Division of lronmaking Wuhan lron and Steel University, Box 123, WuhanHubei People's Republic of China 1)Formerly Department ofPrediction of the Blast Furnace Process by Mathematical

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