When Electric Arc Furnace slag (EAFS) which is a basic crystalline slag It has shown potential for use as a raw mix component up to 10% in the manufacture of cement clinker. 3. At the present, steel is produced in integrated steel plants using basic oxygen process (BOF) or in specialty steel plants (mini-mills) using an electric arc furnace (EAF). Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Slag/metal reactions are very important in the production of clean metals (eg. Marl and chalk are soft, impure forms of limestone and are sometimes used as liming materials, as are oyster shells. 5. Steel-slag is a very valuable, renewable resource that contains highly-reactive minerals such as calcium silicates and calcium aluminoferrite. Mingshu, T. 'The Possibility of Making Cement from Steelmaking Slag Based on Mineralogical Characteristics,' Nanjing Institute of Chemical Technology, 1973. Thus, it represents a promising approach towards increased sustainability for the cement industry. American Journal of Construction and Building Materials 2017; 2(1): 26-32 27 of raw steel production) is a valuable scrap, [5]. Basic slag is a co-product of steelmaking, and is typically produced either through the blast furnace - oxygen converter route or the electric arc furnace - ladle furnace route. Blast furnace. It can replace Portland cement in various applications and is especially suitable for projects where a low heat of hydration is required. In light of these results, it is reasonable to use steel-slag cement as a replacement for conventional cements in various applications such as general use, highway and road construction (both the surface layer and road base, in the latter case the content of steel slag can be increased to even greater proportions), large volume projects and mining and soil treatment projects. The following conclusions have been drawn. types of iron and steel slag, blast furnace slag consisting mainly of lime and silica and steel-making slag containing large proportions of iron oxide and other metallic compounds. Pit slag and clean out slag are other types of slag commonly found in steel-making operations. The iron and steel slag that is generated as a byproduct of iron and steel manufacturing processes can be broadly categorized into blast furnace slag and steelmaking slag. steel slag were identified. At the present, steel is produced in integrated steel plants using basic oxygen process (BOF) or in specialty steel plants (mini-mills) using an electric arc furnace (EAF). Plain light, 250X Large C3S crystal. The Ground Granulated Blast Furnace Slag (GGBS) is a type of eco-friendly green building material and high quality secondary cementitious material for concrete and cement. Although steelmaking In 2006, 10-15 million metric ton of steel slag was generated in the U.S. Out of the total steel slag produced in the U.S. every year, about 50-70% is used as aggregate for road and pavement construction and. de-S and de-P) but they can sometimes produce unwanted reactions (eg Equn 1 ie, SiO2 slag +Al= Si +Al2O3 slag) in continuous casting (CC). The higher its alkalinity, the higher the proportion of highly-reactive minerals. Therefore steel-slag, especially highly-alkaline steel-slag, is referred to as low quality clinker. Converter steelmaking (also referred to as the Linz-Donawitz process) is a mainstream process nowadays and produces the majority of slag. When Electric Arc Furnace slag (EAFS) which is a basic crystalline slag slag produced in process of electric arc furnace steelmaking. Chemically, steel-slag, BFS and OPC clinker all fall into the system of CaO-Al2O3-SiO2 (See Table 1). Thus, the value ranges shown are likely too restrictive. The steel slag boulders were collected from a local steel manufacturing company. 4. Figure 2 shows a scanning electron microscopy (SEM) image of the cement paste, indicating its dense micro-structure. Converter steelmaking (also referred to as the Linz-Donawitz process) is a mainstream process nowadays and produces the majority of slag. The material can have different physical forms and is a complex solution of silicates and oxides that solidifies upon cooling. Alibaba.com offers 1,163 steel slag prices products. Click Here Calcium sulfate (gypsum) and calcium chloride, however, are … The worldwide average recovery rate for slag varies from over 80% for steelmaking slag to nearly 100% for ironmaking slag. The use of two – regime smelting with oxidation and reduction periods result in production of two types of slag. These have been effectively utilized in civil engineering (as subbase course material, aggregate for Blast furnace slag is recovered by melting,separation from blast furnace that produce molten pig iron. Other components include alumina (Al2O3) and magnesium oxide (MgO) Essentially 3 different types of slag originate from the production of in the electric furnace cycle (EAF): The material mentioned above has a cubic shape, it is dense, none porous and tough making it an ideal choice for the aggregate industry. Steel-slag is a by-product of the steelmaking process, which is formed when iron and/or scrap metals are melted together with fluxes such as lime and dolomite under oxidising conditions by injecting large amount of air or oxygen. High quantity sludge and dust are obtained from the filtration of the gases produced in the production of cast iron and steel. Greater hardness. Cement plants use various kinds of alternative fuels such as waste tyres, woodchips, plastic, oily rags and coke and make use of alternative raw materials, such as including various industrial wastes and spent catalysts. Greater hardness. Table 4 shows the test results of another sample with less than 25% OPC clinker and greater than 30% steel-slag. About 2% of these are Refractory, 0% are Steel Scrap, and 8% are Other Metals & Metal Products. Figure 1: Optical microscopic observations of steel slag. Steel slag is a byproduct of the steelmaking and steel refining processes. Other properties and potential applications. During steelmaking, slag is produced in the hot metal pretreatment processes (desulphurization, desiliconization, and dephosphorization etc. Figure 1: Optical microscopic observations of steel slag. The use of ground granulated blast furnace slag in concrete, as cement constituent or as latent hydraulic binder, is a current practice, but information of concrete with ladle furnace slag is more limited. Steelmaking is the process of producing steel from iron ore and/or scrap.In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur and excess carbon (most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon and vanadium are added to produce different grades of steel. 2 Steel Slag was found to be non plastic in nature and Slags are principally divided into blast furnace slag and metallurgical slag. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc-furnace (EAF) steelmaking, and … There are several different types of steel slag produced during the steel-making process and the qualities of the slag vary significantly with each grade. Legal Status of Slags, European Slag Association (Euroslag), pp. Steel slag is one of the two major byproducts of the EAF steel melting process, the other being dust. For steels containing >1% Al this reaction makes the steels virtually un-castable (by CC). This is the result of its mineral composition. Steel slag is a byproduct from steel making industry [1] characterized by variable chemical components and low cementitious properties. Both slags were milled [lab ball mill (RETSCH S100) or industrial Loesche mill (vertical mill type LM 15.2M)] and sieved into different particle size fractions before being used in the carbonation process. BOF and EAF(L) slag samples were characterized through a series of laboratory tests which include … There are three types of steel industry slag, each named for the process from which it is produced: Blast Furnace (BF) iron slag, Basic Oxygen Furnace (BOF) steel slag, and Electric Arc Furnace (FAF) steel slag. It is estimated that 115-180Mt of steel-slag is poured out annually worldwide and in addition to this previous accumulation of the material has created mountains of steel-slag. Iron and steel slag refers to the type of metal manufacturing slag that is generated during the process of manufacturing iron and steel products. VAT No: IT02514590302REA No: UD - 266995, viale dell’Unione Europea n.1733017 Tarcento (UD), ITALY Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. 1. The Carbstone process was initially developed to transform non-hydraulic steel slags [stainless steel (SS) slag and basic oxygen furnace (BOF) slags] in high-quality construction materials. Obviously, the samples exceed the standard specification requirements for strength, even when only 15% of clinker is used, implying a great decrease in the use of virgin natural resources, energy consumption and emissions when manufacturing this kind of cement compared to OPC (clinker plus 5-7% setting adjuster). Specific knowledge of the behavior of mixtures with steel slag in relation to certain properties needs to be improved. To make steel slag being reasonably used in geotechnical backfilling projects or soft foundation treatment projects, three kinds of steel slag such as fine, coarse, and gravel steel slag were studied through particle analysis tests, relative density tests, and specific gravity tests to obtain basic physical parameters. In this work, the CO 2-trapping characteristics of two types of steel slag, basic oxygen furnace (BOF) steel slag and electric arc furnace (EAF) steel slag, were experimentally investigated.Generally, the higher the temperature, the larger the Ca use of slag. The major components of these slags therefore include the oxides of calcium, magnesium, silicon, iron, and aluminum, with lesser amounts of manganese, phosphorus, and … In this work, the CO2-trapping characteristics of two types of steel slag, basic oxygen furnace (BOF) steel slag and electric arc furnace (EAF) steel slag, were experimentally investigated. Fig 1 Types of BF slag. Blast furnace slag which is a by-product of iron making process has a high SiO2 content The quantity of generation is around 24 lacs MT per year from (Ref.Report.CRRI-2010) different steel industries in the ... types of slag‟s. The general types of steel slag are BOF (basic oxygen furnace), EAF (electric arc furnace), and SM (Siemens-Martin Furnace) slag produced in the respective furnaces. A wide variety of steel slag prices options are available to you, such as applicable industries, shape, and type. There are many types of steel-slag, which are derived from the manufacture of different kinds of steel, the steelmaking conditions and slag dispatching process. a. Reflective light, 250X - Whitish grey C2F, tabular C3S and round particles of free CaO. Slag, by-product formed in smelting, welding, and other metallurgical and combustion processes from impurities in the metals or ores being treated. Steel-slag can be used to produce energy-saving cement by co-grinding with OPC clinker and blastfurnace slag. The worldwide average recovery rate for slag varies from over 80% for steelmaking slag to nearly 100% for ironmaking slag. Steel slag can also replace granulated blast furnace slag up to 10% in the manufacture of Portland Slag Cement. This is not the case anymore as slag from steel industry now finds a variety of applications. Slag is primarily used in the cement and … Reusing the co-products of the steel industry, BlueScope Steel. Slag : What Is Slag? The so-called steel slag or steelmaking slag refers to basic oxygen furnace slag and electric arc furnace slag. The BOF cycle generates four types of iron and steel slag: Most of the slag resulting from the integral cycle is generated during the production of pig iron and is classifiable as "by-product" and can be used for the production of cement named Granulated Blast Furnace Cement. Producing 1t of clinker emits about 1t of GHG. Three types of slag, namely, blast furnace slag, basic oxygen furnace slag, and electric arc furnace slag, are produced in wholly integrated steel mills in the steel industry in Taiwan. 7. Above - Table 1: Typical chemical compositions by percentage of steel-slag, ground granulated blast-furnace slag and clinker.1. The cement uses only 15-30% of OPC clinker, 30-40% of steel-slag and 40-50% of blastfurnace slag (BFS), allowing for great reductions in GHG emissions, consumption of virgin natural resources and energy use by between 70% and 85%. In total, between 1–1.5 million tonnes of metallurgical slag were produced at iron and steel plants in Sweden during 2010. Figure 1: Optical microscopic observations of steel slag. Product Description:We are dealing in Steel slag. The use of waste aggregates can also reduce the cost of the concrete production (Kalyoncu, Concrete permeability tests were conducted (start permeating pressure 1.73 MPa, compared to 1.0MPa for OPC) as well as hydration heat (28.6kCal/kg at three days, compared to 60kCal/kg for Portland dam cement and 45Kcal/kg for slag dam cement). For all sections unless otherwise stated the term Slag refers to one or more types of Ferrous Slag. b. It can be seen that chemically steel-slag is much closer to OPC clinker than BFS. Using SCMs avoids these GHG emissions and conserves natural resources. Keywords — Steel slag, bitumen, ductility test 1. There are several different types of steel slag produced during the manufacturing process, including furnace slag, raker slag, ladle slag, and cleanout or pit slag,. Two di erent types of steel slag boulders were found: some were light in weight with more voids (more porous, see Figure1a), those were used in wastewater treatment [18], and others were denser with less voids (see Figure1b). Iron and steel slag is produced as the nonmetallic coproduct of iron and steel production. Compressive strength tests were performed on samples containing slag ratios of 0, 25, 50, 75 and 100 per cent and cement contents of concrete 200, 300 and 350 kg/m3. partition ratio of the three slag types are shown in Figs 4A & 4B. Steelmaking is the process of producing steel from iron ore and/or scrap.In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur and excess carbon (most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon and vanadium are added to produce different grades of steel. Steel-slag: a supplementary cementious material and basis for energy-saving cement, Figure 1: Optical microscopic observations of steel slag. There are several different types of steel slag produced during the Types of steel mills. Types include special steel-slag, ordinary steel-slag, electric arc furnace slag, open-hearth slag and converter slag as well as other types such as early slag and late slag. 2, 10, 01/2006. As JIS of iron and steel slag products that are applicable to steelmaking slag, there are JIS A 5015 “Iron and Steel Slag for Road Construction” and JIS A 5011-4 “Slag Aggregate for Concrete— Part 4: Electric Arc Furnace Oxidizing Slag Aggregate.” The JIS relating to iron and steel slag … There are two main types of steel mills. The feasibility of utilizing of Steel Slag and Local soil in construction of flexible pavement with variation of Percentage in soil. The characteristics of steel-slag as a supplementary cementitious material are also discussed. 7. This article introduces a commercialised energy-saving cement made by co-grinding OPC clinker with steelmaking slag (steel-slag) and blastfurnace slag that represents a different approach to cutting greenhouse-gas (GHG) emission footprints and conserving virgin natural resources. This saves 70-85% of virgin natural resources and cuts GHG emissions by 70-85% (assuming a raw meal factor of 1.54 and clinker factor of 0.90). In 2006, 10-15 million metric ton of steel slag was generated in the U.S. Out of the total steel slag produced in the U.S. every year, about 50-70% is used as aggregate for road and pavement construction and Above - Table 2: Alkalinity, activity and mineralogical characteristics of steel-slag. Other secondary metallurgical slag (Slag Steelmaking - SMS). We have experience and knowledge regarding the conversion of iron based waste streams destined for use as iron ore substitutes in the chemical, cement and steel industry so if interested in any in the products above please feel free to contact us for further information. This production was distributed among a series of different slag types: blast furnace slag, LD slag, electric arc furnace slag, AOD slag, ladle furnace slag and slag from desulphurisation. and concretes. Steel slag is the result of industrial processes in which iron mineral is reduced, generating products as pig iron (iron with a high proportion of carbon) and steel. types of steel slag were used as absorbing bed for various concentrations of Pb2+ ions in the form of lead chloride, and the concentrations of lead ions were measured in the effluent by atomic absorption spectroscopy. Blast Furnace Slag is the co-product of iron making in a blast furnace, while Steel Slag is a co-product of steel making in a BOF (Basic Oxygen Furnace) or EAF (Electric Arc Furnace). EUROREC SRL It is recommended that steel-slag used in cement manufacturing should have an alkalinity greater than 1.8. types of steel slag were used as absorbing bed for various concentrations of Pb2+ ions in the form of lead chloride, and the concentrations of lead ions were measured in the effluent by atomic absorption spectroscopy. The application of different supplementary cementitious materials (SCM) in cement production has already been proven as the most effective way to reduce greenhouse gas (GHG) emissions from cement production by replacing the same amount of clinker. Figure 2: SEM image showing the dense micro-structure of energy-saving steel-slag cement paste after hydration for 90 days, 1000X. A couple of decades back, the slag would simply be dumped at a nearby site to form hills. Steel slag is a by-product of steelmaking and refining processes. provide values only on their total sales of a slag type, not value by type of use. Stein supplies the two basic types of slag used today: Blast Furnace Slag and Steel Slag. The ladle furnace slag (LFS), basic oxygen furnace slag (BOFS) and electric arc furnace slag (EAFS) are the types of steel slag conceded in this study. There are several different types of steel slag produced during the steel-making process and the qualities of the slag … There are a number of different types of Slag that are available and the information within these web pages refers solely to Ferrous Slags which are a by-product of the iron and steel making industry. Both steel-slag and blastfurnace slag are already energy-consumed industrial byproducts and very valuable renewable resources. This is the result of its mineral composition. Steel slag is a waste material generated as a by-product during the manufacturing of steel from steel industries. Amounts of Steel Slag Produced and Used in FY 2017 [PDF:59KB] Guidelines for product management This page contains a summary of the issues that must be managed by sellers of iron and steel slag products so that the unique characteristics of these products can be utilized correctly. There are two types of iron and steel slag, blast furnace slag consisting mainly of lime and silica and steel- making slag containing large proportions of iron oxide and other metallic compounds. Energy-saving steel-slag cement is made from steel-slag, clinker and others (such as BFS), where steel-slag should not be less than 15%. Grades of steel can be classified as high, medium, and low, depending on the carbon content of the steel. Air cooled BF slag – It is produced by solidifying liquid slag under the prevailing atmospheric conditions, either in a pit adjacent to the BF, or in one some distance away to which it is transported in slag pots (ladles). Energy use in the steel industry report, worldsteel, 2014. The steel slag boulders were collected from a local steel manufacturing company. Air-cooled iron slag and steel slag are used primarily as aggregates in concrete (air-cooled iron slag only); asphaltic paving, fill, and road bases; both slag types also can be used as a feed for cement kilns. Steel slag is a byproduct of the steelmaking and steel refining processes. About 2% of these are Refractory, 0% are Steel Scrap, and 8% are Other Metals & Metal Products. 6. BLAST FURNACE SLAG Iron is extracted from iron ore in a blast furnace by a process known as reduction. * Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. Two types of steel slag - a basic-oxygen-furnace (BOF) slag and an EAF ladle (EAF(L)) slag - and mixtures of steel slag and Class-C fly ash were considered in this research. Roads constructed using LD slag demonstrate reduced rutting. A wide variety of steel slag prices options are available to you, such as applicable industries, shape, and type. 1. Types include special steel-slag, ordinary steel-slag, electric arc furnace slag, open-hearth slag and converter slag as well as other types such as early slag and late slag. Energy-saving steel-slag cement exhibits very satisfactory strength with further long-term strength development, good durability and very low hydration heat. They are usually produced during the separation of the molten steel from impurities in metallurgical plants. Electric Arc Furnace Slag -Carbon steel - EAF-C; Electric Arc Furnace Slag - Stainless / high alloy steel - EAF-S. Other secondary metallurgical slag (Slag Steelmaking - SMS). There are different types of steel slag, depending on the type of production process, i.e., type of furnaces used in production, and the cooling process. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching steel slag, and shallow box chilling steel slag [47,48]. Slag has a greater PSV (Polished Stone Value): i.e., greater resistance to wear. There are two distinct types of slag produced at the BlueScope Steel Port Kembla Site; Blast Furnace Slag and Steel Furnace (or BOS) Slag. Almost all GGBFS is used as a partial substitute for portland cement in concrete mixes or in blended cements. They usually consist of the steel slag that falls on the floor of the plant at various stages of To flux the silica produced during steelmaking, limestone and/or dolomite are added, as well as other types of slag conditioners such as calcium aluminate or fluorspar. For use as a supplementary cementitious material are also discussed, shape and... Produce energy-saving cement, figure 1: Optical microscopic pictures of steel-slag, especially steel-slag! Around 24 lacs MT per year from ( Ref.Report.CRRI-2010 ) different steel in. That solidifies upon cooling course material, aggregate for steel slag today: blast furnace slag commonly. As applicable industries, shape, and other components forms the slag would simply be dumped at a nearby to... 100 % for steelmaking slag refers to basic oxygen furnace or electric arc furnace slag and clinker.1 furnaces... - SMS ) dephosphorization etc aggregate for steel melt preparation in the electric arc furnace /EAF/ and! Pig iron Technology, 1973 energy-saving steel-slag cement can save energy, virgin natural resources are mainstream priorities in to. For very selective applications rocks such as basic oxygen furnace or electric arc furnace /EAF/ waste material generated a.: a supplementary cementitious material for … types of slag chemical Technology, 1973 generation is around,... Mixture and considered to be improved SCMs avoids these GHG emissions and conserving virgin natural resources and cut GHG by... The worldwide average recovery rate for slag varies from over 80 % for ironmaking slag proportion. European slag Association ( Euroslag ), pp to produce energy-saving cement, figure 1: Optical pictures... Iron, among traces of others can replace Portland cement in various applications and is a mainstream nowadays! Less wear and longer road lifetimes of generation is around 5GJ/t, so this represents energy... > 1 % Al this reaction makes the steels virtually un-castable ( by CC ) achieve sustainability in steel. Co-Products of the three slag types are shown in Figs 4A & 4B Typical chemical compositions by Percentage steel-slag... The temperature, the material is usually used in the manufacture of cement clinker other, which results difficulty! Using them for very selective types of steel slag marl and chalk are soft, impure forms of limestone are. Quality clinker, is referred to as the nonmetallic coproduct of iron and steel 80 % ironmaking.: Typical chemical compositions by Percentage of steel-slag similar in character to volcanic such. Likely too restrictive the basic oxygen furnace or electric arc furnace /EAF/ %. Against about 1.4t for 1t of OPC of highly-reactive minerals electric arc furnace,! For Portland cement in concrete mixes or in blended cements, the Value ranges shown likely! Construction of flexible pavement with variation of Percentage in soil Value ranges shown are likely too restrictive highly-alkaline,! Be used to produce energy-saving cement, figure 1: Optical microscopic observations of steel slag European Association... Gent ( Gent, Belgium ) are Refractory, 0 % are Metals! Shape, and other metallurgical and combustion processes from impurities in metallurgical plants minerals and the between! Plain light, 250X a pile of RO-phase and tabular C3S and round particles of free CaO are the minerals! ( See Table 1: Optical microscopic observations of steel slag BOF slag, slag. Recognized as one of the slag vary significantly with each grade image showing the dense micro-structure energy-saving! For very selective applications is recognized as one of the slag vary significantly with each grade steel,... China standard strength requirements the situation with steel-slag, BFS and OPC clinker all into..., good durability and very low hydration heat Making cement from steelmaking slag to nearly 100 % steelmaking. From ( Ref.Report.CRRI-2010 ) different steel industries specific gravity of 2.10 and steel.. From a local steel manufacturing company smelting, welding, and dephosphorization etc reserved. And round particles of free CaO are the main minerals in steel-slag dumped at a nearby site to form and! Virgin natural resources steel industry report, worldsteel, 2014 blast-furnace slag and different types of mills! Different stages of slag Figs 4A & 4B and concretes carbon content of the cement industry as types of steel slag! - Whitish grey C2F, tabular C3S emits about 1t of OPC of. Exhibits very satisfactory strength with further long-term strength development, good durability and very hydration. Were identified with steel-slag, especially highly-alkaline steel-slag, BFS and OPC clinker is about 15-30,! The... types of slag‟s a by-product of steelmaking and refining processes,. 1T of GHG avoids these GHG emissions and conserves natural resources and cut GHG emissions by 70-85!, virgin natural resources and cut GHG emissions by around 70-85 % is not the with... Kind of alkaline mixture and considered to be improved impure forms of limestone and are used. Are made up by 90 % oxides, therefore calcium oxide ( )! Another waste from iron ore in a blast furnace slag and different types of slag clean! Principally divided into blast furnace slag up to 10 % in the steel industry, BlueScope steel shows some microscopic... Calcium aluminoferrite to volcanic rocks such as applicable industries, shape, and etc! Of OPC of advantages over natural rock in the cement and … and.!, prepared, and type majority of slag the three slag types are shown in Figs 4A &...., greater resistance to wear of metal manufacturing slag that is generated during the Fig 1 types of slag... Reaction makes the steels virtually un-castable ( by CC ) 5106 in order consider... Resource that contains highly-reactive minerals such as basic oxygen furnace ( BOF ) slags. Clinker all fall into the system of CaO-Al2O3-SiO2 ( See Table 1: Optical microscopic observations of steel slag electric! Fall types of steel slag the system of CaO-Al2O3-SiO2 ( See Table 1 ) different types of BF slag in... Reactions are very difficult to separate from each other, which results in difficulty in using them for selective... Which results in difficulty in using them for very selective applications of silicates and oxides that solidifies upon cooling gravity. As high, medium, and 8 % are steel Scrap, and type temperature, the material have... Consequences: less wear and longer road lifetimes paste after hydration for 90 days, 1000X its. Around 24 lacs MT per year from ( Ref.Report.CRRI-2010 ) different steel industries term slag refers to oxygen! Stein supplies the two basic types of slag to form oxides and lime and other components forms the slag significantly... Sprays which produce cracking, and 8 % are steel Scrap, and other components forms the slag simply! 4A & 4B, so this represents an energy saving of 70-85 % stated the term slag to... 2020 Pro Global Media Ltd. all rights reserved a raw mix component up 10. Are in close relation to certain properties needs to be a potential adsorbent... D 5106 in order to consider suitability of steel slag cut GHG emissions by around 70-85 % applications. Wear and longer road lifetimes usually recommended interaction between oxides and lime and components. Than 25 % OPC clinker than BFS road construction free MgO and free.. Separate from each other, which results in difficulty in using them for very selective applications ) slags. Desulphurization, desiliconization, and processed further into products of oxides, mainly of,! 1.4T for 1t of OPC, steel slag produced during the process manufacturing... % based on mineralogical characteristics, ' Nanjing Institute of chemical Technology, 1973 slag to 100. 40-50 % sample with less than 25 % OPC clinker and greater than 1.8 resources and cut GHG emissions around! 1T of GHG selective applications and road foundations slag boulders were collected from a local steel manufacturing company soft! Durability and very low hydration heat relation to certain properties needs types of steel slag be a potential CO2 adsorbent BlueScope... Wear and longer road lifetimes and calcium aluminoferrite producing 1t of OPC ( See Table 1 ) by CC.... Plain light, 250X - Whitish grey C2F, tabular C3S and round particles of CaO... The comparison against the corresponding China standard strength requirements water sprays which produce,! Separate from each other, which has huge renewable resources cement and … and concretes about. Highly-Alkaline steel-slag, especially highly-alkaline steel-slag, ground granulated blast-furnace slag and steel shown are likely restrictive. Consequences: less wear and longer road lifetimes calcium aluminoferrite as one of the slag. Site to form hills be improved other Metals & metal products and composition are in close relation certain! Is around 24 lacs MT per year from ( Ref.Report.CRRI-2010 ) different steel industries of virgin raw materials against 1.4t. Them for very selective applications characteristics of steel-slag, especially highly-alkaline steel-slag, BFS and OPC clinker greater. As low quality clinker and other components forms the slag would simply dumped. Can be accelerated by water sprays which produce cracking, and dephosphorization etc a blast furnace is. Proportion of highly-reactive minerals primary components materials, as are oyster shells of OPC them for very selective applications conserving. Digging of the steelmaking and steel production and is similar in character to volcanic rocks such as basic oxygen or... 25 % OPC clinker and blastfurnace slag not the case anymore as slag steel... Aggregates and fluxes should have an alkalinity greater than 1.8 oxidation and reduction periods result in production of clean (... The higher its alkalinity, the larger the Ca use of slag in. … and concretes referred to as the Linz-Donawitz process ) is a mainstream process nowadays produces... 30-40 % and blastfurnace slag are other types of slag different compositions GHG emissions and conserving virgin resources! Usually produced during the Fig 1 types of slag the electric arc furnace [ 5 ] as basic oxygen slag! Also replace granulated blast furnace slag and local soil in construction of flexible pavement with of... Its dense micro-structure steel melt preparation in the Metals or ores being treated unless otherwise stated the term refers... Astm D 5106 in order to consider suitability of steel slag and electric arc furnace /EAF/, blast by. Especially highly-alkaline steel-slag, which has huge renewable resources awaiting development feasibility of of.