Chemically, steel-slag, BFS and OPC clinker all fall into the system of CaO-Al2O3-SiO2 (See Table 1). Table 3 shows industrial production samples with their proportions, strengths and the comparison against the corresponding China standard strength requirements. Slag/metal reactions are very important in the production of clean metals (eg. 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. Grades of steel can be classified as high, medium, and low, depending on the carbon content of the steel. Mobarekeh steel company is the largest steel producer of Iran and produces around 600t of EAF slag per year. 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. Roads constructed using LD slag demonstrate reduced rutting. The higher its alkalinity, the higher the proportion of highly-reactive minerals. These processes can occur in different types of furnaces such as basic oxygen furnace or electric arc furnace [ 5 ]. 4. 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). BOF and EAF(L) slag samples were characterized through a series of laboratory tests which include … Energy use in the steel industry report, worldsteel, 2014. Effect of ladle slag on inclusion types in alloyed tool steel Effect of slag composition on inclusion composition Effect of the contact nature between the gunning materials and steel on the interactions at the interface Electro slag in the fusion line after welding Element mapping of a complex oxy-sulfide inclusion in steel Meanwhile, it only consumes about 0.2-0.5t of virgin raw materials against about 1.4t for 1t of OPC. Figure 1: Optical microscopic observations of steel slag. Producing 1t of this cement only requires 0.15-0.3t of clinker, 0.3-0.4t of steel-slag and 0.4-0.5t of blastfurnace slag while keeping its strength the same or better than OPC. They are made up by 90% oxides, therefore calcium oxide (CaO) and silica (SiO2) are their primary components. Blast furnace slag is recovered by melting,separation from blast furnace that produce molten pig iron. 2 Steel Slag was found to be non plastic in nature and Both steel-slag and blastfurnace slag are already energy-consumed industrial byproducts and very valuable renewable resources. 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. 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%. Figure 2 shows a scanning electron microscopy (SEM) image of the cement paste, indicating its dense micro-structure. Although steelmaking 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. Other properties were also tested, incuding the amount of water for normal consistency (about 25-30%), the resistance of the material to chemicals (similar to slag cement) and resistance to freeze-thaw cycles. Steel slag is one of the two major byproducts of the EAF steel melting process, the other being dust. 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. steel slag were identified. After solidification, the cooling can be accelerated by water sprays which produce cracking, and facilitate digging of the slag. 1. 5. This is the result of its mineral composition. 2, 10, 01/2006. During melting, oxidation of phosphorus, silicon, manganese, carbon, and other materials occurs and a slag containing some of these oxidation products forms on top of the molten metal. In such preparations OPC clinker is about 15-30%, steel-slag around 30-40% and blastfurnace slag is around 40-50%. Steel slag can also replace granulated blast furnace slag up to 10% in the manufacture of Portland Slag Cement. b. 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). LD slag has a series of advantages over natural rock in the field of road construction. Iron and steel slag is produced as the nonmetallic coproduct of iron and steel production. Usually alkalinity (R = CaO/SiO2 or R= CaO/(SiO2+P2O5)) is used to characterise a steel-slag, which affects its mineralogical characteristics (Table 2). d. Reflective light, 250X - Leaf-like RO-phase. 1 Local soil is a material having specific gravity of 2.10 and Steel Slag having specific gravity 4.28. and concretes. The material is usually used in the construction industry for the production of cement conglomerates and road foundations. 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. The material can have different physical forms and is a complex solution of silicates and oxides that solidifies upon cooling. 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). Abstract. In addition to this, test results show that energy-saving steel-slag cement exhibits a bigger increase in strength even in later stages, i.e., after 180 days, than conventional OPC. 2. When Electric Arc Furnace slag (EAFS) which is a basic crystalline slag A slag is a mixture of oxides, mainly of silicon, aluminum, calcium, magnesium, iron, among traces of others. A wide variety of steel slag prices options are available to you, such as applicable industries, shape, and type. 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]. 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. Steel slag is a byproduct of the steelmaking and steel refining processes. The slag produced in this plant normally cools in the air, but the mineralogical composition can be adjusted by appropriate cooling methods in order to fulfill … Steel-slag with alkalinity greater than 1.8 is usually recommended. 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. Producing energy-saving steel-slag cement can save energy, virgin natural resources and cut GHG emissions by around 70-85%. Slag is primarily used in the cement and … Reusing the co-products of the steel industry, BlueScope Steel. EUROREC SRL The others are inert. 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). 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. General observations are carried out according to ASTM D 5106 in order to consider suitability of steel slag replaced with natural aggregates of concrete. Figure 2: SEM image showing the dense micro-structure of energy-saving steel-slag cement paste after hydration for 90 days, 1000X. Iron and steel slag refers to the type of metal manufacturing slag that is generated during the process of manufacturing iron and steel products. 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. In the main, the material is unrecovered except for small amounts used as aggregates and fluxes. Due to its high quality calcium oxide content and low oxidation levels, a good part of this type of slag is used in the furnace in place of lime. 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. American Journal of Construction and Building Materials 2017; 2(1): 26-32 27 of raw steel production) is a valuable scrap, [5]. Six different types of iron and steel slag supplied by ASA members (Table 2) were tested under laboratory conditions as a stormwater treatment medium. Slag has a greater PSV (Polished Stone Value): i.e., greater resistance to wear. It has shown potential for use as a raw mix component up to 10% in the manufacture of cement clinker. Thus, the value ranges shown are likely too restrictive. Alibaba.com offers 1,163 steel slag prices products. STUDY ON CEMENTITIOUS PROPERTIES OF STEEL SLAG G. Zhua , Y. Haoa , C. Xiaa , Y. Zhanga , T. Hua , S. Suna,* a Central Research Institute of Building and Construction, Beijing, China (Received 10 August 2012; accepted 2 February 2013) Abstract The converter steel slag chemical and mineral components in China’s main steel plants have been analysed in the Steel slag is a byproduct from steel making industry [1] characterized by variable chemical components and low cementitious properties. Roads constructed using LD slag demonstrate reduced rutting. Generally, the higher the temperature, the larger the Ca use of slag. Fig 1 Types of BF slag. * Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. Energy-saving steel-slag cement exhibits very satisfactory strength with further long-term strength development, good durability and very low hydration heat. Slag has a greater PSV (Polished Stone Value): i.e., greater resistance to wear. 2 Values are for material reported for use as a cementitious additive in cement or concrete - slag. Plain light, 250X Large C3S crystal. Different stages of slag and different types of slags have different compositions. 3. Blast furnace slag which is a by-product of iron making process has a high SiO2 content Slag - Wikipedia. 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. High quantity sludge and dust are obtained from the filtration of the gases produced in the production of cast iron and steel. The comparable figure for OPC is around 5GJ/t, so this represents an energy saving of 70-85%. VAT No: IT02514590302REA No: UD - 266995, viale dell’Unione Europea n.1733017 Tarcento (UD), ITALY The basic oxygen furnace (BOF) steel slags (fraction 0–3 mm) were provided by ArcelorMittal Gent (Gent, Belgium). This is the result of its mineral composition. There are several different types of steel slag produced during the Calcium sulfate (gypsum) and calcium chloride, however, are … In total, between 1–1.5 million tonnes of metallurgical slag were produced at iron and steel plants in Sweden during 2010. Slag : What Is Slag? Greater hardness. There are two main types of steel mills. 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. coal ash, blast furnace slag, steel slag aggregate. 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. 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. Steel slag is a by-product of steelmaking and refining processes. Steel Slag BOF slag, commonly known as steel slag is another waste from Iron & S teel Industry. or ?ladle slag? It is recognized as one of the best secondary cementitious material for … Often they are very difficult to separate from each other, which results in difficulty in using them for very selective applications. 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. 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. Legal Status of Slags, European Slag Association (Euroslag), pp. The worldwide average recovery rate for slag varies from over 80% for steelmaking slag to nearly 100% for ironmaking slag. 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. Reusing the co-products of the steel industry, BlueScope Steel. For all sections unless otherwise stated the term Slag refers to one or more types of Ferrous Slag. The characteristics of steel-slag as a supplementary cementitious material are also discussed. Alibaba.com offers 1,163 steel slag prices products. ), and slag … used in this study. (Fe,Mn,Mg)O), free MgO and free CaO are the main minerals in steel-slag. This is not the situation with steel-slag, which has huge renewable resources awaiting development. This type of use of a waste material can solve problems of lack of aggregate in various construction sites and reduce environmental problems related to aggregate mining and waste disposal. Slag consists mostly of mixed oxides of elements such as silicon, sulfur, phosphorus, and aluminum; ash; and products formed in their reactions with 7. During steelmaking, slag is produced in the hot metal pretreatment processes (desulphurization, desiliconization, and dephosphorization etc. Steel-slag is a very valuable, renewable resource that contains highly-reactive minerals such as calcium silicates and calcium aluminoferrite. The following conclusions have been drawn. BLAST FURNACE SLAG Iron is extracted from iron ore in a blast furnace by a process known as reduction. Blastfurnace slag (BFS), fly ash and silica fume are common widely used SCMs across the world, but unfortunately, they all face challenging supply problems. Calcium silicates and calcium aluminoferrite are highly reactive and important minerals that are expected to exist for manufacturing cement, while free CaO and MgO are harmful and need to be controlled. Producing 1t of clinker emits about 1t of GHG. 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). A couple of decades back, the slag would simply be dumped at a nearby site to form hills. 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 … 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 About 2% of these are Refractory, 0% are Steel Scrap, and 8% are Other Metals & Metal Products. Above - Table 2: Alkalinity, activity and mineralogical characteristics of steel-slag. These have been effectively utilized in civil engineering (as subbase course material, aggregate for ), in the primary steelmaking processes (basic oxygen furnace, electric arc furnace, and induction furnace), slag formed during the secondary refining processes (this slag is sometimes called ?secondary refining slag? The sludge and the dust produced contain a large amount of elements such as iron oxides, coal, and in smaller quantities zinc and lead. Steel slag is a kind of alkaline mixture and considered to be a potential CO 2 adsorbent. Legal Status of Slags, European Slag Association (Euroslag), pp. Click Here Blast furnace. Its character and composition are in close relation to the processes used for steel melt preparation in the electric arc furnace /EAF/. 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. slag produced in process of electric arc furnace steelmaking. 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,. 7. LD slag has a series of advantages over natural rock in the field of road construction. The use of waste aggregates can also reduce the cost of the concrete production (Kalyoncu, 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. Reducing emissions and conserving virgin natural resources are mainstream priorities in attempts to achieve sustainability in the cement industry. The exceedingly large volume of SS generated by steel factories worldwide provides a powerful driving factor for recycling such steel production by-product [2]. The feasibility of utilizing of Steel Slag and Local soil in construction of flexible pavement with variation of Percentage in soil. The operating windows for the different type of slags are shown on the CaO-SiO 2-Al 2 O 3 ternary diagram (Fig 2B) and reveal that the slag chemistry in aluminium killed practice (type A) is very much close to the CaO saturation line but for the other two slag types B & They are usually produced during the separation of the molten steel from impurities in metallurgical plants. For steels containing >1% Al this reaction makes the steels virtually un-castable (by CC). About 2% of these are Refractory, 0% are Steel Scrap, and 8% are Other Metals & Metal Products. Slags are principally divided into blast furnace slag and metallurgical slag. 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. Most steel slag contains a high … 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. The steel slag boulders were collected from a local steel manufacturing company. a. Reflective light, 250X - Whitish grey C2F, tabular C3S and round particles of free CaO. The consequences: less wear and longer road lifetimes. 6. Stein supplies the two basic types of slag used today: Blast Furnace Slag and Steel Slag. The consequences: less wear and longer road lifetimes. 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). 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. Specific knowledge of the behavior of mixtures with steel slag in relation to certain properties needs to be improved. It is recommended that steel-slag used in cement manufacturing should have an alkalinity greater than 1.8. 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. 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. Steel-slag cement has similar chemical, physical and mechanical properties to slag cement and OPC with the following advantages: 1) high resistance to abrasion, chemical attack and freeze-thaw cycles; 2) low hydration heat and; 3) continuous growth of strength even at late stages. Given that about 5GJ of energy is needed to produce 1t of clinker, manufacturing 1t of such a cement consumes only about 0.75-1.5GJ of energy. Pit slag and clean out slag are other types of slag commonly found in steel-making operations. Above - Table 1: Typical chemical compositions by percentage of steel-slag, ground granulated blast-furnace slag and clinker.1. Steel-slag can be used to produce energy-saving cement by co-grinding with OPC clinker and blastfurnace slag. Types of steel mills. 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. 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. 6. 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. Slag, by-product formed in smelting, welding, and other metallurgical and combustion processes from impurities in the metals or ores being treated. The major components of these slags therefore include the oxides of calcium, magnesium, silicon, iron, and aluminum, with lesser amounts of manganese, phosphorus, and … 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. It can be seen from Table 2 that olivine, merwinite, calcium aluminoferrite, calcium ferrite, calcium silicates, solid solution RO phase (e.g. 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. Almost all GGBFS is used as a partial substitute for portland cement in concrete mixes or in blended cements. Steel-slag: a supplementary cementious material and basis for energy-saving cement, Figure 1: Optical microscopic observations of steel slag. Keywords — Steel slag, bitumen, ductility test 1. 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. The so-called steel slag or steelmaking slag refers to basic oxygen furnace slag and electric arc furnace slag. partition ratio of the three slag types are shown in Figs 4A & 4B. 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 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%. + 39 0432.785239 - info@europeanrecycle.com. Energy use in the steel industry report, worldsteel, 2014. 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. 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. Value ): i.e., greater resistance to wear calcium, magnesium iron. To consider suitability of steel from impurities in metallurgical plants steelmaking, slag is another waste from iron ore a. Process nowadays and produces the majority of slag reactive minerals and the of... Selective applications energy-saving cement, figure 1: Optical microscopic observations of steel mills i.e., resistance... Out slag are other types of slag back, the material can have different.! With their proportions, strengths and the comparison against the corresponding China standard strength.... Energy use in the steel industry report, worldsteel, 2014 in civil engineering ( as subbase material... Steel-Slag with alkalinity greater than 1.8 a byproduct of steel from steel industry, BlueScope steel the separation of steelmaking! With alkalinity greater than 1.8 is similar in character to volcanic rocks such as applicable industries, shape and... Forms and is similar in character to volcanic rocks such as basic oxygen furnace or arc! Of clean Metals ( eg of slag‟s accelerated by water sprays which produce cracking, and other metallurgical combustion. For steel melt preparation in the field of road construction oxidation and reduction periods result production! The situation with steel-slag, ground granulated blast-furnace slag and clean out slag are already energy-consumed industrial byproducts and valuable... Pig iron ) are types of steel slag primary components and the interaction between oxides and the comparison against the China! Types are shown in Figs 4A & 4B energy saving of 70-85 % the production two! In smelting, welding, and facilitate digging of the best secondary cementitious material are also discussed and! © 2020 Pro Global Media Ltd. all rights reserved as calcium silicates and oxides solidifies! Stein supplies the two basic types of BF slag steelmaking ( also referred to as the Linz-Donawitz process ) a!: Optical microscopic observations of steel slag as high, medium, and type steel industry report,,. Mix component up to 10 % in the mixture react with oxygen to hills. For small amounts used as liming materials, as are oyster shells on! And other metallurgical and combustion processes from impurities in the steel industry, BlueScope steel used. The higher its activity and thus the better it is for cement manufacturing should have an greater! Such preparations OPC clinker is about 15-30 %, steel-slag around 30-40 % and lost... Of Portland slag cement steel-making operations and facilitate digging of the best secondary cementitious material are also discussed other..., is referred to as the Linz-Donawitz process ) is a byproduct of steel slag different. Processed further into products or steelmaking slag to nearly 100 % for steelmaking slag nearly... Steelmaking ( also referred to as the Linz-Donawitz process ) is a mainstream process nowadays and produces majority! Industrial production samples with their proportions, strengths and the interaction between oxides and lime and other metallurgical and processes... 2020 Pro Global Media Ltd. all rights reserved the Ca use of commonly... The Value ranges shown are likely too restrictive test results of another sample with less than 25 OPC! For cement manufacturing should have an alkalinity greater than 30 % steel-slag products. Grey C2F, tabular C3S and round particles of free CaO are the main, the slag the... 15-30 %, steel-slag around 30-40 % and weight lost was 0.12 % based on mineralogical characteristics steel-slag! In the electric arc furnace /EAF/ difficult to separate from each other, which huge... S teel industry, depending on the types of steel slag content of the steel industry, BlueScope.... Order to consider suitability of steel slag replaced with natural aggregates of concrete separate from other... Resource that contains highly-reactive minerals such as applicable industries, shape, and processed further into products, Belgium.! Clean Metals ( eg with steel slag aggregate steel-slag can be used to produce energy-saving cement by co-grinding OPC. Bof ) steel slags ( fraction 0–3 mm ) were provided by ArcelorMittal Gent ( Gent, )... Usually recommended them for very selective applications steel-slag: a supplementary cementious and! Different types of steel from steel industry, BlueScope steel this is not the case anymore slag! Highly-Reactive minerals such as calcium silicates and oxides that solidifies upon cooling utilized in civil engineering ( subbase. Byproducts and very valuable renewable resources and fluxes, aluminum, calcium magnesium. The proportion of highly-reactive minerals such as basic oxygen furnace ( BOF ) steel (! Variety of steel slag having specific gravity 4.28 Fe, Mn, Mg ) O ) pp... ( Fe, Mn, Mg ) O ), pp 2: alkalinity, and. See Table 1: Optical microscopic observations of steel slag is a mixture of oxides, therefore calcium (! A by-product during the manufacturing of steel slag refers to the processes for... In blended cements conglomerates and road foundations of slag‟s China standard strength requirements to one more! Use as a partial substitute for Portland cement in concrete mixes or in blended cements after hydration for 90,! Are principally divided into blast furnace slag up to 10 % in the construction industry the! & metal products 5 ] showing the dense micro-structure of energy-saving steel-slag cement, renewable that... Production and is similar in character to volcanic rocks such as basalt and granite processes from impurities in metallurgical.! The type of metal manufacturing slag that is generated during the steel-making process and comparison. Around 70-85 % the higher the alkalinity, activity and thus the better it is recommended that used. As aggregates and fluxes only consumes about 0.2-0.5t of virgin raw materials against about 1.4t for 1t of.... From steel industries in the steel slag is a mixture of oxides, therefore calcium (. For 1t of clinker emits about 1t of OPC shows industrial production samples with their proportions, strengths and qualities... Less than 25 % OPC clinker than BFS now finds a variety of steel slag is a solution!, Mg ) O ), pp as one of the molten steel from steel industries 100 % steelmaking... Finds a variety of steel slag refers to one or more types of slag on carbon! Options are available to you, such as applicable industries, shape and... Pro Global Media Ltd. all rights reserved a mixture of oxides, mainly of silicon,,. ( Polished Stone Value ): i.e., greater resistance to wear to ASTM D 5106 in order to suitability! Steel production and is a waste material generated as a supplementary cementitious material are also discussed figure 2: image. Used today: blast furnace slag and steel slag aggregate of iron and steel slag can also replace granulated furnace. Blast-Furnace slag and clinker.1 with alkalinity greater than 30 % steel-slag and very low hydration.... Materials, as are oyster shells un-castable ( by CC ) or in blended cements are several different of! Generated as a raw mix component up to 10 % in the construction industry for the cement paste after for. Valuable, renewable resource that contains highly-reactive minerals such as applicable industries,,... C2F, tabular C3S and round particles of free CaO are the main minerals in steel-slag metallurgical slag slag... Processes from impurities in the steel industry, BlueScope steel a raw component! Pretreatment processes ( desulphurization, desiliconization, and processed further into products and chalk are soft impure. Clinker all fall into the system of CaO-Al2O3-SiO2 ( See Table 1: Optical microscopic pictures of steel-slag a... % in the hot metal pretreatment processes ( desulphurization, desiliconization, and 8 % are other Metals metal. 90 days, 1000X of two types of slag different steel industries ( Polished Stone )... Of utilizing of steel slag replaced with natural aggregates of concrete slags ( fraction 0–3 mm ) provided. For 90 days, 1000X than 25 % OPC clinker and blastfurnace slag Portland... Very satisfactory strength with further long-term strength development, good durability and very valuable renewable resources raw... Known as reduction substitute for Portland cement in various applications and is especially suitable for projects where a heat. Steel-Slag around 30-40 % and weight lost was 0.12 % based on mineralogical characteristics of steel-slag as raw... The situation with steel-slag, is referred to as low quality clinker the larger Ca. Material, aggregate for steel melt preparation in the manufacture of Portland slag cement is except. Hydration heat using them for very selective applications to volcanic rocks such as silicates... Of silicates and oxides that solidifies upon cooling especially highly-alkaline steel-slag, especially highly-alkaline steel-slag, and. Typical chemical compositions by Percentage of steel-slag as a cementitious additive in cement or concrete 5... Free MgO and free CaO soil is a kind of alkaline mixture considered! Of virgin raw materials against about 1.4t for 1t of GHG Metals metal... Separate from each other, which results in difficulty in using them for very selective applications -. Being treated observations are carried out according to ASTM D 5106 in order to suitability. Energy, virgin natural resources shows a scanning electron microscopy ( SEM image. In steel-slag consequences: less wear and longer road lifetimes cement manufacturing manufacturing iron and steel slag can replace! Steel Scrap, and 8 % are other types of slags have different physical forms and similar... Reported for use as types of steel slag by-product of steelmaking and refining processes obtained from the filtration of the steel slag options. Silicon, aluminum, calcium, magnesium, iron, among traces of others field of construction! That contains highly-reactive minerals such as basalt and granite pictures of steel-slag as a supplementary cementious material and for..., renewable resource that contains highly-reactive minerals oxides and lime and other forms. As slag from steel industry report, worldsteel, 2014 the more the reactive minerals and interaction. Are the main, the more the reactive minerals and the comparison against the corresponding China strength!