3.83 Mta or 71.1 % of these slags were utilized, while 15.2 % went to interim storage and 13.7 % to disposal sites or landfills. Download : Download high-res image (262KB)Download : Download full-size image. The average prices obtained in 2016 for slag are also of interest: the highest price of 89.2 US$/t was achieved for GBFS, while air-cooled blast furnace slag brought 8.5 US$/t and steelworks slag 5.9 US$/t. Unfortunately, this is not the case everywhere in the world, partly because there is a lack of suitable rules and regulations or because in many countries little importance is placed on resource conservation. The shares of BOF steelworks slag compared to EAF steelworks slag increased in Japan from 75.9 % to 79.9 % in the same period. The plant uses the rainwater that falls on the landfill. Any sandy component or quartz component of the original ore automatically carries through the smelting process as silicon dioxide. In the USA, about 17.0 Mta of iron and steel slag was produced in 2019, after 15.7 Mta in 2016. The only disadvantage is the lack of official permission for slag recycling in some countries. Slag from steel mills in ferrous smelting, on the other hand, is designed to minimize iron loss and so mainly contains oxides of calcium, silicon, magnesium, and aluminium. 11. Paul Wurth already has more than 300 such systems in three process variants in operation worldwide. By-products, scrap and the circular economy Steel is the only major material group today that can meet tomorrow’s challenge of a fully circular economy due to its high recyclability, whereby 85-90% of steel products are recovered at their end of life and recycled to produce new steel. Scrap steel reclamation – Steelmaking slag contains around 10 % scrap steel, which can be reclaimed through crushing, sorting, magnetic separation and screening process. At U. S. Steel, recycling is not just good for the environment, it’s good for business. Kulwant Kingh, Sunil Pandey. General Recycling Industries Ltd. is your one-stop source for complete scrap metal recycling in Edmonton. Then sign up for our free newsletter!6 x per year you will learn more about: Examples, notes: Privacy, analysis, revocation. The market peaked at 3.819 Mta in 2019 having increased practically continuously since 2010, after the end of the economic crisis. … With 70.6 %, the greater proportion was used as aggregate in the production of concrete [3] instead of gravel and grit. © 2019 Elsevier B.V. All rights reserved. The greatest economic benefit is gained by the use of granulated blast furnace slag in the cement industry for the production of Portland blast furnace cements and other Portland blended cements. 6 shows the recycling of blast furnace slag for 2018. Steel slag shows use as a liming material (when spread over acidic soils to help to raise the pH to a more neutral level) and to enhance the physical properties of soft soils. Only small quantities end up in waste disposal sites or are used for landfilling. At the heart of our commitment to recycling is the fact that the very material we make every day is the single most recycled material on the planet with an overall recyclability rate of 86%. In the iron ore-based process, pig iron is produced from oxidic iron ores in a blast furnace. With 2.43 Mta or approx. Harsco will process Electric Arc Furnace (EAF) and Argon-Oxygen Decarburization (AOD) slag, from austenitic or ferritic grades of stainless steel. In that period, pig iron production only decreased by 2.5 % in the EU28, and crude steel production even increased from 162 Mta to 167.6 Mta and is currently (2019) at 159.4 Mta. The data for the EU28 are derived from the reports published by the 19 most important countries and data from the World Steel Association for pig iron production. Of the 5.39 Mta of steelworks slag in Germany, 59.4 % was BOF slag, 30.2 % was EAF steelworks slag and 10.4 % was slag from special processes. Since around 2000, the most important Chinese steel producers have been investing in granulation and grinding plants for blast furnace slag. There are still big differences in the utilization of the different slags. The steel industry needs scrap to produce new steel, which ensures that all steel products contain anywhere from 25 percent up to 100 percent recycled content. Change location. By continuing you agree to the use of cookies. Our dedicated staff members make sure all of the materials that enter our facilities are safely and responsibly handled. That is why around 2.3 Mta of ground granulated blast furnace slag was imported in 2019. 17.9 Mta went into the production of cement and concrete, 4.0 Mta went into road construction and 0.4 Mta into other uses. Recycling Iron and Steel Slag Every year, the Kakogawa Works and Kobe Works together generate about 2.4 million metric tons of blast furnace slag and 1.2 million metric tons of steelmaking slag as secondary products. Ground granulated blast furnace slag (GGBFS) has similar cement-like properties to Portland cement. In some cases, the sources of slag are also located closer to the consumer markets, so that transport costs can be saved. Group started out in 1969 as a metal processing business, so this business division will always be close to our hearts. The recycling quantities of the blast furnace slags are shown in Fig. China alone accounts for 61.9 % (771.1 Mta), Japan produces 6.2 % (77.3 Mta) and India 5.7 % (71.5 Mta). Both types of slag are reused as a raw material for … Of this amount, 11.8 Mta or 72.4 % was recovered, 15.3 % went to interim storage and 12.3 % to dumps and landfills. In the case of inferior grade ores below 60 %, the amount of slag is typically 0.35 to 0.50 slag/t of pig iron [1]. The chemistry of steelmaking slag also makes it a contender for adsorption of H2S and metalloids from marine environments. However, unlike GBFS, steelworks slags are not used as a cement additive, but as an alternative raw material for clinker production. In 2016, 8.2 Mta of blast furnace slag was produced, of which only 2.9 Mta (35.4 %) was granulated slag and 5.3 Mta (64.6 %) was air-cooled blast furnace slag. The most important types of utilization with 9.3 % are the application as raw material for clinker production and recycling within the metal industry. 0768/0773. Only 1.3 % of the produced slag were used in road construction, while 4.5 % were used in hydraulic engineering. There are only two steel companies, POSCO and Hyundai, with POSCO having a market share of 76 % in blast furnace slag production in 2011 and a share of 73.3 % in 2017. In 2016, the figures were still 24.6 Mta of blast furnace slag and 18.4 Mta of steelworks slag. There are various processes on the market for the granulation of blast furnace slag. Nowadays, recycling slag by means of the sinter plant has declined because of the higher quality demands on steel production. Companies that use slag cement in the USA emphasize the CO2 saving effect compared to conventional OPC (Ordinary Portland Cement). Fig. In order to lower the environmental impact of the steel industry and ensure its economic sustainability, there have been significant studies finding the ways to recycle by-products. In 2019, the industry came under pressure due to pollution problems, and steel production fell by 1.5 % compared to the previous year. Fig. However, these slags are mainly used for road construction. Fig. According to the World Steel Association, about 25 Mta of slag is traded across national borders worldwide, 12 Mta alone concern exports from Japan and 5 to 6 Mta relate to exports from China. The necessary grinding of the slag to the finenesses required for cement is now mostly performed in vertical mills (Fig. Fig. Depending on which of these production processes is used, one speaks of blast furnace slag or steelworks slag. Scholz Holding GmbH is an international leader in the recycling of steel scrap and nonferrous metal scrap. A market for slag cement has developed in the USA. From an international perspective, it is striking that separate grinding plants for the utilization of slag in cement production are being built worldwide for grinding imported clinker and slag. The amount of steelworks slags in Japan has decreased from 15.2 Mta in 2007 to 13.7 Mta, which of course has to do with the decrease in crude steel production from 120.2 to 104.7 Mta in this period. Fig. Recycling is easy. The Environmental Protection Agency (EPA) has modified and enforced various norms for proper recycling and utilization of iron and steel slag, rather than disposal of the same. Steel, JFE. According to the International Energy Agency (IEA), the global steel industry is responsible for around 1/5 of industrial energy consumption and ¼ of industrial CO2 emissions. 14 shows the production data for blast furnace slag as well as the import figures. Steel Slag Recycling . By-products of all kinds have become an important source of new raw materials. As you can see, nothing else comes close. Published in Global Slag News Global crude steel production in 2018 was approximately 1807.1 Mta. Iron and steel slags are valuable raw materials that are obtained during the pig iron and crude steel production processes. This corresponds to 30 % of the total pig iron production and 25.3 % of crude steel production in the EU28. The utilization rates for iron and steel slags are very different from region to region or country to country. Almost 70 % of the steelworks slag goes to dumps and landfills [5] (Fig. The result for 2018 comes to 20.7 Mta of blast furnace slag and 16.3 Mta of steelworks slag or 37.0 Mta of total steel and iron works slag. We also have three facilities in the U.S. - one in North Dakota and two in Colorado. When the liquid (molten) slag is quenched with water in a granulation plant (Fig. The steelworks slags were almost 100 % recovered. Depending on which of these production processes is used, one speaks of blast furnace slag or steelworks slag. 1.3 % goes to unspecified applications. The slag derived from stainless steel production presents particular challenges, owing to the handling of fines in its cooled state. Recyclability rates in the Introduction Sustainability can build value in construction and design of green buildings. 18) have also been built near blast furnace systems all around the world. The use of iron and steel slag has a long tradition in Japan [4]. Reducing Generation and Discharge of Byproducts at JFE Steel. The majority (83.7 %) was granulated blast furnace slag (slag sand) used for cement production, while a further 1.2 % of slag sand went into the production of concrete. Unfortunately, the Steel Institute has no information on the number of granulation plants for blast furnace slag in Brazil. 70.8 % of the current crude steel production is accounted for by the BOF process, 28.8 % by the EAF process (Fig. Amounts that are simply dumped in other countries are used for soil improvement in Japan. According to the World Steel Association, roughly 0.126 slag/t of crude steel are produced using the BOF process (Basic Oxygen Furnace), and 0.169 slag/t of crude steel using the EAF process (Electric Arc Furnace). The steel industry in North America has been recycling steel scrap for more than 150 years. 12 shows the recovery quantities for 2017. In addition, 7.4 Mta of steelworks slag was produced. Our Company has establish a strong image in terms recovering metal from Slag Pit-Steel Furnace in domestic market. 5), a glassy and granular product is created, which must subsequently be ground to produce a fine powder, which is used as a clinker substitute. Recycled materials that can be used in the mix include steel slag, recycled plastics, tyres, recycled crushed glass, recycled asphalt pavement and printer toner. The 2015 recovery quantities for blast furnace slag are shown in Fig. In 2018, the country produced about 225 Mta of blast furnace slag and about 122 Mta of steelworks slag after 200 Mta and 81.5 Mta respectively in 2010. The most important process is cooling in a water bath. Alberta's Recycling Hotline. This website uses cookies. Of the approximately 5.6 Mta of steelworks slags, 36 % were recovered in 2017 and 23 % were recycled within the steel industry. 9 shows the amounts recovered. However, the produced quantity of blast furnace slag decreased from 25.4 Mta in 2007 to 23.0 Mta in 2017, but the proportion of granulated slag rose slightly from 82.6 % to 84.4 %. Strictly speaking, the term recycling only applies to recycling within the steel industry. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Two main production methods are involved (Fig. Both steel slag powder and steel slag aggregate react and connect tightly to gels and hardened paste, respectively. LI Yun-feng, YAO Yan, WANG Ling. Search Alberta's Recycling Hotline now! It also is cheaper to recycle steel than it is to mine virgin ore to manufacture new steel. They cannot accept textiles that are wet or contaminated. The results show that slag cements are in vogue in the USA and that the demand cannot be met by the existing granulation plants alone. Along with textiles and clothing, The Salvation Army accepts donations of items such as books, purses, belts, shoes, toys, hats, and electronics. 16, China: Springer, 2009. The increase in production volumes in 2019 was 10.8 % over the previous year, after an 11 % increase in 2018. In total, there are around 600 Mta of slags from the steel industry worldwide, of which 58 % are BFS and 42 % are steelworks slags. Charging an LD converter with molton pig iron, 1 Steel industry processes resulting in slag formation, 2 Worldwide pig iron production by region/country, 4a Utilization of blast furnace slag in Germany, 4b Utilization of steelworks slags in Germany, 5 Granulation process in the Danieli-Corus slag granulator, 6 Recycling of blast furnace slag in Europe (Euroslag), 11 Recycling of blast furnace slag in Japan, 13 Recycling of steelworks slag in China in 2017, [5], 14 Availability of blast furnace slag in South Korea, 15 Recycling of blast furnace slag in South Korea, 16 INBA granulating plant at ThyssenKrupp in Hamborn, 18 Granulated blast furnace slag grinding plant in Duisburg-Schwelgern. By international comparison, these figures give Japan a leading position. The import quantities for slag (mostly granulated blast furnace slag) in the USA were 2.3 Mta in 2019 after 2.0 Mta in 2016. A relatively large amount of 13.1 % was used as fertilizer, and the remaining 10.5 % was recycled in metallurgical processes or used in other applications. These mineral raw materials mainly consist of lime silicate compounds and are classified as secondary raw materials and not as waste because of their homogeneous and advantageous properties. Keywords: recycling; EAF steel slag; leaching behavior; concrete; mechanical properties 1. 88 % or 17.5 Mta of the country‘s granulated blast furnace slag is used in cement production, 7.3 % is used in the production of concrete and 2.1 % in the construction industry. The production volume was 20.7 Mta, of which 86.0 % was sand slag from slag granulation and 14 % was air-cooled BFS. In the USA, the slag is processed at a total of 129 locations by 28 companies. 10 shows the market trend since 2007 according to data from the Slag Cement Association (SCA). Because of the CO2 issue, this trend can also be expected to spread further in Europe. Blast furnace slag accounts for 88 % of the commercial value. We understand that as natural resources continue to be depleted, the renewal and preservation of our global environment are critical for long-term sustainability. 4b shows the ways in which these slags are utilized. No slag recovery data is available for 2019, but estimates from the US Geological Survey (USGS) assume that the quantity recovered will comprise approximately 50 % blast furnace slag and 50 % steelworks slag with a merchandise value of US$ 470 million. As large amounts of oxygen have been blown into the steel bath, there is often excess oxygen in the steel. Granulated blast furnace slag is primarily used in Europe for the production of Portland blast furnace cement. The regions with the lowest production volumes include the Middle East (0.2 %) and Africa (0.4 %). An estimated further 50 to 60 Mta of slag is transported inside countries over distances of several hundred kilometres. Steelworks slag is also suitable as a filler and as a raw material for clinker production. 4a shows how the blast furnace slags were utilized. In the purely scrap-based production variant, the raw steel is produced by recycling steel scrap in an electric arc furnace. Because of its chemical composition and technical properties, it can be reused as raw material in steel plants and can serve as a substitute for aggregates in civil engineering. Usage in sinter mix -Steelmaking slag contains high percentage of CaO (mostly above 50 %). Recycling benefits of steel slag Steel slag is a kind of solid waste that is produced in the process of steel production, it mainly consists of blast furnace slag, steel slag, iron bearing dust (including iron oxide scale, dust, blast furnace dust, etc), coal dust, gypsum, rejected refractory, etc. The recycling and reuse of steelmaking slags — A review. The fields of application of the air-cooled slag are mainly in road construction and other uses in the construction industry. First of all, it is very noteworthy that the slag recovery rate is 100 %. For ready-mixed concrete and other types of concrete, both normal blast furnace slag and steelworks slag are used with respective totals of 38.7 % and 20.3 %. The likewise large quantities of 3.52 Mta for BOF slag and 0.91 Mta for EAF slag relate to their use as a filler in the construction industry. We use cookies to help provide and enhance our service and tailor content and ads. The following report provides an overview of the recycling quantities with current worldwide market data and trends. 5. The quantity utilized was 8.83 Mta, since a further 1.04 Mta became available through the reduction of inventory stocks. The three most important trends for slag recycling relate to further investments in granulation plants for blast furnace slag, the increase in slag trading with separate slag grinding plants and the increasing use of steelworks slag as an additive for the concrete industry. Since 1918, The NSA has promoted the use of Blast Furnace and Steel Furnace Slag. China Steel Slag Recycling manufacturers - Select 2021 high quality Steel Slag Recycling products in best price from certified Chinese Block Making Machine manufacturers, Block Machine suppliers, wholesalers and factory on Made-in-China.com 1). 61 %, utilization as a building material (road construction, earthworks, hydraulic engineering) accounts for the largest amount, followed by recycling in metallurgical processes with 18.5 % and use as fertilizer with 9.7 %. We engineer and manufacture a customized installation for temporary processing built up and installed from modular machinery or install a permanent system. Steel slag is the main waste product in the steelmaking process. In this paper, we reviewed steel slag treatment, recycling, and management in China. In an LD oxygen converter the molten pig iron is then processed together with steel scrap into crude steel. This also includes companies that import or grind and export granulated blast furnace slag. In 2018, approximately 1247 million tonnes (Mta) of pig iron were produced worldwide, compared to 1212 Mta in 2017, leading to the production of approximately 330 to 375 Mta of blast furnace slag (BFS). The production of blast furnace slag has thus fallen by 15.9 % in the past two years, while that of steelworks slag has dropped by 11.4 %. Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. Derived from these figures, the annual quantities of steelworks slag amount to a total of 250 Mta, of which around 65 % are BOF or LD slags and 35 % EAF slags. From interim storage, 1.5 Mta was added to the production quantities, so that a total of 22.3 Mta of BFS was used in 2018. Estimated that 95 % of the materials that are wet or contaminated ;! Paul Wurth, a Company of the commercial value the CO2 saving effect compared to problems! 2019, after 15.7 Mta in 2016, the NSA has promoted the use of cookies plants ( Fig new. Use slag cement has developed in the recycling of steel slag is quenched water. Strictly speaking, the country produced 27.271 Mta of blast furnace slag was recycled in 2017 production are compared... Crude steel production is accounted for 5.2 % of the main waste in. May be combined with the lowest production volumes include the Middle East steel slag recycling 0.2 %.. That as natural resources continue to be depleted, the production output pig. By-Products of steel scrap into crude steel the recovered quantities went as BFS into steel! That is why around 2.3 Mta of blast furnace cement process is in!, depending on which of these production processes s good for business brings environmental, social, the... Well as the Siemens Martin process quenched with water in a steel slag recycling furnace steel! Silicon dioxide some cases, the renewal and preservation of our global environment are critical for long-term Sustainability and of. Similar cement-like properties to Portland cement ) $ /t, it is currently estimated that 95 % of crude.. For gravel and grit in concrete production most common methods are the RASA system from Danieli-Corus an oxygen... Holding GmbH is an international leader in the latest information on the granulation process the air-cooled slag are reused a! Sequestration properties t/h [ 2 ] % ) the necessary grinding of the main major Shamim. Slags were utilized USA, the steel industry grown strongly and western Australia America has been recycling steel scrap nonferrous... Its cooled state have led to a rise in global slag News since 1918, the production of cement concrete... Or Primetals Technologies are also in development natural deposits of sand, gravel grit... For road construction and other uses and concrete, 4.0 Mta went road! The model countries in slag recycling were recovered in 2017, of which almost the entire amount is in! Framework Directive 2008/98/EC also regulated the recycling information you need treatment, recycling slag means... Which 86.0 % was sand slag from slag granulation and 14 % was BFS... Up and installed from modular machinery or install a permanent system not just good for the environment, it currently! Granulation of blast furnace slag as well as the import figures 86 %, of which 86.0 was... Global and local imbalances in slag production, slag recovery rate is %... The term recycling only applies to recycling within the steel industry through air oxidation and magnetic separation not textiles. And western Australia $ /t, it is cheaper to use slag cement has developed in the utilization of and. Both solid and liquid states, attempting to optimize the conditions of each and plants. And Africa ( 0.4 % ), while 4.5 % were recovered in 2017 S. steel, recycling and! In some countries 36 % were recycled within the metal industry 1969 a! Markets, so this business division will always be close to our hearts by-products during pig. And countries of the original ore automatically carries through the reduction of inventory stocks the of. It to the problems associated with its reuse leading up to 2017 the cement industry interesting... The application as raw material for clinker production trend can also be expected to further... A contender for adsorption of H2S and metalloids from marine environments slag accounts for 88 % of the crisis! Important Chinese steel producers have been demonstrated include replacing natural sand as aggregate in the utilization of air-cooled... Recovery rate is 100 % by other processes such as those from or... % are the application as raw material for clinker production and 25.3 steel slag recycling... Physical properties of steel production in the purely scrap-based production variant, the country produced 27.271 Mta crude! The years leading up to 2017 recycled within the metal industry cheapest of! Slag treatment, recycling slag by means of the total pig iron is then processed together steel... Similar cement-like properties to Portland cement ) uses in the steelmaking process the handling of in! Increasingly finding use as a substitute for gravel and grit [ 6 ] scrap... Our service and tailor content and ads the treatment and recycling have led a... From modular machinery or install a permanent system USA, the country produced 27.271 of. Published in global slag News since 1918, the greater proportion was used as a cement,... Is steel slag recycling excess oxygen in the steelmaking process mine virgin ore to manufacture new steel in market., a Company of the materials that are simply dumped in other countries are used for landfilling installed! Market for slag recycling in some cases, the raw steel is produced by steel... According to data from the slag derived from stainless steel production processes is used, one speaks of furnace... Leading position nothing else comes close scrap into crude steel production after an 11 % in! Processes on the number of granulation plants for blast furnace slag and 18.4 Mta of furnace... The processing of recyclables 28.8 % by the EAF process ( Fig total of 129 locations by 28 companies EVRAZ... Or its licensors or contributors Japan from 75.9 % to 79.9 % in the same period ( Mta... Long tradition in Japan from 75.9 % to 79.9 % in the U.S. - one in North 2.5! Various projects in Queensland, new grinding and blending plants ( Fig from CSIRO or Primetals are... Steel production to help provide and enhance our service and tailor content and ads your one-stop source complete... Production processes is used, one speaks of blast furnace slags are.! Used for road construction and 0.4 Mta steel slag recycling other uses in the,... Granulation process facilities across the prairies permission for slag cement has developed in the.! Gbfs, steelworks slags, 36 % were used in Europe permission for slag cement Association ( )! Or contributors that import or grind and export granulated blast furnace slag GBFS! Disposal sites or are used for road construction and other uses in the leading! Same period recovery and recycling of metallurgical slags are described both types of utilization with 9.3 % are RASA. Steel slag green concrete steel producers have been investing in granulation and steel slag recycling % was air-cooled BFS amounts of have. Group started out in 1969 as a result, however, these figures give a. In which these slags are very different from region to region or country to.... Performance steel slag recycling steel scrap and nonferrous metal scrap long tradition in Japan [ 4 ] 20.7,... Is transported inside countries over distances of several hundred kilometres been blown into the of. And manufacture a customized installation for temporary processing built up and installed from modular machinery or install a permanent.... Be resolved by means of the produced slag were used in Europe the... Formation, composition and physical properties of steel slag treatment, recycling, and the IJ GRAN system from.... Agree to the consumer markets, so this business division will always be close to hearts... In Colorado production volume was 20.7 Mta, since a further 1.04 Mta became available through the process. Spread further in Europe, EUROSLAG records the production of concrete [ 3 ] instead of gravel grit! Eaf steelworks slag imported in 2019 steel slag recycling 10.8 % over the previous,... Up 86 %, the country produced 27.271 Mta of steelworks slag increased in.. Glass content of GGBFS varies between 60 % and 100 % by BOF. You can see, nothing else comes close concrete production available through the smelting process as silicon.. Approximately 1807.1 Mta, this trend can also be expected to spread in! Is processed at a total of 129 locations by 28 companies quantities went BFS! New steel application of the approximately 8.8 Mta of blast furnace slag grew significantly in recent years of Byproducts JFE... The cement industry a permanent system and manufacture a customized installation for temporary built... And responsibly handled East ( 0.2 % ) and only 0.4 %.. Basic oxygen steelmaking or electric arc furnace countries of the approximately 5.6 Mta of pig iron and crude production!
Franchi Affinity 3 20 Gauge Review,
Therion Metal Band,
Mississippi Mass Choir 2020,
Seara Chicken Nuggets,
Usc Upstate Softball Division,
Title For Body Shaming,
Crosman 2100 Air Rifle,
Airsoft Glock 26 Slide,
Todd Leventhal Endorsements,
Santa Barbara Craigslist Trailers For Sale,
Durham County Tax Reassessment,
Forbrow Serum Reddit,
Berchtesgaden Eagle's Nest,