what is blast furnace slag

Iron production is via a continuous batch process with the iron and slag produced in the blastfurnace at a temperature around 1500ºC. It consists of non-ferrous components contained in the iron ore together with limestone as an auxiliary materials and ash from coke. Author(s) Tianqi Wang, Maryam Salehi, Andrew J. Whelton 8. Loesche Grinding Plant for Blast Furnace Slag - Spenner Zement - Duration: 5:33. Blast furnace slag is recovered by melting separation from blast furnaces that produce molten pig iron. Figure-4: Blast Furnace Slag Particles. Blast furnace slag is a secondary aggregate used widely in construction because of its performance attributes and durability. Coking plant . Performing Organization Report No. It should be noted that any imported BFS must also fulfil the relevant legal criteria in order to be shipped as a non-waste. YSMS vertical mill with capacity 150tph and 4200cm2/g;5000mm grinding table and 3pcs grinding rollers Granulated slag is the glassy, granular material formed when molten slag is rapidly chilled. When the iron is processed using a blast furnace, slag and iron both collect at the bottom of the furnace.The molten slag must first be separated from the molten iron. Cleaning up blast furnace slag in steel plants has always been a headache. Production and Processing. The main products of blast furnace smelting are pig iron, as well as by-product blast furnace slag and blast furnace gas. A database of the regional markets alongside the leading companies that have solidified their positions in these geographies are outlined in the report. LoescheGroup 3,596 views. Blast Furnace Slag is a co-product of the iron making process. Blast furnaces are used to produce pig iron from iron ore for subsequent During the period of cooling and hardening from its molten state, BF slag can be cooled in several ways to form any of several types of BF slag products. Blast furnace slag is a nonmetallic coproduct produced in the process. 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 . Permeability of concrete incorporating slag. cement.ca Les cendres volantes et le laitier de haut fournea u peuvent a ussi améliorer la malléabilité du mélange de béton et atténuer les éventuels problèmes de réaction alcali-silice. It is claimed that, concrete incorporating slag perform better in terms of permeability compare with controlled concrete because blast furnace slag in cement paste decreases the size of pores and consequently the permeability of slag concrete is declined. FHWA/IN/JTRP-2018/04 9. Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. GBS or Granulate as it is sometimes known is produced by rapidly cooling molten Blast furnace slag with water as the slag is tapped from the furnace. At voestalpine the two types of slag are separately collected, prepared, and processed further into products. It is actually a byproduct of iron production. Slag Dumping Area: In a blast furnace, while the process of extracting the iron has occurred at that time, we also get slag or impurities. Slag is primarily composed of CaO, SiO 2, aluminum oxide (Al 2 O 3), and magnesium oxide (MgO). Ground Granulated Blast Furnace Slag (GGBS) The importance of Ground Granulated Blast Furnace Slag (GGBS) lies in its greener way to become a substitute in concrete material. 5:33. Blast Furnace The iron oxide is reduced to hot metal by receiving heat from the ascending hot blast (oxygen, nitrogen) and injection (oil/pulverized coal) supply from the bosh region. Blast furnace slag composition has very important bearing on its physicochemical characteristics which affects the degree of desulphurisation, smoothness of operation, slag handling, coke consumption, gas permeability, heat transfer, hot metal productivity and its quality etc. injected coal) are combusted to produce […] It is removed from the blast furnace and allowed to cool. Below the throat, there is an increase in diameter to some extent known as the shaft after which the furnace maintains a constant diameter cylindrical section known as the belly. ASMS then further process the blast furnace slag into useful products for the construction industry such as concrete aggregates and road base products. Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Granulated Blast furnace slag (GBS) is a light coloured 0/4mm glassy sand produced by the rapid quenching of molten blast furnace slag using large volumes of water. Blast Furnace Slag Usage and Guidance for Indiana 5.Report Date April 2018 6. Portland blast-furnace slag cement definition is - a cement produced by intimately intergrinding a mixture of portland cement clinker and granulated blast-furnace slag in widely varying proportions. ABS is a crystalline by-product produced by the solidification of molten blastfurnace slag. Performing Organization Code 7. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States. It is a recovered industrial by-product of an iron blast furnace. Common components of slag include the oxides of silicon, aluminum, and magnesium, as well as sulfur, which is always present.It also contains phosphorous, calcium, ash, remnants of flux materials such as limestone, and remainders of chemical reactions between the metal and the furnace lining.Other compounds found in this material depend on the type of smelting. Molten slag diverted from the iron blast furnace is rapidly chilled, producing glassy granules that yield desired reactive cementitious characteristics when ground into cement fineness. When the metallurgical melting procedure is finished, the lime in the flux has been chemically united with the aluminates and silicates of the ore and coke ash to procedure an outcome named blast furnace slag which is non-metallic. Blast Furnace Slag is formed when iron ore or iron pellets, coke and a flux (either limestone or dolomite) are melted together in a blast furnace. Slags are principally divided into blast furnace slag and metallurgical slag. Blast furnace slag is formed during the production of hot metal by thermo-chemical reduction in a blast furnace. GGBS being a waste material, it needs proper method for disposal. POSCO also developed POSMENT, an eco-friendly cement with a higher portion of slag which reduces CO2 emission up to 60%. Blast Furnace Slag - Material Description ORIGIN In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. Coke and other reducing agents (e.g. On the one hand, it is because the environment where there is blast furnace slag is relatively harsh, and some gases contained in the mist are harmful to the human body. During this continuous process, iron ore or pellets as well as fluxes (lime[stone] and/or dolomite) are heated under reducing conditions in the presence of heated air. Blast-furnaces operate at temperatures of about 1,500°C and are fed with a carefully controlled mixture of iron ore, coke and limestone. "For example, ground and granulated blast-furnace slag - a by-product of the iron and steel industry - used to be dumped as trash because it is of no use, but it was found that it is extremely useful if added to cement," Mamdouh Hamouda, engineering director at Arkan Architects, says. Ground-granulated blast furnace slag is used as a raw material for cement production! GGBS (Ground Granulated Blast-furnace Slag) is a cementitious material whose main use is in concrete and is a by-product from the blast-furnaces used to make iron. Blast Furnace Slag is shaped when iron pellets or iron ore, coke, and limestone or dolomite (Flux) are heated together in a blast furnace. Approximately 290 kg of slag is generated for each ton of pig iron. Slag : Air-cooled blast furnace slag (ABS) What is ABS? Ground granulated blast-furnace slag, more commonly referred to as slag or slag cement, is a by-product of steel production. Cooled Blast Furnace Slag or Ground Granulated Blast Furnace Slag is not a waste. Production and Processing . Altogether 390,000 tons of POSCO slag was used for agricultural farming in 2018. To remove this we use two types of method. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product. The raw materials for blast furnace smelting are mainly composed of iron ore, fuel (coke) and flux (limestone). Blast-furnace slag is rich in silicic acid, an excellent fertilizer for rice farming. Europe’s Biggest Blast Furnace - … Performing Organization Name and Address Joint Transportation Research Program Purdue University 550 Stadium Mall Drive West Lafayette, IN 47907-2051 10. Slag cement, often called ground granulated blast-furnace slag (GGBFS), is one of the most consistent cementitious materials used in concrete. The recent study in the Granulated Blast-Furnace Slag Industry market offers a comprehensive study of this business sphere, in accordance to the key growth stimulants, opportunities, and constraints shaping the market dynamics. A. Blast-furnace slag is the nonmetallic product consisting essentially of silicates and aluminosilicates of calcium and other bases that develop in a molten condition simultaneously with iron in a blast furnace. A blast furnace is a special type of furnace for smelting iron from ore.Blast furnaces are very large. The blast furnace slag contains large quantities of calcium oxide (\(CaO\)), silicon dioxide (\(SiO_2\)), aluminium oxide (\(Al_2O_3\), alumina) and magnesium oxide (\(MgO\)). Raw Materials and Basic Principles . Figure: Ground granulated blast furnace slag. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. 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