Blast Furnace Slag. Therefore, an in-depth understanding of phase composition and formation mechanism of slag crust is helpful to clarify the protection mechanism of copper stave, so as to control the growth of the slag crust and to increase the service life of copper staves. Composition In modern ironmaking, using rich ores, the ore may contain several percent of silica and this becomes a major component in the slag. The beneficial effect of blast furnace slag on the alkali silicate reaction was reported in [44], and the effect has two parts: First, blast furnace slag cement has a denser pore structure than Portland cement, and this hampers different transport processes needed for alkali silica reaction. Sodium oxide. Metrics details. Blast Furnace Slag is a by product obtained in the manufacturing of Pig iron in the Blast furnace and is formed by the combination of earthy constituents of iron ore with lime stone flux. Mini blast furnaces (MBF) are generally viewed as miniature versions of the conventional large blast furnaces (BF). In this case, a smooth slag formation process, in- creased productivity and decreased fuel rate can be achieved. The typical blast furnace gas composition in volume is N 2 = 55.19%, CO = 20.78%, CO 2 = 21.27% and H 2 = 2.76% (Hou et al., 2011). Slag : Air-cooled blast furnace slag (ABS) What is ABS? Formed during the manufacture of iron, molten blast furnace slag is cooled and processed in three ways to form slag aggregates for different applications. Blast furnace slag varies in composition and physical structure depending on the method of cooling of the slag. Potential environmental impacts 15 8. GGBFS is divided into three classifications based on its activity index. In actual fact, this by-product is valuable and extremely versatile construction material. the top, to improve slag formation in the blast furnace. economy, since the blast furnace fuel rate increases and the productivity decreases. Blast furnace static simulation model - furnace thermal state - wind temperature - oxygen enrichment - wind humidity Charging material data - chemical composition - price Requirements: - pig iron type and composition - slag basicity - furnace output External input parameters Internal input parameters Ground granulated blastfurnace slag (GGBS) is the slag from iron producing blastfurnaces that is rapidly quenched in water and then ground into a powder. When mixed with water it will hydrate in a similar way to Portland cement. 1. The basicity B2 of primary slag of the pellet, bosh slag, tuyere slag and final slag will then be 1.0, 1.1, 0.9 and 1.2, respec-tively. It can also be referred as ‘GGBFS’ or ‘GGBS cement’ and the concrete which is made using GGBS is called ‘furnace concrete’ or ‘GGBS concrete’. Fig 1 Blast furnace slag and its processing. GROUND GRANULATED BLAST FURNACE SLAG. Key markets and production of BFS 5 3. formed in the BF slag. Abstract. In most commercially traded ores the other elements tend to be present only at much lower levels although there are some sources which … Anton Andersson 1, Hesham Ahmed 1,2, Lena Sundqvist Ökvist 1,3 & Bo Björkman 1 Metallurgical and Materials Transactions B volume 51, pages 2711 – 2723 (2020)Cite this article. 4. Those studied were alkali activated by liquid sodium silicate (SS) and sodium carbonate (SC). BFS versus the guiding principles 9 5. From the above two differences in composition compared with the Portland cement, would show changes in the hydration reaction as well as the hydration products that are given GGBFS. Blast Furnace Slag Specification (composition) Ground Granulated Blast Furnace Slag (PDF) Ground Blast Furnace Slag (PDF) Blast Furnace Slag Supplier. The water content is removed by demisters following the cleaning process. This gas is used for the furnace mills, in gas engines and for electricity and steam generation. For chemical uses, such as a raw material for manufacture of glass or mineral wool insulation and for agricultural applications, the chemical composition is quite important. Air-cooling . The chemical reactions occurring during the removal of impurities determine the chemical composition of the basic-oxygen-furnace slag [1, 3, 5]. By-Product During Manufacturing . Material composition and quality standards 13 7. The effects of fines and chemical composition of three types of ground granulated blast furnace slag (GGBFS) on various concrete properties were studied. 2.2. Process description 11 6. Blast furnace slag cement is the mixture of ordinary Portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement. Sulfur. The petroleum industry has a great interest in the use of blast furnace slag for converting drilling mud into suitable cement for well cementing operations for zonal isolation. The phase composition of cement hydration products is chiefly represented by tobermorite 1.13 nm. Blast Furnace Slag (BFS) results in production of GGBS which is a by- product of iron industry and have the potential to replace cement in concrete. Mini Blast Furnace and Iron making. 346 Accesses. 4) sieve. The use of blast furnace slag imparts cementing properties … Increased in-plant recycling and lower quality raw … Ground granulated blast furnace slag (GGBFS) is designated in ASTM C 989 and consists mainly of silicates and aluminosilicates of calcium. UK legislative position 6 4. In this article we […] 8 J. H. LIU et al. Applications. 4 sieve) in diameter to dense, sand-size grains passing a 4.75 mm (No. Production and Processing. Grade 80 has a low activity index and is used primarily in mass structures because it generates less heat than portland cement. The silicon and manganese levels in the hot metal and the recirculation of alkalis are also influenced by slag composition. Executive summary 1 1. Introduction 3 2. Calcium oxide. Blast furnace slag (BFS) A technical report on the manufacturing of blast furnace slag and material status in the UK. The slag fluidity in the BF affects softening-melting behaviour in the cohesive zone, permeability in the lower part of the furnace due to liquid hold-up in a dripping zone, liquid flow in the furnace hearth, and the ability of the drainage of the slag by a taphole. The tapping of blast furnace, also referred to sometimes as casting or drainage, is a process that removes hot metal and liquid slag from the blast furnace hearth. 2. Materials and Methods 2.1. Other elements in the slag are MnO, S, K2O, FeO and Na2O etc. satyendra; October 10, 2016; 0 Comments ; bell less top, cast house, cooling stave, furnace profile, gas cleaning plant, hearth, hot blast, hot blast stoves, Hot metal, MBF, slag, tuyeres, valves, Mini Blast Furnace and Iron making. It is a latent hydraulic product which can be activated with anyone- lime or Portland cement. Electric-Arc-Furnace (EAF) Process of Steelmaking and Slag Generation . Composition. Sampling of Slag Crust In the present paper, the slag crust samples were taken from a Chinese blast furnace with its volume of 2 650 m3. Production and composition. For every tonne of GGBS used in a concrete mix, the embodied CO 2 levels are reduced by around 900 kg compared to the use of one tonne of traditional Portland Cement. Blast furnace slag has a typical composition of: Silicon dioxide. Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. tion mechanism of slag crust in the blast furnace was pro-posed based on the phase characterization and theoretical analysis, which might provide new insights into the slag crust growth behavior. Ground granulated blast furnace slag is usually designated as ‘GGBS’. Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious properties. What is GGBFS? It is a by-product of the iron-making industry. 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. Granulated Blast Furnace Slag Granulated blast furnace slag is a glassy granular material that varies, depending on the chemical composition and method of production, from a coarse, popcornlike friable structure greater than 4.75 mm (No. The chemical composition of blast-furnace slag is a significant factor in the potential performance of granulated material in cementitious uses. Chemically it is similar to, but less reactive than, Portland cement (PC). ABS is a crystalline by-product produced by the solidification of molten blastfurnace slag. Present day technology of blast furnace tapping employs full pool practice. Blast furnace slag is composed of silicates and alumino silicates of lime . Iron production is via a continuous batch process with the iron and slag produced in the blastfurnace at a temperature around 1500ºC. : REACTION MECHANISM ANALYSIS OF THE TiO 2 IN VANADIUM - TITANIUM BLAST FURNACE SLAG METALURGIJA 59 (2020) 1, 7-9 Table 2 The area A EDS analysis/wt,% Area Fe C V Si A 90,69 6,33 2,30 … Flowability, setting times, compressive strength, efflorescence, and carbonation resistance and shrinkage were tested. Blast furnace slag mortar samples were prepared using both sodium silicate and sodium hydroxide solutions as activator. Additionally, sulphate resistance of 50% slag + 50% fly ash mixture activated with 10 m NaOH solution was evaluated. Aluminum oxides. Table 1 Blast furnace observation models Fig. Magnesium oxide. The chemical composition of slag from a given source varies within relatively narrow limits since raw materials charged into the furnace are carefully selected and blended. Alumina is usually present, though the levels can vary quite widely between sources. The major constituents of blast furnace slags are the four oxides CaO, MgO, SiO2 an Al2O3 and the sum of their concentrations usually exceeds 95 %. Physical Properties of Ground Granulated Blast Furnace Slag (GGBFS) Ground granulated blast furnace slag have a color nearly white in appearance. Iron oxides. In Fig. Introduction 10 million tons of blast furnace slag is produced in India annually as a byproduct of Iron and Steel Industry. Ground Granulated Blast Furnace Slag (GGBS) is a cement substitute that improves durability and also the environmental credentials of concrete mixes. Quenching process of molten slag by water is converting it into a fine, granulated slag of whitish color. Table1 The slag chemical composition/wt,% CaO SiO 2 V 2 O 5 TiO 2 MgO Al 2 O 3 S 28,98 26,34 0,3 22,5 7,57 13,86 0,45 Figure 1 The SEM of the slag sample. 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