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. 18 8 The pile of steel slag occupies a huge area of arable land, and causes environmental pollution; moreover, 7%-15% steel can be recycled from steel slag. Steel slag is a by-product in the production of steel. Slags are nonmetallic byproducts of many metallurgical operations and consist primarily of calcium, magnesium, and aluminum silicates in various combinations.   Iron and steel slags are coproducts of iron and steel manufacturing.    In the production of iron, the blast furnace is charged with iron ore, fluxing agents, usually limestone and dolomite, and coke as fuel and the reducing agent.   The iron ore is a mixture of iron oxides, silica, and alumina.   From this and the added fluxing agents molten slag and iron are formed.  The physical characteristics such as density, porosity, and particle size, are affected by the cooling rates and chemical composition.   Depending on the cooling method, three types of iron slag are produced— air cooled, expanded, and granulated— that have different types of applications. xref $500. 0000000456 00000 n Celik and Nalbantoglu studied the effect of ground granulated blast furnace slag (GGBS) on the control of swell associated with lime stabilized sulphate bearing soil. Slag processing GGBS; How Is Slag Used? Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers’ current waste footprint. As a result of growing environmental awareness, iron and steel slag is highly regarded as a recycled material that can reduce impacts on the environment due … Steel slag is currently utilized both to treat wastewater, and as a concrete aggregate. Slag is a byproduct of metal smelting, and hundreds of tons of it are produced every year all over the world in the process of refining metals and making alloys.Like other industrial byproducts, slag actually has many uses, and rarely goes to waste. 0000000846 00000 n Blast furnace slag is used in a variety of applications including structural concrete, mineral wool, and glass manufacture. Characteristics and Uses of Steel Slag in Building Construction focuses predominantly on the utilization of ferrous slag (blast furnace and steel slag) in building construction.. %%EOF Coal Slag – is generally used paint, rust, and scale have to be removed from steel, such as car/truck frames, tanks, heavy machinery, farm equipment, etc. Steel slag may contain free lime (CaO or MgO) that may cause the slag to be expansive or cause differential movement when used as a base. Approximately 40% of iron and steel slag products, and 60% of blast furnace slag, are used in cement. %PDF-1.4 %âãÏÓ The percentages of slag used as cement substitution were 10%, 20%, and 30% from total volume. Slag is defined as a waste material produced from iron ore smelting process in blast furnace. Iron and steel slag products are used in a variety of areas where their unique characteristics are put to effective use. $ÄËÀë)¤™€ØˆxӁ4#Ï0 6­¯ Tata Steel IBMD is one of the leading suppliers of GGBS and the product has been used in construction of many iconic structures in India. Â0Dïûó&»1šî¹Bñ¨. a) Steel Slag The phosphorus content of BOF slag is too high to be used in ironmaking & steelmaking process some of the successful means of utilization are described below. Akinwumi concluded that steel slag can be used as a low cost soil modifier for use in subgrade stabilization. Although the construction industry does use some slag as an aggregate, most is simply discarded. $75. 0 The main uses of Slag are in construction, water treatment, agriculture, cementitious applications. A study on wet flue gas desulphurization with steelmaking slag powder has shown that by a reasonable design and suitable operation, the steelmaking slag used … The X-ray diffraction (XRD) patterns of the steel slag are shown in Figure 2. Slag cement, a byproduct of steel-making, enhances the traditional concrete benefits of strength and durability while offering reductions in waste, energy use and greenhouse gas emissions. Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. Slag processors may handle a variety of materials such as steel slag, ladle slag, pit slag, and used refractory material to recover steel metallics. 0000001128 00000 n <<87D8BD350A36644CA288235141CED114>]>> The Ground Granulated Blast Furnace Slag (GGBS) is obtained by grinding blast furnace slag in water or steam. Slag use is subject to strict regulations and standards. Steelmaking slag can be used for desulphurization due to its high CaO, especially free CaO content. Our slag cement CEMSlag TM is a hydraulic cement material created when granulated blast-furnace slag from the steel manufacturing process is ground to a fineness suited for concrete production. Steel slag is commonly used to cover driveways, to fill potholes, repair farm lanes, residential entrances, or yards.Steel slag is not just good for driveways, it is also used by homeowners as a landscaping stone in back yards around a pool area or patio. 0000001204 00000 n Steel slag, an unavoidable by-product in iron and steel production, may soon finds its way into agricultural land as soil nutrient, potentially cutting down India’s dependence on fertiliser imports. 0000000637 00000 n 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. The steel slag is used as a secondary cementitious binder, or aggregates for road … startxref Steel is not recommended for use in rigid confined applications – such as concrete aggregate, base or fill under structures or floor slabs, or backfill against structures or bridge abutments. Steel slag has been used to construct pavements for nearly one hundred years. Steel slag is residue from the steelmaking process, made of minerals like silica, alumina and titanium from iron sand, and combinations of calcium and magnesium oxides. Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. An increase of its production results in more landfills. 18 0 obj <> endobj Steel slag can also be used to absorb contaminants like phosphate, magnesium, iron, calcium, silica and aluminium in the wastewater treatment process, but loses its effectiveness over time. The iron and steel slag used as aggregates for asphalt roads are iron and steel by-products. The most common use is as an aggregate in the manufacture of asphalt. 1. Steel slag is used for dressing and for xÚb```a``’``d`¼¹‡Aˆ„€bL@YŽ†9Gl+—L``ø`odç V(f`ðaf`[À`Â`ÕÀÀ1Õ The major chemical components of the cement and steel slag are shown in … The majority of the demand for these products comes from the field of cement. 0000000016 00000 n Subscribe to receive an email notification when a publication is added to this page. Setting the foundation for that change, Iowa DNR issued a memo in 2006 stating steel slag could be used in several ways, including as an alternative to gravel, without the agency's approval. slag (GGBFS). Today, iron and steel slag is used in many fields where its unique characteristics can be put to effective use. 25 0 obj<>stream Environmentally friendly and reduced greenhouse gas emissions. Winter wheel/tires Blizzak 215/70R15 set of 4, on 15x7 steel rims $250 (Dobbs Ferry) pic hide this posting restore restore this posting. However, slag could be used to treat acid soils or acid mine drainage. H‰ŒÁ trailer endstream endobj 19 0 obj<> endobj 20 0 obj<> endobj 21 0 obj<>/ProcSet[/PDF/ImageB]/ExtGState<>>> endobj 22 0 obj<>stream The steel slag used was the converter steel slag with 1.5% f-CaO (by mass). Almost all GGBFS is used as a partial substitute for portland cement in concrete mixes or in blended cements. Steel slag can also be used to absorb contaminants like phosphate, magnesium, iron, calcium, silica and aluminum in the wastewater treatment process, but loses its effectiveness over time. It contains 0.1% or less silica, is moisture free and is best used for: rust removal, heavy scale removal, paint and coatings removal on heavy-gauge steel Depending on the used production technology, the steel slag can be divided into a basic oxygen steel slag, an electric arc furnace slag and a ladle furnace slag (De Brito and Saika, 2013). These materials must be source separated, and well-defined handling practices must be in place to avoid contamination of the steel slag aggregate. It appears in concrete, aggregate road materials, as ballast, and is sometimes used as a component of phosphate fertilizer. 0000000717 00000 n Slag is primarily used in the cement and construction industries, and largely in … Ferrous slag is currently underutilized. favorite this post Dec 27 2004 15" Toyota Corolla/Matrix OEM Wheels $500 (YONKERS) pic hide this posting restore restore this posting. Figure 1 shows the particle size distributions of the cement and steel slag powder. Full details of the specific properties and applications for each of the types of slag can be found on the pages as follows: Air-cooled Blast Furnace Slag (ABS) Air-cooled Basic Oxygen Steel Slag (BOS) The slag was derived from Research Center for Mineral Technology located in Tanjung Bintang Lampung Selatan with particle size of 80,100, and 120 mesh. It is also successfully used as an aggregate for concrete. 0000000935 00000 n In the production of iron, the blast furnace is charged with iron ore, fluxing agents, usually limestone and dolomite, and coke as fuel and the * Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. This process leads to a glassy, granular product that is then dried and ground into a fine powder. Steel slag is highly resistant to change by wetting and drying, freezing and thawing, extreme changes in temperature and chemical attack. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Historical Statistics for Mineral and Material Commodities in the United States, Iron and Steel Statistics and Information, Iron and Steel Scrap Statistics and Information. 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). Iron and steel slags are coproducts of iron and steel manufacturing. Docksides, yards, other areas subject to heavy loads use steel slag for both sur- face and sub-ballast. Slags are nonmetallic byproducts of many metallurgical operations and consist primarily of calcium, magnesium, and aluminum silicates in various combinations.