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. An increase of its production results in more landfills. 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. Steelmaking slag can be used for desulphurization due to its high CaO, especially free CaO content. 25 0 obj<>stream Winter wheel/tires Blizzak 215/70R15 set of 4, on 15x7 steel rims $250 (Dobbs Ferry) pic hide this posting restore restore this posting. 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. Akinwumi concluded that steel slag can be used as a low cost soil modifier for use in subgrade stabilization. It appears in concrete, aggregate road materials, as ballast, and is sometimes used as a component of phosphate fertilizer. xÚb```a``’``d`¼¹‡Aˆ„€bL@YŽ†9Gl+—L``ø`odç V(f`ðaf`[À`Â`ÕÀÀ1Õ 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. Â0Dïûó&»1šî¹Bñ¨. Steel slag is currently utilized both to treat wastewater, and as a concrete aggregate. 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. Steel slag is used for dressing and for The major chemical components of the cement and steel slag are shown in … 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. Docksides, yards, other areas subject to heavy loads use steel slag for both sur- face and sub-ballast. Figure 1 shows the particle size distributions of the cement and steel slag powder. Approximately 40% of iron and steel slag products, and 60% of blast furnace slag, are used in cement. 0000001204 00000 n $ÄËÀë)¤™€ØˆxӁ4#Ï0 6­¯ 1. Steel slag has been used to construct pavements for nearly one hundred years. 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 … 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. 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. <<87D8BD350A36644CA288235141CED114>]>> The majority of the demand for these products comes from the field of cement. These materials must be source separated, and well-defined handling practices must be in place to avoid contamination of the steel slag aggregate. 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. 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. 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. startxref 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. The main uses of Slag are in construction, water treatment, agriculture, cementitious applications. Iron and steel slag products are used in a variety of areas where their unique characteristics are put to effective use. 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. 0000000637 00000 n The percentages of slag used as cement substitution were 10%, 20%, and 30% from total volume. $75. However, slag could be used to treat acid soils or acid mine drainage. Blast furnace slag is used in a variety of applications including structural concrete, mineral wool, and glass manufacture. 18 0 obj <> endobj The iron and steel slag used as aggregates for asphalt roads are iron and steel by-products. %PDF-1.4 %âãÏÓ endstream endobj 19 0 obj<> endobj 20 0 obj<> endobj 21 0 obj<>/ProcSet[/PDF/ImageB]/ExtGState<>>> endobj 22 0 obj<>stream Slag is defined as a waste material produced from iron ore smelting process in blast furnace. 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. 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. It is also successfully used as an aggregate for concrete. $500. trailer 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. Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers’ current waste footprint. 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. 0000000846 00000 n Environmentally friendly and reduced greenhouse gas emissions. 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