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  2. The use of slag includes12345:
    • Floating on the surface of molten metal to protect it from oxidation and keep it clean.
    • Forming a coarse aggregate used in certain concretes.
    • Being used as a road material and ballast.
    • Serving as a source of available phosphate fertilizer.
    • Permitting removal of impurities from the melt during metallurgical smelting.
    • Allowing exchange reactions with liquid metal to control the process.
    • Treating acid soils or acid mine drainage.
    • Removing slag after welding for inspection, visual appearance, subsequent weld passes, and surface cleaning.
    Learn more:
    Slag floats on the surface of the molten metal, protecting it from oxidation by the atmosphere and keeping it clean. Slag forms a coarse aggregate used in certain concretes; it is used as a road material and ballast and as a source of available phosphate fertilizer.
    www.britannica.com/technology/slag
    Slag is a by-product of the metallurgical smelting process. Slag has a double role: it permits removal of impurities, known as gangue, from the melt by forming oxides. It also allows exchange reactions with the liquid metal, permitting control of the process in order for the desirable elements to stay in the melt while the others are removed.
    www.thermofisher.com/blog/metals/slag-from-by-pr…
    Although the construction industry does use some slag as an aggregate, most is simply discarded. However, slag could be used to treat acid soils or acid mine drainage. Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers’ current waste footprint.
    www.usgs.gov/news/science-snippet/slag-what-it-g…

    Because slag doesn’t add to weld strength or protection after the welding process is complete, welders remove the slag to:

    • Be able to clearly inspect the weld area
    • For a more pleasing visual appearance
    • To make subsequent weld passes
    www.twi-global.com/technical-knowledge/faqs/wha…
    Slag is the collection of compounds that are removed. In many smelting processes, oxides are introduced to control the slag chemistry, assisting in the removal of impurities and protecting the furnace refractory lining from excessive wear.
    www.wikiwand.com/en/Slag
     
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    Slag - Wikipedia

    The general term slag may be a by-product or co-product of smelting (pyrometallurgical) ores and recycled metals depending on the type of material being produced. Slag is mainly a mixture of metal oxides and silicon dioxide. Broadly, it can be classified as ferrous (co-products of processing iron and … See more

    Slag is usually a mixture of metal oxides and silicon dioxide. However, slags can contain metal sulfides and elemental metals. It is important to note, the oxide form may or may not be present once the molten slag … See more

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    Slags can serve other purposes, such as assisting in the temperature control of the smelting, and minimizing any re-oxidation of the final liquid … See more

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    In nature, iron, copper, lead, nickel, and other metals are found in impure states called ores, often oxidized and mixed in with See more

    There are three types of slag: ferrous, ferroalloy, non-ferrous slags, which are produced through different smelting processes. See more

    Slags are transported along with slag tailings to "slag dumps", where they are exposed to weathering, with the possibility of leaching of toxic elements and hyperalkaline runoffs … See more

    • Dimitrova, S.V. (1996). "Metal sorption on blast-furnace slag". Water Research. 30 (1): 228–232. Bibcode:1996WatRe..30..228D See more

     
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  5. Slag-What is it Good for? | U.S. Geological Survey

    Slag is the byproduct of metal smelting or refining, but it can also have beneficial uses for neutralizing acid mine drainage and absorbing excess phosphate in water. Learn how USGS research shows that slag can be an environmental …

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  7. Slag: From By-product to Valuable Construction Material

    Jul 29, 2014 · Slag is a mixture of silica, lime, and other compounds that is formed during the smelting process. It can be recycled and reused in various construction materials, such as cement, concrete, insulation, and tiles, after …

  8. Slag | Iron Smelting, Steelmaking, Refining | Britannica

    Slag is a by-product of smelting, welding, and other metallurgical and combustion processes. It consists of mixed oxides, ash, and products of reactions with furnace linings and fluxing substances. Slag has various …

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    Aug 21, 2014 · Steel Slag is a byproduct of the iron and steel recycling process, produced by removing the molten impurities from the surface of electric arc furnace smelting pots. The molten slag is slowly cooled by a water mist until …

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