Essays about: "pickling process"

Showing result 6 - 8 of 8 essays containing the words pickling process.

  1. 6. Neutralizing acidic wastewater from the pickling process using slag from the steelmaking process : A pilot study in project "Neutralsyra"

    University essay from KTH/Materialvetenskap

    Author : Julia Brännberg Fogelström; Amelie Lundius; Hedda Pousette; [2017]
    Keywords : Slag; Neutralization; Lime; Lime Concentrate; Acidic wastewater; pH; Landfill; Byproducts; Slagg; Neutralisering; Kalk; Kalkkoncentrat; Surt avfallsvatten; pH; Deponi; Restprodukter;

    Abstract : Properties and origins of two byproducts from steelmaking plants, slag and acidic wastewater, are investigated in this report. The slags' suitability as neutralizing agents of acidic wastewater from the pickling process, with regard to amount of slag required and the environmental impact of the produced byproducts is investigated. READ MORE

  3. 7. Acid neutralization using steel slags : Adsorption of fluorides in solutions using AOD slags

    University essay from KTH/Materialvetenskap

    Author : Jesper Larsson; [2015]
    Keywords : acid neutralization; AOD slag; fluoride adsorption; syraneutralisering; AOD slagg; fluoradsorption;

    Abstract : Surface treatment processes of stainless steel, such as pickling, produces acidic waste water consisting of Na⁺, Cl⁻, F⁻, NO⁻3, SO42-, PO43-, Fe3+, Cr6+ and Ni2+. At Sandvik ABs steel works in Sandviken, this waste water is treated and neutralized using slaked lime before being released into the lake Storsjön. READ MORE

  4. 8. Treatment of Spent Pickling Acid from Stainless Steel Production : A review of regeneration technologies with focus on the neutralisation process for implementation in Chinese industry

    University essay from KTH/Industriell ekologi

    Author : Lena Dahlgren; [2010]
    Keywords : acid regeneration; acid neutralisation; pickling waste water treatment; environmental effects of stainless steel production; nitrate reduction; High Density Sludge process; HDS process; syraåtervinning; neutralisering; behandling av avlopp från betning; denitrifiering; miljöeffekter av stålproduktion; High Density Sludge process; HDS;

    Abstract : Pickling is a unit operation within stainless steel production, which means treating the steel with hydrofluoric acid (HF) and nitric acid (HNO3), also called mixed acid. The whole process generates waste water streams which have to be treated before released to recipient. READ MORE