title: Acidic leaching both of zinc and iron from basic oxygen furnace sludge.
abstract: During the steel production in the basic oxygen furnace (BOF), approximately 7-15 kg of dust per tonne of produced steel is generated. This dust contains approximately 1.4-3.2% Zn and 54-70% Fe. Regarding the zinc content, the BOF dust is considered to be highly problematic, and therefore new technological processes for recycling dusts and sludge from metallurgical production are still searched for. In this study the hydrometallurgical processing of BOF sludge in the sulphuric acid solutions under atmospheric pressure and temperatures up to 100 °C is investigated on laboratory scale. The influence of sulphuric acid concentration, temperature, time and liquid to solid ratio (L:S) on the leaching process was studied. The main aim of this study was to determine optimal conditions when the maximum amount of zinc passes into the solution whilst iron remains in a solid residue.
authors: Faculty of Metallurgy, Department of Non-ferrous Metals and Waste Treatment, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovak Republic.
authors: Zuzana Hoang
authors: ZH
authors: Trung
authors: Frantisek
authors: F
authors: Kukurugya
authors: Zita
authors: Z
authors: Takacova
authors: Dusan
authors: D
authors: Orac
authors: Martina
authors: M
authors: Laubertova
authors: Andrea
authors: A
authors: Miskufova
authors: Tomas
authors: T
authors: Havlik
mesh_terms: D004867:Equipment Design; D007501:Iron / Q000032:analysis*; D008956:Models, Chemical; D055095:Optics and Photonics; D010100:Oxygen / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction; D015032:Zinc / Q000032:analysis* / Q000737:chemistry
chemical_list: D012722:Sewage; D013464:Sulfuric Acids; D014874:Water Pollutants, Chemical; D007501:Iron; D015032:Zinc; C033158:sulfuric acid; D010100:Oxygen