Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/395
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Conference Object Citation - Scopus: 2Leaching of Yahyali Non-Sulphide Pb-Zn Flotation Tailing Using Organic Acids(Baski, 2019) Hussaini, Shokrullah; Kursunoglu, Sait; Kaya, MuammerThe laboratory scale leaching of Kayseri-Yahyali non-sulphide lead (Pb)-zinc (Zn) flotation tailing using two organic acids was experimentally investigated. The effect of citric and oxalic acid on the dissolution of Zn, Pb, iron (Fe) and arsenic (As) was individually investigated under the following conditions: citric or oxalic acid concentration of 0.5-1.0M, temperature of 60-80°C and leaching time of 30-180 min. at 1/10 solid-to-liquid (S/L) ratio. 90.1% Zn dissolution was achieved using 0.5 M citric acid at 80°C leaching temperature for 180 min leaching time. The Fe, Pb and As dissolutions were determined as less than 20% under the conditions tested. 95.5% Fe and 68.8% As were removed from the flotation tailing along with less than 5% of Zn and Pb using 1.0 M oxalic acid for 180 min. leaching time at 60°C leaching temperature. It was found that citric acid is more prominent than oxalic acid for the selective leaching of zinc from the flotation tailing whereas a substantial amount of iron and arsenic removal can be achived by oxalic acid leaching. The use of NaCl along with citric acid was not useful for higher Zn dissolution. Based on the experimental results, an appropriate process will be improved for the selective leaching of valuable metals from the Pb-Zn non-sulphide flotation tailing in the near future. © 2020 Elsevier B.V., All rights reserved.Article Citation - WoS: 6Citation - Scopus: 6Concentration Study of a Specularite Ore via Shaking Table, Reverse Flotation, and Microwave-Assisted Magnetic Separation(Taylor & Francis inc, 2022-11-03) Al-Dhubaibi, Ammar Mahdi Ahmed; Vapur, Huseyin; Top, Soner; Sivrikaya, OsmanDespite the difficulties in pelletizing specularite-type refractory iron ores, the utilization of these resources is indispensable for the steel industry due to the increasing need for iron. This study investigated Fe recovery from a refractory iron ore using gravity separation, reverse flotation, and two-stage magnetic separation. Tilt angle and particle size had a significant effect on the grade and recovery of concentrates in shaking table tests. Gravity concentration at optimum conditions resulted in an iron concentrate with 64.47% Fe grade and 90.73% Fe recovery. In the reverse flotation tests, the frother and depressant substantially affected the Fe grade of concentrates while the collector influenced the Fe recovery. A 90% Fe recovery with 64.69% Fe grade was obtained within optimum flotation conditions. The Fe grades were raised to >67.5% in products after the first magnetic separation. The tailings of the first magnetic separation were subjected to the second magnetic separation after microwave-assisted roasting to increase the magnetic susceptibility. In the second magnetic separation, a concentrate containing 66.06% Fe was separated from the microwave-roasted non-magnetic material with 82.23% Fe recovery. To the best of our knowledge, the microwave-roasting method has been applied to a specularite-type refractory iron ore for the first time.