Yazar "Ayhan F.D." seçeneğine göre listele

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    Öğe
    Concentration of kyanite ore from bayramalan (bitlis) region
    (2004) Ayhan F.D.; Bayat O.; Akar A.
    In this study, the upgrading studies of Bayramalan (Bitlis) kyanites were carried out using shaking table and flotation methods. First, the ore characteristics of the kyanite were determined and then the effects of operating parameters of shaking table such as tilt angle, stroke and speed on the separation were investigated for -0.3+0.1 mm size fraction. Shaking table tests were also applied to -0.5+0.3, -0.3+0.2 and -0.2+0.1 mm size fractions at the best operating conditions obtained for -0.3+0.1 mm size fraction. The minus 0.1 mm size fraction was processed only by flotation. The concentrates obtained at best conditions contain Al 2O 3 higher than 54% and the recovery of Al 2O 3 is higher than 70%.
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    Öğe
    Deashing of Sirnak Asphaltites by Froth Flotation Method
    (2003) Ayhan F.D.; Abakay H.; Kahraman F.
    In this study, the possibility of cleaning Sirnak asphaltite by froth flotation was investigated. For this purpose, laboratory tests were carried out in order to investigate the effects of grinding time, pulp density, pH, collector amount, depressant amount, frother amount on the overall performance of the flotation process. The best conditions determined were as follows: pulp density: 5 %, pH: 8, collector amount: 0 g/t, depressant amount: 150 g/t and frother amount: 100 g/t. As a result, applying flotation method to Sirnak asphaltite; a clean asphaltite assaying 32,95 % ash with 76,61 % combustible yield was obtained.
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    Öğe
    Investigation of the washability characteristics of Eskişehir- Mihaliççik lignite
    (2008) Ayhan F.D.; Abakay Temel H.
    In this study, the washability characteristics of Eskişehir- Mihaliççik lignite was investigated. Experimental studies were performed with the lignite samples taken form underground lignite fields and surface lignite field in Eskişehir-Mihaliççik, Turkey. Firstly, float-sink tests were made on -50+20 mm, -20+4.75 mm ve -4.75+0.5 mm size fractions. After, evaluation of the washability properties was made by using "Washability number" and "Near gravity material index" and the obtained results were presented.