In the present study, the application of table type air separators was investigated on three lignite samples and a hard coal sample collected from several regions in Turkey. The Yenikoy lignite sample was used to determine optimum test conditions. These test conditions were used to study Soma, Corum lignite, and Zonguldak hard coal samples with reference to feed rate, riffle height, table frequency, and table slope. Results were analyzed to determine calorific values and ash contents of clean coal and tailing samples. It is concluded from the study that the table-type air separator can be used for the Turkish coal with high-separation efficiency.

In the present study, effects of several operating parameters on the separation efficiency of mica from feldspar by spiral concentrator were investigated. For this purpose, an albite ore containing mica was treated in a full scale Reichert spiral (model HG7) under various test conditions. During the study, particle size distribution, solid contents of the feed, feedrate and splitter position were changed. It was observed that in a spiral concentrator mica could be separated from feldspar owing to its laminar morphology. Accordingly, it was found that particle size and solid contents had significant effect on the separation. Best results were obtained with feed solid content of 15% by weight for the particle size fraction of 2212z74 mm. In line with this, Fe 2 O 3 content, which was 0 . 71% in the feed, decreased to 0 . 07% in concentrate.

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