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Demineralization of Sirnak asphaltites by flotation

Hicyilmaz, C.
Altun, Naci Emre
Demineralization of Sirnak asphaltite by flotation method was investigated. The effect of different parameters on the process such as particle size, collector type and amount, pH, pulp density, flotation time and cleaning of rougher flotation product was studied. Treatment with collector Accoal 18 (Cytec Ind. Inc.) at natural pH gave the highest recovery of combustibles and low ash yield. Flotation at pulp density 10% solid by weight and 2-min residence time gave the best result. As a result of single-stage flotation, ash content of asphaltite was reduced from 44.86 to 24.58%, and 71% of combustibles were recovered. Total sulfur content was reduced from 5.53 to 1.89%, and activation energy from 46.76 to 29.84 kJ/mol, respectively. Calorific value of asphaltite was increased from 4,380 to 6,070 kcal/kg.