Effects of operating Parameters on Recovery of non-floatable Coal by Column flotation

摘要

In this research paper, Investigation has done for comparison about mechanical flotation and Column flotation cell, the similar properties were identified among mechanical flotation cell and column flotation cell for fine coal processing. Moreover the maximum values of operational variables are identified, those were essential to select in column flotation for desirable separation process. Therefore the frother height, Air flow rate, slurry flow rate, collector dosage, the wash water rate, the airflow rate and the pulp rate. The coal sample was collected from a classifying cyclone overflow stream consisting of nominally -500 μm material. The Proximate analyses of the coal sample were found to be 44.40%, 18.70%, 28.60% and 0.50%, respectively. Comparison of the column and mechanical flotation results indicated that column flotation was considerably more efficient than mechanical flotation for fine coal cleaning. High frother thickness and wash water addition during column flotation made it possible to obtain cleaner coals. The column flotation produced 15.60% product ash with 49.92% of clean coal and combustible recovery of 80.15%.