Recovery of colemanite from tailing using a Knelson concentrator
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Emet Boron Works, Eti Mine Works General Directorate, 43700 Emet, Kutahya, Turkey
Mehmet Savas   

Emet Boron Works, Emet Boron Works, Emet, 43700 Kutahya, Turkey
Publication date: 2016-06-01
Physicochem. Probl. Miner. Process. 2016;52(2):1036–1047
Tailing from colemanite concentrators in Emet Boron Works contains significant amounts of boron and cause potential environmental problems. Therefore, the recovery of colemanite from these tailings is imperative to ensure no pollution of the environment. In addition, the tailings also have economic importance as a secondary resource due to their high content of B2O3. This study was undertaken to investigate the possibility of recovering colemanite from tailings using a Knelson concentrator. After samples in size of -1 mm and 0.5 mm were obtained from tailings (-3 mm) by comminution, these three different samples were placed into a Knelson concentrator. In addition to particle size, the effects of fluidization water velocity and bowl speed on the performance of the enrichment process were examined. A concentrate with a B2O3 content of 34.2% was produced with a recovery of 78.3% from tailings with a B2O3 content of 24.8%. Increasing the bowl speed improved the B2O3 recovery. Increasing the fluidization velocity or reducing the particle size adversely affected the recovery percentage. The enrichment process also permitted the removal of any residual As and Fe.