FLOTATION STUDY OF PRIMARY TAILING AND SECONDARY MIDDLING-TAILING FROM BATUBESI BELITUNG PRIMARY TIN ORE PROCESSING PLANT

• Main Author: Khasanah, Irawati
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72212
• Institution: Institut Teknologi Bandung

Tin metal is often used in various sectors, especially as a solder material or tinplate coating. Currently, most tin in Indonesia is produced from the processing of alluvial deposits. However, this deposit is predicted to be depleted in the next few years, and a new source of tin is needed for mining sustainability. Primary tin ore processing using gravity concentration is the solution to this problem. However, the product of gravity concentration still has low tin recovery and grade. This happens because a lot of tin is wasted on the tailings. Flotation concentration can be an alternative method for the recovery of tin tailing and middling. In this study, flotation experiments were carried out on primary tailing and secondary middling-tailing from the concentration of primary tin ore to increase the recovery of Sn and Sn grade. Flotation experiments were carried out on primary tailing and secondary middling-tailing. The primary tailing feed contains 0.37% Sn, while the secondary middling-tailing contains 1.3% Sn. Flotation experiments were carried out to study the influence of ore size fraction, pH, type, and concentration of collector on recovery and grade of Sn. Then, to study the kinetics of the flotation process on the best experimental results. There are three types of collectors used, namely DP-OMC-1167, DP-OMC-1474, and AERO 845 Promoter. Variation of the ore size fractions were varied on the values P80 149, 105, 75, and 37 ?m. Then, DP-OMC-1167 and DP-OMC-1474 were varied at pH 2.7, 2.9, and 3.5, while AERO 845 Promoter was at pH 3, 5, 7, and 9. The concentration of collectors using levels of 100, 200, 300, and 400 g/t for DP-OMC-1167 and DP-OMC-1474, while levels of 300, 400, 500, and 600 g/t for AERO 845 Promoter. The flotation product was then characterized using XRF. The data obtained were processed to determine the recovery of Sn and Sn grade. The optimum performance of primary tailing flotation was produced using AERO 845 Promoter with feed P80 75 ?m, pH 5, and a dose of 500 g/t. this experiment resulted in Sn recovery and grade of 39.49% and 0.82%. Meanwhile, the optimum performance of secondary middling-tailing flotation when using AERO 845 Promoter with P80 37 ?m, pH 5, and a dose of 400 g/t. This experiment resulted in Sn recovery and grade of 76.44% and 2.71%. In the best experimental results of primary tailing flotation and secondary middling-tailing, the cumulative Sn recovery increased with increasing time and the cumulative Sn grade did not decrease significantly.