BENEFICIATION STUDY OF OXIDE PRIMARY TIN ORE FROM BATUBESI BELITUNG USING FLOTATION PROCESS

• Main Author: Natanael Turangan, Hizkia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72824
• Institution: Institut Teknologi Bandung

The mining and processing of secondary tin ore by PT Timah Tbk. has been going on for more than half a century, resulting in depleted secondary tin ore reserves. The utilization of primary tin deposits needs to be carried out by PT Timah Tbk. to maintain the sustainability of tin metal production. One of the areas where there are primary tin deposits is the Batubesi area, Damar District, East Belitung Regency with iron-bearing minerals as the main mineral. To increase tin grade, a flotation process can be carried out, so it is necessary to see the response of tin levels and recovery. Primary tin ore flotation concentration experiments were conducted using a Denver flotation cell at feed P80 sizes of 38, 75, 105, and 149 microns. The collectors used were all three sulfosinnamate-based, viz: DP-OMC-1167, and DP-OMC-1474 from BASF, and AERO 845 Promoter from Solvay. The regulator used in the DP-OMC-1167 and DP-OMC-1474 collectors is H2SiF6, while the AERO 845 Promoter collector uses Na2SiF6. The first variation starts by determining the best Sn content and recovery at feed sizes with P80: 149 ?m, 105 ?m, 75?m, and 38 ?m using DP-OMC-1167 and DP-OMC-1474 collectors at pH 3.5 with a collector dose of 200 g/ton, and AERO 845 Promoter collector and pH 5 and with a collector dose of 500 g/ton. After obtaining concentrate and tailings from the experiment, the results were analyzed using XRF-Benchtop. The experiment continued by determining the best pH from several pH variations, namely: 2.7, 2.9, and 3.5 for DP-OMC-1167 and DP-OMC-1474, and pH 3, 5, 7, 9 for the Solvay collector. After obtaining the optimum variables of feed P80 size and pH of each collector, the experiment was continued to determine the best collector dosage of 100, 200, 300, 400 g/ton for DP-OMC-1167 and DP-OMC-1474 collectors, and collector dosage of 300, 400, 500, 600 g/ton for AERO 845 Promoter collector. The product of flotation concentration was analyzed using XRF-Benchtop to see the tin content in each product. The initial Sn content in oxide type primary tin ore is 0.29%. In the flotation concentration of oxide type primary tin ore, Sn recovery tends to increase with the fineness of the feed P80 size while the highest content is at -105 +75 ?m size. In the pH variation, the more acidic the flotation atmosphere, the better the Sn content and recovery. The collector dosage used in the experiment gave the results that the higher collector dosage generally increased Sn recovery but decreased Sn content. The optimum variable for collector dosage was 400 g/ton for DPOMC- 1167, 300g/ton for DP-OMC-1474 collectors, and 500 g/ton for AERO 845 Promoter collectors. The final yield obtained in this study was 0.62% Sn with a yield of 35.60%Sn.