STUDY OF MAGNETIC CONCENTRATION PROCESS OF PRIMARY TAILINGS AND SECONDARY MIDDLING - TAILING FROM BATUBESI PRIMARY TIN ORE MINERAL PROCESSING

• Main Author: Admirosadi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72208
• Institution: Institut Teknologi Bandung

Tin is a common metal in everyday life with its flexible and easy to form makes tin widely applied in various sectors. Primary tin ore is needed for further processing due to the depletion of high-grade tin ore reserves. Primary tin ore which processed using gravity concentration with a rocking table still has a low SnO2 content. In this study, further processing of primary tailings and secondary middling – tailing using magnetic concentrations was carried out to separate valuable minerals from impurities and help the overall plant recovery. A series of magnetic concentration experiments have been carried out on samples of primary tailings and secondary middling tailings of tin ore to study the effect of variations in feed size P80, magnetic intensity, and rotor speed on recovery and Sn gain. Experiments were carried out with variations in P80 feed sizes of 149, 105, 74, and 37 ?m combined with variations in magnetic intensity of 500, 2000, 3500, and 5000 Gauss then the best variations were continued with rotor speed variation trials of 30, 60, and 120 RPM. The percentage of Sn in various variations was determined by X-Ray Fluorescence (XRF) analysis. From the percent Sn data obtained, the recovery and enrichment ratio were determined. The highest assay and percent Sn recovery for primary tailings, namely 0,4% and 68,27% were obtained from experiments with feed sizes P80 149 ?m, 5000 Gauss, and 60 RPM. Increasing the size of the P80 feed from 149 to 37 ?m resulted in a decrease of Sn recovery but an increase in Sn gain. An increase in magnetic intensity from 500 to 5000 G resulted in a decrease of Sn recovery and an increase in Sn content. The highest assay and Sn recovery for secondary middling tailings, namely 3,1% and 49,68% were obtained from experiments with feed sizes P80 74 ?m, 5000 Gauss, and 60 RPM. Increasing the size of the P80 feed from 149 to 37 nm resulted in a decrease of Sn recovery but an increase in Sn gain. An increase in magnetic intensity from 500 to 5000 G resulted in a decrease of Sn recovery and an increase in Sn content. Keywords: Primary tin ore, magnetic concentration, P80