STUDY OF GRAVITY CONCENTRATION USING SHAKING TABLE ON PRIMARY TIN ORE TYPES OF OXIDE CLAY FROM BATU BESI, BELITUNG

• Main Author: Ariq Rachmananda, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49095
• Institution: Institut Teknologi Bandung

Tin consumption in the world is indeed increasing. According to International Tin Association data, consumption in 2018 increased by 2.5%. One of the developments carried out is to conduct land mining in the Batu Besi area, Belitung. The type of tin ore found in land mining has different characteristics from the alluvial tin ore that is usually processed. One of the ore types is oxide clay. In this study, gravity concentration of oxide clay tin ore was carried out to determine the effect of feed size fraction, initial treatment of magnetic concentration, and continued gravity concentration of stage one and stage two middling. Ore preparation is carried out by sifting to produce fractions of -50 +100#, -100 +270#, and -270#. Gravity concentration is carried out with variations in feed size (-50 +100#, -100 +270#, and -270#), variations in magnetic concentration treatment (without magnetic concentration treatment, low intensity magnetic concentration treatment, high intensity magnetic concentration treatment). Gravity concentration is continued by processing middling stages one and two. Optimal results in the fraction of the feed size -50 +100# with content of Sn 2.32%, recovery of Sn 15.25%, and enrichment ratio of 4.68. Optimal results in treatment of high intensity magnetic concentrations with content of Sn 3.04%, recovery of Sn 5.41%, and enrichment ratio of 3.84. Gravity concentration of middling stages one and two for variations in feed size give the same optimal results in the feed size of -50 + 100# with content of Sn 2.08% and 1.02%, recovery of Sn 13.49 % and 1.25%, and enrichment ratios of 4.16 and 1.86. Whereas for variations in magnetic concentration treatment, the largest recovery of Sn in the first stage middling processing is in the low intensity magnetic concentration pathway of 5.34%. However, for content of Sn content and enrichment ratio, the greatest value obtained in high intensity magnetic concentration is 3.26% and 4.17. Gravity concentration middling stage two variations of the magnetic concentration treatment gives optimal results in the treatment path of high intensity magnetic concentration with content of Sn 3.19%, recovery of Sn 2.10%, and enrichment ratio of 3.25. Gravity concentration carried out in three stages produced the highest value of Sn percentage gain in the with a feed size of -50 + 100 # and without a magnetic concentration treatment of 25.46%. As for the content of Sn and enrichment ratio, the highest results obtained in the a feed size of -270 # and treatment of high intensity magnetic concentrations of 3.11% and 6.89.