INITIAL STUDY OF RECOVERY LEAD FROM DUST S-ESP FURNACE PT. SMELTING GRESIK THROUGH LEACHING DUST IN SULFURIC ACID AND REDUCTION OF LEACHING RESIDUE USING COKE PROCESS

• Main Author: HARTANTO , TRI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11532
• Institution: Institut Teknologi Bandung

PT. Smelting is smelter and refinery copper company, Which processing concentrate from PT. Freeport Indonesia and PT. Newmont Nusa Tenggara. PT. Smelting Gresik using Mitsubishi process to process concentrate to produce anode copper. This process using three furnace which work continuously, Smelting Furnace, Slag Cleaning Furnace, and the third furnace is converting furnace. Input of S-Furnace not only concentrate but also dust from S-furnace which recycle from previous process, because in dust S-furnace still include copper in the high percentage 16%Cu. Now PT. Smelting have a problem increasing content of impurities especially Pb in anode copper impact from high content of Pb in dust S-furnace which recycle to S-Furnace.<p>The aim of this research is to recover Pb in the dust S-furnace through reduction process using a coke. Variable-variable which observed in this experiment is mass ratio of Na2CO3 and residue, mole ratio of coke and Pb in residue, process temperature, and retention time. In this experiment using variation of mass ratio of Na2CO3 and residue is 0; 0.0125; 0.025; 0.0375; 0.05; and 0.1. mole of ratio coke and Pb in residue is 1/1, 2/1, 3/1, dan 4/1. With process temperature 800oC, 900oC, 1000oC, 1100oC, and 1180oC, and process time is from 30', 60', 90', 120', 150', 180', until 210'.