THE EFFECT OF WATER TYPE, FROTHER DOSAGE, AND COLLECTOR DOSAGE ON THE FLOTATION OF FRESH ORE TYPE SULFIDE COPPER ORE AT PT AMMAN MINERAL NUSA TENGGARA

• Main Author: Imaduddin Naufal, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85254
• Institution: Institut Teknologi Bandung

PT Amman Mineral Nusa Tenggara (AMNT) processes copper sulfide ore using flotation concentration methods. Two types of ore are processed: fresh ore and oxidized ore. Fresh ore offers the advantage of achieving higher copper recovery rates due to its low oxidation level and relatively high copper content. However, the use of different water types (seawater, mixed water, and acidic mine water) as processing media presents challenges due to their varying characteristics and effects on recovery. The addition of reagents such as collectors and frothers, with carefully adjusted dosages, is required to enhance copper recovery. This study focuses on optimizing copper recovery from fresh ore by examining key operational parameters, including collector dosage, frother dosage, and the type of flotation water media used. A series of flotation experiments were conducted to investigate the effects of varying dosages of the collector potassium amyl xanthate (PAX) and frothers (mixed alcohol), across different flotation water media. The experiments utilized three types of flotation media: acidic mine water, seawater, and mixed water (a 50:50 combination of acidic mine water and seawater). PAX dosages of 2, 8, and 14 g/t, and frother dosages of 10, 30, and 50 g/t, were tested. The experiments began with sample preparation, homogenization & splitting, determining grinding time for P80 212 ?m, followed by bulk flotation tests in five stages. The dry weight of the flotation products was measured, and the Cu content was analyzed using Atomic Absorption Spectroscopy (AAS). The results showed that, when using seawater as the flotation medium, the addition of PAX and frother displayed stability in copper recovery. The optimal conditions, yielding a copper recovery of 97.23%, were achieved with 8 g/t of PAX and 30 g/t of frother. In the mixed water medium, increasing the dosages of PAX and frother generally improved copper recovery, with the highest recovery of 96.75% obtained using 14 g/t of PAX and 10 g/t of frother. In the acidic mine water medium, the addition of PAX and frother positively impacted copper recovery, with the highest recovery of 95.58% achieved using 14 g/t of PAX and 50 g/t of frother.