GOLD RECOVERY EFFECTIVENESS STUDY ON FLOTATION OF LOW SULFIDE GOLD MINERAL USING EXTRACT LERAK COMPARED TO CHEMICAL REAGENT Tri Wahyuningsih, Setyo Fajar Nurdjati, Wanidya Ni^immallaili H, Riria Zendy Mirahati
Metallurgical Engineering Study Program, Department of Mining Engineering, Faculty of Mineral and Energy Technology, Universitas Pembangunan Nasional ^Veteran^ Yogyakarta, Jl. Babarsari 2, Tambakbayan, Depok, Sleman, Yogyakarta, 55281
Abstract
The research carried out is one of the stages in the mineral processing process, namely flotation. The flotation process currently carried out still often uses chemicals that can cause contamination and disease. This research is a flotation process using bioreagent in the form of lerak extract. By carrying out this research, it is hoped that it will be useful and inspire companies to switch to using environmentally friendly bioreagents. The sample used in this research is low sulfide gold. This research compares bioreagents from lerak extract and chemical reagents in the form of MIBC. Meanwhile, the fixed variables used are sample weight of 300 grams, grain size fraction -150 + 200 mesh, pH 8 - 9.5, solid percent 35%, and conditioning time 10 minutes. This research was conducted with the aim of determining the effectiveness of lerak extract as a substitute for chemical reagents to increase gold recovery.
