International Science Community Association International Research Journal of Environmental Sciences 15 4 2026 10 22 Environmental beneficiation of Kalmakyr Copper-Molybdenum ore by Pre-flotation Gold-Silver Gravity Recovery 66 74 EN Sirojiddin Muradov 1 Karshi state technical university, Karshi, Uzbekistan Dubey Arti 1 Department of Chemistry, VIVA College Virar (W), Maharashtra, India KANSOLE and Laboratory of Geosciences and Environment (LaGE) Michelline Marie Regina 1 University Yembila Abdoulaye Toguyeni, P.O 54 Fada N' Gourma, Burkina Faso University Joseph KI-ZERBO 2 Multidisciplinary Laboratory for Engineering Science Research, Polytechnic School of Ouagadougou (EPO), 18 PO 234 Ouaga 18, Burkina Faso P.O 7021 3 University Yembila Abdoulaye Toguyeni, P.O 54 Fada N' Gourma, Burkina Faso Ouagadougou 4 Burkina Faso 5 BEIDARI Mohamed 6 KIMA Adama 7 Kumar Brinder 1 Department of Zoology, GGM Science College Jammu, J&K (UT), India Yadav Surender Singh 1 Department of Economics, Government College, Kanina (Mahendergarh), Haryana, India Narayan Laxmi 2 Department of Economics, Government College, Mahendergarh, Haryana, India Musajonov Mukhammadrasul 1 Tashkent State Transport University, Temiryo‘lchilar Street 1, Tashkent, 100167, Uzbekistan Ibadullaev Ahmadjon 2 Tashkent State Transport University, Temiryo‘lchilar Street 1, Tashkent, 100167, Uzbekistan Babayev Askar 3 Tashkent State Transport University, Temiryo‘lchilar Street 1, Tashkent, 100167, Uzbekistan Chorshanbiev Umar 4 Tashkent State Transport University, Temiryo‘lchilar Street 1, Tashkent, 100167, Uzbekistan Souley HAROUNA 1 Department of Civil Engineering, School of Mines, Industry and Geology of Niamey (EMIG), Niamey, Niger Abdourazakou MAMAN HASSAN 2 Department of Mines-Geology, School of Mines, Industry and Geology of Niamey (EMIG), Niamey, Niger IBRAHIM ELHADJI DAOU 3 Department of Mining Engineering and Environment, School of Mines, Industry and Geology of Niamey (EMIG), Niamey, Niger Chékaraou Mahamane Moustapha Sanda 4 Djibo Hamani University of Tahoua, Faculty of Education Sciences, Department of Discipline Didactics, Tahoua-Niger Mansour Badamassi Kadri Mahaman 5 Dept. of Geological and Environmental Sciences, Faculty of Sciences and Techniques, André Salifou University of Zinder (UAS), Zinder, Niger Laouali Idi Karimou 6 Department of SVT, Abdou Moumouni University, Higher Normal School, Niamey, Niger Adama BOUBACAR AMADOU 7 Department of Mines-Geology, School of Mines, Industry and Geology of Niamey (EMIG), Niamey, Niger Usmanovich Samadov Alisher 1 Department of Engineering Communication, Tashkent University of Architecture and Civil Engineering, Tashkent, Uzbekistan qizi Abdusamiyeva Lobarkhon Nomonjon 2 Department of Mining, Almalyk State Technical Institute, Almalyk, Uzbekistan Bakhodirovna Khojimuratova Khilola 3 Department of Mining, Almalyk State Technical Institute, Almalyk, Uzbekistan > Research Paper 2026 8 17 2026 10 22 Improving recovery of valuable metals before tailings generation is an important component of resource-efficient mineral processing. This study evaluates the environmental significance of pre-flotation gravity recovery from Kalmakyr copper-molybdenum ore, Uzbekistan, by comparing a laboratory 30-KS shaking table with an FLSmidth Knelson KC-MD3 centrifugal concentrator. The assessment combines metallurgical performance with screening indicators relevant to environmental management: concentrate mass pull, gold and silver recovery, metal upgrading, and preservation of copper in the downstream flotation feed. Grinding for 20 min produced 70.3% material finer than 0.074 mm. The best tested shaking-table condition, 110 min-1 at 10 mm amplitude, recovered 21.91% Au and 24.60% Ag into 1.20% of the feed mass and preserved 99.55% of Cu in the gravity tailings. The 65 G Knelson condition recovered 24.94% Au and 20.80% Ag into 0.92% of the feed mass while preserving 99.27% of Cu. Gold upgrade ratios were 18.3 for the shaking table and 27.1 for the Knelson concentrator; corresponding silver upgrade ratios were 20.5 and 22.6. Thus, a small pre-flotation concentrate captured approximately one-fifth to one-quarter of the gravity-responsive precious-metal inventory without substantial copper diversion. This result indicates a resource-conservation opportunity and a potential reduction of valuable-metal loading to final tailings. Because electricity, water, reagent consumption, and final flotation-tailings quality were not measured, the study presents an environmental screening rather than a complete life-cycle assessment. Copyright@ International Science Community Association