Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden.
Boliden Mineral AB, SE-776 98 Garpenberg, Sweden.
Bioresour Technol. 2020 Jun;306:123235. doi: 10.1016/j.biortech.2020.123235. Epub 2020 Mar 23.
Flotation is a key step during mineral separation. Xanthates are the most commonly used collectors for recovering Cu, Ni, and Zn from sulphide ores. However, xanthates are fossil-based and toxic for the environment. The aim of this study was to evaluate the use of lignin nanoparticles and microparticles as sustainable and environmentally friendly collectors. Lignin particles demonstrated good selectivity toward Cu (chalcopyrite), with total recoveries exceeding 80% and grades of up to 8.6% w/w from a Cu-Ni ore in rougher flotation tests. When floating Zn-Pb-Cu ore, lignin nanoparticles could reduce the use of xanthates by 50%. Moreover, they outperformed xanthates alone, achieving total recoveries of up to 91%, 85%, and 98% for Cu, Pb, and Zn, respectively. These results prove the potential of lignin as a flotation collector.
浮选是矿物分离的关键步骤。黄原酸盐是从硫化矿石中回收铜、镍和锌最常用的捕收剂。然而，黄原酸盐是基于化石的，对环境有毒。本研究旨在评估木质素纳米颗粒和微颗粒作为可持续和环保捕收剂的用途。木质素颗粒对铜（黄铜矿）表现出良好的选择性，在粗浮选试验中，从铜镍矿石中总回收率超过 80%，品位高达 8.6%w/w。当浮选锌铅铜矿石时，木质素纳米颗粒可以减少 50%的黄原酸盐用量。此外，它们的表现优于单独的黄原酸盐，铜、铅和锌的总回收率分别高达 91%、85%和 98%。这些结果证明了木质素作为浮选捕收剂的潜力。
