中南大学学报（自然科学版）2026，Vol.57Issue(7)：2869-2881,13.DOI:10.11817/j.issn.1672-7207.2026.07.001
缓冷时间对铜渣工艺矿物学特性及浮选指标的影响
Influence of slow-cooling time on process mineralogy and flotation performance of copper slag
摘要
Abstract
Copper slag from a"double-flash"process in certain enterprise in Hubei Province was treated with slow-cooling durations of 12,15,18 and 21 h to investigate its process mineralogy and flotation performance.Chemical phase analysis,optical microscopy,SEM-EDS and automated mineral analysis were employed to characterize the chemical composition,mineral constituents,dissemination characteristics and liberation behavior.Flotation tests were conducted for validation.The results show that prolonging slow-cooling can promote the transformation of copper minerals from magnetite-encapsulated forms to discrete phases with clear boundaries,while simultaneously coarsening the grain size and enhancing the liberation of both copper sulfide and metallic copper.At a grinding fineness where the mass fraction of particles finer than 0.045 mm accounts for 75%,the mass fractions of particles with liberation degree more than 75%reach 75.58%for copper sulfide and 67.07%for metallic copper.These improvements in occurate state and liberation characteristics significantly enhance flotation performance:as slow-cooling time is extended from 12 h to 21 h,copper recovery increases from 59.9%to 72.0%and concentrate grade from 6.42%to 7.94%.Copper ferrite represents the primary phase limiting copper recovery,with copper losses predominantly occurring in the fine fractions below 25 μm and locked particles.关键词
铜渣回收/缓冷时间/工艺矿物学/嵌连关系/矿相分析Key words
copper slag recycling/slow-cooling time/process mineralogy/textural relationship/phase analysis分类
矿业与冶金引用本文复制引用
王艳红,李容娇,叶红波,纪仙赐,蒋昊..缓冷时间对铜渣工艺矿物学特性及浮选指标的影响[J].中南大学学报（自然科学版）,2026,57(7):2869-2881,13.基金项目
国家自然科学基金资助项目(52574341)(Project(52574341)supported by the National Natural Science Foundation of China) （52574341）
