High-efficiency　reduction　of　Fe3O4　particles　in　molten　copper　slag　is　the　key　for　recovering　slag-entrained　copper,　although　restrained　by　the　sluggish　reaction　kinetics　of　commercial　powdery　reductants　with　low　density.　Here,　a　new　strategy　by　density　tuning　in　conjunction　with　pelletizing　of　the　powdery　reductants　is　suggested,　greatly　enhancing　the　Fe3O4　reduction　kinetics　and　resulting　in　remarkably　facilitating　the　recovery　of　slag-entrained　copper.　Specifically,　by　replacing　the　industrially　used　coal　powder　with　FeS2-C　pellets　at　optimized　density,　the　efficiency　of　Fe3O4　reduction　is　significantly　increased　from　18%　to　51%,　with　the　copper　content　in　the　low-layer　slag　being　correspondingly　enriched　from　1.37%　to　4.53%.　The　SEM-EDS　characterizations　and　finite　element　analytical　results　all　reveal　that　the　enhanced　reduction　of　Fe3O4　by　the　as-designed　reductant　contributes　to　the　decrease　of　slag　viscosity　and　copper　exposure,　as　well　as　to　the　size　growth　of　copper　matte　droplets,　resulting　in　promoted　settling　of　copper-containing　components　for　copper-slag　separation　in　the　molten　state.　Additionally,　the　full　exposure　and　size　growth　of　copper　matte　in　the　molten　state　facilitate　copper　reclamation　during　the　subsequent　grinding-flotation　process　of　the　solidified　slag,　which　increases　the　copper　recovery　from　23.3%　to　85.3%,　with　the　concentrate　grade　being　correspondingly　improved　from　2.8%　to　6.45%　after　one-stage　flotation.　The　results　can　provide　new　insights　into　enhancing　the　recovery　of　slag-entrained　copper.