As　a　new　technology　for　the　short-process　recovery　of　Nd–Fe–B　sintered　magnet　sludge,　the　calcium　thermal　reduction　diffusion　method　has　attracted　significant　attention　due　to　its　low　energy　consumption,　environmental　friendliness,　and　high　recovery　rate.　However,　traditional　calcium　thermal　reduction　diffusion　technology　still　has　issues　such　as　an　insufficient　reaction　between　the　sludge　and　reducing　agent　after　increasing　the　amount　of　reactants,　the　use　of　a　large　amount　of　reducing　agent,　and　low　recovery　efficiency.　Therefore,　a　novel　dynamic　calcium　thermal　reduction　diffusion　technology　was　proposed,　with　the　calcium　reduction　diffusion　of　sludge　and　calcium　undergoing　a　continuous　mixing　and　diffusion　state　throughout　the　entire　process,　greatly　improving　the　efficiency　of　the　reaction.　Compared　with　the　traditional　process,　the　amount　of　reactants　was　increased　from　a　few　grams　to　hundreds　of　grams,　and　the　amount　of　reducing　agent　calcium　was　reduced　by　25%.　Subsequently,　regenerated　magnetic　powder　with　a　uniform　particle　size,　good　dispersion,　and　excellent　magnetic　properties　was　obtained.　The　saturation　magnetization　under　a　3　T　magnetic　field　was　increased　by　27.9%　compared　with　the　initial　sludge.　The　maximum　magnetic　energy　product　of　the　magnet　prepared　by　doping　50　wt%　regenerated　magnetic　powder　was　45　MGOe,　which　reached　the　highest　level　of　the　regenerated　magnets　prepared　by　recycling　sludge.　What　is　encouraging　that　this　new　technology　had　the　advantage　of　achieving　large-scale　production　and　reducing　production　costs,　providing　a　potential　industrialization　solution　for　the　green　and　efficient　recovery　of　Nd–Fe–B　sintered　magnet　sludge.　©　2024