Leaching kinetics of selenium from selenium–tellurium-rich materials in sodium sulfite solutions

摘要: Abstract The leaching kinetics of selenium from selenium–tellurium-rich materials in sodium sulfite solutions was studied. morphologies are mainly spheroid and columnar bodies the range particle size is between 17.77 μm 56.58 μm, which contain 41.73% 40.96% tellurium. ranges experimental elements 126–315 g/L concentration, 100–400 r/min agitation speed, 23–95 °C reaction temperature, 7:1–14:1 liquid–solid ratio 17.77–56.58 average size. results show that rate increases with increasing temperature or decreases has significant effects on 21% to 67% 23 95 °C. data agree quite well Avrami model for leaching, parameter 0.235 apparent activation energy 20.847 kJ/mol.