Chromium concentration and speciation in leachates from AOD slag were measured.
Impact of Eh and pH on chromium speciation were discussed with Pourbaix diagram.
Cr leaching model was established by PHREEQC simulation combined with FactSage.
Toxic hexavalent chromium was released during the earlier leaching stage.
After 10 days, trivalent chromium was the dominated speciation in leachates.