Abstract: Effect of reaction heat per unit mass on the ferrotitanium prepared by thermite method was studied. The samples were analyzed by scanning electron microscope， energy spectrum analyzer， oxygen/nitrogen/hydrogen analyzer and inductively coupled plasma emission spectrometer. The results indicate that the burn rate of the ingredients gradually increases with the increasing reaction heat per unit mass， while it decreases with the increasing Ti content of the objective ferrotitanium. Meanwhile， when the reaction heat per unit mass increases， the Al and O contents of the alloy decrease. A higher reaction heat per unit mass is beneficial to the removal of Al₂O₃ inclusion because of a better slag-metal separation. Nevertheless， under the same reaction heat， the effect of slag-metal separation goes worse and Al and O contents increase with the increasing Ti content of the objective ferrotitanium. Reaction heat per unit mass has a greater effect on the burn rate， slag-metal separation and the recovery of objective ferrotitanium with high Ti content.

Key words: thermite method, ferrotitanium, burn rate, slag-metal separation, reaction heat per unit mass