Objective: To investigate influence of calcining temperature

calcining time and vinegar-quenching times on phase transformation of Pyritum and clarify variation rule and processing mechanism. Method: X-ray diffraction was adopted to qualitative and quantitative evaluate phase composition of different Pyritum sample. Result: Calcining temperature

calcining time and vinegar-quenching times all had a certain impacts on phase transformation in processing process of Pyritum

but processing temperature showed the most obvious effect

then quenching times affected phase transformation of Fe2O3 more obvious than processing time.Phase transformation rule of Pyritum was decomposed from FeS2 to Fe7S8 at first

the main phase of samples that processed under 600 ℃ was Fe7S8

whereas the main phase of Pyritum that processed under 600 ℃ calcined for 4 hours and qunched 3 times was Fe2O3.Along with calcining temperature rised to 800 ℃

the phase was mainly oxidized from Fe7S8 to Fe2O3. Conclusion: Calcining temperature

calcining time and quenching times all have different level of effect on phase composition of Pyritum

and the phase transformation observes some rules.