Board Thread:Speculation House/@comment-27404492-20170918133425/@comment-4010415-20170925211853

I kinda took it as Cinder generating a sort of explosion to throw the gears off her, not pushing them away with fire.

To be honest, toward the end of Cinder and Ozpin's fight, when Cinder had fiery stuff flying around her before Ozpin leaped at her, the fiery stuff was breaking the pillars and walls around her, if I remember correctly. So, yeah, either she can make solid fiery/lava material, or the fire is following anime logic.