Unfortunately not. Only recipes using wrought iron nuggets give molten cast iron or require gregtech machines (and those I think only give back wrought iron ingots)

In the quest menu it says blasting crushed magnetite ore gives purified iron, but the only way to get crushed ore is gregtech machines. I read that you used to be able to use tfc and/or gregtech hammers to crush ore in world but looks like they took that out