Stuck already

Really enjoying this Alpha so far, but I accidentally bulldozed my research lab and can’t recreate it as I don’t have enough Steel. My iron mines have now halted as they are full, I’m stuck. Anyone know how I can proceed ?

Do you have a steel mill running to convert the iron to steel?

Not yet, didn’t get that far. As it was early game I have started again now, but this could be an issue for players going forward as there seems to be no way to recover.