I have the same problem as well. It takes bronze to make a coal generator and bronze requires tin dust, so no that's not a working solution. Heat generators and biofuel generators are the only sources of electricity that don't require some kind of enriched dust; the biofuel also requires a crusher, and especially at the early stage of the game the required platinum is pretty scarce (too scarce IMO, for how much you need). I'll report back if the heat generator is a viable workaround.