Ah, I see. Suppose carbide will be normal for now, not like don't have the ore right there anyway. Thanks.
As for the speed... Well I made a quick trip to the editor and I with the refining block I made outputting two green belts of dust, the area needed to smelt that fits roughly 8 such refining blocks. it looks a bit silly on the map (this is all assuming quality-less machines and rare prod2 modules in everything, no beacons).
I know a green belt of tungsten plate is a lot but 400 foundries still seems a bit much, even if the intend is to beacon the stuff