There is a lava centrifugation recipe, which outputs tungsten nuggets and other things. Nuggets can be crafted into ingots, then into plates by using some rotating machine. Then 12 tungsten plates can be crafted into crucible and plates mold to smelt more tungsten. This looked doable by using steam machines, so I "declared" this as a major project and did it. It only took some pipes, distilled water tank, lava tank, 1 titanium burning box, 1 chrome boiler, 1 steel turbine, 1 steel centrifuge and 1 twilight forest for charcoal. GregTech is fun
You should write a guide on the wiki documenting this clever way of sneaking up to tungsten tier crucibles!