but..i put the metals in the forge..and than?just wait for ingot metal?

yes but the rate of refining is way too slow, I mean using the refining forge gives you one metal Ingot/20sec, which is 3 Ingots/min, so 180 Ingots/hour.

If you want to smelt a lot of metal (we are a PvE server, so a lot of people are playing the game as sandbox building) you have to use a lot of forges to get a decent amount to be able to produce walls fast enough for builders. So we want to use the electric furnace from Aku Shima mod without using everything else included in this mod (we want to keep taming hard to do, no portable fridge nor generator, and no powerfull tranq darts).

So we want to use the electric furnace only to improve player's experience just by making those Ingots faster, because they farm fast enough to full load 15 forges and they just have to wait for about 4h IRL to smelt everything (you can load 1200 Metal in a furnace, with 200 spark to fuel the whole thing, at a rate of 1 spark per 6 metal, at a rate of 180 Ingots/hour, you do 360 Metal per hour which results in less than 4h to smelt a full refining forge).

everybody is already having the Industrial grill, the equivalent for metal is, for us, this electric furnace, but we need only this, not the whole mod :/