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it's for diecasting. just gooogle dosing furnace diecasting

"Dosing furnaces are closed holding furnaces with a spout for direct metal delivery. They are used to dispense an accurate amount of molten metal into the die casting machine. The advantage of dosing furnaces is that because it is closed, it minimizes heat loss and protects the molten metal from excessive oxidation."

Good question. A dosing oven is normally an oven which doses out a particular amount of product to be baked (such as for example bread etc). It could be something automotive (paint/plastic curing, etc.) or it’s not completely beyond the realms of possibility that this is a conventional bread dough dosing oven (see VW part 199 398 500 A), but seems unlikely.

You wouldn't walk on a dosing oven in the usual course of events. However, it is totally possible that someone was up there doing maintenance or debugging (let me drop a temperature probe in there to test if the ovens built in temperature measurement is accurate!)