vat oven and process for operating a vat oven.

摘要

vat oven and process for operating a vat oven. in the process, according to the invention, to operate a vat oven (10), according to the invention, an upper region (14) of the vat furnaces will be fed with raw materials which, under the influence of gravity, descend inside the tank ovens (10). a part of these raw materials, under the influence of the prevailing atmosphere inside the vat furnaces (10) will be melted and / or at least partially reduced. in a lower region (18) of the vat furnaces (10), through at least one feed opening (32), a treatment gas will be introduced that at least partially influences the prevailing atmosphere inside the vat oven (10). the introduction of the lower treatment gas will be so dynamically modulated that in the modulation the operational quantities, pressure p1 and / or volumetric current v1, which will be varied at least temporarily within a time span of (less than) 40 s, especially (less than equal) 20 s, preferably (less than equal) 5 if especially preferred (less than equal) 1 s. according to the invention, at least under an additional opening (42), spaced from the lower inlet line (32), an additional gas is introduced, whose operational quantities, pressure p2 and / or volumetric current (ll) are at the same time less temporarily varied and / or through the batch line (50), connected with the inside (34) of the vat oven (10), for the elimination of gaseous reaction products, a batch gas is derived, whose operational magnitude, pressure p1 and / or volumetric current (lll), at least is temporarily changed. the variation of the operational quantities of the additional gas and / or the supply gas, according to the invention, in such a way that in the interior (34) of the vat oven (10) the pressure p1 and / or the volumetric current (i ) increases at least partially.