FIELD: metallurgy.
SUBSTANCE: reducing gas is added uniformly across the whole cross section of reducing shaft through several distributing channels of reducing gas, which are located in the form of a star or parallel to each other, and preferably in lower fourth part of reducing shaft. The above channels are located at one and the same level, or when they are located in the form of a star, longer channel is located near the shorter one. Besides, shorter channels are located directly above longer channels in order to avoid the pressure difference when reducing gas is introduced.
EFFECT: uniform distribution of reducing gas and homogeneous metal coating without using any ring air line and expensive lining of reducing shaft, which is related to it and subject to wear.
7 cl, 5 dwg
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