FIELD: metallurgy, namely units for pumping gas into melt metal.
SUBSTANCE: plug or block for pumping gas into melt metal through contact surface with melt metal includes porous refractory body housed in envelope of non-porous body except contact surface with melt metal; unit for passing gas designed for transporting gas from gas source till porous body. Novelty is non-porous body made of refractory material; porous and non-porous bodies are molded together.
EFFECT: effective reliable pumping of small gas bubbles to bath of melt metal.
10 cl, 2 dwg, 2 tbl
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