Metal-smelting heat-preserving furnace
A heat preservation furnace and metal technology, applied in the direction of furnaces, crucible furnaces, furnace components, etc., can solve the problems of short service life, high thermal stress load on the surface of heating elements, high frequency of maintenance or replacement, etc., achieve high heat utilization rate, prevent heat The effect passed to the shell
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[0019] see figure 1 , the metal smelting and holding furnace of the present invention has a cylindrical furnace body structure, and the furnace body includes an outermost shell 1, a refractory brick layer 2 located in the shell 1 and an innermost crucible 6, and the shell There is a vacuum isolation cavity 4 between the body 1 and the refractory brick layer 2, the inner surface of the refractory brick layer 2 has a plurality of protrusions 5, and the plurality of protrusions 5 are in close contact with the crucible 6, the A first heating element 7 is arranged in the refractory brick layer 2, and the first heating element 7 is a spiral electric heating wire; each of the plurality of protrusions 5 has an independent second electric heating element 8, and the first heating element 7 The control circuits of the second electric heating element 8 and the first electric heating element 7 are independent of each other; the outer side of the refractory brick layer 2 is also wrapped wit...
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