| 摘要 |
A sliding gate closure member for a bottom-pour hot metal vessel. The gate includes an erosion-resistant nozzle orifice insert positioned in a low-cost refractory and a hard refractory top plate that presents a crack-free surface to the molten metal, thus preventing the formation of fins. An alternative gate construction has a recessed erosion-resistant nozzle orifice insert positioned in a hard refractory that serves as both a back-up material for the orifice insert and as the top surface of the gate, yet provides similar protection against the formation of fins.
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