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对大体积液态铜在真空熔炼条件下用熔融钠钙玻璃净化后的过冷度进行了实验研究．结果表明：铜的过冷度受真空度、过热度、净化时间及循环次数的影响．在保证金属液不飞溅和溢出的条件下，增加真空度可提高铜的过冷度；铜的过冷度先随过热度增加而增加，当过热度增加到一定值后，又随过热度的增加而减小；增加净化时间，铜的过冷度先是明显增加，随后逐渐趋于稳定；铜的过冷度在前几个循环中随循环次数增加而增大，在第３～６个循环中达到最大，此后基本上趋于稳定．
The experimental study on the supercooling degree of large volume liquid copper after purifying molten soda-lime glass under vacuum smelting was carried out. The results show that the degree of undercooling of copper is affected by the degree of vacuum, degree of superheat, purification time and number of cycles. Under the condition of ensuring the liquid metal does not splash and overflow, increasing the degree of vacuum can increase the degree of supercooling of copper; the degree of superconditioning of copper increases with the degree of superheating first, then when the degree of superheat increases to a certain value, Increase and decrease; increase the purification time, the copper subcooling first increased significantly, and then gradually stabilized; Copper subcooling in the first few cycles with the increase in the number of cycles increased in the first 3 to 6 cycles In the largest, then basically stabilized.