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对大气熔炼条件下,铜在高铝质陶瓷坩埚中被熔融玻璃净化后的过冷度进行了实验和理论研究。结果发现:采用先加玻璃净化剂、等其熔化后再加金属的净化工艺,使铜在高铝质陶瓷坩埚中获得了221K的过冷度;铜在高铝质陶瓷坩埚中深过冷的获得,与所采用的净化工艺可使高铝质陶瓷坩埚表面上形成一熔融玻璃层有关;要使铜在高铝质陶瓷坩埚中获得深过冷,所用的净化玻璃必须具有一定的碱度;熔体体积对过冷度的影响比较小,从理论上预测出冷却速度为1K·s~(-1)时,重量为1t的铜液被钠钙硅酸盐玻璃净化后,仍可获得181K的过冷度。
Under atmospheric smelting conditions, the experimental and theoretical studies on the undercooling of copper in molten glass in a high alumina ceramic crucible were performed. The results showed that copper was first cooled to 221 K in a high alumina porcelain crucible, and then was supercooled in a high alumina porcelain crucible Obtained, and the purification process can be used to form a high-alumina ceramic crucible surface layer of molten glass; to make copper in the high-alumina ceramic crucible deep undercooling, the purification of the glass used must have a certain alkalinity; The effect of melt volume on supercooling degree is relatively small. It is predicted theoretically that when the cooling rate is 1K · s ~ (-1), the copper solution with the weight of 1t is purified by soda-lime silicate glass, and 181K The degree of undercooling.