我厂有色铸造车间的铜合金熔炼产量少,品种多,而有些不同牌号的铜合金熔炼是不能使用同一坩埚的。为防止不同牌号金属的互相污染,影响合金质量,使我们所用的中频无芯感应炉内石墨坩埚频繁更换,增加了许多无谓的浪费,在此情况下,我们进行了如下尝试,并取得了良好效果。如图1所示,在150号石墨坩埚内再放入 I plant non-ferrous foundry copper alloy smelting less output, more varieties, and some different grades of copper alloy smelting can not use the same crucible. In order to prevent the mutual contamination of different grades of metals and the quality of the alloy, the frequent replacement of the graphite crucible in the medium-frequency coreless induction furnace used by us increased many unnecessary waste. In this case, we made the following attempts and made good effect. Shown in Figure 1, in a graphite crucible 150 and then into