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将热输送到某一物体,通常意味着你把手里的东西给了它。我们常常认为,在这种输送过程中包含着某些无效的工作,犹如空放运货车。可是铝的熔炼则是一种特殊情况,因为它的导热率高。如果我们急速地把热输给其他金属,它们的表面就会烧坏,但是铝却能承受。铝熔炼专家B.马歇尔说过一句名言,“熔炼铝,燃烧嘴的工作最重要”。我不但同意他的这一观点,而且我想更强调一下,
Delivering heat to an object usually means that you have given it to something in your hand. We often think that there are some ineffective jobs involved in the delivery process, like empty delivery trucks. However, aluminum smelting is a special case because of its high thermal conductivity. If we quickly lose heat to other metals, their surfaces will burn out, but aluminum will survive. Aluminum melting expert B. Marshall said a famous saying, “the most important work of melting aluminum, burner.” I not only agree with this view of him, but I want to emphasize more,