transforming the ore into iron in a single operation, or by the bst furnace, which first smelts the ore, then changes it into iron, by carrying away the three to four per cent. of coal, which is combined with it.
他们在地上毫不费力地捡到炭和铁矿石。他们先把铁矿石打碎,用手把铁矿石表面一层杂质擦干净,然后就把炭和铁矿石一层夹一层地堆起来,好象木炭工人用木柴烧炭那样。这样,在鼓风机的作用下,炭就变为碳酸,然后又变成氧化碳,在变成氧化碳的过程中就使氧化铁还原,放出了氧气。
工程师就这样进行工作。他事先在窑里造了一根陶土的管子,把它装在海豹皮风箱的一端,然后把风箱装在矿石堆附近,工程师用一个木架、一些植物纤维做的绳子和一个秤锤做成鼓风机,把大量的空气吹到立方体里去,温度提高以后,空气也促进化学变化,到一定的时候就能冶炼出纯铁来。
the coal, as well as the ore, was collected without trouble on the surface of the ground. they first broke the ore into little pieces, and cleansed them with the hand from the impurities which soiled their surface. then coal and ore were arranged in heaps and in successive yers, as the charcoal-burner does with the wood which he wishes to carbonize. in this way, under the influence of the air projected by the blowing-machine, the coal would be transformed into carbonic acid, then into oxide of carbon, its use being to reduce the oxide of iron, that is to say, to rid it of the oxygen.
thus the engineer proceeded. the bellows of sealskin, furnished at its extremity with a nozzle of cy, which had been previously fabricated in the pottery kiln, was established near the heap of ore. using the mechanism which consisted of a frame, cords of fiber and counterpoise, he threw into the mass an abundance of air, which by raising the temperature also concurred with the chemical transformation to p
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