puddling
 制窯泥,窯泥,煉鐵


 Pud·dle, v. t. [imp. & p. p. Puddled p. pr. & vb. n. Puddling ]
 1. To make foul or muddy; to pollute with dirt; to mix dirt with (water).
 Some unhatched practice . . .
 Hath puddled his clear spirit.   --Shak.
 2. (a) To make dense or close, as clay or loam, by working when wet, so as to render impervious to water. (b) To make impervious to liquids by means of puddle; to apply puddle to.
 3. To subject to the process of puddling, as iron, so as to convert it from the condition of cast iron to that of wrought iron.
 Puddled steel, steel made directly from cast iron by a modification of the puddling process.


 Pud·dling n.
 1. Hydraul. Engin. (a) The process of working clay, loam, pulverized ore, etc., with water, to render it compact, or impervious to liquids; also, the process of rendering anything impervious to liquids by means of puddled material. (b) Puddle. See Puddle, n., 2.
 2. Metal. The art or process of converting cast iron into wrought iron or steel by subjecting it to intense heat and frequent stirring in a reverberatory furnace in the presence of oxidizing substances, by which it is freed from a portion of its carbon and other impurities.
 Puddling furnace, a reverberatory furnace in which cast iron is converted into wrought iron or into steel by puddling.

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