| 单词 | pimple metal |
| 释义 | > as lemmaspimple metal pimple metal n. Metallurgy an intermediate product in the smelting of copper, containing about 75 per cent or more of copper and having pimples on the surface formed by escaping bubbles of sulphur dioxide. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > base metal > [noun] > copper > types of garcopper1654 rose copper1678 tile copper1825 pimple copper1848 blister-copper ore1861 pimple metal1870 tough-cake1881 tough pitch1881 electrolytic1912 1870 C. L. Bloxam Metals 117 When the charge has contained an excess of oxide of copper, the fine metal has..a pimply appearance caused by the escape of sulphurous acid gas; it is then called pimple metal. 1910 Encycl. Brit. VII. 103/2 The coarse-metal is now smelted,..and the product, consisting of an impure copper sulphide, is variously known as..‘pimple-metal’, when free copper and more or less copper oxide is present, [etc.]. 1958 A. D. Merriman Dict. Metall. 246/1 Pimple metal, a term used in reference to the product of smelting roasted copper ore or coarse metal with coke and siliceous flux. < as lemmas |
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