| 单词 | set copper |
| 释义 | > as lemmasset copper set copper n. a form of metallic copper containing about 6 per cent of cuprous oxide, produced by oxidation during refining. ΚΠ 1904 Trans. Amer. Inst. Mining Engineers 1903 34 671 Some of the copper is oxidized to cuprous oxide and dissolved by the metal bath. When the quantity of dissolved cuprous oxide has reached about 6 per cent, the metal is said to have been brought to ‘set-copper’. 1959 J. Newton Extractive Metall. vi. 376 Usually it is not possible to take any short-cuts in refining copper—the metal must be carried to the set-copper stage and then poled. < as lemmas |
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