| 释义 |
pyritic, a.|paɪə-, pɪˈrɪtɪk|
[f. pyrit-es + -ic.]
Of or pertaining to pyrites, containing or resembling pyrites. spec. applied to a process for smelting sulphide copper ores with pyrites so that oxidation of the latter produces all the necessary heat.
1802Howard in Phil. Trans. XCII. 179 Bright shining spiculæ, of a metallic or pyritic nature. 1813Bakewell Introd. Geol. (1815) 104 Yorkshire slate..is sometimes covered with thin pyritic configurations resembling trees, hence called ‘dendritical’. 1892Pall Mall G. 5 May 2/1 The deep levels..where the ore becomes pyritic. 1897Huntington & McMillan Metals (new ed.) 331 This is the process known as pyritic smelting, and there is some prospect that it may take a prominent position in the metallurgy of copper, although at present it is mainly employed in the extraction of gold and silver from complex ores. 1926D. M. Liddell Handbk. Nonferrous Metallurgy II. xxvii. 944 There are three distinct processes in blast-furnace smelting: (1) The reduction process... The blast oxidizes the carbon of the coke and but little of the sulphur in the ore... (2) The pyritic process, in which raw massive sulphides are smelted in a highly oxidizing atmosphere without the addition of carbonaceous fuel... (3) The partial- or semipyritic process. Ibid. 945 The essential requirements for pyritic smelting are siliceous material which is high in free silica, and heavy pyrite ore... The pyrite ore not only furnishes the heat for the operation, but also the sulphur for the matte required. 1974D. Avery Not on Queen Victoria's Birthday xiv. 280 ‘Pyritic smelting’, developed by Lawrence Austin and Robert Sticht at [sic] Montana between 1887 and 1896 and introduced at Mount Lyell in Tasmania in the latter year,..provided a means of producing much cheaper copper. |