cyaniciden.
/sʌɪˈanɪsʌɪd/ Metallurgy.
Any substance present in an ore or in tailings which consumes the cyanide in the solution used for cyaniding gold or silver, so reducing its effectiveness as a solvent for those metals.
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cyanicide1894
1894 Jrnl. Soc. Chem. Industry 31 Oct. 951/2 To overcome the cyanide-destroying qualities of the acid or iron salts present it is necessary to have recourse to neutralisation.., with or without a preliminary water washing to remove such soluble ‘cyanicides’ as may be present.
1896 T. K. Rose Metall. Gold (ed. 2) xvi. 348 These substances..act as ‘cyanicides’, destroying large quantities of the solvent by direct or indirect oxidising effects.
1904 H. F. Julian & E. Smart Cyaniding xxviii. 202 The principal cyanicide remaining in the Rand concentrates is the basic ferric sulphate.
1936 J. V. N. Dorr Cyanidation Gold & Silver Ores ix. 152 If precious-metal ores contain cyanicides, which preclude the use of cyanidation, flotation may be the only solution.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VI. 233/1 Sulfides of copper, iron, antimony, and arsenic (cyanicides)..consume cyanide and oxygen, thus causing poor gold recoveries.
This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2018).
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