Kugwiritsa Ntchito Cyanide mu Gold Cyanidation Process

Njira yopangira golide kukhala woyera ndi yofunika kwambiri pakuchotsa golide m'matanthwe ake. Kumvetsetsa momwe sodium cyanide imagwiritsidwira ntchito panthawiyi ndikofunikira kwambiri pakukonza bwino ntchito komanso kuchepetsa kuwonongeka kwa chilengedwe. Nkhaniyi ikufotokoza njira zosiyanasiyana zomwe zimathandizira kuti Sodium Cyanide igwiritsidwe ntchito popanga golide kukhala woyera.

1. Autodecomposition

Sodium cyanide imawonongeka yokha panthawi ya cyanidation. Izi zimapangitsa kuti pakhale carbonic acid, formic acid, ndi ammonia. Machitidwe a autocomposition amatha kukhala ovuta ndipo amakhudzidwa ndi zinthu monga kutentha, kuchuluka kwa zinthu, komanso kukhalapo kwa ma catalysts ena.

2. Hydrolysis

Kuchuluka kwa sodium cyanide ndi njira ina yofunika kwambiri yogwiritsira ntchito. Kachitidwe ka madzi ndi sodium cyanide ndi motere:

( H2O + NaCN HCN + NaOH )

Hydrogen cyanide (HCN), yomwe ndi chinthu choopsa kwambiri komanso chosasunthika, imapangidwa panthawi ya hydrolysis iyi. Kuchuluka kwa HCN komwe kumapangidwa kumagwirizana kwambiri ndi alkalinity ya yankho. Pamene pH ikukhalabe pa 12 kapena kupitirira apo, yankho la cyanide limakhalabe lokhazikika. Komabe, zinthu zomwe zingachepetse pH, monga carbon dioxide kuchokera mumlengalenga, ma acid mumadzi odzola, ma magnesium ions a divalent ( Mg2+ ) ndi ma aluminium ions a trivalent ( A13+ ), ndi mchere wosiyanasiyana mu ore kapena zinthu zosungunuka za mchere wa sulfide , zimatha kufulumizitsa hydrolysis reaction.

3. Kupanga kwa Thiocyanate

Sodium cyanide imakumana ndi mchere wa sulfide monga chitsulo, mkuwa, ndi arsenic kuti ipange ma thiocyanate complexes. Ma reaction amenewa amasintha ma cyanide ions kukhala mitundu yosagwira ntchito kwambiri, zomwe zimachepetsa kuchuluka kwa cyanide yaulere yomwe imapezeka kuti ichotsedwe golide . Kupangidwa kwa ma thiocyanate complexes amenewa sikuti kumawonjezera kugwiritsa ntchito cyanide kokha komanso kumakhudza magwiridwe antchito onse a golide cyanidation process.

Kumvetsetsa njira zogwiritsira ntchito izi kumapereka chidziwitso chofunikira kwa ogwira ntchito pamakampani amigodi ya golide. Poyang'anira mosamala ndikuwongolera momwe ma cyanidation amagwirira ntchito, ndizotheka kuchepetsa kugwiritsa ntchito cyanide, kuwongolera kubweza golide, ndikuchepetsa momwe chilengedwe chimagwirira ntchito migodi ya golide.