Kugwiritsa Ntchito Cyanide mu Gold Cyanidation Process

he cyanidation process ndi mwala wapangodya pakuchotsa golide kuchokera ku miyala yake. Kumvetsetsa kadyedwe ka sodium cyanide Panthawi imeneyi ndikofunika kuti ntchitoyo ikhale yabwino komanso kuchepetsa kuwononga chilengedwe. Nkhaniyi ikufotokoza njira zosiyanasiyana zomwe zimathandizira kuti anthu azigwiritsa ntchito Sodium Cyanide mu golide cyanidation ndondomeko.

1. Autodecomposition

Sodium cyanide amakumana ndi autodecomposition panthawi ya cyanidation. Izi zimapangitsa kuti pakhale carbonic acid, formic acid, ndi ammonia. Zochita za autodecomposition zimatha kukhala zovuta ndipo zimakhudzidwa ndi zinthu monga kutentha, kukhazikika, komanso kupezeka kwa zinthu zina zoyambitsa.

2. Hydrolysis

Hydrolysis wa Sodium cyanide ndi njira ina yofunika kwambiri yogwiritsira ntchito. Zomwe zimachitika pakati pa madzi ndi sodium cyanide zili motere:

(H2O + NaCN HCN + NaOH)

Hydrogen cyanide (HCN), yomwe imakhala yosakhazikika komanso yapoizoni, imapangidwa panthawi ya hydrolysis iyi. Kuchuluka kwa HCN komwe kumapangidwa kumagwirizana kwambiri ndi alkalinity ya yankho. Mtengo wa pH ukasungidwa pa 12 kapena kupitilira apo, yankho la cyanide limakhalabe lokhazikika. Komabe, zinthu zomwe zimatha kutsitsa pH mtengo, monga mpweya woipa wochokera mumlengalenga, ma acids m'madzi odzola, ma divalent magnesium ions (Mg2 +) ndi ma ion a aluminium trivalent (A13 +), ndi mchere zosiyanasiyana mu ore kapena oxidation mankhwala a Sulfide Minerals, akhoza imathandizira hydrolysis anachita.

3. Kupanga kwa Thiocyanate

Sodium cyanide imakhudzidwa ndi mchere wa sulfide monga chitsulo, mkuwa, ndi arsenic kupanga thiocyanate complexes. Izi zimasintha ma cyanide ions kukhala mitundu yocheperako, ndikuchepetsa kuchuluka kwa cyanide yaulere yomwe imapezeka. kutulutsa golide. Kupanga kwazinthu za thiocyanate sikungowonjezera kumwa kwa cyanide komanso kumakhudzanso magwiridwe antchito a golide wa cyanidation.

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.