
Mu makampani opanga golide, kuchotsedwa kwa cyanide kumakhalabe njira imodzi yomwe imagwiritsidwa ntchito kwambiri pochotsa golide kuchokera ku miyala. Makamaka sodium cyanide, imakondedwa chifukwa cha kugwira ntchito kwake bwino, kukhazikika kwake, komanso mtengo wake wotsika. Kudziwa kuchuluka kwa sodium cyanide komwe kuli koyenera ndikofunikira chifukwa kumakhudza mwachindunji magwiridwe antchito a kuchotsa golide, ndalama zogwirira ntchito, komanso kuganizira za chilengedwe.
Malingaliro Ongoganizira
Mwachidziwitso, kusungunuka kwa golide mu yankho la cyanide kumatsatira njira inayake ya mankhwala. Kuti gramu iliyonse ya golide isungunuke, pafupifupi magalamu 0.92 a Sodium Cyanide amafunika kutengera momwe zinthu zimachitikira pogwiritsa ntchito magetsi. Komabe, m'zochitika zenizeni, kumwa kwenikweni kwa Sodium cyanide kumakhala kokwera kwambiri, nthawi zambiri kuwirikiza 50 - 100 kuposa kuchuluka kwa malingaliro.
Zinthu Zomwe Zimakhudza Kukhazikika Kwabwino Kwambiri
Makhalidwe a Ore
Mineralogy ya Golide : Mtundu wa mchere wa golide womwe umapezeka mu miyala umakhala ndi gawo lofunika kwambiri. Ngati golideyo ali mu mawonekedwe abwino, omasuka, amafunika kuchuluka kwa cyanide kosiyana poyerekeza ndi golide womwe umagwirizana ndi mchere wa sulfide kapena zinthu zina zotsutsa. Mwachitsanzo, m'mitsempha ina ya quartz yokhala ndi golide, komwe golideyo ndi womasuka - kugaya, kuchuluka kwa cyanide kochepa kungakhale kokwanira.
Kukula kwa Tinthu ndi Kulowa : Matanthwe osalala nthawi zambiri amakhala ndi malo okwera pamwamba, zomwe zimathandiza kuti pakhale kulumikizana bwino pakati pa yankho la sodium cyanide ndi tinthu tagolide. Chifukwa chake, kuchuluka kochepa kwa cyanide kungakhale kothandiza. Mosiyana ndi zimenezi, miyala yosalala ingafunike kuchuluka kwakukulu kuti iwonetsetse kuti madzi atuluka bwino. Kuphatikiza apo, kulowa kwa tinthu tating'onoting'ono ta miyala kumakhudza kuyenda kwa yankho la cyanide kudzera mu miyala, zomwe zimakhudza kuchuluka kofunikira.
Kupezeka kwa Zitsulo Zina : Makamaka mkuwa umakhudzidwa kwambiri ndi sodium cyanide. Umatha kumwa cyanide yambiri panthawi yochotsa mkuwa. Pa gramu iliyonse ya mkuwa wosungunuka, magalamu 2.3 mpaka 3.4 a cyanide nthawi zambiri amafunika. Mu miyala yokhala ndi mkuwa wambiri, kuchuluka kwa sodium cyanide kungakhale kofunikira kuti zitsimikizire kuti pali cyanide yokwanira yosungunula golide. Zitsulo zina monga zinc, lead, ndi iron zimathanso kukhudza kugwiritsidwa ntchito kwa cyanide, ngakhale pang'ono.
Zochita za Ndondomeko
Mlingo wa pH : PH ya yankho lochotsa madzi ndi chinthu chofunikira kwambiri. Sodium cyanide imasungunuka mu yankho, ndikupanga hydrocyanic acid (HCN), yomwe ndi mpweya woopsa kwambiri. Mlingo wa hydrolysis umadalira pH ya yankho. Pa pH ya 10.5, 6.1% yokha ya hydrocyanic acid imapangidwa, pomwe pa pH ya 9.0. 67.1% imapangidwa. Kuti muchepetse kutayika kwa cyanide kudzera mu hydrolysis ndikuwonetsetsa kuti yankho la cyanide likhazikika, pH nthawi zambiri imasungidwa pakati pa 11 ndi 12 mu zomera zagolide za CIP (Carbon-in-Pulp). Izi zimakhudzanso kuchuluka kwa sodium cyanide, chifukwa malo okhala ndi alkaline angafunike kuchuluka kwakukulu pang'ono kuti golide litulutsidwe bwino.
Kuchuluka kwa Oksijeni Yosungunuka : Mpweya ndi wofunikira pakusungunuka kwa golide mu yankho la cyanide. Kuchitapo kanthu kumafuna ma ioni a cyanide (CN⁻) ndi mpweya (O₂). Kusungunuka kwakukulu kwa mpweya kutentha kwa chipinda ndi kuthamanga ndi 8.2 mg/L. Ngati kuchuluka kwa okosijeni wosungunuka mu slurry kuli kochepera 4 mg/L, kumatha kuchepetsa kuchuluka kwa kusungunuka kwa golide. Zikatero, mpweya ukhoza kulowetsedwa mu slurry kapena hydrogen peroxide ikhoza kuwonjezeredwa kuti iwonjezere kuchuluka kwa okosijeni. Chiŵerengero cha okosijeni ndi cyanide n'chofunikira kwambiri; kusalinganika kungayambitse kuchepa kwa kuchuluka kwa leaching. Popeza kuchuluka kwa okosijeni kumakhudza kinetics ya reaction, kumakhudzanso kuchuluka kwa sodium cyanide komwe kuli koyenera. Kuchuluka kwa okosijeni wochuluka kungathandize kuti kuchuluka kwa cyanide kuchepe pang'ono, komanso mosemphanitsa.
Miyeso Yokhazikika Yokhazikika Pakuchita
Mu njira za CIP ndi CIL (Carbon-in-Leach) : Mu njira yachizolowezi ya CIP kapena CIL, komwe miyala yokhala ndi golide imakhala ngati slurry ndipo Carbon imagwiritsidwa ntchito kuyamwa golide wosungunuka, kuchuluka kwa sodium cyanide nthawi zambiri kumakhala pakati pa 0.3 - 0.4 magalamu pa lita imodzi (0.03 - 0.04%). Kuchuluka kumeneku kwapezeka kuti ndi kothandiza pamitundu yosiyanasiyana ya miyala pansi pa mikhalidwe yabwinobwino yogwirira ntchito. Komabe, pa miyala yovuta kwambiri kapena yomwe ili ndi kuchuluka kwakukulu kwa zodetsa, kuchulukako kumatha kusinthidwa, nthawi zina kufika pa 0.6 - 0.8 magalamu pa lita imodzi (0.06 - 0.08%).
Mu Kuchotsa Vat : Kuchotsa Vat nthawi zambiri kumagwiritsidwa ntchito pa miyala yolimba kwambiri kapena pamene miyalayo ikukonzedwa m'magulu. Mu njirayi, kuchuluka kwa sodium cyanide nthawi zambiri kumakhala kokwera, pafupifupi 1.0 gram pa lita imodzi (0.1%). Kuchuluka kwakukulu kumakwaniritsa malo otsika a tinthu ta miyala yolimba kwambiri ndipo kumathandiza kuonetsetsa kuti yankho la cyanide likhoza kulowa mu miyalayo ndikusungunula golide bwino.
Pa Kuchotsa Misozi : Mukachotsa misozi kuchokera ku njira zakale zopangira (monga pambuyo pa kupatukana kwa mphamvu yokoka), kuchuluka kwa cyanide kumatha kusiyana kutengera kuchuluka kwa golide wotsala ndi mtundu wa misozi. Kawirikawiri, kuchuluka kwa cyanide kumatha kuyambira 0.5 - 2 kg/t ya ore, yomwe, ikasinthidwa kukhala kuchuluka kwa yankho, imatha kukhala pakati pa 0.05 - 0.2 magalamu pa lita imodzi (0.005 - 0.02%). Kuchuluka kochepa nthawi zambiri kumakhala kokwanira chifukwa misozi ikhoza kukhala itakonzedwa kale, ndipo golide wotsalayo ndi wosavuta kupeza.
Zachilengedwe ndi Chitetezo
Pomwe tikuzindikira kuchuluka kwa sodium cyanide pakupanga golide, ndikofunikira kuganizira za chilengedwe ndi chitetezo. Cyanide ndi chinthu chapoizoni kwambiri, ndipo kutulutsidwa kulikonse m'chilengedwe kumatha kukhala ndi zotsatirapo zoyipa. Kusunga ndende yoyenera sikungothandiza kutulutsa golide moyenera komanso kumachepetsa kuchuluka kwa cyanide yomwe ingakhalepo m'mitsinje yazinyalala. Kuonjezera apo, kusunga bwino ndi kusunga sodium cyanide n'kofunika kwambiri kuti tipewe kutaya kapena kutulutsidwa mwangozi.
Kutsiliza
Kuchuluka kwa sodium cyanide komwe kumayikidwa pa golide kumasiyana malinga ndi zinthu zingapo, kuphatikizapo mawonekedwe a miyala ndi momwe zinthu zimachitikira. Kawirikawiri, pa ntchito zambiri zochotsa golide monga CIP, CIL, ndi vat leaching , kuchuluka kwake kumakhala pakati pa 0.03% - 0.1% (0.3 - 1.0 magalamu pa lita imodzi). Komabe, pa chinthu chilichonse chamtengo wapatali, tikulimbikitsidwa kuchita mayeso atsatanetsatane a labotale, monga mayeso a botolo ndi mipiringidzo, kuti tidziwe molondola kuchuluka kwa sodium cyanide komwe kuli koyenera kwambiri. Izi zidzatsimikizira kuti golide abwezeretsedwa bwino kwambiri pamene akuchepetsa ndalama komanso zotsatirapo zachilengedwe.
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