Sodium Cyanide mu Leaching process of Arsenic-Bearing Ores

Pankhani ya mineral processing, kuchotsa zitsulo zamtengo wapatali kuchokera ku ores nthawi zambiri zimakhala zovuta kwambiri, makamaka polimbana ndi ores ovuta monga omwe ali ndi arsenic. Ores okhala ndi arsenic ndi ovuta chifukwa cha mineralogy yawo yodabwitsa komanso zoopsa zomwe zingatheke zachilengedwe ndi thanzi zomwe zimagwirizanitsidwa ndi arsenic. Cyanidation, njira yomwe imagwiritsa ntchito sodium cyanide, kwa nthawi yaitali yakhala njira yachikhalidwe komanso yogwiritsidwa ntchito kwambiri pochotsa golide ku miyala yotereyi. Tsamba ili labulogu limayang'ana kugwiritsa ntchito kwa Sodium Cyanide mu leaching process za miyala yokhala ndi arsenic, ndikufufuza mfundo zake, zovuta zake, ndi malingaliro ake zachilengedwe.

Kuvuta kwa Ores Okhala ndi Arsenic

M'migodi ya golide, ma depositi a hydrothermal amapezeka nthawi zambiri pomwe mineralization ya golide imalumikizidwa ndi sulfide ndi mankhwala azitsulo zoyambira, arsenic, antimony, kapena tellurium. Mtundu woterewu wa mineralization umapangitsa kuti zikhale zovuta kubweza golide pogwiritsa ntchito njira wamba monga kuphatikiza, kulekanitsa mphamvu yokoka, kapena kulunjika. cyanidation. Arsenic, makamaka, ikhoza kukhala ndi zotsatirapo zoipa pa cyanide leaching process. Mwachitsanzo, panthawi yokazinga ndi kuyika golide wambiri, arsenic ndi chinthu chachikulu chomwe chimapangitsa kuti golide ndi siliva azitulutsa cyanide. Pamene kuchuluka kwa arsenic mu golide kumakwera, kuchuluka kwa golide ndi siliva pogwiritsa ntchito Sodium cyanide amachepetsa pang'onopang'ono.

Mfundo za Cyanide Leaching ndi Sodium Cyanide

Njira ya cyanide leaching yokhala ndi sodium cyanide imadalira kuthekera kwa ayoni a cyanide kupanga zinthu zokhazikika ndi golide. Pankhani ya miyala yokhala ndi arsenic, kupezeka kwa mchere wa arsenic kumapangitsa izi kukhala zovuta. Arsenopyrite, mchere wamba wokhala ndi arsenic mu miyala ya golide, imatha kuchitapo kanthu ndi cyanide ndi mpweya. Pamene arsenopyrite ndi oxidized mu alkaline sing'anga, imapanga zinthu zomwe zingathe kutengedwa kuchokera pa zomwe zimachitika ndi chipwirikiti. Komabe, oxidation imapanganso chinthu chomwe chitha kupanga wosanjikiza pamwamba pa arsenopyrite osakhudzidwa, zomwe zimalepheretsa kutulutsa.

Malingaliro mu Leaching process

Kudzimbidwa

Chifukwa cha zovuta zomwe zimaperekedwa ndi ores okhala ndi arsenic, kuwongolera nthawi zambiri ndikofunikira. Kuwotcha kale inali njira yodziwika bwino yopangira mankhwala, koma ku United States, kuwotcha mchere wokhala ndi arsenic ngati arsenopyrite sikuvomerezekanso chifukwa cha malamulo okhwima a chilengedwe okhudza mpweya wa arsenic. M'malo mwake, njira zina za hydrometallurgical, monga kuthamanga kwa okosijeni, okosijeni wachilengedwe, ndi okosijeni wamankhwala, zikufufuzidwa.

Leaching Conditions

Mikhalidwe yotsika, kuphatikiza pH, kutentha, ndende ya cyanide, ndi chipwirikiti, ndizofunikira. Kusiyanasiyana kwa golide wokhala ndi cyanide kumachitika mkati mwa pH ya 9 - 12. ndipo mayeso awonetsa kuti pH yozungulira 11 nthawi zambiri imakhala yabwino pa dongosolo la cyanidation. Kutentha kumakhudza momwe amachitira, ndipo m'njira zina zomwe zikubwera pochiza arsenopyrite yokhala ndi golide, kutentha kocheperako kungagwiritsidwe ntchito. Kuyika kwa cyanide kuyenera kuyendetsedwa bwino; Kuchulukirachulukira kungapangitse kuchuluka kwa leaching koma kungayambitsenso ziwopsezo zazikulu zachilengedwe ndi chitetezo.

Kukula kwamitundu

The tinthu kukula kwa ore chitsanzo kumakhudzanso leaching mlingo. Nthawi zambiri, tinthu tating'onoting'ono tomwe timapanga tinthu tating'onoting'ono timene timatulutsa timadzi tambiri timene timatulutsa timadzi tating'onoting'ono tomwe timatulutsa timadzi tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono timene timatulutsa timadzi tambiri tomwe timatulutsa timadzi tating'onoting'ono ta golide. Komabe, kukwaniritsa zabwino kwambiri tinthu kukula kungafune zina mphamvu ndi processing masitepe.

Zokhudza Zachilengedwe ndi Chitetezo

Cyanide ndi chinthu chapoizoni kwambiri, ndipo kugwiritsidwa ntchito kwake m'makampani amigodi kumadzetsa nkhawa zachilengedwe komanso chitetezo. Sodium cyanide zinyalala zamadzimadzi angayambitse milingo yosiyanasiyana ya kuipitsa chilengedwe. Ngati cyanide itatayika, imatha kuwononga nthaka, magwero a madzi, ndikuwononga nyama zakuthengo. Chifukwa chake, njira zopewera chitetezo zimayendetsedwa posungira, kuyendetsa, komanso kugwiritsa ntchito sodium cyanide. Ziyenera kusungidwa mu mpweya mpweya ndi malo owuma, makamaka mu wapadera kosungira katundu kapena kabati ndi awiri maloko. Kufufuza ndi kukonza nthawi zonse kumafunika panthawi yosungiramo, ndipo kutentha ndi chinyezi cha malo osungirako ziyenera kuyendetsedwa.

Njira Zina ndi Zowonera Zamtsogolo

Poganizira zovuta ndi zoopsa zomwe zimagwirizanitsidwa ndi kugwiritsa ntchito cyanide, pali chidwi chowonjezereka chofuna njira zina zochotsera golide kuchokera ku miyala yokhala ndi arsenic. Ma leaching agents osagwiritsa ntchito cyanide, monga thiosulfate, thiourea, ndi zina zowononga zachilengedwe, akufufuzidwa. Kuphatikiza apo, kupita patsogolo kwamatekinoloje opangira mankhwala komanso njira zochotsera bwino zikuyembekezeka kupititsa patsogolo kuchira kwa golide kuchokera ku miyala yokhala ndi arsenic ndikuchepetsa kuwononga chilengedwe.

Pomaliza, ngakhale sodium cyanide imakhalabe reagent yofunikira pakutulutsa miyala ya arsenic kutulutsa golide, makampaniwa akusintha nthawi zonse kuti athetse mavuto omwe akukumana nawo. Pomvetsetsa kuyanjana kovutirapo pakupanga leaching, kugwiritsa ntchito njira zoyenera zotetezera ndi chilengedwe, ndikuwunika njira zina zamaukadaulo, makampani amigodi amatha kuyesetsa kukhala ndi njira zokhazikika komanso zogwira mtima zochotsa.