Njira za Cyanidation Leaching for High-Sulfur and High-Arsenic Gold Ores

Kuchiza kwa golide wa sulfure ndi mkulu wa arsenic kwakhala kovuta kwa nthawi yaitali pankhani ya mineral processing. Chifukwa cha kuchuluka kwake kwa mchere komanso zonyansa zambiri, njira zachikhalidwe za cyanidation nthawi zambiri zimavutikira kuchotsa golide ndi siliva. Nkhaniyi ifotokoza mwatsatanetsatane njira zingapo zopangira golide wa sulfure ndi arsenic apamwamba, cholinga chake ndi kuthandiza ogwira ntchito zamigodi kumvetsetsa bwino ndikugwiritsa ntchito matekinolojewa.

Makhalidwe a High-Sulfur ndi High-Arsenic Gold Ores

Mafuta a sulfure ndi apamwamba arsenic golide nthawi zambiri amakhala ndi ma sulfide ambiri ndi arsenides. Zonyansazi sizimangokhudza kutulutsa bwino kwa golide ndi siliva komanso zimawopseza kwambiri chilengedwe. Choncho, pochita ndi ores oterowo, njira yapadera yoyendetsera kayendetsedwe kake imayenera kupititsa patsogolo kuchira kwa golidi ndi siliva ndi kuchepetsa zotsatira za chilengedwe.

Njira Yowotcha Oxidative

Njira yowotcha ya okosijeni ndi njira yomwe imagwiritsidwa ntchito pochiza miyala ya golide ya sulfure komanso ya arsenic. Njirayi imatulutsa sulfure ndi arsenic mu ore kukhala ma oxide a mpweya kapena olimba kudzera mukuwotcha kotentha kwambiri, potero amachotsa zonyansa. Akawotcha, chitsulocho chimamasuka, chomwe chimapangitsa kuti golide ndi siliva azitulutsa.

Masitepe enieni a njira yowotcha ya okosijeni ndi awa:

1. Kuwotcha kwapamwamba kwambiri kumachitika pa golide wapamwamba wa sulfure ndi arsenic wopangidwa ndi kuyandama kuti achotse sulfure ndi arsenic.

2. Mwala wokazinga umatsukidwa ndi asidi wambiri kuti usungunuke zonyansa zambiri.

3. Kenako miyala yotsukidwayo imachotsedwa mu cyanidation leaching, komwe golide ndi siliva zimasungunuka ndi cyanide ndikulowa mu yankho.

Njira ya Thiourea Leaching

Njira ya leaching ya thiourea ndi njira yomwe ikubwera yotulutsa golide wochepa kwambiri, makamaka yoyenera kuchitira golide wagolide wokhala ndi arsenic ndi sulfure wambiri. Thiourea mu njira ya acidic imatha kusungunula golidi ndi siliva mwachangu, imakhala ndi kawopsedwe kakang'ono, ndipo ndiyosavuta kukonzanso. Poyerekeza ndi njira yachikhalidwe ya cyanidation, njira ya thiourea simakhudzidwa kwambiri ndi zinthu zamchere monga antimoni, arsenic, mkuwa, ndi sulfure. Choncho, ili ndi ubwino wodziwikiratu pochiza golide wa sulfure ndi mkulu-arsenic.

Masitepe enieni a njira ya thiourea leaching ndi awa:

1. Gold-bearing sulfide concentrate imapezeka mwa kuyandama.

2. Kukhazikika kwa flotation kumalumikizidwa ndi njira ya thiourea kuti apezenso golide ndi siliva.

3. Golide ndi siliva mu yankho lochotsa madzi zimayamwa ndi ma ion exchange resins kapena activated Carbon kenako zimachiritsidwa pambuyo pake.

Njira Yoyendetsera Ntchito

Njira yochotsera miyala ya Heap ndi njira yochotsera miyala yamtengo wapatali yokhala ndi ndalama zochepa zopangira komanso yosavuta kugwiritsa ntchito, yoyenera pochiza miyala yamtengo wapatali ya sulfure komanso ya arsenic yokhala ndi golide wochepa. Njirayi imaphatikizapo kuyika miyala yamtengo wapatali pamalo okonzedweratu ndikupopera kapena kuichotsa ndi yankho la cyanide, zomwe zimathandiza kuti yankholo lidutse mu miyalayo ndikupanga zotsatira zochotsera miyala.

Njira zodziwikiratu za njira yodulira milu ndi monga:

1. Miyalayo imaphwanyidwa mpaka kufika patinthu ting’onoting’ono kenako n’kuunjikidwa pamalopo.

2. Mwalawo umapopedwa kapena kuzunguliridwa ndi cyanide leaching solution, ndipo yankho limadutsa mu chitsulocho kuti lipangitse kutuluka.

3. Njira yochotsera madzi imasonkhanitsidwa, ndipo golide ndi siliva zimapezedwanso kudzera mu ma ion exchange resins, Activated Carbon adsorption, kapena m'malo mwa zinc.

Njira Yophunzitsira Yolimbikitsidwa

Njira yotsitsimutsa ndi njira yabwino yoperekera madzi opangira ma ore kapena sulfide ore calcines. Njira imeneyi imagwiritsa ntchito njira ya sulfuric acid kuti ilowetse miyalayo mu thanki lotayira lomwe lili ndi chipangizo choyambukira. Chifukwa cha kugwedezeka kokwanira, kuthamanga kwa leaching kumathamanga, ndipo kuchuluka kwa leaching kumakhala kwakukulu.

Njira zodziwikiratu za njira yolimbikitsira leaching ndi izi:

1. Ore amaphwanyidwa kukhala particles zabwino (-75um accounting 90%) ndiyeno amawonjezedwa ku thanki ya leaching.

2. Analimbikitsa leaching ikuchitika ndi ali ndi moyikirapo sulfuric acid njira. Kuphatikizika kwa mkuwa mu njira ya leaching ndikokwera kwambiri ndipo kumatha kugwiritsidwa ntchito mwachindunji pakupangira electrowinning yamkuwa.

3. The leaching solution amapatsidwa chithandizo chotsatira kuti apeze golide ndi siliva.

Kutsiliza

Kuchiza sulfure ndi mkulu-arsenic golide ores kumafuna kukhazikitsidwa kwa njira yapadera umayenda bwino kuchira mlingo wa golide ndi siliva ndi kuchepetsa zotsatira zachilengedwe. Njira yowotchera okosijeni, njira ya thiourea leaching, mulu wa leaching, ndi njira yotsitsimula ndi njira zochizira.