ʻO ka Cyanide Sodium Heap Leaching Project o kahi Oxidized Gold Ore ma Senegal

He lua gula ma Senegal kahi ʻeli gula oxidized haʻahaʻa me kahi papa gula o 2.49 g/t. Ua hana ʻia ka noiʻi hale hana me ka hoʻohana ʻana i ke kaʻina hana leaching puʻu . Ua noiʻi ʻia nā hopena o nā ʻano hana e like me ka nui o nā ʻāpana ore, nā ʻano a me nā dosages o nā mea leaching, ka manawa leaching, a me nā ʻano a me nā dosages o nā oxidants kōkua ma ka unuhi gula. Ua hoʻoholo ʻia nā kūlana kūpono, e hoʻokō ana i ka helu leaching gula o 89.57% a me kahi papa gula i ke koena leaching o 0.26%. Hāʻawi kēia mau hopena i kahi kumu loea hilinaʻi no ka hoʻomohala kūpono a me ka hoʻohana ʻana i kēia ore.

1. Na Waiwai Ore

He 2.49 g/t ka helu gula o ka ʻai maka, ʻo ia ka mea nui e hiki ke hoʻihoʻi ʻia. ʻO ka helu kālā he 4.26 g/t, me kahi haʻahaʻa haʻahaʻa. ʻO ka mea haumia nui i loko o ka ʻeleʻele ʻo SiO₂, a ukali ʻia e nā mea liʻiliʻi o Al a me Fe. ʻO ka mea ʻino nui ka arsenic, me ka helu arsenic o 0.68%. He haʻahaʻa loa nā māka o nā mea ʻē aʻe. ʻO nā minelala metala nui i loko o ka ʻiʻa he limonite, a he kakaikahi loa nā mineral sulfide, ʻo ka pyrite ka nui. ʻO nā minerala gangue ka nui o ka quartz, feldspar, a me nā minerala pālolo.

ʻO kēia mine gula he ʻeleʻele oxidized ikaika loa me kahi ʻano wehe, ʻo ka hapa nui ma ke ʻano o nā ʻāpana haʻihaʻi a me ka lepo. Hōʻike ka Petrographic identification i ka hapa nui o ka pyrite i loko o ka ʻeleʻele ma ke ʻano o nā hua euhedral, i hoʻokomo ʻia i ka quartz, feldspar, a me ka chlorite. ʻOi aku ka maikaʻi o ka nui o ka ʻāpana, mai ka 0.02 a 0.4 mm. ʻIke ʻia ʻo Limonite ma ke ʻano he pseudomorph o pyrite a i ʻole colloidal limonite i hana ʻia e ka condensation o ka solution ferric hydroxide i hui pū ʻia me kahi liʻiliʻi o nā minela pālolo silicate, e hoʻopiha ana i nā māwae o nā minerala gangue. Loaʻa ka Quartz ma ke ʻano he metacolloidal chalcedony quartz, me ka nui o nā ʻāpana mai ka 0.02 a 0.15 mm. Aia ʻo Feldspar ma ke ʻano o nā ʻano huaʻai ʻole a i ʻole nā ​​​​hui, me ka nui o ka nui o ka 0.02 a 0.3 mm. ʻO nā minelala gula i loko o kēia ʻeleʻele ka nui o ka nui o nā ʻāpana, no ke gula maikaʻi o -0.001 mm.

2. Nā ʻano hoʻāʻo

Ua ninini ʻia ka ʻai maka i kuʻi ʻia i kahi nui o ka ʻāpana i loko o kahi pahu cylindrical i piha i ka pōhaku moe. Ua hoʻopaʻa ʻia ka lakio wai-paʻa ma 1.5:1. Ua hoʻohui ʻia ka lime e hoʻoponopono i ka waiwai pH i ʻoi aku ma mua o 11. a ua hoʻohui ʻia kekahi nui o ka Sodium cyanide . Ua hana ʻia ka leaching ma ka mahana o ka lumi no kekahi manawa. Ma hope o ka hoʻāʻo ʻana, ua ninini ʻia ka pulp no ka hoʻokaʻawale ʻana i ka wai-paʻa. Ua kālailai ʻia ka nui o ke gula i loko o ke koena leaching a me ka nui o ke gula i loko o ka hopena gula, a ua helu ʻia ka helu leaching gula.

3. Nā hopena ho'āʻo a me ka nānā ʻana

Ma muli o nā ʻano o nā waiwai o ka ʻai maka, ua hana ʻia kahi hoʻohālikelike ma waena o ʻelua mau hoʻolālā hoʻāʻo: ka hoʻokuʻu ʻana i ka cyanidation mud-holo a me ka hoʻokuʻu ʻana i ka puʻu. ʻO nā kūlana hoʻāʻo no ka cyanidation mud-holo penei: ka maikaʻi o ka wili ʻana o -0.074 mm 95%, ka lakio wai-paʻa o 3:1. ka hoʻoulu ʻana i ka mīkini, a me ka manawa hoʻokuʻu he 24 hola. ʻO nā kūlana hoʻāʻo no ka hoʻokuʻu ʻana i ka puʻu penei: ka nui o ka ʻāpana ʻai o -10 mm, ka lakio wai-paʻa o 1.5:1. a me ka manawa hoʻokuʻu he 72 hola.

Ma ka hoʻohana ʻana i ke kaʻina hana leaching heap, ʻo 70.89% ka nui o ka leaching gula. Ke hoʻohana nei i ke kaʻina hana cyanidation lepo holoʻokoʻa, ua hoʻonui iki ʻia ka nui o ka leaching gula i 74.05%. Ma ka noʻonoʻo ʻana i ke kumukūʻai hana, ua hoʻohana ʻia ke kaʻina hana leaching heap i ka hoʻāʻo e hoʻihoʻi i ke gula.

4. Nā hopena

(1) ʻO ka ʻai gula he ʻokiʻoki ʻia i hana ʻia e ka weathering, me ka helu gula o 2.49 g/t, ʻo ke gula maikaʻi loa o -0.001 mm. Ua kūpono ka ʻai no ka mālama ʻana ma ke kaʻina hana leaching cyanidation.

(2) Ma o nā hoʻāʻo kūlana leaching puʻu, ua hoʻoholo ʻia nā palena hana leaching puʻu kūpono e like me kēia: ka nui o ka ʻāpana ore o -20 mm, ka nui o ka Sodium Cyanide o 2.0 kg/t, ka nui o ka calcium peroxide o 4.0 kg/t, a me ka manawa leaching o 10 mau lā. ʻO nā helu hoʻokaʻawale i loaʻa he helu leaching gula o 89.57% a me ke ʻano gula i ke koena leaching o 0.26%.

ʻO ka hope, ʻike ka mea kūʻai aku i kā mākou hopena hōʻike. Ma hope o ke kamaʻilio ʻana me ka mea kūʻai aku, ua hoʻouna ʻia nā laʻana, a ua hoʻokō ʻia kahi ʻano o nā hoʻokolohua pōmaikaʻi. Ma o ka hoʻohālikelike hoʻohālikelike, ua hoʻoponopono ʻia kahi kahe kaʻina kūpono no ke kūlana maoli no kēia papahana hoʻoheheʻe puʻu.

I kēia manawa, ke holomua nei ka papahana. I loko o kekahi mau mahina, e hoʻopau ʻia kahi mea kanu leaching puʻu.

Ua hana maikaʻi ka papahana leaching puʻu o kahi ʻai gula oxidized ma Senegal i ka hāpai ʻana i ka hoʻomohala ʻana o nā mina gula ma Senegal. ʻO ke kaʻina holoʻokoʻa o kēia papahana, mai ka noiʻi hoʻomaikaʻi ʻana, ka hoʻolālā pā hale, ka hōʻea ʻana mai o nā lako, ka hoʻokomo ʻana a me ka hoʻonohonoho ʻana, ka hoʻomaʻamaʻa limahana, a hiki i ka hana ʻana o ka mea kanu leaching puʻu, ʻo ia ke kuleana o United Chemical ʻOihana a ua hiki i nā kūlana hana.

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