Te Tikanga Tango Koura Cyanidation me te Whakakapi Paura Konutea

Ko te tukanga tango koura Cyanidation tuku iho he toru ngā tikanga matua: te tango wai, te horoi, me te whakakapinga (te ua).

1. Te rewa

Ko te rewharewha te tikanga ka memeha te koura totoka i roto i te ore ki roto i te wairewa cyanide kei roto. I tenei wa, mo te mahi, mo nga taputapu, mo te whakahaere me te mahi, kua piki ake te mohio o tenei mahi. Ka rite ki te korero i mua ake nei, ko te whakakorenga o te koura i roto i te hāora - he wairewa cyanide kei roto ko te tikanga he tukanga waikura hiko.

I te wā o te tukanga whakarewa, e rua ngā momo matū matua e whakamahia ana: Ngā cyanides me ngā kawakore tiaki.

(1) Cyanides

I roto i te ahumahi, ko ngā cyanide e whakamahia whānuitia ana mō te tango i te cyanidation ko te potassium cyanide (KCN), te Sodium cyanide (NaCN), te calcium cyanide [Ca(CN)₂], me te ammonium cyanide (NH₄CN).

Ko te konutai cyanide te konutai e whakamahia whānuitia ana i roto i te hanga. He paura ma tino paitini, ā, ko te Konutai Cyanide arumoni ka pēhia kia porowhita, kia poraka rānei.

I roto i te ahumahi, ka whakamahia hoki te rewa cyanide hei matū horoi. He ranunga i hangaia mā te whakarewa i te ranunga o te konupūmā cyanide, te tote, me te kōka i roto i te oumu hiko. Haunga te 40% - 45% o te Ca(CN)₂ me te NaCN, kei roto hoki ētahi poke e kino ana ki te tukanga cyanidation, pērā i ngā sulfide wairewa, te waro, me ētahi poke kore wairewa. Ko tōna painga ko tōna utu iti, engari he nui te horopeta, tata ki te 2 - 2.5 ngā wā o te konutai cyanide . Hei whakakore i te awe o ngā poke kino, me whakahaere te maimoatanga i mua i te whakamahinga o te rewa cyanide. Ko ngā tikanga maimoatanga ko te whakaoho kaha ki te hau, te tāpiri rānei i te nui o te tote mata ki te otinga.

Ko te tikanga, ko te 0.5g anake o te konutai cyanide hei memeha 1g o Au. Heoi, i roto i nga mahi hanga, ko te kai o te cyanide he 20 - 200 nga wa te nui o te whakaaro, he nui ake ranei. Ko te nui o te kai ka whakawhirinaki ki te ihirangi o etahi atu waahanga i roto i te ore ka tauhohe ki te cyanide.

2. Horoi

Ko te horoi te tikanga o te whakamahi wai hei horoi i te mata o nga matūriki ore me te koura memeha i waenga i nga matūriki ore ki te whakatutuki i te wehenga totoka - te wai hei whakaora i te otinga kei roto i te koura i muri i te rewa.

3. Whakakapinga

Ko te whakakapinga ko te tukanga whakamahi i te paura konutea hei whakaiti me te whakapūtā i te koura mai i te wairewa kei roto te koura, ā, ka whakahokia mai te koura. Mai i te rautau 20, ko te whakaora i te koura mai i te penupenu cyanide ko te horoi tuatahi i te penupenu, kātahi ka whakamārama me te tango hau i te wairewa kua hapu. Ko te whakapūtā o te koura mai i te wairewa kua whakamāramahia kua whakamahia tonutia te tikanga whakakapinga paura konutea . Mai i te tekau tau atu i 1960, kua tere te whanaketanga o te "tikanga waro-i-roto-i-te-penu" o te tāpiri waro whakahohe ki te penupenu. I te rangahau mō te whakamahinga o ngā whakawhiti katote, he uara mahi nui anō hoki te tikanga whakamahi i ngā kapia whakawhiti katote hei mimiti i te koura mai i ngā wairewa cyanide, i te penupenu cyanide rānei. Kua mahia hoki ētahi rangahau mō te tango whakarewa o te koura mai i ngā wairewa cyanide. Ina tāpirihia te waikawa whanariki ki te wairewa cyanide kei roto te koura, ka taea te whakamahi i te waipiro isoamyl hei tango i te koura, ā, ka piki ake te tere tango me te pikinga o te kukū waikawa whanariki. Hei tauira, i te tangohanga i roto i te wairewa waikawa whanariki 2mol/L, ka taea hoki te wehe i te koura mai i ngā poke pēnei i te arsenic me te rino. Kua tutuki ngā tohu tango pai mā te whakamahi i te oxyalkoxy phosphate hei tango koura mai i ngā otinga kawakore cyanate, ā, kua tutuki hoki ngā hua pai mā te whakamahi i te konutai whanariki mō te tango koura whakamuri, me ērā atu mea anō.

Hei whakamutunga, ko te tukanga tango koura cyanidation he hitori roa me te whanaketanga tonu. Ko nga tikanga rereke me nga reagents kei a raatau ake ahuatanga me nga ahuatanga tono, kei te tirotiro tonu te ahumahi me te whakahou ki te whakapai ake i te pai me te ohanga o te tangohanga koura i te wa e whakarite ana te tiaki i te taiao me te haumaru.