Kuvandudza Cyanidation yeGoridhe Kubviswa kubva kuRefractory Ores

Muindasitiri yekuchera goridhe, kuburitsa goridhe kubva mumatombo anodzivirira goridhe kunounza matambudziko makuru. Matombo anodzivirira goridhe, ayo anoratidzwa nekusakwana kwekuwana goridhe pasi pemamiriro echinyakare ekubvisa cyanide , ave chikamu chakakosha chepfuma yegoridhe sezvo huwandu hwematombo anoshandiswa zviri nyore huchiderera. Goridhe mumatombo akadaro rinowanzova mumamiriro ekupararira muzvicherwa zvesulfide, kunyanya pyrite nearsenopyrite, zvichiita kuti zviome kuwana mhinduro dzecyanide.

Kunzwisisa Dambudziko reRefractory Ores

Kusakwanisa kwematombo aya kuchinjika kunanga kuCyanidation kunonyanya kukonzerwa nekuiswa kwegoridhe muchimiro chakasimba chezvicherwa zvesulfide. Kuvharwa uku kunodzivirira cyanide kuti isashande zvakanaka negoridhe, zvichikonzera kudzoreredzwa kwakaderera. Nekuda kweizvozvo, nzira dzakakosha dzekugadzirisa dzinodiwa kuti goridhe riwedzere kuburitswa kubva mumatombo aya asingashande.

Pretreatment Technologies yeRefractory Ores

Oxidative Roasting

Kugocha ne oxidative kwave kuri imwe yenzira dzechinyakare dzekugadzirisa goridhe rine sulfide. Munguva iyi, sulfides dzine gold-bearing dzinogocha kuita oxides dzine porous, izvo zvinoita kuti cyanide solutions ipinde zviri nani. Zvisinei, nzira iyi ine zvimwe zvipingamupinyi. Inotungamira mukusvibiswa kwezvakatipoteredza kuburikidza nekubuda kwearsenic nesarufa mumagasi. Kudiwa kwekurasa arsenic trioxide ine chepfu yakanyanya inyaya huru. Pamusoro pezvo, kuumbwa kwemakemikari anonyunguduka zvishoma uye kubviswa kwegoridhe muarsenic sublimates panguva yekugocha kunogona kuderedza kushanda kweGold extraction . Semuenzaniso, mune mamwe mabasa ekare ekugocha, mwero wekubviswa kwegoridhe kubva mu refractory ores unogona kungowedzera kubva pa46.6% (direct cyanidation ye flotation concentrate yekutanga) kusvika pa85% mushure mekugocha.

Bhakitiriya Oxidation (Biox)

Bacterial oxidation ndiyo imwe nzira ine hushamwari kwezvakatipoteredza. Mukuita uku, mamwe mabhakitiriya anoshandiswa kuita oxidize zvicherwa zve sulfide, kuputsa matrix anofukidza goridhe. Izvi zvinoita kuti goridhe riwanike ku cyanide. Zvakanakira tekinoroji iyi zvinosanganisira kusavapo kwehupfu hwegasi. Arsenic inobviswa kubva pakuita muchimiro chepasi-chepfu arsenate yesimbi. Ongororo dzekuyedza dzakaratidza kuti kushandiswa kweBiox tekinoroji kunogona kuwedzera kutorwa kwegoridhe kusvika pa91.74% kubva kune refractory flotation concentrates, inova budiriro huru kana ichienzaniswa neyakananga cyanidation.

Autoclave Oxidation (Pox)

Autoclave oxidation inosanganisira kuisa ore concentrate kune yakakwirira - tembiricha uye yakakwirira-kumanikidza mamiriro pamberi peokisijeni. Iyi nzira inonyatso oxidize iyo sulfide minerals. Preliminary autoclave oxidative leaching yeflotation concentrate inogona kupa kudzoreredza kwakakwira kwegoridhe nekuzotevera cyanidation, kazhinji padanho re94.9 - 96.5%. Iyi nzira inopa mazinga akakwira ekuchera uye chinhu chakakosha mukusimbisa tekinoroji maitiro, kuvandudza kuchengetedzwa kwemaindasitiri emabhizinesi ekugadzira goridhe, uye kuwedzera mamiriro ekushanda evashandi vekugadzira.

Additives uye Basa Ravo muCyanidation

Cyanide - Kuderedza Additives

Cyanide ndiyo inonyanya kushandiswa mukutora goridhe, asi kushandiswa kwayo kwakanyanya hakungo wedzera mutengo chete asiwo kunoisa njodzi dzakakomba kunharaunda uye hutano hwevanhu. Extractech, yekuwedzera biopolymer inotorwa kubva kune algae, yakagadziridzwa kugadzirisa nyaya iyi. Kana yawedzerwa kune cyanidation process, inogona kuita senge super-oxidant. Iyo inotyora zvisungo zveakakwira - oxidation - kuderedza - inogona (ORP) zvicherwa mune refractory ores. Kemikari inoitika nezvidimbu zvegoridhe, zvichisiya goridhe iri pachena kuti riite necyanide. Sekuwedzera kune iripo cyanidation process, Extractech inogona kuderedza kushandiswa kwecyanide kusvika pa20 - 30% ichiwedzera goho regoridhe ne3 - 5%.

Zvimwe zvinowedzera

Zvimwe zvinowedzera zvinogona kushandiswa kuwedzera cyanidation process. Semuyenzaniso, zvimwe zvinowedzera zvinogona kuwedzera "inoshanda inoshanda okisijeni" zviri mukati mepulp, izvo zvinobatsira kune cyanidation reaction. Ivo vanogona zvakare kuve nemabasa akadai sekupararira, kubatsira kuparadzira zvizere pulp uye kuwedzera kunoshanda kunobata pakati pecyanide negoridhe. Pamusoro pezvo, vanogona kunge vaine kusachena-kubvisa basa, kubvisa kana kunetesa mhedzisiro yetsvina mupulp pane goridhe leaching. Chelating additives inogona kuwedzera kunyungudika kwegoridhe uye kubvisa kusachena zvinhu zvinokanganisa goridhe leaching.

Process Optimization muCyanidation

pH Kudzora

Cyanide mu pulp inosangana ne hydrolysis reaction, inogadzira HCN, chikamu chayo chinoputika kubva mumhinduro, zvichikonzera kurasikirwa kwecyanide uye kusvibiswa kwezvakatipoteredza. Munguva yecyanide leaching, mhinduro inofanirwa kuchengetedza imwe alkalinity kudzivirira kuora kwe cyanide. Nekudaro, kana iyo alkalinity yemushonga wecyanide yakanyanya kuwanda, inoderedza kunyungudika kwegoridhe. Naizvozvo, kunyatso kudzora pH kwakakosha pakuita cyanidation inoshanda.

Leaching Time

Sezvo nguva yekudonha ichiwedzera, chiyero chegoridhe chekutengesa chinotanga kukwira. Nekudaro, mushure meimwe pfungwa, kuwedzera kuwedzera nguva yeleaching hakuwedzere zvakanyanya kuwanda kwegoridhe. Nekudaro, zvinodikanwa kuve nechokwadi chenguva yakakodzera yeleaching kuti uwane inoshanda kudhirowa kwegoridhe pasina kufanira kushandiswa kwezviwanikwa uye nguva.

Okisijeni Kupa

Kushandiswa kweoxidants seyakachena okisijeni kana mamwe maokisi mukuita leaching kunogona kuvandudza nharaunda yeleaching. Semuenzaniso, muokisijeni - resin leaching process, kuwedzerwa kweokisijeni kunogona kunyatso wedzera chiyero chegoridhe nesirivheri, kukurumidza kukurumidza leaching, kupfupisa nguva yekucheka, uye kuderedza kushandiswa kwecyanide uye lead nitrate.

mhedziso

Kuvandudza cyanidation maitiro ekutorwa kwegoridhe kubva kune refractory ores kunoda musanganiswa weakakodzera matekinoroji ekugadzirisa, kushandiswa kwezvinowedzera zvinoshanda, uye chaiyo maitiro ekugadzirisa. Nzira dzekugadzirira senge bhakitiriya oxidation uye autoclave oxidation inopa dzimwe nzira dzine hushamwari uye dzinoshanda zvichienzaniswa nekugocha kwechinyakare. Zvinowedzerwa zvinogona kuita basa rakakosha mukuderedza kushandiswa kwecyanide uye kuwedzera kudzoreredza goridhe. Nekunyatso kudzora maparamendi akadai sepH, nguva yekuregedza, uye kupihwa kweokisijeni, indasitiri yemigodhi yegoridhe inogona kuvandudza kugona kwekubvisa kweanopokana ores, ichiita kuti nzira yekubvisa irambe yakasimba uye iite zvehupfumi.