Tsvagiridzo yePretreatment Technologies yeGoridhe Inotarisa pamberi peCyanide Leaching

Kubvisa goridhe kubva muCyanide ibasa rekare rekubvisa goridhe. Zvisinei, nekuda kwekuoma kwemaore, Pretreatment inowanzo dikanwa kuti ivandudze mashandiro ekubvisa goridhe. Chinyorwa chino chinotarisa matekinoroji ekugadzirisa goridhe risati rasvika , nechinangwa chekupa ruzivo rwekugadzira goridhe.

I. Physical Pretreatment Technologies

1. Kukuya zvakanaka

Midziyo yegoridhe inodzika kusvika pa325 mesh kana kuti yakatsetseka kuburikidza nemidziyo yakaita semabhora ezvigayo kuti asiyanise zvizere zvicherwa zvegoridhe kubva ku gangue. Chiitiko mune mumwe mugodhi wegoridhe chinoratidza kuti kukuya zvakanaka kunogona kuwedzera nzvimbo yegoridhe ne40%, uye iyo leaching rate inogona kuwedzerwa ne8-12%.

2. Kuongorora uye Kubvisa Kusachena

Midziyo yakaita sema "linear vibrating screens" inoshandiswa kubvisa tsvina yakaita sehuni nezvidimbu zvepurasitiki. Mucherechedzo wekushandiswa kwe "concentrator" unoratidza kuti mushure mekuongororwa, kuvharika kwemidziyo kunoderedzwa ne70%, uye kurasikirwa kwe "cyanide" mu "adsorption " kunoderedzwa ne5%.

3. Flotation Reagent Kubviswa

Kune flotation concentrates, nzira ine matanho maviri ye "regrinding - removal reagent" inoshandiswa kubvisa zvinobudirira flotation reagents dzakadai se xanthate nemafuta Nhamba 2. Ruzivo rwemaindasitiri runoratidza kuti mushure mekubvisa reagent, kushandiswa kweSodium Cyanide kunoderedzwa ne35%, uye mwero we adsorption we activated Carbon unowedzerwa ne15%.

II. Chemical Pretreatment Technologies

1. Alkaline Pretreatment

Lime inowedzerwa kugadzirisa pH kusvika 10-11. zvekuti zvinhu zvinokuvadza zvakaita sezingi, arsenic, uye antimony zvinoumba munyu unonyungudika. Mushure mekushandiswa kwayo mune imwe arsenic-ine mugodhi wegoridhe, kushandiswa kwecyanide kunoderedzwa kubva pa12 kg / t kusvika 6.5 kg / t, uye chiyero cheleaching chinowedzerwa ne9%.

2. Oxidation Pretreatment

• Air Oxidation

Nekufefetedza uye nekukurudzira kuti oxidize zvinhu zvinodzikisa, mune imwe pyrrhotite-mhando yegoridhe mugodhi, mushure mekutanga kurapwa, iyo pulp inogona inowedzera kubva -150 mV kusvika +200 mV, uye nguva yecyanidation inopfupikiswa ne40%.

• Kuwedzera kweOxidants

Kana chiyero che lead nitrate chiri 0.5 kg/t, huwandu hwe sulfide ions hunogona kuderedzwa ne60%, uye leaching rate inowedzera ne7%. Mune imwe copper-gold ore, kushandiswa kwe sodium cyanide kunoderedzwa ne40% mushure mekurapwa ne hydrogen peroxide.

3. Synergistic Leaching neammonia-Cyanide

Mvura yeammonia (ine kusanganiswa kwe1-3%) inowedzerwa kune mhangura-ine goridhe inogadzirisa kuti iite yakagadzikana ammonia complexes yemhangura. Bvunzo dzemaindasitiri dzinoratidza kuti mwero wemhangura wemhangura unogona kudzorwa pazasi pe5%, uye mwero wegoridhe unowedzerwa ne12%.

III. Biological Pretreatment Technologies

Zvipembenene zvakadai seThiobacillus ferrooxidans zvinoshandiswa kuparadza zvicherwa zve sulfide. Mushure memazuva makumi maviri eiyo biological oxidation mune mumwe mugodhi wegoridhe unopokana, mwero wekuparara kwepyrite unosvika 20%, uye goridhe rinowedzera kubva pa92% kusvika 35%. Iyi tekinoroji ine mukana wekushamwaridzana kwezvakatipoteredza, asi nguva yekurapa yakareba (88-15 mazuva).

IV. Mazano eKusarudza Maitiro

Iyo pretreatment process inoda kusarudzwa zvizere zvichienderana nemhando yeore:

• Kune zvicherwa zvine sarufa yakakwira uye yakakwira arsenic, biological oxidation kana kugocha pretreatment inofanirwa kugamuchirwa.

• Kune mhangura-ine goridhe inotarisa, iyo ammonia-cyanide system inokurudzirwa.

• Kune flotation inotarisa, reagent kubvisa kurapwa kunoda kusimbiswa.

• Kune zvakajairwa ores, nzira yakasanganiswa yealkaline leaching uye oxidant yekuwedzera inogona kugamuchirwa.

mhedziso:

Iko kunzwisisika kushandiswa kwe pretreatment matekinoroji kunogona kuvandudza zvakanyanya cyanide leaching maitiro. Mune ramangwana, zvinodikanwa kuenderera mberi nekudzidza zvinobudirira uye zvakaderera-kushandisa zvakasanganiswa pretreatment maitiro kusimudzira kukura kwegirinhi kwematekinoroji ekubvisa goridhe.