Iyo Huru nzira yeAgitation Cyanidation Leaching muMigodhi yeGoridhe

ziviso

Cyanidation leaching, iyo yakashandiswa mukugadzirwa kwemaindasitiri kubvira 1887. iminerari Leaching Process iyo inoshandisa Cyanide mhinduro semaajenti ekubvisa goridhe nesirivheri kubva mugoridhe nesirivha-ine zvicherwa zvicherwa. Agitation cyanidation leaching ndiyo imwe yenzira dzakakosha mucyanidation leaching, uye inoshandiswa zvakanyanya muindasitiri yekuchera goridhe.

Nheyo yeAgitation Cyanidation Leaching

Cyanide, zvakadai Sodium Cyanide (NaCN), chinhu chakakosha reagent mukuita cyanidation. Sodium cyanide ikristaro isina ruvara uye yakajeka, kazhinji ine grey-yellow nekuda kwekusachena. Inonyungudika zvakanyanya mumvura, ine solubility mumvura inopfuura 20%. Kana iyo pH yemushonga wayo wemvura yaiswa acidified kusvika pH = 7. cyanide inenge yaparara kuita gasi rinoputika rehydrogen cyanide, rinova gasi risina ruvara uye rine muchetura zvakanyanya. Mumhinduro, hydrogen cyanide iasidhi isina simba, yakaoma kuita ionize, uye haina mhedzisiro yegoridhe nesirivheri. Kana iyo pH kukosha iri 12. iyo cyanide mumushonga inopotsa yaparadzana zvachose kuita cyanide ions. Naizvozvo, iyo cyanidation oparesheni inofanirwa kuitwa mune alkaline svikiro.

Kazhinji, pamberi peokisijeni, iyo cyanidation leaching yegoridhe ndeye electrochemical corrosion process. Cyanide inopindirana negoridhe munzvimbo ine alkaline nekutora chikamu kweokisijeni, ichiita inonyungudika nemvura yegoridhe cyanide complexes, zvichigonesa kunyungudika kwegoridhe kubva mumatombo.

Maitiro eAgitation Cyanidation Leaching

1. Gadziriro yeLeaching Raw Materials

• Kupwanya: Chicherwa chegoridhe simbi chinotanga chaiswa mudhishi rekupwanya. Kupwanya kwacho kunokamurwa kuita zvekupwanya, kudzvanya zviri pakati nepakati, nekupwanya. Mashizha eshaya uye makoni anopwanya anowanzo shandiswa pakupwanya nepakati, kunyanya kutyora zvidimbu zvihombe zveore kuita zvidimbu zvidiki, kazhinji nehukuru hwechikamu chinodzorwa pamasendimita mashoma. Hammer crushers dzinonyanya kushandiswa pakupwanya kwakanaka.

• vachikuya: Ore yakapwanyika inopinda muguyo yebhora kuti iwedzere kukuya kusvika pakukura kwakakodzera. Kazhinji, zvinodikanwa kuti ore particle size isvike -200 mesh accounting ye60% - 90%, kuitira kuti zvicherwa zvegoridhe zvisiyane zvachose. Kazhinji, zvigayo zvemhando yemabhora anoshandiswa pakukuya, uye zvigayo zvemhando yekufashukira zvinoshandiswa pakukuya zvakanaka.

• Slurry Kugadzirira: Iyo simbi yevhu inopinda mutangi inomutsa. Huwandu hwakakodzera hwemvura hunowedzerwa kugadzirisa ore pulp concentration, kazhinji inodzorwa pa30% - 50%. Panguva imwecheteyo, zvigadziriso zvakadai seraimu zvinowedzerwa kugadzirisa pH kukosha kwe ore pulp kusvika 10 - 11. kugadzira alkaline nharaunda inoita kuti cyanidation leaching uye inhibiting kuparara kweimwe tsvina.

2. Agitation Cyanidation Leaching

• Leaching Reagent Kuwedzera: Cyanide agents akadai sodium cyanide (NaCN) kana potassium cyanide (KCN) inowedzerwa kune yakagadziriswa ore pulp. Mumamiriro ezvinhu akazara, cyanide inopindirana nekemikari negoridhe kuti igadzire goridhe rinonyungudika nemvura.

• Leaching Equipment: Iyo leaching maitiro inowanzoitwa mune akawanda akateedzana-akabatana agitation matangi. Iwo matangi ekuzunguza anogona kupatsanurwa kuita marudzi matatu zvichienderana nenzira dzakasiyana dzekusanganisa: akadzvanywa mhepo yekuzunguza matangi, mechanic agitation matangi, kana akasanganiswa agitation matangi.

• Leaching Conditions: The concentration of Sodium cyanide mune ore pulp kazhinji 0.02% - 0.1%. Lime inowedzerwa panguva yekushanda kuita ore pulp pH = 9 - 12. Mhepo inozadzwa kuchengetedza chiyero chakanakisisa pakati peiyo yakanyungudutswa oksijeni concentration uye sodium cyanide concentration mu ore pulp. Nguva yekuchenesa inowanzoita maawa 24 - 48 kuona kuti goridhe ranyungudika zvizere.

3. Solid-Liquid Separation uye Washing

• Solid-Liquid Separation: Mushure mekudonha, iyo ore pulp inoiswa pasi-yakasimba-yemvura kupatsanurwa kuburikidza nemidziyo yakaita seyakakora uye mafirita kuti iwane goridhe-ine pamuviri mhinduro uye leaching inosara. Vachembera vanoshandisa musimboti wegiravitional sedimentation kuita kuti zvimedu zvakasimba muore pulp zvigadzikane pasi, uye iyo supernatant ndiyo ine goridhe-inotakura pamuviri mhinduro. Mafirita anowedzera kusefa kuyerera kweiyo thickener kuti ivandudze mhedzisiro yekuparadzaniswa kwakasimba-mvura.

• Washing: Kuti uwane kupatsanurwa kwakakwana pakati pecyanide leachate uye yakasara yeleach, nzira yekugeza ye 3 - 5 matanho ekukora, kusefa, kana musanganiswa wezviviri izvi zvinowanzo shandiswa. Uku ndiko kushanda kwakakosha kwecyanidation leaching. Iyo inowanzoshandiswa nzira ndeye inoenderera mberi countercurrent decantation nzira (CCD nzira). Iwo makobvu anoshandiswa mune iyi nzira anogona kukamurwa kuva imwechete-layer uye akawanda-layer marudzi. Mazhinji ma cyanidation concentrators muChina anoshandisa 2 - 3 - layer thickeners yekupatsanurwa kwakasimba-mvura uye kuenderera mberi kwekugeza.

4. Goridhe Recovery

• Zinc Powder Displacement Method: Zinc poda inowedzerwa kune goridhe-inotakura pamuviri mhinduro. Zinc inopindirana neiyo goridhe cyanide yakaoma mukuchinja-chinja, ichidzikisa goridhe kuita goridhe resimbi uye inonaya. Mushure mekusefa, dhaka regoridhe rinowanikwa, uye dhaka regoridhe rinonyungudutswa nenzira dzakaita sekunyungudika kuti vawane goridhe risina kuchena.

• Yakashandiswa Carbon Adsorption Method: Activated kabhoni inowedzerwa kune ine goridhe-inotakura pamuviri mhinduro, uye iyo yegoridhe cyanide yakaoma inoshongedzwa neiyo activated kabhoni. Ipapo, goridhe rinodzoserwa kubva kune yakabatidzwa kabhoni kuburikidza nemaitiro akadai se desorption uye electrowinning. Iyi nzira inogona kukamurwazve kuita kabhoni-in-pulp nzira (CIP) uye kabhoni-in-leach nzira (CIL).

• CIP Maitiro: Chekutanga, cyanidation leaching inoitwa, uye ipapo activated kabhoni inowedzerwa kune ore pulp kuti adsorb goridhe. MuCIP maitiro, leaching uye adsorption maviri akazvimirira mashandiro. Mukushanda kweadsorption, iyo leaching process yakanyatso kupedzwa, uye saizi, huwandu, uye mamiriro ekushanda ematangi eadsorption anotemerwa neadsorption paramita.

• Nhoroondo ye CIL: Activated carbon inowedzerwa kune leaching tank, uye leaching uye adsorption inoitwa panguva imwe chete, kureva, leaching uye adsorption inoitika panguva imwe chete. Mukuita kweCIL, iyo leaching uye adsorption mashandiro anoitwa panguva imwe chete. Kazhinji, kushanda kweleaching kunoda nguva yakareba kupfuura iyo adsorption operation. Naizvozvo, saizi, aeration, uye dosing yetangi inotemwa neleaching paramita. Sezvo chiyero chekushambadza chiri basa rekusangana kwegoridhe rakanyungudika mumhinduro, kuitira kuti iwedzere kuwanda kwegoridhe rakanyungudutswa kumberi - chikamu adsorption matangi uye panguva imwe chete ichiwedzera nguva yeleaching, 1 - 2 nhanho dzepre-leaching dzinowanzowedzerwa isati yadonha uye adsorption.

5. Tailings Kurapa

Matanho mushure Goridhe Recovery kazhinji ine zvimwe zvitsama zvecyanide yakasara uye humwe hutsvina. Nekuda kwekuchengetedzwa kwezvakatipoteredza zvinodiwa, matailings anofanirwa kubatwa nemazvo. Nzira dzekurapa dzakajairika dzinosanganisira nzira dzemakemikari oxidation (senge sulfur dioxide - mhepo nzira), kuora kwechisikigo, kana biodegradation nzira dzekudzikisa huwandu hweinosara cyanide kusvika pasi peiyo yenyika uye kudzivirira kusvibiswa kwezvakatipoteredza. Iyo yakabatwa miswe inogona kuraswa ne stacking kana dzimwe nzira dzakakodzera.

mhedziso

Agitation cyanidation leaching inzira yakakosha mukutorwa kwegoridhe kubva mugoridhe. Kuburikidza nenhevedzano yemaitiro senge gadziriro yezvakagadzirwa, kubvongodza leaching, kupatsanurwa kwakasimba - kwemvura, kudzoreredza goridhe, uye kurapwa kwematehwe, goridhe rinogona kuburitswa kubva mugoridhe ores. Nekudaro, nekuda kwehupfu hwecyanide, mukuita kwekushandisa Agitation Cyanidation Leaching, kutariswa kwakanyanya kunofanirwa kubhadharwa kune kuchengetedzwa kwekugadzirwa uye kuchengetedzwa kwezvakatipoteredza kuti ive nechokwadi chekusimudzira budiriro yeindasitiri yezvicherwa zvegoridhe.