Iko Kubata Kwepamusoro-Kupisa Leaching paSodium Cyanide Kushandiswa

ziviso

Mu Kuchera Goridhe maitiro, Sodium Cyanide rinoshandiswa zvakanyanya seagent yeleaching nekuda kwekugona kwayo kugadzira macomplexes akatsiga negoridhe. Zvisinei, kushandiswa kwe sodium cyanide chinhu chakakosha chinokonzera kubudirira kwehupfumi uye kukanganisa kwezvakatipoteredza kwemabasa ekuchera goridhe. Kukwirisa-tembiricha leaching ndiyo imwe yenzira dzinoshandiswa kusimudzira kugona kwegoridhe kubva kune ores. Ichi chinyorwa chinotarisa mukukanganisa kwepamusoro-tembiricha leaching pakushandiswa kwe Sodium cyanide.

Basa reSodium Cyanide muGoridhe Leaching

Sodium cyanide inonangana negoridhe kana paine okisijeni kuumba zvinhu zvinonyunguduka zvinoita kuti goridhe ribviswe musimbi. Electrochemical calculations inoratidza kuti theoretically, 0.92 gramu ye sodium cyanide inodiwa kunyungudutsa 1 gramu yegoridhe. Nekudaro, mukugadzirwa chaiko kwemaindasitiri, kudyiwa kwesodium cyanide kwakakwira zvakanyanya kupfuura kukosha kweiyo theoretical, kazhinji 50 - 100 times more. Uyu mutsauko wakakosha unokonzerwa nezvinhu zvakasiyana-siyana zviripo mumamiriro ezvinhu ezvicherwa zvepasi rose, sekuita nemamwe maminerari mune ore uye makemikari maitiro anoitika panguva yekuvhiya.

High - Temperature Leaching Process

High -tembiricha leaching inoitwa patembiricha dzakakwirira, kazhinji pamusoro peyakajairika ambient tembiricha. Chinangwa chikuru ndechekuwedzera basa reion mune ore - leaching solution system. Nekuita izvi, inomhanyisa kuita pakati peiyo leaching agent, sodium cyanide, uye goridhe mukati meore. Semuyenzaniso, kana iri imwe goridhe refractory ores, yakakwirira-tembiricha leaching inogona kupaza yakaoma zvicherwa zvimiro zvakaputira goridhe, zvichiita kuti goridhe riwanikwe nyore kune cyanide ions kuti ibvise.

Mhedzisiro yePamusoro - Tembiricha Leaching paSodium Cyanide Kushandiswa

1. Kuwedzera muRection Rate

Pakupisa kwepamusoro, iyo kinetic simba reanoita mamorekuru anowedzera. Izvi zvinokonzeresa kudhumhana kwakawanda uye kwakasimba pakati pe sodium cyanide mamorekuru, mamorekuru eokisijeni, uye zvimedu zvegoridhe mu ore. Nekuda kweizvozvo, mwero wekunyungudika kwegoridhe musodium cyanide mhinduro inomhanyisa. Kana chiyero chekuita chichikurumidza, goridhe rakawanda rinogona kunyungudutswa panguva yeyuniti. Kana chinangwa chiri chekuburitsa huwandu hwakati hwegoridhe, yakakwirira-tembiricha leaching ingada ipfupi leaching nguva. Mune dzidziso, izvi zvinogona kuderedza kudyiwa kwesodium cyanide sezvo nzira yekumhanyisa inopera nekukurumidza, ichideredza nguva iyo sodium cyanide inoratidzwa kune izvo zvinokonzeresa kudyiwa kwayo.

2. Cyanide Hydrolysis

Cyanide inopinda kemikari inonzi hydrolysis mumhinduro, uye kukura kweiyi hydrolysis kunokonzerwa nekushisa. Sezvo tembiricha inokwira, iyo hydrolysis ye cyanide inova yakanyanya kujeka. Pa100 ° C, hafu ye cyanide ions inorasika, uye pa130 ° C, 85% yavo yakarasika. Iyi hydrolysis inogadzira hydrocyanic acid, iyo isingangotungamira mukurasikirwa nesodium cyanide asi zvakare inoisa njodzi yakakomba yezvakatipoteredza nekuchengetedza nekuti hydrocyanic acid igasi rine muchetura. Mupamusoro-tembiricha leaching, kana tembiricha isina kudzorwa zvakanaka, iyo yakawedzera hydrolysis ye sodium cyanide inogona kuwedzera zvakanyanya kushandiswa kwayo.

3. Kuita neAssociated Minerals

Ore zhinji dzegoridhe dzine mamwe mamineral, akadai sepyrite, pyrrhotite, uye copper sulfide. Aya maminerari anobatanidzwa anogona kuita ne sodium cyanide. Pakupisa kwepamusoro, maitiro ekuita pakati peaya asina goridhe-akatakura zvicherwa uye sodium cyanide anogona kuwedzera. Izvi zvinoreva kuti yakawanda sodium cyanide ichashandiswa kumusoro mukusangana nemaminerari aya, ichisiya shoma inowanikwa yekuita negoridhe. Pamusoro pezvo, kumwe kwekuita uku kunogona kuburitsa ne-zvigadzirwa zvinogona kuenderera mberi nekukanganisa maitiro egoridhe. Semuenzaniso, sarufa - ine makomisheni akaumbwa anogona kufukidza pamusoro pezvikamu zvegoridhe, kudzivirira maion ecyanide kubva pakusvika uye kuita negoridhe.

4. Solubility yeOxygen

Oxygen chinhu chakakosha mugoridhe - cyanide leaching reaction sezvo ichiita seoxidant. Zvisinei, kunyungudika kweokisijeni mumvura kunodzikira sezvo tembiricha inowedzera. Pa100 ° C, hapana oxygen yakanyungudika mumvura. Mupamusoro-tembiricha leaching, kana tembiricha yasvika painofashaira mvura, kushaikwa kweokisijeni yakakwana yakanyungudika kunogona kudzikamisa oxidation yegoridhe. Kugadzirisa iyo yakaderedzwa kunyungudika kweokisijeni, mamwe matanho akaita sekuwedzera mweya weokisijeni chikamu kana kushandisa mamwe maoxidants angave akadikanwa. Asi kana iyo oxygen inopa ikaramba isina kukwana, iyo goridhe leaching reaction inodzika, uye yakawanda sodium cyanide inogona kupedzwa mukuyedza kufambisa mhinduro kumberi.

Case Studies

Mune mumwe mugodhi wegoridhe, imba yechinyakare - tembiricha cyanide leaching process yakadyiwa 2.5 kg ye sodium cyanide patani ye ore. Pakaunzwa iyo yepamusoro-tembiricha leaching process, pakutanga, nekuda kwekukasira kwegoridhe - leaching reaction, nguva yekudonha yakaderedzwa kubva pamaawa makumi mana nemasere kusvika pamaawa makumi maviri nemana. Nekudaro, nekuda kwekutadza kutonga tembiricha, nekudziya kwekushisa kunosvika 48 ° C, iyo hydrolysis yesodium cyanide yakawedzera zvakanyanya. Nekuda kweizvozvo, kudyiwa kwesodium cyanide kwakakwira kusvika pa24 kg patani ye ore. Mushure mekugadzirisa iyo yakakwirira-tembiricha leaching process, kusanganisira kunyatso kudzora tembiricha panosvika 80 °C uye nekuwedzera inhibitors kuderedza cyanide hydrolysis, Kushandiswa kweSodium Cyanide yakadzikiswa kusvika pa2.0 kg patani yeore ichiri kuchengetedza goridhe rakakwirira reLeaching.

mhedziso

Yakakwira - tembiricha leaching ine mhedzisiro yakaoma pakushandiswa kwesodium cyanide mune yekubvisa goridhe maitiro. Kune rimwe divi, inogona kumhanyisa iyo goridhe - leaching reaction, inogona kudzikisa sodium cyanide kushandiswa kana maitiro acho akanyatsogadziriswa. Kune rimwe divi, tembiricha yakakwira inogona kukonzera yakawedzera cyanide hydrolysis, zvakanyanya kuita nemaminerari anosanganisirwa, uye kuderedzwa kweokisijeni solubility, izvo zvese zvinogona kutungamirira kune yakakwira sodium cyanide kushandiswa. Naizvozvo, kana uchiisa yakakwira-tembiricha leaching, zvakakosha kukwirisa maitiro ma paramita, senge chaiwo tembiricha yekudzora, yakakodzera okisijeni, uye kushandiswa kwezvinowedzerwa kuvharidzira cyanide hydrolysis uye zvisingadiwe maitiro ane mamineral akabatana. Iyi nzira inogona kubatsira kuenzanisa pakati pekuvandudza goridhe leaching kunyatsoshanda uye kuderedza sodium cyanide kushandiswa, kuwedzera hupfumi uye kwezvakatipoteredza kuita kwegoridhe migodhi.