Tsvagiridzo yeArsenic Inhibition uye Sulfur-Iron Enrichment muCyanidation Tailings

ziviso

Kubviswa kwetsvina yecyanidation kunokonzerwa nekubvisa tsvina muindasitiri yesimbi kunokonzera matambudziko makuru ezvakatipoteredza nekuda kwehuwandu hwayo hwakawanda hwearsenic. Kuwedzera kune zvinonetsa nezvezvakatipoteredza, kubviswa kwetsvina iyi kunomiririra imwe nzira inogona kushandiswa. Saka, zvakakosha kugadzira nzira dzinoshanda dzekuwedzera zvinhu zvakakosha senge sarufa nesimbi panguva imwe chete uku uchideredza huwandu hwearsenic. Chidzidzo ichi chinotarisa kusvibiswa kwecyanidation kubva muchina wekunyungudutsa, nechinangwa chekuzadzisa zvinangwa izvi kuburikidza nekuita kuti zvinhu zvifambe zvakanaka.

Methodology

Muenzaniso Sosi

Iyo cyanidation tailings yakashandiswa muchidzidzo ichi yakatorwa kubva kune chaiyo smelter. Iwo masampuli ekutanga aizivikanwa kuti anzwisise kuumbwa kwavo kwekutanga uye mineralogical zvivakwa vasati vaenderera mberi nekuyedza flotation.

Flotation Kuedza

Sulfuric acid (H_2SO_4) yaishandiswa se sulfur activator. Musanganiswa we sodium humate uye calcium hypochlorite (Ca (ClO) _2) yakashandiswa se arsenic inhibitor. Multiple flotation miedzo yakaitwa pasi pemamiriro akanyatsodzorwa. Iwo ekuyedza ma paramita, anosanganisira reagent dosage, pulp density, uye nguva yeflotation, akagadziridzwa kuti awane yakanakisa kupatsanurwa mhedzisiro.

Analytical Techniques

Kuongorora Electron Microscopy (SEM) uye X-ray Diffraction (XRD) yakashandiswa kuongorora zvigadzirwa zvekuyangarara. SEM yakashandiswa kutarisa pamusoro morphology uye particle maitiro emasampuli. Ongororo yeXRD yakabatsira kuona iyo mineralogical phases iripo mumasamples, ichipa manzwisisiro eiyo arsenic yekuitika mamiriro mukati meiyo cyanidation tailings.

Results

Kuedza kweflotation kwakaratidza mhedzisiro inoshamisa. Sarufa giredhi muconcentrate yakasvika pamusoro pe48%, nepo arsenic giredhi yakabudirira kudzikiswa kusvika pasi pe0.2%. Mhedzisiro iyi inoratidza kushanda kweakasarudzwa reagents uye yakagadziridzwa flotation process mukuzadzisa zvinangwa zviviri zvesarufa-iron enrichment uye arsenic kubvisa.

hurukuro

Chiitiko State of Arsenic

Kuburikidza neSEM uye XRD ongororo, kuitika mamiriro earsenic mune cyanidation tailings yakatemwa. Arsenic yakawanikwa yakabatana nemamwe maminerari, ayo akakanganisa maitiro ayo panguva yekuyerera. Kunzwisisa chiitiko ichi kwakakosha pakugadzira nzira dzakanangana dzekuparadzanisa.

Zvikonzero zvekuparadzana kwakaoma kweSulfur neArsenic

Chidzidzo chacho chakaitawo kuongorora kwekutanga kwezvikonzero zvakakonzera kuparadzaniswa kwakaoma kwesarufa uye arsenic mu cyanidation tailings. Zvinhu zvakadai sekuparadzirwa kwakanaka kwearsenic-bearing minerals, kupindirana kwepamusoro pakati pemaminerari akasiyana, uye kuoma kwemakemikari kuumbwa kwemiswe kwakakonzera kuoma uku. Kushandiswa kwe (H_2SO_4), sodium humate, uye (Ca (ClO) _2) musanganiswa kwakaderedza matambudziko aya kusvika pamwero wakati, sezvinoratidzwa nemhedzisiro yakanaka yekutenderera.

mhedziso

Ichi chidzidzo chakabudirira kugadzira nzira yekuyangarara yekupfumisa sarufa-iron uye kubvisa arsenic kubva kune cyanidation tailings. Kushandiswa kwe (H_2SO_4) se sulfur activator uye kusanganiswa kwe sodium humate uye (Ca (ClO) _2) se arsenic inhibitor yakaratidza kushanda. Kuongorora kweSEM neXRD kwakapa ruzivo rwakakosha muchiitiko che arsenic uye zvikonzero zvekuparadzaniswa kwakaoma kwesarufa-arsenic. Tsvagiridzo yeramangwana inogona kutarisisa pakuwedzera kukwenenzvera nzira yekuyangarara, kuongorora mamwe mareagents, nekuvandudza kugona kwese kwekugadzirisa zviwanikwa uye kuchengetedza kwezvakatipoteredza.