Kushanda kweCyanidation uye Carbon-in-Pulp (CIP) Maitiro ekuchera Goridhe

Kuisa goridhe mu cyanidation kwave kuchishandiswa zvakanyanya mumigodhi yegoridhe nekuda kwekushanduka kwayo zvakanyanya kune matombo akasiyana-siyana, kugona kwayo kugadzira goridhe panzvimbo yacho, uye mwero wepamusoro wekudzoreredza. Zvisinei, nekuda kwezvinetso zvekuongorora zvakatipoteredza, migodhi inogona kurapa tsvina isati yapinda mudura kana kuti mushure mekunge yapinda mudura kuti isaburitse zvachose, kana kushandisa zvinhu zvinobvisa cyanide shoma kana cyanide kudzivirira nharaunda yenharaunda. Chinyorwa chino chinosuma mashandiro ecyanidation uye maitiro eCarbon -in-pulp ekubvisa goridhe. Chinangwa hachisi chekunzwisisa chete nzira dzekubvisa goridhe asiwo kubvisa kusvibiswa uye kufambira mberi pakugadzira migodhi isina njodzi kune zvakatipoteredza.

Cyanidation yeGoridhe Kuchera

Zvinhu zvekushandisa zvinosanganisira kuwanda kwecyanide uye okisijeni, tembiricha, saizi uye chimiro chezvikamu zvegoridhe muore, kusungirirwa kwe pulp, zviri mukati me slime, firimu repamusoro rezvimedu zvegoridhe, uye nguva yekudonha.

Kana huwandu hwecyanide huri pasi, kunyungudika kweokisijeni kwakakwira, uye huwandu hwegoridhe hunobva paCyanide Concentration . Kana huwandu hwecyanide huri pamusoro, huwandu hwegoridhe hunonyungudika hunobva pahuwandu hweokisijeni. Kazhinji, huwandu hwecyanide hunobva pa0.03% kusvika pa0.05%. Kuwedzera mamwe maokisijeni, leaching inobatsira, kana kuisa okisijeni zvakananga kunovandudza zvakanyanya leaching effect.

Semuyenzaniso, chirimwa checarbon-in-pulp chakatsiva mweya neokisijeni - gasi rakapfuma (neokisijeni inodarika 90%) ndokuibaya mutangi reLeaching. Nekuda kweizvozvo, chiyero cheleaching chakawedzera ne0.89 muzana. A concentrator akawedzera 98% lead acetate pamwero we0.1 kg patani ye ore kune yekutanga leaching tank. Nekuda kweizvozvo, giredhi regoridhe remaswe rakadzikira kubva pa0.218 g/t kusvika 0.209 g/t.

Mwero wekunyungudika kwegoridhe mumushonga wecyanide unowedzera nekukwira kwekushisa. Kazhinji, tembiricha inochengetwa iri pakati pe10°C ne20°C. Pasi pe 1.34 ° C, mhinduro inopenya. Naizvozvo, munguva yechando, maodzanyemba ekumusoro anowanzo shandisa blowtorch kubika mapaipi akavharwa. Pamusoro pe 34.7 ° C, mushonga unoshanduka kuva mamiriro emvura, uye gasi rinowanzobuda. Kudzikamisa uye kuderedza kurasikirwa kwekemikari, huwandu hwakakodzera hwealkali, inozivikanwa seyekudzivirira alkali, inowanzowedzerwa kukurudzira maitiro munzira yekuderera kwehydrolysis.

Goridhe rakatsetseka rine nzvimbo yakakura yakavhurika mushure mekukuya uye inonyungudika zviri nyore necyanidation. Pamusoro pezvo, zvimedu zvegoridhe zviri muchimiro chemaflakes, madiki mativi, uye ane maburi emukati ari nyore kunyungudika. Kana iyo pulp concentration yakadzikira, viscosity idiki, uye mwero wekupararira kweiyo cyanide ion uye oxygen mumushonga wepamusoro pezvikamu zvegoridhe zvakakwirira. Nekuda kweizvozvo, goridhe rinonyungudika nekukurumidza, uye chiyero cheleaching chakakwira. Nekudaro, iyo yakaderera yekumisikidza inowedzera vhoriyamu yepulp, zvichitungamira kune yakakura midziyo zvinodiwa uye yakakwirira reagent kushandiswa. Iyo yakakodzera pulp concentration ndeye 40% - 50%. Kana iyo ore iine huwandu hukuru hwemarara uye ine yakaoma zvimiro, iyo yekumisikidza inofanirwa kudzorwa pa20% - 30%.

Kusachena kunoumba mafirimu akasiyana-siyana pamusoro pezvikamu zvegoridhe, zvichikanganisa kubuda kwegoridhe. Maminerari akabatanidzwa anopindirana neokisijeni, cyanide, uye alkali, zvichitadzisa kubuda kwegoridhe. Sezvo nguva yeleaching inowedzera, iyo leaching rate inokwira kune imwe muganhu, asi ipapo mwero unodzikira. Izvi zvinodaro nekuti vhoriyamu uye saizi yegoridhe inodzikira, chinhambwe chiri pakati pecyanide, oksijeni yakanyungudika, uye goridhe macomplexes chinowedzera, uye kuunganidzwa kwetsvina kunoumba firimu rinokuvadza pakudonha. Iyo "jamming" yeagitator mutangi reLeaching, inokonzerwa nekukwirira kwakadzika, kuderera kwakadzika, kuderera kwemhepo, uye kuchena kwechimiro pakati peidzi yepasi nepasi petangi, zvakare inokanganisa kudonha kwegoridhe. Mushure mekunge matangi emusangano wecyanidation azara, vashandi vakatenderedza muchina nemaoko vakashandisa pfuti dzemvura dzakakwirira, pfuti dzemhepo, uye masimbi marefu kusunungura pombi. Pakupedzisira, zvakazoonekwa kuti kubvisirwa pakati peiperesi yepasi nepasi petangi kwakapetwa kana kupfuura ukoshi hwenguva dzose. Dambudziko rakagadziriswa mushure mekugadzirisa.

Carbon-in-Pulp (CIP) Maitiro ekuchera Goridhe

Zvinhu zvinoshanda zvinosanganisira kunyudzwa kweActivated Carbon , kubviswa kwesimba remagetsi (desorption) uye kubviswa kwesimba remagetsi (electrolysis), uye kudzorerwa kwesimba remagetsi (regeneration) mumhepo (carbon regeneration).

Usati washandisa kabhoni nyowani, zvinodikanwa "kutenderedza mipendero uye kubvisa marara" kuburikidza nepre-kugaya. Paunenge uchitenga kabhoni, zvese adsorption kugona uye simba zvinofanirwa kuve nechokwadi. Density yekutakura inofanira kuva 0.50 kg/L - 0.55 kg/L, uye saizi yechikamu inofanira kuva yenguva dzose uye yakafanana, kazhinji 6 - 12 mesh kana 6 - 16 mesh. Iyo madota emukati uye zviri mukati me undersize zvimedu hazvifanirwe kudarika 3%. Muchirimwa checarbon-in-pulp, yakakwira yehupfu kabhoni yakaita kuti giredhi regoridhe remvura yemuswe rive rakapetwa kagumi nenhanhatu pane zvakajairika, zvichikonzera kurasikirwa kwegoridhe. Somugumisiro, carbon yaifanira kuchinjwa zvachose.

Kuwanda kwekabhoni mumatangi adsorption kunowedzera mune gradient. Tichifunga nezvekuchembera kwekabhoni, kudhirowa kazhinji kunobatsira kudzoreredza goridhe. Kabhoni-in-pulp chirimwa chakashandura kutenderera kwekabhoni kubva pamazuva matatu kuenda kune rimwe zuva rimwe nerimwe, uye kugadzirwa kwakawedzera nekota. Kana tangi rikapfachukira uye kabhoni yapera, goridhe rinotozorasika. Izvi zvinonyanya kukonzerwa nekuvharika kwekabhoni - retaining screen. Debris inofanira kubviswa kare mushure me classifier uye hydrocyclone. A horizontal cylindrical screen inoshandiswa se carbon - retaining screen. Dambudziko rinogonawo kugadziriswa nekudzikisira kudzika kwe pulp kana kuwanda kwekabhoni yepasi uye kuwedzera huwandu hwemhepo hwemhepo duct padivi pechidzitiro.

Kudonha kwekabhoni kubva kune yekupedzisira adsorption tank hakudiwe zvakanyanya. Iyo 40 - mesh yekuchengetedza skrini pane tailings yekusanganisa tank inoshanda seyakakosha yekutarisa. Inofanirwa kuongororwa uye kuchengetedzwa nguva nenguva kuti ive nechokwadi chekutendeseka kwayo. Kuti uderedze kupfeka kabhoni, kuderera - kumhanyisa kumhanyisa kunowanzoshandiswa.

Kubviswa kwemvura ne electrolysis zvinoitwa mu 1% sodium hydroxide neSodium cyanide pasi pekumanikidzwa kwe 0.35 MPa - 0.39 MPa, zvichiita kuti 135°C - 160°C isvike pakufashaira kwemvura. Kabhoni isina kufashaira iri pasi pe 50 g/t. Parizvino, electrolysis isina cyanide inoshandiswa zvakanyanya.

Kuti carbon regeneration, inowanzonyudzwa mu 3% - 5% dilute nitric acid kana hydrochloric acid ye 0.5 - 1 awa. Vashandi vanofanira kuimutsa nguva nenguva. Mushure mekuibvisa mutangi, inonyudzwa mumvura kubvisa iyo acid leaching solution. Zvadaro, inonyudzwa mu1% sodium hydroxide kuti isaite asidhi yasara. Pakupedzisira, inoshambidzwa ne 2 - 3 nguva yehuwandu hwebhedha yekabhoni.