Nasihu don Rage Sodium Cyanide a Tsire-tsire masu sarrafa Zinariya

A halin yanzu, yawancin masana'antar sarrafa gwal suna amfani da su Sodium cyanide kamar sinadarin hakar gwal. Hanyar cyanidation na zinari yana maraba da yawancin masu hakar gwal a duk faɗin duniya saboda tsarinsa mai sauƙi da ƙimar murmurewa.

1. Ƙarfafa Haɓaka Haɓaka Haɓaka da Inganta Ingantacciyar Isar da Iskar Oxygen

Ƙara yawan iska da haɓaka iskar oxygen na iya rage yawan amfani da ruwa mara amfani cyanide. A halin yanzu, yawancin tsire-tsire na cyanidation na zinari suna amfani da ƙananan matsa lamba (0.2mpa) na'urar damfara iska mara amfani don isar da iska, kuma adadin iskar iskar yana tsakanin tanki 0.5-1.0m3/min. Domin inganta ingancin iskar iskar, kuna saita ƙaramin rami a ƙarshen bututun iskar don samar da adadi mai yawa na ƙananan kumfa mai diamita, ko shigar da bawul ɗin duba don hana koma baya.

2. Tsananin Sarrafa Makin Copper na Danyen Tama

Copper yana cinye babban rabo na cyanide a cikin aikin leaching. Misali, shukar cyanidation na zinari yana da darajar tagulla na 0.548% a cikin ɗanyen tama, kuma mahaifiyar barasa ta farko tana ɗauke da jan karfe 1161mg/L, wanda ke cinye kashi 37.6% na cyanide da ake amfani da shi a duk shekara. Saboda babban abun ciki na tagulla na maganin narkewa, don kiyaye aikin leaching na gwal na maganin, sodium Cyanide maida hankali a cikin slurry dole ne a ƙara daidai, wanda kara ƙara yawan amfani da sodium cyanide. Sabili da haka, sarrafa abun ciki na jan karfe na danyen tama ba zai iya rage yawan sodium cyanide da ake cinyewa ta hanyar narkar da jan karfe ba, amma kuma yana rage yawan ƙwayar sodium cyanide a cikin maganin leaching.

Don rage darajar jan karfe, zaku iya pretreate shi ta hanyar iyo ko wasu hanyoyin, sannan ku zubar da zinari bayan an raba jan karfe.

3. Sarrafa Ratio na CN- da O2 Concentration a cikin Slurry

A lokacin aikin leken zinari, dole ne a ƙara iska da sodium cyanide don tabbatar da leaching na zinariya. Yawan yaduwar zinari a cikin maganin ya dogara ba kawai akan ƙaddamar da CN- da O2 a cikin maganin ba, har ma a kan ƙaddamar da CN- a kowace naúrar zinari, ƙaddamar da narkar da O2. sararin saman gwal na gwal da kauri na lantarki biyu Layer.

CN-/O2=4x(Narkar da iskar oxygen yaduwa coefficient/sodium cyanide diffusion coefficient)

=4×(2.76×10-5cm/s ÷1.83×10-5cm/s)=4×1.5=6

Ana kiran wannan rabon iyakar narkar da ƙimar ion da aka narkar da gwal.

Don nau'ikan ma'adinai daban-daban, ana iya daidaita ƙimarta a cikin kewayon 4.6 zuwa 7.4 don ƙayyade ƙimar fa'ida mafi kyau. Idan an ƙara yawan sodium cyanide ko iska yayin aikin leaching, ba zai ƙara yawan leaching na zinari ba kuma ya haifar da sharar gida. Sabili da haka, a cikin tsarin leaching na zinari, sau da yawa ya zama dole don bincika da sarrafa cyanide kyauta da abun ciki na oxygen a cikin maganin don kiyaye rabon su biyu a kusan 6.

4. Kafa Ma'auni na Sashi na Cyanide

Sodium cyanide shine babban wakili na cin abinci na aikin cyanidation na zinari. Saboda haka, ma'auni na adadin sodium cyanide ya kamata a yi nazari akai-akai. Abin da ake kira ma'auni na cyanide yana nufin ma'auni tsakanin cyanide da aka saki daga maganin leaching da kuma ainihin amfani da sodium cyanide, wanda ke da alaƙa da alamun fasaha na tsari, farashin tattalin arziki, kula da muhalli da sauran farashi.

Baya ga samuwar hadadiyoyi da mahadi daban-daban, asarar sodium cyanide kuma ya hada da tallan sludge na yumbu, adsorption na ma'adinan ma'adinai da kuma tserewa wani ɗan ƙaramin adadin hydrogen cyanide. Tsohon amfani ya kamata ya zama kusan 90%. Idan ya yi ƙasa da wannan darajar, ya kamata a dangana shi ga ingancin sodium cyanide, albarkatun albarkatun kasa, da ma'auni na ruwa, ko ma'auni a cikin aiki, ko "faduwa, zubarwa, kumfa da zubewa".

5. Sarrafa Mahimmancin Calcium Oxide (CaO).

A cikin aiwatar da hakar gwal mai oxidative, dole ne a ƙara lemun tsami. Kuma yana da matukar muhimmanci a kula da daidaitaccen ƙwayar calcium oxide. Babban ayyukansa sune:

CaO na iya ƙara ƙimar pH na maganin leach, yana rage ƙaddamar da HCN da aka samar kuma yana rage haɓakar gas na HCN.

Saboda ƙari na Ca2 + a cikin maganin, ƙwayar jan ƙarfe na jan ƙarfe ya ragu sosai, yana hana samuwar Fe (CNS) 4. kuma ƙaddamar da CNS-ions a cikin maganin ya ragu. Ca2 + yana hana haɗuwa da CN- tare da Cu da S, don haka rage yawan amfani da cyanide yadda ya kamata.

Bayan gwaje-gwaje akai-akai, masana sun yi imanin cewa yana da kyau a ƙara calcium oxide 12 g/kg.

a ƙarshe

Abubuwan da ke sama su ne hanyoyi 5 don rage adadin sodium cyanide a cikin tsire-tsire na cyanidation na zinariya. A cikin samarwa na ainihi, adadin abubuwa daban-daban za a iya daidaita su daidai daidai da ainihin halin da ake ciki don rage yawan amfani da sodium cyanide, adana farashi, da rage cutar da ruwa na cyanide ga muhalli.

Idan kuna da wasu tambayoyi game da abubuwan da ke sama, ko kuna son sanin , kuna iya tuntuɓar sabis na abokin ciniki na kan layi ko aika saƙo, za mu tuntuɓe ku da wuri-wuri!