Yuav tsum muaj sodium cyanide ntau npaum li cas kom yaj ib gram ntawm kub?

Nyob rau hauv lub tshav pob ntawm kub extraction thiab ua, kev siv ntawm Sodium Cyanide kom yaj kub yog ib txoj kev paub zoo. Sodium cyanide, uas (CN)₂ feem ntau hu ua pseudohalogen vim nws cov khoom zoo sib xws rau halogens, nrog rau cov khoom xws li (SCN)₂, tau qhia nyob rau hauv ib feem ntawm "Inorganic Chemistry" chav kawm hauv tsev kawm qib siab. Tus qauv thiab hais txog cov khoom, NaCN tuaj yeem ua piv txwv rau NaCl, thiab nws yog nyob rau hauv qeb ntawm inorganic compounds.

Cov txheej txheem dav dav ntawm Dissolving kub nrog Sodium Cyanide

Cov txheej txheem ntawm kev siv sodium cyanide Txhawm rau yaj cov kub feem ntau yog tswj hwm pH ntau ntawm 11 - 12. Ntxiv ib qho me me ntawm hydrogen peroxide kuj yog ib feem ntawm cov txheej txheem. Cov kub - uas muaj cov khoom yuav tsum tau tsau rau ob peb hnub. Tom qab ntawd, zinc hlau yog siv los txo qis. Nws yuav tsum tau muab sau tseg tias cov tshuaj siv yog tshuaj lom heev thiab yuav tsum tau kho nrog sodium hypochlorite rau oxidation kom nws tsis muaj teeb meem.

Muaj ob txoj hauv kev tseem ceeb rau cyanide leaching ntawm kub: Percolation Cyanide Leaching thiab Agitation Cyanide Leaching.

Percolation Cyanide Leaching

Percolation cyanide leaching muaj xws li tank leaching thiab heap leaching. Tank leaching nyob rau hauv percolation feem ntau yog siv los kho kub - bearing sands thiab kuj coarse - grained calcines nrog ib tug particle loj ntawm - 3 + 0mm. Thaum ua heap leaching rau qis - qib kub - bearing ores, nyob ntawm seb qhov luaj li cas ntawm ib txwm kub dissemination thiab lub porosity ntawm cov ore, cov ore feem ntau crushed mus rau tsawg tshaj li 50mm (los yog 10mm) ua ntej. Qhov me me ntawm qhov loj me ntawm cov ore blocks, qhov siab dua qhov kub leaching tus nqi. Thaum lub sij hawm percolation cyanide leaching, lub concentration ntawm Sodium cyanide feem ntau yog 0.03% - 0.2%. Cov ntsuas ntawm percolation cyanide leaching nyob ntawm seb qhov loj me ntawm cov kub, cov ntsiab lus ntawm sulfides, qhov loj me ntawm cov ore blocks, tus nqi percolation, lub sij hawm leaching, concentration ntawm cyanide agents, thiab qib ntawm kev ntxuav ntawm cov leaching residue. Thaum kho kub - bearing quartz xuab zeb, kub leaching tus nqi tuaj yeem ncav cuag 85% - 90%; Thaum lub particle loj yog ntxhib, qhov kub leaching tus nqi poob mus rau 60%. Thaum lub sij hawm percolation cyanide heap leaching, cov ntsiab lus kub nyob rau hauv lub cev xeeb tub cov tshuaj yog tsawg, thiab feem ntau, activated carbon adsorption yuav tsum tau enrichment. Kub yog muab rho tawm los ntawm cev xeeb tub cov tshuaj tau los ntawm desorption ntawm kub - loaded carbon los ntawm electrowinning los yog zinc hloov.

Agitation Cyanide Leaching

Agitation cyanide leaching feem ntau yog siv los ua cov kub kub - cov khoom siv pob zeb hauv av nrog cov particle loj ntawm tsawg dua 0.3 hli. Cov txheej txheem leaching yuav siv qhov chaw nyob rau hauv lub compressed - cua agitation tank, mechanical agitation tank, los yog ib tug ua ke agitation tank. Cov txheej txheem leaching suav nrog kev ua haujlwm xws li cov khoom sib cais - kua dej sib cais ntawm cov ntaub so ntswg, txee - tam sim no ntxuav, zinc hmoov hloov cov tshuaj cev xeeb tub, thiab smelting kub av nkos. Qhov concentration ntawm leached pulp feem ntau tsawg dua 30% - 33%. Thaum cov ntsiab lus ntawm slime siab, qhov concentration ntawm leached pulp yuav tsum tsawg dua 22% - 25%. Thaum lub sijhawm ua haujlwm, cov txiv qaub tau ntxiv los kho cov pH ntawm cov ntaub so ntswg mus rau 9 - 12. Cua yog them los tswj qhov kev pom zoo ntawm cov pa oxygen concentration thiab sodium cyanide concentration hauv cov pulp. Qhov concentration ntawm sodium cyanide nyob rau hauv lub pulp feem ntau yog 0.02% - 0.1%. Feem ntau cov concentrators siv cov txheej txheem agitation cyanidation txais yuav txoj kev ntxuav kom cais cov cev xeeb tub thiab cov leaching residue. Cov txheej txheem ntxuav tuaj yeem muab faib ua decantation, filtration, thiab fluidized - txaj txaj. Txoj kev siv feem ntau yog cov txee txuas ntxiv - tam sim no decantation method (CCD method). Cov thickeners siv rau hauv txoj kev no tuaj yeem muab faib ua ib leeg - txheej thiab ntau txheej txheej. Ntau cov cyanide concentrators nyob rau hauv Suav teb siv 2 - 3 - txheej thickeners rau khoom - kua sib cais thiab nruam txee - tam sim no ntxuav. Cov tshuaj uas cev xeeb tub tau pom meej meej, lim, thiab deoxygenated ua ntej xa mus rau zinc hmoov hloov. Cov av nkos tau kub yog smelted kom tau dore (kub - silver alloy).

Lub luag haujlwm ntawm Alkaline Pretreatment

Ntxiv sodium hydroxide rau alkaline pretreatment tuaj yeem ua rau tsis muaj zog lossis tshem tawm cov kev cuam tshuam ntawm cov teeb meem hauv cov ore, txhim kho qhov chaw leaching, thiab ua tiav cov txiaj ntsig zoo dua. Minerals xws li pyrite, sphalerite, thiab chalcopyrite tam sim no hauv cov qauv ore tuaj yeem tsim teeb meem ions xws li Fe²⁺, Fe³⁺, S²⁻, thiab Cu²⁺. Yog tias tsis muaj alkali - ntxiv pretreatment yog ua tiav, cov teeb meem ions no yuav haus ntau ntawm cyanide thiab yaj oxygen thaum lub sij hawm cyanide leaching, cuam tshuam qhov kev tawg ntawm kub thiab ua rau txo qis ntawm kub leaching tus nqi. Thaum lub sij hawm alkali - ntxiv pretreatment, Cu²⁺ thiab Zn²⁺ daim ntawv insoluble hydroxide precipitates, thiab S²⁻ yog oxidized los ua SO₃ thiab SO₄²⁻, txo kev noj ntawm cyanide. Fe (OH) ₃ tsim cov yeeb yaj kiab tiv thaiv saum npoo ntawm cov pob zeb hauv av xws li pyrite, tiv thaiv nws cov oxidation sai thiab tawg ntxiv, yog li txo qhov kev noj ntawm CN⁻.

Tus nqi ntawm Sodium Cyanide yuav tsum tau ua kom tawg kub

Cov ntaub ntawv pov thawj qhia tau hais tias kwv yees li 100 - 300 grams ntawm sodium cyanide yuav tsum tau yaj ib gram ntawm kub. Cov nyiaj no tuaj yeem sib txawv nyob ntawm ntau yam xws li hom ore, qhov zoo ntawm cov khoom kub, thiab cov txheej txheem leaching tshwj xeeb siv.

Hauv kev xaus, thaum siv sodium cyanide hauv Kub Dissolution yog ib txoj hauv kev zoo, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo saib xyuas kev nyab xeeb thiab kev tiv thaiv ib puag ncig vim muaj tshuaj lom ntawm sodium cyanide. Kev ntsuas kev nyab xeeb thiab kev kho kom zoo ntawm cov kev daws teeb meem pov tseg yog qhov tseem ceeb kom txo qis qhov cuam tshuam tsis zoo rau tib neeg kev noj qab haus huv thiab ib puag ncig.