Sodium cyanide, ib qho tshuaj tsim nyog rau leaching ntawm kub mines

Hauv ntiaj teb no Kub Tsuas, cov extraction ntawm kub los ntawm ore yog ib tug complex thiab fascinating txheej txheem. Ib qho tshuaj uas ua lub luag haujlwm tseem ceeb hauv cov txheej txheem no yog Sodium Cyanide. Rau ntau tshaj ib puas xyoo, sodium cyanide tau yog ib qho tseem ceeb ntawm kev rho tawm cov kub los ntawm ore, thiab rau hnub no, nws tseem yog txoj kev rho tawm zoo tshaj plaws hauv kev ua haujlwm kub feem ntau.

Lub hauv paus ntawm Sodium Cyanide

sodium cyanide (NaCN) yog ib tug compound uas muaj cov cyano pawg, uas muaj ib tug triple - bonded carbon thiab nitrogen. Nws tuaj yeem muaj nyob rau hauv ob qho tib si khoom thiab cov ntaub ntawv ua kua. Khoom Sodium cyanide feem ntau yog tsim los ua cov dawb crystalline briquette, tseem hu ua "cyanoid." Cov briquettes no soluble heev, ua rau lawv yooj yim rau siv nyob rau hauv cov txheej txheem tsuas. Liquid sodium cyanide, ntawm qhov tod tes, yog xa mus rau kuv qhov chaw ntawm lub hom phiaj - tsim ISO tso tsheb hlau luam tsim nyog rau kev thauj mus los lossis kev tsheb ciav hlau.

Yuav Siv Sodium Cyanide li cas hauv Kub Mining

Cov txheej txheem ntawm kev siv sodium cyanide los rho cov kub los ntawm ore yog hu ua Cyanide Leaching los yog cyanidation. Ntawm no yog ib kauj ruam - los ntawm - txheej txheem cej luam ntawm cov txheej txheem no ua haujlwm li cas:

1. Ore Kev Npaj: Ua ntej, cov kub - bearing ore yog crushed rau hauv ib tug zoo hmoov siv industrial machinery. Qhov no ua rau thaj tsam saum npoo ntawm cov ore, tso cai rau kev sib cuag zoo nrog cov tshuaj sodium cyanide.

2. Ua Lees: Tom qab ntawd cov crushed ore yog ntxiv rau kev ua tib zoo saib xyuas cov tshuaj sodium cyanide. Thaum lub sij hawm tus txheej txheem no, cov kub molecules tsim muaj zog heev bonds nrog sodium cyanide, ua dej - soluble. Cov tshuaj tiv thaiv tuaj yeem sawv cev los ntawm qhov sib npaug: 4 Au + 8 NaCN + O₂ + 2 H₂O = 4 Na(Au(CN)₂) + 4 NaOH. Nyob rau hauv cov tshuaj tiv thaiv no, kub reacts nrog sodium cyanide, oxygen, thiab dej los ua ib tug soluble kub - cyanide complex, sodium aurocyanide (Na(Au(CN)₂)).

3. Sib cais: Tom qab cov kub tau yaj mus rau hauv cov tshuaj, cov kauj ruam tom ntej yog cais nws ntawm cov ore seem thiab lwm yam impurities. Ib txoj hauv kev yog siv zinc los ua kom cov kub tawm ntawm cov tshuaj. Zinc reacts nrog kub - cyanide complex, hloov cov kub thiab tsim zinc - cyanide complex, yog li tig cov kub rov qab mus rau hauv ib daim ntawv. Lwm txoj kev yog siv cov pa roj carbon activated adsorb kub - cyanide complex los ntawm cov tshuaj. Cov kub-laden carbon yog tom qab ntawd ua tiav ntxiv kom rov qab tau cov kub.

Qhov zoo ntawm Kev Siv Sodium Cyanide hauv Kub Mining

1. Nqi - Ua tau zoo: Sodium cyanide kuj pheej yig dua piv rau lwm txoj hauv kev Kub Extraction. Qhov no ua rau nws yog ib qho kev xaiv zoo rau cov tuam txhab mining, tshwj xeeb tshaj yog thaum cuam tshuam nrog kev ua haujlwm loj lossis qis-qib ores.

2. High Performance: Cyanide leaching tuaj yeem ua tiav cov txiaj ntsig kub rho tawm, feem ntau tshaj 90% hauv ntau qhov xwm txheej. Qhov no txhais tau hais tias ntau kub tuaj yeem rov qab los ntawm cov ore, ua kom cov txiaj ntsig ntawm kev lag luam mining.

3. solubility: Sodium cyanide muaj zoo solubility nyob rau hauv dej, tso cai rau nws mus sai sai kis tau thiab reacts nrog kub nyob rau hauv lub ore, uas yuav pab kom ceev cov txheej txheem extraction.

Kev nyab xeeb thiab kev xav txog ib puag ncig

Nws yog ib qho tseem ceeb kom nco ntsoov tias sodium cyanide yog ib qho tshuaj lom neeg heev. Txawm li cas los xij, kev lag luam mining muaj cov txheej txheem kev nyab xeeb nruj nyob rau hauv qhov chaw kom ntseeg tau tias muaj kev nyab xeeb ntawm sodium cyanide. Qhov tseeb, hauv North America thiab Australia, tsis tau muaj cyanide - ntsig txog kev tuag ntawm kuv cov neeg ua haujlwm hauv ntau dua 100 xyoo. Thaum tuav sodium cyanide, cov neeg ua haujlwm yuav tsum hnav cov iav tiv thaiv tsim nyog, xws li lub qhov ncauj qhov ntswg los tiv thaiv cov plua plav hauv huab cua lossis cov pa roj carbon monoxide uas muaj cov tshuaj cyanide.

Los ntawm ib puag ncig kev xav, qhov kev txhawj xeeb tseem ceeb yog lub peev xwm rau cyanide kom nkag mus rau hauv dej. Ntses muaj ntau rhiab heev rau cyanide ntau dua li tib neeg, thiab kev siv tsis raug ntawm cyanide tuaj yeem ua rau muaj kev puas tsuaj rau cov ecosystems. Txhawm rau txo qhov kev pheej hmoo no, cov tuam txhab mining siv ntau txoj hauv kev los tswj thiab kho cyanide - muaj cov kev daws teeb meem. Piv txwv li, lawv tuaj yeem siv rau ntawm qhov chaw kho mob cov nroj tsuag kom detoxify cyanide ua ntej tso dej tawm. Tsis tas li ntawd, ntau lub mines muaj cov kab ke hauv qhov chaw los tiv thaiv kev tso tawm ntawm cyanide - muaj cov kev daws teeb meem.

xaus

Sodium cyanide tau, thiab txuas ntxiv mus, yog cov tshuaj tseem ceeb hauv kev lag luam kub mining. Nws muaj peev xwm ua tau zoo rho tawm kub los ntawm ore ntawm tus nqi qis tau ua rau nws yog ib feem tseem ceeb ntawm kev ua haujlwm kub niaj hnub no. Txawm hais tias kev txhawj xeeb txog kev nyab xeeb thiab ib puag ncig cuam tshuam nrog nws txoj kev siv, kev lag luam mining tau ua tiav tseem ceeb hauv kev tsim cov txheej txheem kev nyab xeeb thiab cov tswv yim kev tswj hwm ib puag ncig zoo. Raws li kev siv thev naus laus zis txuas ntxiv mus, nws yuav nthuav kom pom yog tias cov txheej txheem tshiab ntawm kev rho tawm kub tau tshwm sim, tab sis tam sim no, sodium cyanide tseem yog tus neeg tseem ceeb hauv kev tshawb nrhiav kom qhib tus nqi ntawm kub los ntawm ore.