Kev siv Cyanide hauv Kub Cyanidation txheej txheem

nws cov txheej txheem cyanidation yog lub hauv paus pob zeb hauv kev rho tawm cov kub los ntawm nws cov ore. Nkag siab txog kev noj ntawm sodium cyanide Thaum lub sij hawm cov txheej txheem no yog ib qho tseem ceeb rau optimizing kev ua hauj lwm efficiency thiab minimizing ib puag ncig. Kab lus no delves rau hauv ntau yam mechanisms pab rau kev noj ntawm Sodium Cyanide nyob rau hauv lub kub cyanidation txheej txheem.

1. Autodecomposition

sodium cyanide tau txais autodecomposition thaum lub sij hawm cyanidation txheej txheem. Qhov no ua rau kev tsim cov carbonic acid, formic acid, thiab ammonia. Cov tshuaj tiv thaiv autodecomposition tuaj yeem yog qhov nyuaj thiab cuam tshuam los ntawm cov xwm txheej xws li qhov kub thiab txias, qhov xav tau, thiab muaj qee yam catalysts.

2. Hydrolysis

Hydrolysis ntawm Sodium cyanide yog lwm txoj hauv kev tseem ceeb ntawm kev noj. Cov tshuaj tiv thaiv ntawm dej thiab sodium cyanide yog raws li nram no:

(H2O + NaCN HCN + NaOH)

Hydrogen cyanide (HCN), uas yog ib qho muaj zog heev thiab muaj kuab lom, yog tsim thaum lub sij hawm hydrolysis. Tus nqi ntawm HCN generated yog ze ze rau cov alkalinity ntawm cov tshuaj. Thaum tus nqi pH khaws cia ntawm 12 lossis siab dua, cov tshuaj cyanide tseem nyob ruaj khov. Txawm li cas los xij, cov khoom uas tuaj yeem txo tus nqi pH, xws li carbon dioxide los ntawm huab cua, acids hauv cov dej pleev, divalent magnesium ions (Txg2+) thiab trivalent aluminium ions (A13 +), thiab ntau yam minerals nyob rau hauv ore los yog oxidation khoom ntawm sulfide minerals, tuaj yeem ceev cov tshuaj tiv thaiv hydrolysis.

3. Kev tsim ntawm Thiocyanate

Sodium cyanide reacts nrog sulfide minerals xws li hlau, tooj liab, thiab arsenic los tsim thiocyanate complexes. Cov tshuaj tiv thaiv no hloov cov cyanide ions mus rau hauv cov tsiaj tsis tshua muaj zog, txo cov nyiaj dawb cyanide muaj rau kub rho tawm. Kev tsim ntawm cov thiocyanate complexes tsis tsuas yog nce cyanide noj tab sis kuj cuam tshuam rau tag nrho cov txiaj ntsig ntawm cov txheej txheem kub cyanidation.

Nkag siab txog cov txheej txheem kev noj haus no muab kev pom zoo rau cov neeg ua haujlwm hauv kev lag luam kub mining. Los ntawm kev ua tib zoo saib xyuas thiab tswj cov xwm txheej ntawm cov txheej txheem cyanidation, nws muaj peev xwm txo qis kev siv cyanide, txhim kho cov nyiaj rov qab los, thiab txo qis ib puag ncig hneev taw ntawm kev ua haujlwm kub mining.