Qhov cuam tshuam ntawm Stirring Rate ntawm Leaching Rate ntawm Sodium Cyanide

1. Introduction

Cyanide leaching yog ib txoj hauv kev siv dav hauv kev lag luam mining rau rho tawm cov hlau muaj txiaj ntsig, tshwj xeeb tshaj yog kub, los ntawm ores. Sodium cyanide plays lub luag haujlwm tseem ceeb hauv cov txheej txheem no vim nws cuam tshuam nrog cov hlau los tsim cov txheej txheem soluble, tso cai rau lawv sib cais los ntawm cov ore matrix. Ntawm cov ntau yam uas yuav cuam tshuam cov efficiency ntawm Cyanide leaching, tus nqi stirring yog qhov tseem ceeb. Cov kab lus no tsom mus tshawb nrhiav kom meej tias qhov kev sib tw ua rau cuam tshuam li cas Leaching tus nqi of Sodium cyanide.

2. Lub luag haujlwm ntawm Stirring hauv Cyanide Leaching

2.1 Txhim khu kev hloov loj

Hauv cov txheej txheem cyanide leaching, cov tshuaj tiv thaiv ntawm Sodium Cyanide thiab cov hlau hauv cov ore tshwm sim ntawm qhov sib cuam tshuam ntawm cov khoom ore hais thiab cov kua cyanide kua. stirring pab txhim kho qhov loj hloov ntawm reactants (sodium cyanide thiab oxygen) rau saum npoo ntawm cov ore hais thiab tshem tawm cov tshuaj tiv thaiv los ntawm qhov chaw. Thaum lub stirring tus nqi yog nce, cov kua ntws nyob ib ncig ntawm cov hais ua turbulent. Qhov turbulence no txo ​​cov thickness ntawm ciam teb ib ncig ntawm cov hais, uas yog lub cheeb tsam uas cov concentration gradient ntawm reactants thiab cov khoom muaj nyob. Raws li qhov tshwm sim, qhov diffusion tus nqi ntawm sodium cyanide thiab oxygen mus rau qhov chaw particle nce, txhawb cov tshuaj tiv thaiv leaching.

2.2 Tiv thaiv Particle Sedimentation

Lwm qhov tseem ceeb ntawm kev nplawm yog los tiv thaiv cov sedimentation ntawm nplua ore hais, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm ores nrog ib tug siab cov ntsiab lus ntawm slime, av nplaum, los yog shale. Cov khoom zoo no tuaj yeem daws tau thaum lub sijhawm leaching, txo qhov chaw sib cuag ntawm cov ore thiab cov tshuaj cyanide thiab yog li txo cov leaching efficiency. Los ntawm tsis tu ncua stirring lub pulp (ib tug sib tov ntawm ore thiab tov), ​​cov hais yog khaws cia nyob rau hauv ncua kev kawm ntawv, xyuas kom meej sib cuag nrog cov tshuaj cyanide thoob plaws hauv lub leaching txheej txheem.

3. Kev Tshawb Fawb Kev Tshawb Fawb Txog Kev Tshaj Tawm ntawm Tus Nqi Tshaj Tawm

3.1 Laboratory - Scale Experiments

Ntau qhov chaw kuaj - ntsuas ntsuas tau ua los tshawb xyuas kev sib raug zoo ntawm tus nqi nplawm thiab qhov leaching tus nqi ntawm sodium cyanide. Hauv ib qho kev sim, ib qho piv txwv ntawm cov ore yog hauv av rau qhov loj me me thiab tom qab ntawd tov nrog cov tshuaj cyanide hauv lub reactor nruab nrog lub stirrer. Tus nqi nplawm yog sib txawv, thiab tus nqi leaching yog ntsuas nyob rau hauv ib lub sij hawm. Piv txwv li, nyob rau hauv ib qho kev sim ntawm ib tug kub - bearing ore, thaum lub stirring tus nqi tau nce los ntawm 200 rpm mus rau 600 rpm, lub leaching tus nqi ntawm kub (uas yog leached los ntawm sodium cyanide) nce heev nyob rau hauv thawj theem ntawm leaching. Txawm li cas los xij, dhau ntawm ib qho kev nplawm (nyob ib ncig ntawm 800 rpm nyob rau hauv rooj plaub no), qhov nce ntawm cov leaching tus nqi tau ua tsawg dua.

3.2 Muaj - Scale Observations

Kev lag luam - nplai kev ua haujlwm kuj tseem muab cov kev nkag siab zoo rau qhov cuam tshuam ntawm kev sib tw. Nyob rau hauv loj-scale cyanide leaching nroj tsuag, stirring tus nqi ntawm cov leaching tso tsheb hlau luam yog ua tib zoo tswj. Nws tau raug pom tias thaum tus nqi nplawm qis dhau lawm, muaj cov cheeb tsam hauv lub tank uas cov ore hais tsis zoo - tov nrog cov tshuaj cyanide, ua rau txo qis tag nrho cov leaching tus nqi. Ntawm qhov tod tes, yog tias tus nqi nplawm siab dhau lawm, nws tuaj yeem ua rau hnav thiab tsim kua muag ntau dhau ntawm cov khoom siv, ua kom lub zog siv zog, thiab tseem tuaj yeem ua rau tsim cov vortexes uas tuaj yeem cuam tshuam cov txheej txheem leaching. Piv txwv li, nyob rau hauv ib tug loj-scale kub cyanidation cog, nce tus nqi stirring los ntawm tus qauv 400 rpm mus rau 500 rpm ua rau ib tug 5% nce nyob rau hauv kub leaching tus nqi, tab sis ntxiv nws mus rau 600 rpm tsuas yog ua rau ib tug marginal 1% nce, thaum lub zog noj nce los ntawm 20%.

4. Kev txiav txim siab zoo tshaj plaws stirring

4.1 Xav txog Ore yam ntxwv

Qhov zoo tshaj plaws nplawm tus nqi rau cyanide leaching nyob ntawm ntau yam, nrog rau cov yam ntxwv ntawm cov ore yog ib qho tseem ceeb xav txog. Rau cov ores nrog qhov loj me me, yuav tsum muaj kev sib zog ntau dua los xyuas kom meej tias cov tshuaj cyanide tuaj yeem nkag mus rau hauv qhov hws thiab hnov ​​​​mob nrog rau sab hauv ntawm cov khoom. Nyob rau hauv sib piv, rau nplua - grained ores, ib tug qis stirring tus nqi tej zaum yuav txaus kom cov hais nyob rau hauv ncua kev kawm ntawv thiab txhawb loj hloov. Tsis tas li ntawd, mineralogy ntawm cov ore tseem ceeb. Yog tias cov ore muaj cov zaub mov uas yooj yim oxidized los yog hnov ​​​​mob nrog cyanide ntawm tus nqi nrawm, tus nqi qis dua yuav raug siv los tswj cov tshuaj tiv thaiv thiab tiv thaiv kev noj ntau dhau ntawm sodium cyanide.

4.2 Sib npaug Leaching Rate thiab Nqi

Ntxiv nrog rau cov yam ntxwv ore, tus nqi - kev ua tau zoo ntawm cov txheej txheem leaching kuj plays lub luag haujlwm hauv kev txiav txim siab qhov zoo tshaj plaws stirring tus nqi. Ib tug ntau dua stirring tus nqi feem ntau yuav tsum tau ntau zog, uas ua rau kom tus nqi khiav hauj lwm ntawm cov nroj tsuag. Yog li ntawd, qhov sib npaug yuav tsum raug ntaus ntawm kev ua tiav qhov siab leaching tus nqi thiab txo qis kev siv zog. Qhov no feem ntau suav nrog kev txheeb xyuas kev lag luam uas coj mus rau hauv tus account yam xws li tus nqi ntawm cov hlau raug rho tawm, tus nqi ntawm sodium cyanide, thiab cov nqi hluav taws xob cuam tshuam nrog cov nqi sib txawv. Piv txwv li, yog hais tias tus nqi ntawm kub yog siab thiab tus nqi ntawm lub zog yog tsawg, ib tug me ntsis siab stirring tus nqi yuav raug xaiv los ua kom lub kub leaching tus nqi. Txawm li cas los xij, yog tias tus nqi ntawm lub zog yog qhov kev txhawj xeeb loj, tus nqi qis qis yuav raug xaiv txawm tias nws ua rau qis qis qis dua.

5. Cov kev sib tw nrog rau kev kho tus nqi sib tw

5.1 Kev txwv cov khoom siv

Ib qho ntawm cov kev sib tw hauv kev kho tus nqi nplawm yog qhov kev txwv ntawm cov khoom siv. Tus tsim ntawm cov leaching tso tsheb hlau luam, lub zog ntawm lub motors tsav lub stirrers, thiab lub zog txhua yam ntawm impellers tag nrho txwv qhov ntau ntawm stirring tus nqi uas yuav ua tau tiav. Qee qhov xwm txheej, kev txhim kho cov cuab yeej siv kom ua tiav qhov siab dua lossis ntau dua tus nqi nplawm yuav xav tau kev nqis peev tseem ceeb. Piv txwv li, yog tias cov nroj tsuag xav kom nce tus nqi nplawm tshaj li qhov siab tshaj plaws tam sim no, nws yuav tsum tau hloov cov motors uas muaj zog dua thiab txhim kho cov impellers muaj zog, uas tuaj yeem yog qhov kev sim siab.

5.2 Txheej txheem Instability

Hloov tus nqi stirring kuj tuaj yeem ua rau cov txheej txheem tsis ruaj khov. Tam sim ntawd nce los yog txo tus nqi nplawm tuaj yeem cuam tshuam cov qauv ntws hauv lub tank leaching, ua rau tsis sib xws ntawm cov ore hais thiab cov tshuaj cyanide. Qhov no tuaj yeem ua rau muaj qhov tsis sib xws ntawm cov leaching thiab tej zaum yuav ua rau muaj qhov kub thiab txias hauv lub tank, qhov twg cov tshuaj tiv thaiv yog siab dhau lossis qis dhau. Piv txwv li, yog hais tias tus nqi stirring yog txo qis heev, cov ore hais tej zaum yuav pib nyob rau hauv tej qhov chaw ntawm lub tank, ua rau ib tug txo nyob rau hauv tag nrho cov leaching efficiency.

6. xaus

Tus nqi nplawm muaj qhov cuam tshuam tseem ceeb rau qhov leaching tus nqi ntawm sodium cyanide hauv cov txheej txheem cyanide leaching. Los ntawm kev txhim kho huab hwm coj hloov pauv thiab tiv thaiv particle sedimentation, qhov tsim nyog stirring tus nqi tuaj yeem txhim kho kev ua haujlwm ntawm cov txheej txheem leaching. Txawm li cas los xij, kev txiav txim siab qhov zoo tshaj plaws stirring tus nqi yuav tsum tau ua tib zoo xav txog cov yam ntxwv ore thiab tus nqi - kev ua tau zoo. Tsis tas li ntawd, cov teeb meem xws li kev txwv cov cuab yeej thiab cov txheej txheem tsis ruaj khov yuav tsum tau daws thaum kho tus nqi sib tw. Kev tshawb fawb ntxiv hauv cheeb tsam no tuaj yeem tsom mus rau kev tsim cov thev naus laus zis ua kom zoo dua qub thiab ua kom zoo rau tag nrho cov cyanide leaching txheej txheem los txhim kho kev rov qab los ntawm cov hlau muaj txiaj ntsig thaum txo kev cuam tshuam ib puag ncig thiab cov nqi.