Kafukufuku pa Arsenic Inhibition ndi Sulfur-Iron Enrichment mu Cyanidation Tailings

Introduction

Matope a cyanidation omwe amapangidwa panthawi yotulutsa zinthu m'makampani opanga zitsulo amabweretsa mavuto akulu azachilengedwe chifukwa cha kuchuluka kwa arsenic. Kuwonjezera pa nkhawa zazachilengedwe, matope awa ndi omwe angakhale chuma chachiwiri. Chifukwa chake, ndikofunikira kupanga njira zothandiza zowonjezerera zinthu zamtengo wapatali monga sulfure ndi chitsulo pomwe kuchepetsa kuchuluka kwa arsenic. Kafukufukuyu akuyang'ana kwambiri matope a cyanidation ochokera ku smelting, cholinga chake ndi kukwaniritsa zolinga izi kudzera mu njira yoyandama bwino.

Njira

Zitsanzo Source

Ma cyanidation tailings omwe amagwiritsidwa ntchito mu phunziroli adatengedwa kuchokera ku smelter inayake. Zitsanzo zoyambazo zidadziwika kuti zimvetsetse kapangidwe kawo koyambira komanso ma mineralogical asanayambe kuyesa kuyandama.

Kuyesera kwa Flotation

Asidi wa sulfure (H_2SO_4) adagwiritsidwa ntchito ngati sulfure activator. Kuphatikiza kwa sodium humate ndi calcium hypochlorite (Ca(ClO)_2) kunagwiritsidwa ntchito ngati arsenic inhibitor. Kuyesa koyandama kambiri kunachitika pansi pamikhalidwe yoyendetsedwa bwino. Magawo oyesera, kuphatikiza mlingo wa reagent, kuchuluka kwa zamkati, ndi nthawi yoyandama, adakonzedwa kuti akwaniritse zotsatira zabwino kwambiri zolekanitsa.

Njira za Analytical

Scanning Electron Microscopy (SEM) ndi X-ray Diffraction (XRD) adagwiritsidwa ntchito kusanthula zinthu zoyandama. SEM idagwiritsidwa ntchito kuyang'ana mawonekedwe a pamwamba ndi mawonekedwe a tinthu ta zitsanzo. Kusanthula kwa XRD kunathandizira kuzindikira magawo a mineralogical omwe amapezeka m'zitsanzozo, ndikuwunikira momwe arsenic amapezeka mkati mwa michira ya cyanidation.

Results

Kuyesera koyandama kunawonetsa zotsatira zabwino kwambiri. Mlingo wa sulfure m'gululi unafika pa 48%, pomwe arsenic grade adachepetsedwa mpaka kuchepera 0.2%. Zotsatirazi zikuwonetsa mphamvu ya ma reagents osankhidwa ndi njira yowongoleredwa yoyandama pakukwaniritsa zolinga zapawiri za sulufule-chitsulo chowonjezera komanso kuchotsa arsenic.

Kukambirana

Zochitika State of Arsenic

Kupyolera mu kusanthula kwa SEM ndi XRD, kupezeka kwa arsenic muzitsulo za cyanidation kunatsimikiziridwa. Arsenic inapezeka kuti imagwirizanitsidwa ndi mchere wina, womwe unakhudza khalidwe lake panthawi yoyandama. Kumvetsetsa zomwe zikuchitikazi ndizofunikira kwambiri kuti pakhale njira zolekana.

Zifukwa Zolekanitsa Zovuta za Sulfure ndi Arsenic

Kafukufukuyu adachitanso kufufuza koyambirira kwa zifukwa zomwe zimachititsa kulekanitsa kovuta kwa sulfure ndi arsenic mu michira ya cyanidation. Zinthu monga kufalitsa bwino kwa mchere wokhala ndi arsenic, kuyanjana kwapansi pakati pa mchere wosiyanasiyana, ndi zovuta za mankhwala a tailings zinapangitsa kuti izi zikhale zovuta. Kugwiritsa ntchito kuphatikiza kwa (H_2SO_4), sodium humate, ndi (Ca(ClO)_2) kunachepetsa zovutazi pamlingo wina, monga zikuwonekera ndi zotsatira zabwino zoyandama.

Kutsiliza

Kafukufukuyu adapanga bwino njira yoyandama yolemeretsa chitsulo cha sulfure ndikuchotsa arsenic ku michira ya cyanidation. Kugwiritsa ntchito (H_2SO_4) monga sulfure activator komanso kuphatikiza kwa sodium humate ndi (Ca(ClO)_2) monga arsenic inhibitor kunakhala kothandiza. Kusanthula kwa SEM ndi XRD kunapereka chidziwitso chofunikira pazochitika za arsenic ndi zifukwa za kulekanitsa kovuta kwa sulfure-arsenic. Kafukufuku wamtsogolo atha kuyang'ana kwambiri kukhathamiritsa njira yoyandama, kuyang'ana ma reagents ena, ndikuwongolera bwino pakubwezeretsanso zinthu komanso kuteteza chilengedwe.