Pyrite raug rho tawm haujlwm hauv ntau lub tebchaws

Pyrite raug rho tawm haujlwm hauv ntau lub tebchaws
Pyrite raug rho tawm haujlwm hauv ntau lub tebchaws

Video: Pyrite raug rho tawm haujlwm hauv ntau lub tebchaws

Video: Pyrite raug rho tawm haujlwm hauv ntau lub tebchaws
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Pyrite yog lub npe ntawm ib pawg ntawm cov zaub mov uas yog cov sib xyaw ntawm cov hlau los ntawm pawg tin, npib tsib xee, hlau, cob alt, platinum. Cov tshuaj tuaj yeem yog sulphurous thiab arsenic, lossis antimony lossis selenium.

pyrite roasting
pyrite roasting

Pyrite roasting xav tias cov khoom siv raw muaj xim lub teeb, nws yog xim hlau ci, hardness ntawm 3 mus rau 7. Hlau los yog sulfur pyrite (FeS2 mis), los yog pyrite, yog ib qho khoom siv tseem ceeb ntawm cov sulfur dioxide. yog tau (chamber ntau lawm). Nyob rau hauv tsos, cov ntxhia yog ib tug loj ntawm me me, tsis tu ncua-zoo li yellowish-grey crystals nrog ib tug hardness ntawm 6-6.5. Cov muaj pes tsawg leeg ntawm ntshiab pyrites muaj li 47 feem pua ntawm hlau thiab txog 53 feem pua sulfus.

Roasting pyrite yog nrog los ntawm cov tshuaj lom neeg cov tshuaj tiv thaiv, uas yog thawj zaug muab cov pob zeb decomposition rau hauv cov hlau sulfide thiab sulfur hauv lub xeev vapor (ntawm qhov kub txog li 500 C). Tom qab ntawd cov sulfur vapor hlawv, muab sulfur dioxide, thiab hlau sulfide muab oxide los yog nitrous oxide. Ntxiv mus, cov sulfide burns tawm tsis tiav, tsim"Cinder", uas tej zaum yuav muaj xws li fayalite thiab lwm yam tshuaj, nyob ntawm seb cov impurities nyob rau hauv feedstock.

pyrite roasting
pyrite roasting

Roasting pyrites tuaj yeem tsim qee qhov SO3 sib xyaw nrog SO2 hauv theem roj. Cov khoom no ua rau cov khoom siv hauv txoj kev corrosive, yog li ntawd, txhawm rau txo SO3, cov roj kub ntawm qhov hluav taws xob ntawm cov cuab yeej siv hluav taws xob yuav tsum yog li 850C, thiab tom qab ntawd txo qis mus rau 400C.

Roasting pyrites yog xyaum nyob rau ntau lub teb chaws, vim cov khoom no yog ib qho ntawm feem ntau siv. Nyob rau hauv Russia, cov pob zeb no yog mined ntawm lub Soymenskaya dacha, lub Kalitvinsky deposit, nyob ze Kushva, nyob rau hauv lub Bogoslovsky factories, nyob rau hauv lub Caucasus, nyob rau hauv lub Ryazan thiab Smolensk cheeb tsam, thiab nyob rau hauv lwm qhov chaw. Spanish deposits yog tshwj xeeb tshaj yog nto moo nyob rau hauv txawv teb chaws (tshwj xeeb tshaj yog Aguas Tenidas, qhov twg cov khoom tsis muaj tooj liab, tab sis muaj ib tug siab sulfur ntsiab lus), nyob rau hauv tas li ntawd, kev loj hlob nyob rau hauv teb chaws USA, Fabkis, Norway, thiab Sweden yog exploited. Arsenic ntau yam ntawm cov tshuaj no feem ntau yog tov nrog sulfur pyrite nyob rau hauv cov xwm, uas muab ib tug heev teeb meem impurity thaum lub sij hawm tsim khoom nyob rau hauv cov chav. Yog li ntawd, manufacturers sim siv cov ntaub ntawv ntshiab. Piv txwv li, Lavxias teb sab nroj tsuag nyob rau hauv St. Petersburg yog powered los ntawm Swedish pyrites.

hlau pyrite roasting
hlau pyrite roasting

Roasting hlau pyrites (nrog rau sulfur pyrites) yog ua nyob rau hauv qhov cub, qhov twg raw cov ntaub ntawv yog pub los ntawm ib tug ntsia hlau los yog nozzles. Tom qab ntawd nws yog tov nrog cov khoom loj ntawm cov khoom uas twb muaj lawm nyob rau hauv chav tsev (nyob rau hauv ib tug fluidized txaj ntawm grate, nyob rau hauv uas huab cua yog nkag los ntawm hauv qab no), tom qab ntawd. Cov tshuaj lom neeg tshwm sim, muab cov pa roj (tso tawm) thiab cinder (ib nrab nchuav los ntawm cov kav dej tshwj xeeb). Tsis tas li ntawd, cov cua sov ntau dhau raug tshem tawm ntawm qhov cub nrog kev pab ntawm cov dej txias.

Roasting pyrites yuav ua tiav yog tias qhov chaw sib cuag ntawm cov khoom siv nrog huab cua loj txaus. Yog li ntawd, cov pob zeb hauv av feem ntau ua tiav hauv lub xeev plua plav (hauv qhov tsim nyog rau qhov cub), thaum qhov loj me me uas oxygen nkag mus rau hauv cov khoom loj. Tsis tas li ntawd, kev tswj hwm kub yog qhov tseem ceeb, vim. Cov ntxhia hauv cov chav kawm no feem ntau sintered ntawm qhov kub siab tshaj 900 C. Txhawm rau daws qhov teeb meem no, kev ua haujlwm hauv cov hmoov av-cua sib tov kuj tseem siv tau, uas tso cai rau cov khoom siv raw rau qhov kub thiab txias txog li 1000 C, uas ua rau cov khoom tsim tawm. efficiency.

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