Roasting pyrite hlahisoang linaheng tse ngata

Pyrite - lebitso la sehlopha sa le liminerale, e leng metsoako ea tšepe e tsoang sehlopha sa thini, nikele, tšepe, cobalt, polatinamo. Metsoako e ka ba e le sebabole le arsenic, le tin-selenium kapa.

Calcination pyrite bontša hore feedstock o bobebe ka 'mala, benya metallic, thatafala tsa thepa ho tloha 3 ho ea ho 7. tšepe kapa tšepe pyrite (FeS2 moralo), tsejoang hape e le pyrite, ke ea bohlokoa liindastering tala ho tloha eo dioxide e sebabole (liseleng tlhahiso ea). Ka ponahalo, matsoai ke le boima ba kristale se senyenyane sa mofuta o nepahetseng oa yellowish-grey ka 'mala le thatafala tsa 6-6.5. Sebopeho bo hloekileng pyrite kenyelletsa ditokiseletso ka 47 etsang liphesente tse tšepe le ka 53 etsang liphesente tse sebabole.

Calcination pyrites tsamaea le temana ea 'maloa tsa lik'hemik'hale, ea pele e nehelana ka atolosoa ha sulfide matsoai tšepe le sebabole ka boemo mouoane (mocheso ka bang 500 C). Ebe mouoane sebabole li combusted, a le fa dioxide e sebabole, le tšepe oxide e kapa sulfide fana tsoakiloeng oxide e. Moo sulphide chesoa incompletely, eaba ba etsa "kerese," e leng se ka 'na a akarelletsa fayalite le tse ling tse dintho tse, ho itšetlehile ka litšila feedstock ena.

Calcination pyrites a ka hlahisa ka mohato ea khase e itseng eo di ea SO3, admixed le SO2. ntho ena sebetsang sebakeng sa hae ka tsela e thepa ho ts'enyeho, kahoo ho fokotsa SO3 khase mocheso ka sehokelo sa thepa sebōpi e lokela ho ba ka 850S, 'me joale ka potlako le tlohele ho 400C.

Roasting pyrite e sebelisitseng linaheng tse ngata, e le ntho ena ke ea lintho tse tloaelehileng. Russia, matsoai ena e epilwe naheng Soymenskoy, Kalitvinskom ea tšimo, ka Kushva, dimela tsa thuto ea bolumeli tsa Caucasus, ho Ryazan le Smolensk libaka, 'me libakeng tse ling. Naheng e 'ngoe, haholo-holo e tummeng Spain mobung (haholo-holo Aguas Tenidas moo boitsebiso boo ha e na le koporo, empa o na le dikahare phahame sebabole) e ka ho eketsehileng a tlatlapa ka ntshetsopele ya US, France, Norway, Sweden. pyrites Sulfuric tsa tlhaho hangata e admixed mefuta arsenic ya ntho, e leng e fana ka se hloeke kotsi haholo ka ho hlahisa ka lisele tsa tsona li. Ka lebaka leo, bahlahisi leka ho sebelisa thepa e hloekileng e tala. Ka mohlala, Russia lifektheri St. Petersburg, ho sebetsa ka pyrites Seswedishe.

Roasting tsa pyrites tšepe (le sebabole) e entsoeng ka sebopi, moo boitsebiso bo tala feptjoang ka nsete kapa nozzle. Ho feta moo, ho e tsoakane le le boima ba lintho tse bonahalang tiileng eo e se e ka aggregate (ka bethe fluidized ka grate ka, tlas'a e leng moea o fuoa ho tloha mona ka tlase), ka mor'a moo le lik'hemik'hale etsahala, ho fana ka khase (tlosoa) le kerese (tšela liphaephe karolo e 'ngoe e khethehileng). Le eena a tsoang sebōpi feteletseng mocheso tlosoa ke likarolo metsi tsidifatso.

Calcination pyrite tla atleha haeba ka ikopanya le holim'a metsi le fepa ka moea ke ho lekaneng phahameng. Ka hona, diminerale hangata sebetswa ka boemong ba ho pulverized (ka sebopi loketseng ho tse), ha phatsa boholo e joalo e nyenyane eo oksijene habonolo kenella ka hare ho ka hare le boima ba ntho. Ho phaella moo, taolo mocheso ke bohlokoa hobane liminerale ka tlelaseng ena ba atisa ho sintered ka thempereichara e ka holimo ho 900 C. E le hore ho rarolla bothata bona e boetse e sebelisoa e le lokisa motsoako le lerole le-moeeng, e leng lumella ho qala thepa ea ho chesa ka thempereichara e ho fihlela ho 1000 C, e leng ntlafatsa tlhahiso ea bokgoni.