5 Hom Cov Khoom Siv Hluav Taws Xob Rau Rotary Kilns
Rotary kiln, feem ntau hu ua rotary kiln, yog lub tog raj kheej steel, lined nrog cov khoom siv refractory. Nyob rau hauv txoj kev ntawm rotating ntau lawm, nyob rau hauv lub tsev cov ntaub ntawv, metallurgy, tshuaj, ib puag ncig tiv thaiv thiab lwm yam industries, cov khoom yog calcined. Kev lag luam cement muaj ntau tshaj plaws ntawm cov rotary kilns, muaj ntau txhiab ntawm lawv nyob rau hauv lub teb chaws, ua raws li tus naj npawb ntawm rotary kilns siv dub thiab tsis-ferrous metallurgy, hlau, txhuas, tooj liab, zinc, tin, nickel, tungsten, chromium. thiab lwm yam hlau nrog rotary kilns rau ore thiab intermediate calcination. Thiab calcination ntawm active txiv qaub raws li ib tug steelmaking flux thiab ntau yam kev siv dolomite (yuav siv tau raws li converter steelmaking slag tus neeg saib xyuas, hlau magnesium raw cov ntaub ntawv, refractory raw cov ntaub ntawv, thiab lwm yam), calcined magnesia, aluminium magnesium spinel, bauxite, tawv av nplaum thiab lwm yam. refractory raw khoom. Nws tseem tuaj yeem calcination tsawg lub ntiaj teb, ceramic hais, incineration pov tseg thiab lwm yam. Cov ntaub ntawv calcined sib txawv, qhov kub ntawm qhov cub hluav taws kub kuj txawv, qee qhov kub siab tshaj plaws txog 2000 degree, qee qhov tsawg dua 1000 degree.
Txawm li cas los xij, lawv txoj haujlwm ua haujlwm yog tib yam, cov khoom nkag los ntawm lub qhov cub tawg, lub taub hau ntawm lub qhov cub tau tawm, raws li qhov sib txawv ntawm qhov kub ntawm qhov cub, nws tau muab faib rau hauv qhov cub, pre-tropical, kub kub cheeb tsam (tseem hu ua calcining zone), txias zone, kiln taub hau (qee qhov kev lag luam subdivisions thiab yav dhau los hloov chaw, tom qab hloov chaw) thiab lwm ntu. Cov refractories xaiv rau txhua ntu yog sib txawv, tab sis qhov kev puas tsuaj mechanism ntawm refractories yeej yog tib yam, uas yog, cov ntaub ntawv refractory ntawm lub qhov cub hauv ob sab phlu tig nrog lub plhaub, raug kev nyuaj siab generated los ntawm kev sib hloov ntawm lub kiln lub cev, thiab raug cuam tshuam los ntawm kev sib tsoo, kev sib txhuam, yaig thiab lwm yam kev cuam tshuam ntawm cov ntaub ntawv kub. Vim yog cov khoom sib txawv, cov khoom siv refractory ntawm lub hauv ob sab phlu kuj txawv.
Txhawm rau txhim kho lub neej kev pab cuam ntawm lub hauv ob sab phlu, ntxiv rau kev xaiv cov khoom siv refractory tsim nyog, nws yog ib qho tsim nyog yuav tsum tau txhim kho cov cuab yeej siv hluav taws xob hauv tsev, nrog rau kev saib xyuas thiab kho thev naus laus zis ntawm cov khoom siv hauv tsev. Ntawm cov rotary kilns nyob rau hauv ntau industries, tus sawv cev cement kilns, dolomite thiab txiv qaub kilns, pellet kilns, zinc oxide kilns thiab pov tseg incineration kilns raug xaiv nyob rau hauv daim ntawv no.
Txawm hais tias cov ntaub ntawv calcined ntawm cov khoom siv hluav taws xob hauv ntau qhov kev lag luam sib txawv, txoj hauv kev ua haujlwm yog tib yam, yog li cov ntaub ntawv refractory ntawm lub hauv ob sab phlu kuj zoo ib yam thiab sib txawv, xws li hauv ob sab phlu yog muab faib ua cov khoom siv refractory sib txawv, thiab lub taub hau kiln. thiab tus Tsov tus tw yog tag nrho ua los ntawm siab aluminium qis cement thiab steel fiber castable. Kev xaiv cov khoom siv refractory sib txawv hauv kev lag luam sib txawv tau piav qhia hauv qab no.
Cement kiln
Nyob rau hauv thaum ntxov 1980s, lub refractory tshuab rau cement rotary kiln tau pib. Feem ntau, nyob rau hauv lub tog raj kheej ntawm loj SP thiab PC rotary kilns, qhov ncaj qha kev sib txuas magnesium-chrome cib rau kev siv hluav taws xob siv, lub siab aluminium cib rau txoj siv decomposition yog siv, thiab alkali resistant cib los yog av nplaum zoo tib yam. tom qab ntawm lub tog raj kheej. Thaum kawg ntawm lub xyoo pua 20th thiab pib ntawm lub xyoo pua 21st, Silmo cib tau tshwm sim, ntxiv rau txoj siv hluav taws xob, lub hauv ntej thiab sab nraub qaum ntawm qhov cub, qhov seem ntawm cov khoom siv sib txawv ntawm Silmo cib. Nyob rau hauv niaj hnub kev lag luam cement, qhov tshiab qhuav kiln yog qhov tseem ceeb ntawm kev txhim kho thev naus laus zis, qhov kub ntawm qhov hluav taws kub yog li 1450 ° C, thiab qhov kub ntawm cov roj kub hauv qhov cub tuaj yeem ncav cuag ntau dua 1700 ° C, los yog ze rau 2000 ° C.
Yuav kom ua tau raws li cov kev cai ntawm lub cim thib ob ntawm cov cement qhuav tshiab, cov khoom siv refractory xaiv yuav tsum muaj ntau yam haujlwm xws li kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, kev ua haujlwm ntev thiab kev ua haujlwm, kev nyab xeeb thiab ruaj khov. Yog li ntawd, txoj siv sintered siv magnesia ferro aluminium spinel cib es tsis txhob magnesia chrome cib (vim nws yog ib qho yooj yim los tsim hexavalent chromium uas yog tshuaj lom rau tib neeg lub cev), txoj kev hloov siv siv magnesia aluminium spinel cib, thiab sim ib tug tshiab composite cib nrog peb. txheej txheej (ua hauj lwm txheej, thermal rwb thaiv tsev txheej, thermal rwb thaiv tsev txheej) qauv, txheej ua hauj lwm muaj zog, hnav-resistant, corrosion-resistant mullite, thermal rwb thaiv tsev txheej yog zirconium alumina fiber board, thiab thermal rwb thaiv tsev txheej muaj lub zog siab. . Tsawg thermal conductivity thiab raws li lub cev pob txha los txuas cov txheej txheem ua haujlwm thiab cov txheej txheem cua sov, nyob rau hauv lub kiln 37 ~ 47m tshaj qhov cub plhaub ntawm daim tawv nqaij kub ntawm 60 degree qis dua lub cib, nrog rau kev siv cov cement av nkos, prefabricated. qhov chaw, thiaj li hais tias qhov loj-scale cement rotary kiln los ntawm ib xyoos overhaul mus rau peb xyoos ob overhaul txoj kev loj hlob.
Txiv qaub, dolomite kiln
Cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv tshuaj lom neeg ntawm txiv qaub thiab dolomite zoo ib yam, thiab qhov kub ntawm calcination yog tib yam, thiab qee lub tuam txhab siv txiv qaub thiab dolomite hauv kev sib hloov hauv tib lub kiln. Muaj peb hom refractory cov ntaub ntawv siv nyob rau hauv ob sab phlu, ib tug yog calcined magnesia-aluminium spinel cib, qhov kev hloov chaw yog siab aluminium cib, lub preheat zone yog av nplaum cib, lub tshav kub rwb thaiv tsev txheej yog refractory fiber los yog lub teeb ci ci, Qhov kub ntawm daim ntawv no ntawm qhov cub yog 300 ~ 350 degree, thiab lub neej hauv ob sab phlu yog 1 ~ 2 xyoos; Qhov thib ob calcination siv yog lub teeb spinel thiab hnyav sib xyaw cib, lub plhaub saum npoo kub yog qis dua 250 degree, thiab lub neej hauv ob sab phlu yog 2 ~ 3 xyoos; Qhov thib peb yog kev siv cov blocks prefabricated thiab castables los ua ib lub hauv ob sab phlu, qhov kub ntawm lub plhaub tseem qis dua 250 degree, thiab lub neej kuj yog 2 mus rau 3 xyoos.
Baosteel siv andalusite cib los hloov spinel composite cib nyob rau hauv 16.1 ~ 19.55m ntawm calcined cheeb tsam, qhov kub thiab txias ntawm kiln plhaub tau txo, qhov hnyav ntawm kiln raug txo, thiab kev ua tau zoo ntawm kiln daim tawv nqaij yog zoo. Tom qab 2 xyoos ntawm kev siv, cov tawv nqaij kiln raug tshem tawm, thiab cov cib andalusite tau khaws cia zoo, thaum cov khoom sib xyaw spinel cib tau tawg loj heev. Vim tias qhov tseeb qhov ceev ntawm andalusite qis dua li ntawm spinel, yog tias txoj siv calcined yog ua los ntawm andalusite bricks, qhov cub qhov hnyav yuav raug txo los ntawm 35t thiab lub plhaub kub yuav txo tau los ntawm 100 degree . Lub inlet, kiln taub hau thiab kiln tail yog raug cuam tshuam thiab hnav ntawm cov khoom loj, uas yooj yim rau kev puas tsuaj thiab spalling, thiab yog cov khoom nrog lub neej ua haujlwm luv tshaj. Wisco siv hnav-tiv taus thiab alkali-resistant castable, uas tau siv rau ntau tshaj 36 lub hlis tsis kho. Cov castable yog ua ke nrog homogenized bauxite clinker aggregate, SIC 1 ~ 0mm thiab hmoov zoo, SiO2, Al2O3 micro-hmoov, ultra-low cement.
Txoj siv tawv calcined yog ua los ntawm phosphate ua ke nrog cov uas tsis raug rho tawm haujlwm cib, qhov hnyav siv homogenized bauxite clinker ua lub ntsiab sib sau, ntxiv 4% andalusite ua tus neeg sawv cev nthuav dav, thiab txhim kho cov thermal shock resistance. Thermal rwb thaiv tsev txheej yog ua los ntawm alumina hollow npas thiab nthuav perlite 2∶1 cov khoom xyaw.
Kev siv cov cib sib xyaw ua ke thiab homogeneous cib nrog cov cua sov-insulating cib ob hom cib hauv ob sab phlu, kev pab cuam lub neej ntawm ntau tshaj 3 xyoos, qhov cub plhaub overheating teeb meem tau daws.
Nyob rau hauv txoj siv calcined, Angang hloov los ntawm magnesium-chromium cib rau magnesium-aluminium spinel cib nyob rau hauv 1992, thiab tom qab ntawd mus rau cov phosphate cib, ob txheej txheej rau cov qauv, los ntawm qhuav masonry rau ntub masonry, los ntawm sequential masonry mus misplaced masonry, Thiab tom qab ntawd mus rau kev sib xyaw masonry nrog prefabricated blocks thiab castables. Lub prefabricated blocks thiab castables lawv tus kheej yog embedded nrog hlau anchoring qhov chaw thiab yog ncaj qha consolidated rau lub plhaub steel. Lub prefabricated thaiv thiab castable yog embedded nrog ib txheej ntawm thermal rwb thaiv tsev cov ntaub ntawv, lub kiln plhaub yog txo los ntawm 320 degree mus rau 222 degree, thiab ib txheej ntawm NJS nanoscale microporous thermal rwb thaiv tsev xav tau ntxiv txhim kho nyob rau hauv lub tog raj kheej lub cev, kom lub plhaub yog txo los ntawm 220 degree mus rau 176 degree.
Pellet kiln (grate-rotary kiln)
Nyob rau hauv xyoo tas los no, tag nrho cov peev txheej ntawm cov pellets yog ntau tshaj 60 lab tons hauv ib xyoos, thiab qhov kub ntawm lub taub hau ntawm lub qhov cub yog 1150 ~ 1180 ° C, thiab qhov cub qhov cub yog 1050 ~ 1080 ° C. tau txais cheeb tsam ntawm lub nplhaib txias mus txog 1100 ~ 1300 degree. Kev xaiv cov ntaub ntawv refractory yuav tsum yog nyob ntawm kev siv ntau qhov chaw ntawm cov xwm txheej, cov grate tsuas yog hnav-resistant siab aluminium castable, lub teeb mullite castable, qee qhov castable siv thauj tog rau nkoj cib. Rotary kilns feem ntau yog ua los ntawm high alumina mullite prefabricated cib nrog thauj tog rau nkoj thiab castable ntawm tib yam khoom. Cov cib dai ntawm thawj ntu txias ntawm lub nplhaib txias yog hloov los ntawm cov tsis muaj phosphate cib kom raug rho tawm haujlwm siab aluminium cib, thiab lub cub tawg sab saum toj tau hloov mus rau qis cement castable, thiab lub neej kev pab cuam txuas ntxiv los ntawm ob peb lub hlis mus rau 2 xyoos.
Zinc oxide kiln
Rotary kiln yog cov cuab yeej tseem ceeb rau kev tsim cov zinc oxide los ntawm txoj kev tua hluav taws. Tus neeg sawv cev txo qis xws li coke hmoov yog ntxiv rau hauv tus nqi, thiab qhov tsis zoo ntawm zinc hlau yog siv. Cov hlau zinc vapor nkag mus rau hauv cov roj flue thiab tsim zinc oxide thaum nws ua tau raws li cov pa oxygen hauv qhov kub thiab txias. Cov hlau ntau lawm ua rau cov plua plav plua plav loj, uas muaj zinc. Nrog rau kev tsim cov hlau thiab hlau, zinc oxide rotary kiln kuj tau tsim. Ib lub tshuab hluav taws xob ntawm cov nroj tsuag siv cov av nplaum rau ziab ua ntej cua sov, thaum cuam tshuam rau kev pab cuam lub neej ntawm cov tshuaj tiv thaiv rau thaj tsam txias.
Siv bauxite clinker, fused magnesia, hluavtaws magnesia alumina spinel, SiO2, Al2O3 micro-hmoov cov khoom xyaw, calcium aluminate cement bonding, ntxiv dej txo tus neeg sawv cev thiab tawg-pov thawj fiber ntau castable thiab prefabricated cib, tsau nrog anchoring qhov chaw, cov nyhuv yog zoo nyob rau hauv Qhov kub kub ntawm zinc oxide rotary kiln. Nyob rau hauv txoj kev no, cov xwm txheej zoo tau txais rau kev tsim cov khoom sib xyaw.
Rotary kiln rau alumina thiab lwm yam kev siv
Alumina kiln firing kub ntawm 1050 ~ 1300 degree, kev sim siab dhau ntawm txhuas cib, magnesium cib tsis zoo tagnrho, thiab kev siv cov tshuaj tiv thaiv tev siab aluminium cib dai kiln ntawm daim tawv nqaij, kev siv zoo dua.
Petroleum coke kiln, siv los ua cov txheej txheem casting, siv sijhawm ntev, shrinkage loj, lub neej luv. Nws yog qhov zoo dua los siv prefabricated composite cib nrog thauj tog rau nkoj ntsia hlau thiab castable composite masonry.
Hlawv cov khib nyiab pov tseg, txawm hais tias qhov kub ntawm kev siv yog li 800 ~ 1200 degree, tab sis vim muaj cov khoom pov tseg nyuaj, kev yaig ntawm cov ntaub ntawv refractory yog qhov hnyav dua, qee cov neeg xaiv qhov kub siab tshaj plaws masonry chrome corundum cib. Qee tus neeg kuj siv cov av nplaum cib thiab zirconium chromium corundum cib ob chav sib xyaw.
Lateite nickel kiln, rotary kiln ncaj qha txo qis ntawm cov txheej txheem nickel-hlau, nws cov txheej txheem muaj cov kev xav tau siab rau cov ntaub ntawv refractory, siv cov microporous magnesia-aluminium-zirconium cib rau 1 xyoo, cov cib hnav tsuas yog li 10%.
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