Raws li lub teb chaws muab qhov tseem ceeb rau kev tiv thaiv ib puag ncig, raws li cov khoom pov tseg, yuav ua li cas siv steel slag tau dhau los ua lub ntsiab lus tseem ceeb.Kab lus no qhia txog cov txheej txheem kev daws teeb meem rau steel slag recycling.Dry processing thev naus laus zis yuav tsum ua kom muaj txiaj ntsig zoo ntawm cov hlau ntawm ib sab thiab kev siv cov khoom pov tseg ntawm lwm tus.Cov kauj ruam hauv qab no steel slag ua tau piav qhia: Xaiv crushing;Sib nqus sib cais thiab lub luag haujlwm ntawm cov cuab yeej tshiab ib leeg-tsav high-pressure roller zeb hauv kev siv dav hlau slag;Kev siv cov cuab yeej tshiab tuaj yeem txo tus nqi ntawm steel slag crushing, yog li tsim cov txiaj ntsig ntau dua rau kev siv steel slag.Kev nce qib ntawm kev siv dav dav ntawm steel slag tau tsim muaj peev xwm.Kev nce qib ntawm lub tswv yim zoo no hauv kev lag luam yuav tsum muaj kev sib koom tes ntawm cov tuam txhab tsim steel, cov kws tshaj lij thiab cov kws tshawb fawb, kev siv tag nrho ntawm daim ntawv thov, thiab kev lag luam thiab kev txhawb nqa.
Kev tsim kho siv steel slag
1) Steel slag yog siv los tsim cov cement thiab pob zeb sib xyaw.Cov hlau slag muaj cov ntxhia ua haujlwm xws li tricalcium silicate (C3S), dicalcium silicate (C2S) thiab hlau aluminate nrog hydraulic cementing zog, uas yog raws li cov yam ntxwv ntawm cov cement.Yog li ntawd, nws tuaj yeem siv los ua cov khoom siv raw thiab cov cement admixture rau kev tsim cov cement tsis-clinker, tsawg clinker cement.Steel slag cement muaj cov yam ntxwv zoo xws li hnav tsis kam, siab flexural zog, corrosion kuj thiab Frost tsis kam.
2) Steel slag hloov pob zeb crushed thiab nplua aggregate.Steel slag crushed pob zeb muaj qhov zoo ntawm lub zog siab, ntxhib nto, hnav tsis kam thiab ua haujlwm ntev, ntim loj, ruaj khov, thiab ruaj khov ua ke nrog asphalt.Piv nrog rau cov pob zeb crushed zoo tib yam, nws kuj yog resistant rau Cov yam ntxwv ntawm qhov kub thiab txias tawg, yog li nws tuaj yeem siv dav hauv txoj kev engineering backfill.Steel slag, raws li railway ballast, muaj cov yam ntxwv ntawm tsis cuam tshuam rau txoj kev tsheb ciav hlau txoj kev sib txuas lus ua hauj lwm thiab zoo hluav taws xob conductivity.Vim cov hlau slag muaj dej permeability zoo thiab cov kua dej, cov cementitious Cheebtsam hauv nws tuaj yeem ua rau nws nyuaj rau hauv cov khoom loj.Steel slag kuj yog tsim rau kev tsim kho nyob rau hauv swamps thiab ntug hiav txwv dej.
Tam sim no, feem ntau siv hauv tsev steel slag siv txoj kev yog crushed steel slag mus rau -5 hli los hloov dej xuab zeb ua cov khoom siv hauv tsev, los yog rau pob-mill cov crushed steel slag rau hauv cov hmoov zoo siv los ua cov cement additive.Shandong Huate Magnetoelectric Technology Co., Ltd. kuj tau ua qhov kev tshawb fawb tob txog kev siv cov hlau slag, innovatively siv ib leeg-tsav high-pressure roller zeb rau nplua crushing steel slag, txhim kho cov hlau slag ua technology, thiab tau txais txiaj ntsig zoo ntawm kev lag luam.Nws tau ua tiav nyob rau hauv Pangang Mining thiab ib qho kev lag luam steel slag hauv Lianyungang.
Cov txheej txheem tsim khoom ib txwm siv ntawm steel slag yog raws li hauv qab no:
1) Cov khoom loj yog crushed nrog lub puab tsaig crusher rau -50, thiab cov hlau nplaum sib nqus yog sib cais nrog cov hlau nplaum sib nqus.
2) Teem qhov sib cais loj ntawm cov hlau mus rau +45 hli.Qhov seem 0-45 hli feem ntau yog siv los ua txoj kev tsim kho thiab ntim cov ntaub ntawv.Txhawm rau nce nws daim ntawv thov tus nqi, steel slag tuaj yeem muab faib ua 0-4, 4-8 thiab lwm qib sib txawv.Lub tshuab yuav tsum tau muaj peev txheej tsawg thiab cov nqi khiav haujlwm tsawg.Txawm li cas los xij, ntau tshaj 50% ntawm cov ntsiab lus hlau nyob rau hauv slag yog concentrated nyob rau hauv -10 mm quab yuam, yog li no technology yuav ua rau feem ntau ntawm cov hlau poob, tab sis cov ntsiab lus hnyav hlau yuav nce.
Yog li ntawd, kev sib tsoo ntub dej ntub tau siv dav tshwj xeeb tshaj yog rau cov slag uas tsim los ntawm cov hlau alloy uas muaj qib siab Cr, Ni, Mo, thiab lwm yam. Cov txheej txheem xws li crushing thiab ob-kauj ruam zoo sib tsoo ( qws zeb / pob zeb ).Txij li cov hlau nrog ductility tsis yooj yim rau kev zom, kev sib cais ntawm cov hlau thiab steel slag tuaj yeem ua tiav los ntawm kev sib cais los yog kev faib tawm.Qhov zoo ntawm cov ntxhia ib feem ntawm cov slag feem ntau yog siab dua 95% thiab qis dua 0.2 hli.Cov hlau rov qab tus nqi ntawm cov txheej txheem no tshaj 95%, thiab cov txiaj ntsig ntawm cov hlau ua kom pom tseeb yog 90 mus rau 92%.Los ntawm qhov kev xav ntawm kev sib cais cov hlau thiab slag, cov txheej txheem no tuaj yeem hais tias yog txheej txheem zoo tshaj plaws.
Lub ntsiab tsis zoo ntawm cov txheej txheem no yog qhov sib cais steel slag yog nplua-grained slurry.Vim tias cov txheej txheem yog cov txheej txheem ntub dej, nws nyuaj rau kev siv hauv kev tsim vaj tsev.Yog li ntawd, feem ntau ntawm cov hlau slag cov khoom seem tom qab xaiv cov hlau raug muab pov tseg, thiab qhov no feem ntau yog vim cov nqi ntub dej qhuav thiab kev txwv kev cai thoob ntiaj teb.Txhua daim ntawv thov tus nqi siab dua yuav tsum muaj lwm txoj hauv kev los kho cov sludge ntub dej (qhuav, thickening, thiab lwm yam).
Ib qho kev xaiv feem ntau yuav tsum tau ua los ntawm cov hlau rov qab los yog qhov muaj cov slag ntxiv.Feem ntau, qhov kev xaiv no nyob ntawm tus nqi ntawm cov hlau rov qab.
Cov txheej txheem nquag nyob rau theem no yog raws li hauv qab no:
Cov khoom loj yog crushed nrog lub puab tsaig crusher rau -50, thiab cov hlau nplaum sib nqus yog sib cais nrog cov hlau nplaum sib nqus.
-50 steel slag yog crushed los ntawm rauj crusher los yog lub khob hliav qab crusher, cuam tshuam crusher, sieved los ntawm ntau txheej sieve, -20-10 grit khoom yuav siv tau raws li gravel, -10-1 grit khoom yuav siv tau raws li zoo xuab zeb.
Table I
Kev tsom xam ntawm qhov loj me ntawm 50mm pub rau rauj crusher
-10 grain steel slag yog hauv av rau hauv lub pob zeb qhuav rau hauv -200 mesh hmoov zoo, thiab tom qab ntawd siv electromagnetic qhuav hmoov sib nqus sib nqus yog siv los tshem tawm cov hlau ua cov cement additive.
Lub sij hawm xa tuaj: Plaub Hlis-12-2021