Lub luag haujlwm tseem ceeb ntawm ntsuab silicon carbide hmoov hauv cov ntaub ntawv refractory
Ntsuab silicon carbide hmoov, lub npe suab tawv. Nws yog qhov tseem ceeb ntawm homsilicon carbide (SiC), uas yog smelted ntawm ntau tshaj 2000 degrees nyob rau hauv ib tug tsis kam rauv nrog raw cov ntaub ntawv xws li quartz xuab zeb thiab roj av coke. Txawv ntawm qhov sib txawvdub silicon carbide, nws muaj meej tswj cov txheej txheem nyob rau hauv lub tom qab theem ntawm smelting, nrog tsawg impurities thiab siab siv lead ua purity, yog li nws nthuav ib tug tshwj xeeb ntsuab los yog tsaus ntsuab xim. Qhov "purity" no ua rau nws yuav luag hnyav heev (Mohs hardness yog siab li 9.2-9.3, thib ob tsuas yog pob zeb diamond thiab boron carbide) thiab thermal conductivity zoo heev thiab lub zog kub. Hauv cov khoom siv refractory, nws yog "cov pob txha tawv" uas tuaj yeem tiv taus, sib ntaus, kub thiab tsim.
Yog li, yuav ua li cas cov hmoov ntsuab no qhia nws lub zog nyob rau hauv lub ntiaj teb hnyav ntawm cov ntaub ntawv refractory thiab dhau los ua "tus txiv neej tseem ceeb" uas tsis tseem ceeb?
Txhim kho lub zog thiab cam khwb cia kub "steel pob txha": cov ntaub ntawv refractory feem ntau ntshai ntawm "tsis muaj peev xwm tiv tau" qhov kub thiab txias, ua mos thiab tawg.Ntsuab silicon carbide micropowdermuaj cov hardness tsis tshua muaj siab thiab zoo heev high-temperature zog. Ntxiv rau ntau yam refractory castables, ramming cov ntaub ntawv los yog cib yog zoo li ntxiv high-strength steel mesh rau pob zeb. Nws tuaj yeem tsim cov pob txha txhawb nqa hauv matrix, zoo heev tiv thaiv qhov deformation thiab softening ntawm cov khoom nyob rau hauv qhov kub thiab txias load. Cov castables ntawm lub qhov cub tawg hlau channel ntawm cov nroj tsuag loj steel siv cov ntaub ntawv zoo tib yam ua ntej, uas eroded sai sai, cov hlau ntws tsis tuaj yeem nce ntxiv, thiab kev saib xyuas tsis tu ncua ncua ntau lawm. Tom qab ntawd, technical breakthroughs tau ua, thiab kev faib ua feem ntawmntsuab silicon carbide micropowder tau nce siab heev. "Hav, nws yog amazing!" Tus thawj coj ntawm lub rooj cob qhia tom qab hais tias, "Thaum cov khoom tshiab tau muab tso rau hauv, cov hlau molten ntws los ntawm, sab channel tau pom tseeb 'gnawed', tus nqi hlau ntws tig rov qab, thiab tus naj npawb ntawm cov sij hawm kho tau raug txo los ntawm ntau dua ib nrab, thiab cov nyiaj txuag tau tag nrho cov nyiaj tiag!" Qhov toughness no yog lub hauv paus rau lub neej ntev ntawm cov khoom siv kub kub.
Txhim kho cov hluav taws xob hluav taws xob thiab teeb tsa "lub dab dej kub" ntawm cov khoom siv: Cov khoom siv hluav taws xob ntau dua qhov kub thiab txias, qhov zoo dua! Rau qhov chaw xws li coke qhov cub qhov rooj thiab txhuas electrolytic cell sab phab ntsa, cov khoom nws tus kheej yuav tsum tau ceev nrooj ua cua sov kom tsis txhob muaj qhov kub thiab txias hauv zos los ntawm kev kub siab thiab puas. Lub thermal conductivity ntawm ntsuab silicon carbide micropowder yog ib qho "tus menyuam kawm ntawv zoo" ntawm cov ntaub ntawv tsis yog xim hlau (chav tsev kub thermal conductivity coefficient tuaj yeem ncav cuag ntau dua 125 W / m·K, uas yog kaum ob npaug ntawm cov av nplaum zoo tib yam). Ntxiv rau cov khoom siv refractory nyob rau hauv ib feem yog zoo li embedding ib tug npaum "kub yeeb nkab" rau hauv cov khoom, uas muaj peev xwm ua tau kom lub zuag qhia tag nrho thermal conductivity, pab lub tshav kub kom sai thiab sib npaug dissipated, thiab zam lub zos overheating thiab tev los yog puas los ntawm "mob siab".
Txhim kho thermal poob siab tsis kam thiab txhim kho lub peev xwm "nyob twj ywm nyob rau hauv lub ntsej muag ntawm kev hloov": Ib qho ntawm cov teeb meem "killers" ntawm cov ntaub ntawv refractory yog ceev txias thiab cua sov. Lub tshuab hluav taws xob tau qhib thiab kaw, thiab qhov kub thiab txias hloov mus rau qhov hnyav, thiab cov khoom siv yooj yim yooj yim rau "tawg" thiab tev tawm.Ntsuab silicon carbidemicropowder muaj ib qho me me thermal expansion coefficient thiab ceev thermal conductivity, uas tuaj yeem sib npaug qhov kev ntxhov siab los ntawm qhov kub thiab txias. Kev taw qhia nws rau hauv qhov system refractory tuaj yeem txhim kho cov khoom muaj peev xwm tiv thaiv qhov kub thiab txias hloov pauv, uas yog, "thermal shock resistance". Lub qhov cub lub qhov ncauj hlau castable ntawm cov cement rotary kiln yog raug rau qhov txias thiab kub shocks, thiab nws lub neej luv luv yog qhov teeb meem ntev. Ib tus kws tshaj lij kev tsim hluav taws xob tau hais rau kuv tias: "Txij li thaum siv cov khoom siv hluav taws xob muaj zog nrog cov xim ntsuab silicon carbide micropowder ua lub ntsiab sib sau thiab hmoov, cov nyhuv tau tshwm sim tam sim. kev siv zog!” Qhov "ceev siab" no yog los daws qhov nce thiab nqis hauv kev tsim khoom.
Vimntsuab silicon carbide micropowder combines lub zog siab, siab thermal conductivity, zoo heev thermal poob siab tsis kam, thiab muaj zog yaig kuj, nws tau dhau los ua "sul mate" hauv kev tsim cov khoom siv refractory niaj hnub. Los ntawm blast furnaces, converters, hlau trenches, thiab torpedo tso tsheb hlau luam nyob rau hauv hlau thiab hlau metallurgy rau electrolytic hlwb nyob rau hauv nonferrous metallurgy; los ntawm qhov tseem ceeb ntawm cov cement kilns thiab iav kilns hauv kev lag luam cov ntaub ntawv hauv tsev mus rau cov corrosive kilns hauv kev lag luam tshuaj lom neeg, hluav taws xob hluav taws xob, thiab khib nyiab incineration, thiab txawm pouring khob thiab ntws steel bricks rau casting... Txawm qhov twg muaj kub, hnav, hloov tam sim ntawd, thiab yaig, lub micropowder ntsuab no yog active. Nws yog ntsiag to embedded nyob rau hauv txhua txhua refractory cib thiab txhua square ntawm castable, muab kev tiv thaiv zoo rau "lub plawv" ntawm kev lag luam - high-kub kilns.
Tau kawg, "kev cog qoob loo" ntawm ntsuab silicon carbide micropowder nws tus kheej tsis yooj yim. Los ntawm kev xaiv cov khoom siv raw, kev tswj xyuas meej ntawm cov txheej txheem ua kom sov smelting (kom purity thiab greenness), crushing, sib tsoo, pickling thiab impurity tshem tawm, hydraulic los yog airflow precision classification, kom nruj ntim raws li particle loj tis (los ntawm ob peb microns mus rau pua pua ntawm microns), txhua kauj ruam muaj feem xyuam rau kev ruaj khov ntawm cov khoom kawg. Hauv particular, purity, particle loj tis thiab particle zoo ntawm micropowder ncaj qha cuam tshuam nws dispersibility thiab cov nyhuv nyob rau hauv cov ntaub ntawv refractory. Nws tuaj yeem hais tau tias cov khoom lag luam zoo ntsuab silicon carbide micropowder yog nws tus kheej cov khoom ntawm kev sib xyaw ua ke ntawm kev siv tshuab thiab khoom siv tes ua.