Tabular aluminayog ntshiab, tag nrho sintered alumina tsis muaj additives. Cov ntaub ntawv refractory los yog castables ua los ntawm tabular corundum alumina pom zoo thermal shock tsis kam thiab flexural zog tom qab siab -kub kev kho mob. Fused alumina, feem ntau siv rau hauv cov ntaub ntawv refractory, feem ntau yog dawb los yog xim av alumina. Nws yog tsim los ntawm melting alumina los yog bauxite. Qhov sib txawv ntawm sintered tabular corundum thiab fused alumina yog:
1. Sintered tabular alumina muaj cov ntsiab lus tsis zoo thiab tsis sib xws, thaum fused alumina muaj cov ntsiab lus siab thiab tsis sib npaug. Sintered tabular corundum alumina siv siab -purity industrial alumina li raw khoom, thiab tsis muaj additives ntxiv thaum lub sij hawm tsim khoom. Tsuas yog qee qhov me me ntawm cov tshuab hlau nkag thaum lub sij hawm crushing (uas tuaj yeem raug tshem tawm los ntawm kev sib nqus sib nqus), lwm yam impurities xws li hlau, silicon, thiab sodium muaj nyob rau hauv cov kab. Fused alumina yuav tsum tau ntxiv cov hlau thiab carbon raws li cov khoom siv thaum lub sij hawm tsim khoom, ua rau muaj ntau dua cov ntsiab lus ntawm impurities xws li hlau, carbon, silicon, thiab sodium piv rau sintered tabular corundum alumina. Lub caij no, vim qhov tsis sib xws ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov alumina molten thaum lub sij hawm fusion, cov ntsiab lus impurity sib txawv hauv ntau qhov chaw. Yog li ntawd, fused alumina yuav tsum nruj xaiv, thaum sintered tabular alumina tsis.
Thib ob, sintered tabular corundum alumina nthuav tawm cov thermal shock thiab spilling tsis kam piv rau fused alumina. Sintered tabular alumina qhov zoo dua thermal poob siab thiab spilling tsis kam stems los ntawm nws ntau kaw pores. Cov kheej kheej kaw qhov pores zoo tiv thaiv thermal shock thiab tiv thaiv kev tawg tawm. Hauv qhov sib piv, fused alumina muaj qhov qhib qhov pores ntau dua thiab tsawg dua qhov pores kaw, thiab nws cov txheej txheem ua kom txias qeeb ua rau muaj cov pob zeb loj dua. Cov crystals ib leeg no tsim microcracks thaum lub sij hawm tawg, yog li txo nws cov thermal shock thiab spalling kuj.
Thib peb, cov txheej txheem tsim khoom ntawm sintered tabular corundum alumina yog lub zog ntau dua -ntau thiab ib puag ncig zoo dua li ntawm fused alumina. Fused alumina yog ib qho zoo-paub siab- zog- kev lag luam, yuav tsum tau 2300-3300 kWh ntawm hluav taws xob ib tuj, thaum sintered tabular corundum alumina siv tsuas yog ib - xya mus rau ib feem kaum ntawm tag nrho lub zog. Cov txheej txheem ntau lawm ntawm fused alumina generates ntau cov pa khib nyiab thiab slag, whereas sintered tabular alumina siv cov pa roj carbon monoxide los ua cov cua sov, ua kom tsis muaj cov pa khib nyiab lossis slag emissions dua li carbon dioxide los ntawm cov nkev.
