Cov txheej txheem tsim khoom ntawm refractories

Raws li qhov densification thiab cov duab ntawm cov khoom, muaj sintering txoj kev, melting casting txoj kev thiab yaj txhaj tshuaj. Sintering txoj kev yog lub tuam tsev ntawm cov khoom siv raw khoom ua ntej kub hnyiab, crushing thiab tshuaj ntsuam, thiab tom qab ntawd tov nrog raw khoom raws li ib qho piv txwv, los ntawm kev sib sau, ziab thiab hlawv. Lub hom phiaj ntawm cov khoom siv raw ua ntej hlawv yog hlawv tawm cov dej, cov organic impurities thiab cov roj decomposed los ntawm sulfate, thiaj li yuav txo tau qhov kub ntawm shrinkage ntawm cov khoom thiab xyuas kom meej qhov tseeb ntawm cov duab thiab loj ntawm cov khoom. Cov khoom siv raw kuj yuav tsum tau soj ntsuam tom qab crushing thiab sib tsoo, thiab vim hais tias cov pob zeb yog graded los ntawm txawv particle ntau thiab tsawg, nws muaj peev xwm xyuas kom meej qhov ze packing thiab tau ib tug tuab billet.

Txhawm rau kom sib npaug ntawm cov khoom sib xyaw thiab cov khoom ntawm ntau yam khoom siv raw thiab clinker, nws yog ib qho tsim nyog yuav tsum ua kom sib xyaw thiab ntxiv cov ntawv khi rau tib lub sijhawm txhawm rau txhim kho lub zog sib txuas ntawm lub pob zeb. Piv txwv li, aluminium silicate billet yog ntxiv rau cov av nplaum nplaum, magnesium billet yog ntxiv rau sulfite pulp pov tseg, thiab silica billet ntxiv rau txiv qaub mis. Raws li tus nqi ntawm cov dej ntsiab lus ntawm billet, semi-qhuav molding (kwv yees li 5% dej ntsiab lus), yas molding (kwv yees li 15% dej ntsiab lus) thiab grouting molding (kwv yees li 40% dej ntsiab lus) yuav siv tau. Nws yog ces qhuav thiab hlawv. Txoj kev fusion casting yog yaj cov ntaub ntawv raw los ntawm cov txheej txheem ntawm kev sib xyaw thiab kev sib tsoo zoo, yaj ntawm qhov kub thiab txias, ncaj qha casting, txias crystallization, annealing rau hauv cov khoom. Xws li fused cam khwb cia mullite cib, corundum cib thiab magnesia cib. Lawv lub cev compact, siab mechanical zog, siab kub structural zog, zoo slag tsis kam, Scope ntawm kev siv yog tas li expanding. Melt txhaj tshuaj yog txoj kev ntawm melting cov khoom xyaw, tshuab nrog siab siab cua los yog superheated chav, thiaj li hais tias nws yog dispersed mus rau hauv fibers los yog hollow pob. Cov khoom siv tsuas yog siv los ua lub teeb hluav taws xob tiv thaiv, cov ntaub ntawv rwb thaiv tsev kub. Tsis tas li ntawd, nws tseem tuaj yeem ua cov hmoov lossis granular amorphous refractory cov ntaub ntawv, uas yog sib txuas nrog tar, asphalt, cement, phosphate, sulfate lossis chloride ntsev thiab siv ncaj qha yam tsis muaj kev sib sau thiab sintering.