Phosphate siab alumina castables txawv ntawm lwm homrefractory castables. Txoj kev tshem tawm kev nthuav dav yog txhawm rau txhawm rau cov khoom siv.
Traping yog ib txoj hauv kev yooj yim thiab siv tau zoo. Thaum lub sij hawm tsim kho, thawj zaug ntxiv ib feem ntawm cov cement rau lub castable. Tom qab 10 xuab moos, do cov khoom dai kom sib npaug, ntxiv cov seem ntawm cov cement, thiab txuas ntxiv rau 1 teev. Nws tuaj yeem siv hauv ~ 2 min. (Txhua lub chaw tsim khoom yuav qhia txog qhov feem pua ntawm cov cement ntxiv hauv cov lus qhia rau kev siv. Qhov ntxiv ua ntej tuaj yeem yog 50% lossis 40%)
1. Cov txheej txheem los tshem tawm qhov tshwm sim nthuav dav ntawm phosphate castables
Phosphate refractory castables yuav tsum muab cia rau hauv tsev rau peb lub hlis. Thaum lub sij hawm peb lub hlis no, qhov kub thiab txias compressive zog ntawm lub siab alumina castables yog ruaj khov. Yog tias nws tshaj peb, lub zog yuav txo qis. Sim tsis txhob khaws cia sab nraum zoov, vim tias lub zog ntawm phosphate castables khaws cia hauv tsev tom qab ci yuav yog li 10Mpa siab dua li cov castables khaws cia hauv tsev. Kev cia sab nraum zoov yuav raug cuam tshuam los ntawm lub voj voog qhuav-ntub vim qhov hloov pauv ntawm lub caij ntuj sov lossis huab cua txias. , uas txo cov kev ua haujlwm ntawm phosphate castables.
Thaum cov khoom siv cuab yeej, thawj qhov sib xyaw ua ke, tom qab ntawd hmoov, tom qab ntawd ntxiv li 40% ntawm cov cement thiab sib tov sib npaug. Qhov chaw ntxiab yuav tsum tau them nrog cov ntawv yas kom tiv thaiv cov cement ntawm evaporating; Thaum lub sij hawm lub cuab yeej, dej tsis tuaj yeem nkag mus rau hauv castable. Cia nws sawv ntsug rau ntau tshaj 10 teev saum toj no 15 degree, tso cai rau cov cement kom hnov mob nrog cov hlau nyob rau hauv refractory aggregate thiab hmoov tso tawm hydrogen. Nws tuaj yeem tshem tawm qhov tshwm sim nthuav dav thaum siv.
2. Kev ceev faj rau phosphate refractory castables
Dab tsi yuav tsum tau muab sau tseg txog phosphate siab alumina castables yog tias cov ntaub ntawv raw siv tsis tuaj yeem muaj ntau dhau impurities. Cov impurities muaj hlau, potassium, thiab sodium. Ntau cov hlau, potassium, thiab sodium ntau dhau yuav cuam tshuam rau lub neej kev pabcuam ntawm cov castables.
Tsis tas li ntawd, tus nqi ntawm cov cement yuav tsum tsis txhob ntau dhau. Kev nrawm nrawm dhau, nrawm dhau lossis qeeb dhau, yuav cuam tshuam rau lub zog ntawm kev siv tom qab. Kev saib xyuas tshwj xeeb yuav tsum tau them rau phosphate castables uas lawv yuav tsum tsis txhob cuam tshuam los ntawm noo noo. Deliquescent castables tsis tuaj yeem rov siv dua. Tsis tsuas yog lawv yuav tsis condense thaum lub sij hawm tsim kho, tab sis lawv kuj yuav tsis muaj zog nyob rau hauv tag nrho cov nyob rau theem tom ntej.
Thaum khaws cov phosphate refractory castables, lawv tsis tuaj yeem khaws cia hauv qhov kub thiab txias. Dawb crystals yuav precipitate rau saum npoo ntawm cov castables khaws cia ntawm qhov kub thiab txias. Cov castable yuav muaj plaub hau dawb los yog ua hmoov. Yog li ntawd, cov qauv sab hauv ntawm lub castable yog xoob thiab lub zog compressive raug txo.
Yog li ntawd, phosphate castables yuav tsum tau daig ua ntej siv.
