Kev txhaj tshuaj pwm yog siv nyob rau hauv kev tsim khoom ntawm ntau yam khoom, raws li yog qhov kev lag luam refractory cib. Nws tuaj yeem ua cov cib ua kom zoo dua qub thiab muaj ntau qhov qauv qauv. Txawm li cas los xij, ib qho teeb meem nrog pwm yuav tseem nqa ib co cawv rau hauv kev tsim tawm. Cov pwm tsim muaj qhov tseem ceeb rau qhov zoo ntawm lub ntsej muag refractory cib lub cev. Yog tias pwm muaj teeb meem, cov txiaj ntsig hauv qab no yuav tsim.
Thaum txhim kho lub pwm ntawm cov xovxwm, nco ntsoov khaws cov kab nruab nrab ntawm lub siab lub taub hau, pwm kab noj hniav thiab lub qhov hluav taws xob kom zoo ib yam. Yog tias nws tsis sib tshooj, nws yuav cuam tshuam rau qhov zoo ntawm cov pob zeb refractory, ua cov kab nrib pleb thiab tseem ua rau cov khoom siv tsis zoo. Thaum lub siab tawv tsis sib thooj, yuav muaj" nkees pits" thiab" yoj sib zog" nyob rau saum npoo ntawm cov pwm, uas ua rau tawg ntawm lub cib dawb thaum lub sijhawm cib txheej txheem.
Tus tuag teev tus nqi, taper thiab loj sib txawv ncaj qha cuam tshuam cov tsos ntawm lub cev dawb paug. Puas tuaj yeem ua cov ntsiab lus ntawm cov kev pabcuam subscribed? Lub smoothness ntawm pwm yuav cuam tshuam rau lub siab lwj thaum lub sij hawm nias molding thiab lub zog ntawm cov cib sab saum toj thaum lub pob zeb tso tawm. Vim tias qhov siab dhau ntawm qhov txawv ntawm qhov siab ntawm lub cib thaum cov pa luam tawm, qhov sib txawv ntawm qhov ntim ntim tau yooj yim. Vim tias cov npoo ntawm lub cev ntsuab yuav raug txhuam nrog thaum cov cib tso tawm, cov npoo hauv qab yog qhov cuam tshuam. Thaum txhuam thiab nrawm dhau lawm, lub pob zeb refractory tawg yooj yim.
Thaum muaj qhov sib txawv nruab nrab ntawm cov pwm thiab pwm ncej, ntau txheej txheem deformation yuav tshwm sim thaum lub sijhawm ua pa thiab depressurization, uas ua rau muaj kev tawm tsam ntev los yog sib cais ntawm lub cib. Cov nplaum rau hauv qab phaj yuav muaj qhov tsis zoo xws li pitting. Yog tias qhov chaw ntawm nruab nrab hauv qab phaj, pwm npog thiab pwm ntsa phab ntsa loj dhau, lub cib ntsa yuav muaj flash. Hauv kev luv luv, yog tias refractory cib pwm pwm puas lawm, nws yuav muaj qhov cuam tshuam zoo ntawm tsab xov xwm moulded, yog li ntawd cov pwm lub luag haujlwm tseem ceeb hauv kev tsim khoom.
