Thaum Lub Yim Hli, 25 tons refractory castables tau ntim khoom xa tuaj rau peb cov neeg siv khoom hauv South Africa.
Cov txheej txheem molding ntawm refractory ntom castables yog: kev co molding, ramming molding, yas molding, grouting molding, kub nias molding.
Feem ntau, qhov kev faib ua feem ntawm refractory ntom castables tsim los ntawm kev co yog qhov loj, thiab tsis muaj ntau yog siv rau grouting thiab kub nias. Vibration molding yog siv lub vibrating pas nrig kom vibrate ntawm cov pwm thiab cov castable kom cov castable hais muaj floating fluidity los sau tag nrho cov seem ntawm cov pwm. Nyob rau tib lub sijhawm, cov khoom me me kuj tseem tuaj yeem ntim rau hauv qhov khoob ntawm cov khoom loj kom ua rau cov khoom siv refractory ntom castables ntau ntom.
Qhov zoo ntawm kev vibration molding yog kev siv zog tsawg thiab tus nqi qis. Nws yog haum rau loj lossis phaj-zoo li lub cev tsis zoo. Qhov tsis zoo yog vim qhov sib txawv ntawm qhov sib txawv ntawm cov hlau phaj thiab cov pwm ntawm cov pwm, tshwj xeeb tshaj yog cov phaj loj-zoo li lub cev tsis zoo muaj qhov tsis sib xws, thiab thaum qhov kev tsim kho tau rov pib dua, yuav muaj qhov tsis sib xws. Tsis tas li ntawd, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhuam, nws yuav tsum ua kom cov molding ceev, lub siab vibration kuj tuaj yeem siv los ua kom lub zog thaum vibrating.
Ramming molding yog ib txoj kev molding uas cov khoom ramming yog compacted nrog ib tug rammer kom tau ib co degree ntawm compactness. Lub ramming rauj yog tsav los ntawm pneumatic lossis hluav taws xob tsav, thiab nws tuaj yeem raug rammed manually. Cov khoom siv ramming yog ntxiv rau hauv cov qauv txheej los ntawm txheej thiab tom qab ntawd rammed hauv txheej. Ua ntej txhua qhov pub mis, qhov saum npoo ntawm cov khoom tamped kawg yuav tsum tau xoob kom tsis txhob sib cais lossis tawg ntawm cov txheej. Tab sis txoj kev no yog siv zog heev thiab nrov heev.
Yas molding yog ib txoj kev molding uas cov ntaub ntawv yas muab tso rau hauv pwm thiab extruded. Nws yog extruded rau hauv cov av nkos nrog cov av nkos extruder, thiab tom qab ntawd cov av nkos raug txiav rau hauv qhov khoob ntawm qhov hluav taws xob ntawm qhov xav tau. Nws yog ces qhuav thiab raug rho tawm haujlwm. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau lub cev ntsuab, cov khoom siv lub tshuab nqus tsev yog siv los ua kom yooj yim tshem tawm cov av nkos.
Grouting yog txhaj cov hmoov suspension rau hauv gypsum pwm, thiab tom qab gypsum pwm absorbs dej, cov slurry solidifies kom tau ib lub cev ntsuab. Tom qab ntawd ncuav tawm cov av nkos uas tsis muaj dej nyob hauv nruab nrab. Grouting kuj muaj xws li siab grouting, centrifugal grouting thiab nqus grouting. Siab grouting yog siv lub ntiajteb txawj nqus los yog compressed cua kom luv lub sij hawm nqus thiab txo cov dej noo nyob rau hauv lub slurry dawb paug tom qab demolding. Centrifugal grouting yog txhaj cov slurry rau hauv pwm thaum tig, thiab centrifugal grouting yuav ua rau cov khoom nyob ze rau ntawm phab ntsa pwm. Nyob rau hauv txoj kev no, lub thickness ntawm lub cev ntsuab yog uniform, nws tsis yooj yim rau deform, thiab muaj dej tsawg. Nqus grouting yog tshem tawm cov qauv sab nraud. Txoj kev no muaj cov nyhuv nqus dej sai thiab tuaj yeem txhim kho qhov zoo ntawm lub cev ntsuab.
Kub nias yog tsis tshua muaj siv nyob rau hauv refractory ntom castables, feem ntau nyob rau hauv lub ceramic kev lag luam.
Nyob rau hauv luv luv, tsis muaj teeb meem dab tsi txoj kev molding yog, nws nyob ntawm cov khoom sib txawv ntawm cov refractory ntom castables.
