Siv ntawm cov txheej txheem hauv cov npaus ua npuas ncauj ploj
Lub luag haujlwm ntawm cov txheej txheem ua npuas ncauj yog txhawb nqa cov khoom siv ua npuas dej, tswj hwm cov khoom siv ua npuas dej kom dhau los ntawm cov khoom siv ua npuas dej kom dhau, thiab ua kom cov pa roj ua kom huv si Yog li ntawd, kev siv cov khaub ncaws ploj tuaj yeem txo tau cov ua npuas dej, kom muaj kev tiv thaiv cov xuab zeb, ua kom muaj kev nkag siab ntawm cov xuab zeb, cov pa hluav taws xob txias, thiab cov pa roj carbon.
Yog li ntawd, cov txheej txheem ua npuas ncauj yuav tsum muaj cov khoom siv hluav taws xob kom ruaj khov, ua kom cov pa ua kom du, thiab tsis muaj tshuaj txhuam hniav, thiab tsis muaj pa tshuaj nrog ua npuas ncauj pwm.
Kev Ntsuam Xyuas Kev Ntsuas Ntawm Exendable Tuag Casting Txheej Txheem
Kev tsim kho cov txheej txheem ntawm cov txheej txheem ua npuas ncauj, txhim kho cov khoom siv hluav taws xob, thiab ua kom muaj kev tawm tsam cov pa hluav taws xob nrawm nrawm ntawm kev siv hluav taws xob nrawm ntawm kev siv pwm. Yog li vim li cas thiaj li tsim nyog tau tuag tuag casting txheej muaj ntau lub zog?
Feem ntau yog txheeb xyuas los ntawm rau qhov.
Cov txheej rau kev ploj tuag tuag casting muaj cov yam ntxwv hauv qab no:
(1) lub zog siab thiab ua kom pom tseeb, uas tuaj yeem tiv thaiv cov duab los ntawm kev ua txhaum thiab puas los ntawm cov xuab zeb qhuav thaum maub;
(2) Kev ua tau siab siab siab, uas tuaj yeem tiv thaiv cov xuab zeb los ntawm cov npoo ntawm qhov chaw ntawm lub cev ntas;
(3) huab cua zoo heev, uas tuaj yeem coj sai sai cov khoom siv nrog cov pa roj;
(4) Cov nplaum muaj zog, uas tuaj yeem tiv thaiv cov txheej los ntawm kev tawg lossis txawm ntog thaum lub sijhawm cov txheej txheem ntau lawm;
(5) Cov txheej txheej zoo heev thiab dai cov khoom, uas tuaj yeem thov cov txheej yooj yim ntawm ib qho tuab ntawm kev siv;
(6) Subining Zoo Tshaj Plaws thiab Tev cov khoom, tom qab pouring, ib lub plhaub txheej uas yooj yim rau cov xim kaw cia yog tsim, yog li tau txais lub ntsej muag nrog lub ntsej muag ci.
Tsib tus neeg ua haujlwm refracti feem ntau siv nyob rau hauv kev ploj tuag pov pov thawj nrog kev loj hlob ntawm kev ploj tuag casting, cov neeg tau them ntau dua thiab ntau dua rau kev ploj tuag pov thawj. Cov ntaub ntawv refractory yog cov khoom sib koom ua ke ntawm cov txheej txheem uas muaj sia.
Muaj ntau hom khoom siv refractory, thiab tsib feem nram no tau xaiv:
A. Zircon hmoov lub ntsiab yog ZRO2 thiab Sio2, piv txwv li zirconium orthoosilicate. Nws tau ua kom rov ua haujlwm siab dua thiab tam sim no tau siv los ua cov khoom siv los tiv thaiv cov khoom siv rau kev tuag. Cov khoom siv refractory feem ntau siv thaum ua cov hlau pov thiab hlau cas, uas tuaj yeem txo cov haujlwm ua haujlwm thiab tau txais cov khoom siv nrog cov duab ci.
b. Quartz hmoov lub ntsiab yog sio2. Vim tias quartz hmoov muaj txawv crystal hloov nyob rau hauv cov kub qhov kub, nws ua rau ntim hloov, muaj li txo nws cov nqi. Nws yog feem ntau siv los nrum me me thiab nruab nrab cam khwb cia hlau thiab tsis-freals xws li nrum aluminium thiab tooj. Txij li thaum siv tau tuag casting yog siv rau qhov me me thiab nruab nrab qhov nruab nrab, quartz hmoov tau dav siv.
c. Alumina alumina yog corundum hmoov, thiab nws lub ntsiab sib tivthaiv yog al2o3. Nws tseem yog cov khoom siv refractory nrog kev ua tau zoo thiab siv tau los pov cov hlau castings thiab hlau loj.
d. Graphite hmoov graphite hmoov yog ib qho ntawm cov khoom siv refractory feem ntau hauv cam khwb cia hlau ntau lawm. Nws tau ua siab ntev tab sis yog yooj yim oxidized. Nws cov cua sov nthuav tawm yog qhov tsawg heev, feem ntau tsis pub dhau 50 × {1}}.
e. Kyanite Kyanite muaj kev ua kom tiav dua 1800 degrees thiab kyanite maj mam hloov mus rau mullite ntawm qhov kub ntawm {1}} degrees. Mullite tseem nyob ruaj khov thaum 1800 degrees thiab decomposes rau hauv cornundum ntawm 1810 degrees. Kyanite yog tus nqi kim thiab yog ib qho ntxhia zoo tagnrho los hloov collundum.