Refractory castables (tseem hu ua cov pob zeb ua kom khov) zoo ib yam hauv lawv cov ntaub ntawv, cov khoom siv thiab cov khoom siv. Txoj kev tsim kho ntawm ntau hom roj hmab, xws li Portland cement refractory castables, aluminate refractory castables, dej iav thiab phosphoric acid (los yog phosphate) refractory castables, muaj li nram no.
Npaj ntawm cov yeeb ncuab castable ua ntej kev tsim kho
(1) Kev npaj ntawm cov ntaub ntawv raw: Lub pob zeb ua tiav ntawm cov khoom siv yuav tsum tau mus rau qhov kev kuaj xyuas tsim nyog ua ntej kev tsim kho, thiab lees paub tias lawv ua tau raws li qhov qauv tsim ua ntej lawv muab tso rau.
(2) Kev txiav txim siab ntawm qhov sib xyaw ua ke: Cov khoom siv sib xyaw ua kom tiav yog feem ntau yog tsim raws li cov sib xyaw thiab cov cai teev hauv cov lus qhia ua los ntawm cov khw.
(3) Kev teeb tsa ntawm lub qauv: Lub qauv rau kev tsim kho ntawm cov yeeb ncuab castable yuav tsum raug xaiv raws li cov qauv ntawm cov qauv kev lag luam thiab tus nqi ntawm kev tsim vaj tsev. Cov hom qauv yog: ruaj, dai thiab cuab tam. Cov khoom siv template feem ntau yog cov hlau pwm thiab ntoo ntoo.
Thaum lub template txhawb, yuav tsum tau ua raws li hauv qab no:
1) Ua kom zoo thiab raws li tsim cov cai tswj tsim.
2) Qhov kev txhawb nqa yog khov kho, kev sib koom ua ke ua ke yooj yim rau kev tsim, cov pob qij txha nruj thiab lub slurry tsis leaking.
3) Rau cov khoom siv khoob khiab thiab cohesive refractory, ib qho thaiv txheej yuav tsum muaj nyob hauv daim form.
4) Cov pob zeb ntoo rau lub pob yas qoob loo yuav tsum ruaj khov kho kom tsis txhob tawm mus thaum muaj kev sib ntswg.
5) Template yuav tsum muab cov roj npog pov thaiv ua ntej tsim kho kom tsis txhob ua kom khaus.
(4) Kev tsim thiab kev txhim kho kev ruaj ntseg: Cov nkoj siv feem ntau muab faib ua hlau thiab tsis-hlau. Ib qho kawg ntawm lub thauj tog rau nkoj yog welded rau lub plhaub kiln los yog cov hlau ncej uas txhawb nqa, thiab tau muab tso rau hauv cov hluav taws xob castable los txhawb thiab kev sib txuas cov nyhuv.
Qhov chaw ntawm cov yas castable castable yuav tsum yog raws li cov cai tswj tsim. Hlau thauj tog rau nkoj feem ntau siv hauv qhov chaw tsis tshua muaj qhov kub, thiab cov khoom siv hlau zas paj (ceramic anchor bricks) siv hauv qhov chaw siab.
Cov hlau tuav cov ntaub ntawv sib txawv raws li ntau qhov chaw hauv cov cua sov, thiab cov hlau cov phab ntsa hauv cov cua sov thiab lub dome muaj V daim duab, L puab, Y cov duab thiab cov zoo li.
Feem ntau, qhov kawg ntawm lub hlau thauj tog hlau yog faus rau ntawm 2/3 ntawm lub thickness ntawm lub cub tawg; cov hlau ciav hlau muaj feem ntau nyob rau ntawm qhov cua kub.
Qhov nruab nrab ntawm cov hlau txuas ntawm cov hlau khov ntawm qhov thickness thiab qhov siab ntawm lub tshuab ua kom sov. Feem ntau, txoj kab rov tav pib yog li 550 ~ 600mm, thiab txoj kab sib ntsug yog 450 ~ 500 hli.
Thaum siv cov hlua khi coj los siv, txoj hlua ntawm sab phab ntsa feem ntau yog 300 txog 500 hli, thiab sab saum toj ntawm qhov cub taws yog txog li 200 txog 300 hli.
Kev tsim kho ntawm cov khoom xyaw uas tsis muaj zog
Txoj kev tsim kho mob yog:
(1) Xaiv thiab nruab ib los yog ntau qhov yuam kom ua raws li kev tsim kho qhov tsim nyog rau qhov project. Lub tshuab yuav tsum ceev kom huv thiab cov tshuab cav nyob rau hauv qhov chaw yuav tsum tau siv tom qab dhau txoj kev xeem.
(2) Kev tsim kho lub tsev yuav tsum tau muab ntxuav ua ntej, yog tias tsim nyog, nrog dej los yog cov huab cua.
(3) Lub qhov khi hlua nrog cov twj siv twj ywm yuav tsum xyuas qhov chaw thiab qhov chaw ntawm lub rooj hlau hlau thaiv ntawm cov hlau khij nyiab los yog khib nyiab txhuam.
(4) Tshawb xyuas qhov loj me, ruaj khov thiab seam ntawm lub rooj sib koom tes ua qauv.
Hloov ntawm cov khoom siv hluav taws xob
Kev khib nyiab yog nqa nrog cov chaw tsim khoom cov khoom siv qhia thaum lub sijhawm nplawm.
Pouring thiab vibrating
Lub casting ntawm refractory castables yuav tsum stratified los ntawm vibrating tshuab cuab yeej. Lub vibrating tshuab yuav tsum siv lub vibrating qws los yog ib tug vibrator ca. Kev siv voj voog tsuas siv tau tshwj xeeb.
Thaum muab cov vibrating qws, qhov tuab ntawm txheej casting yuav tsum tsis pub tshaj 1.25 npaug ntawm qhov ntev ntawm tus vibrating qws. Thaum siv lub vibrator tiaj, qhov yuav tsum tsis pub tshaj 200 hli.
Lub castable feem ntau yuav tsum tujtaws poured. Ua ntej thawj txheej ntawm castable yog pib teem, tom ntej txheej ntawm castable yuav tsum tau poured. Yog tias qhov sib txawv hauv kev tsim dua tshaj li qhov pib lub sijhawm, nws yuav tsum tau ua raws li qhov yuav tsum ua ntawm kev tsim kho sib koom ua ke.
Txij nkawm thiab tsis ua haujlwm
Vim ntau ntau hom thiab hom roj hmab tsis zoo, kev kho lub sijhawm thiab lub chaw tu vaj tu tsev yuav tsum sib txawv. Feem ntau siv cov cuab yeej hluav taws xob kho hluav taws xob tuaj yeem siv tau rau Daim Ntawv Tsho 4-6
5 ntsiab lus hais txog kev tsim kho hluav taws xob
Kev saib xyuas zoo.
Cov kev ceev faj txog kev txij nkawm ntawm silicate refractory castables yog:
1) Silicate refractory casting 枓 yog tsim los rau dej thiab kho kom zoo, yog li ntawd cov cement nyob rau hauv cov khoom ua rau lub cev qhuav dej thiab hardening lub sij hawm co. Kev tswj ntawm kev sib tw ntawm alumina nplaum cement yog qhov tseem ceeb vim qhov cement coation nyob rau hauv high alumina cement castables yog kho kom zoo, thiab exothermic cov tshuaj tiv thaiv ntawm cov me nyuam loj yog tsim, uas yooj yim ua rau tawg.
2) Txhuam hniav yuav tsum tau them thiab dej tau tom qab pib lub qhov nrig ntawm lub castable. Cov sij hawm ntawm cov dej yuav tsum yog txaus kom lub castable nyob rau hauv txaus noo noo.
3) Cov cua sov ntawm Portland cement refractory castable rau chav curing yuav tsum yog 10 ~ 15 ° C / h, qhov siab tshaj plaws yuav tsis pub tshaj 20 ° C / h; tus nqi txias yuav tsum tsis pub tshaj 40 ° C / h.
Cov kev ceev faj txog kev txij nkawm ntawm cov dej iav castables yog:
Lub zog nce ntawm dej iav castable yog tsim thaum lub cev qhuav dej ntawm silica gel. Yog li ntawd, nws yuav tsum tau ceev cia nyob rau hauv ib cheeb tsam qhuav, thiab yuav tsum tsis txhob tsum tau watered rau txij nkawm.
Cov kev ceev faj txog kev txij nkawm ntawm phosphoric acid refractory castables yog:
1) Phosphoric acid refractory castable yuav tsum tsis txhob kho nrog dej los yog ua pa, tiam sis yuav tsum kho kom zoo hauv qhov chaw qhuav.
2) Yog tias qhov kub thiab txias kub tsis txias, ces yuav tsum tau kub kom qhuav tom qab nchuav.
U) Yuav tsum ceev faj txog kev ua tsis ncaj. Kev ceev faj txog cov lus hais yog:
1) Yog tsis muaj cov ntaub ntawv pov thawj, nws yuav tsum tau muab tshem tawm thaum lub zog ntawm cov ntaub ntawv castable yuav xyuas kom meej tias qhov saum npoo thiab cov npoo tsis raug puas los ntawm demolding.
2) Daim qauv ua cov ntawv pov thawj yuav tsum tau muab tshem tawm thaum lub castable ncav 70% lub zog.
