Refractories Rau iav rauv

Lub ntsiab thermal khoom ntawm iav ntau lawm, xws li fusing ntom, ob peb zawj, pub channel thiab annealing ceev, yog tsim los ntawm cov ntaub ntawv refractory.tnws cov kev pabcuam kev ua haujlwm thiab kev pabcuam lub neej ntawm cov khoom siv thiab qhov zoo ntawm cov iav feem ntau nyob ntawm seb hom thiab qhov zoo ntawm cov refractories siv.tnws kev nce qib ntawm cov tshuab tsim khoom yog nyob ntawm kev txhim kho ntawm refractory manufacturing technology thiab zoo mus rau qhov zoo. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum xaiv thiab uait yog ib qho tseem ceeb heev rau kev siv refractories hauv kev tsim thiab kev ua haujlwm txhua hnub ntawm cov khoom siv iav thermaltnws thib ob yog cov kev pab cuam thiab corrosion mechanism ntawm ntau qhov chaw ntawm thermal khoomfire cov ntaub ntawv xa mus rau inorganic nonmetallic cov ntaub ntawv los yog cov khoom uas muaj hluav taws kub tsis tsawg tshaj li 1500 ℃ (1580 ℃ nyob rau hauv Tuam Tshoj thiab lub qub Soviet Union)it tuaj yeem yog cov khoom siv raw, kuj tuaj yeem yog cov khoom tsim thiab cov khoom siv, refractories ntxiv rau qee qhov kev tiv thaiv hluav taws, tab sis kuj yuav tsum muaj peev xwm ua tau.

Lub ntsiab kev ua tau zoo ntawm qhov system:

① Yuav kom ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm kub, nws yuav tsum tsis txhob muag thiab yaj ntawm qhov kub txaus;

② Nws tuaj yeem dais lub qhov cub thiab qhov kev ntxhov siab hauv cov txheej txheem ntawm kev ua haujlwm, thiab dais qhov tsis zoo ntawm qhov kub thiab txias.;

Tsis muaj qhov poob ntawm lub zog ntawm cov qauv, deformation thiab tsis ua haujlwm;

③ Qhov kub siab ntim ruaj khov tsis tuaj yeem tsim cov duab ntxoov ntxoo ntau dhau los yog shrinkage, ntom rauv masonry los yog pouring lub cev yuav tsis ntsws vim ntim expansionexising tawg los yog tawg;

④ Lub thermal poob siab tsis ua txhaum nyob rau hauv qee qhov kub hloov pauv thiab thermal shock;

⑤ Kev tiv thaiv kev ntxeem tau tuaj yeem tiv taus qhov kev ua haujlwm ntev ntawm cov pa roj, kua thiab khoom corrosive nruab nrab yam tsis muaj kev yaig sai, thiab tuaj yeem tiv taus corrosion.oxidation txo ntawm qhov kub thiab txiasittuaj yeem tiv taus qhov kub thiab txias thiab kub ceev ntws nplaim hluav taws thiab cov pa luam yeeb, qhov yaig ntawm cov kua hlau thiab slag, nrog rau kev poob siab.impact sib tsoo ntawm cov hlau thiab lwm yam ntaub ntawv;

② Kev ntsuas thermal ntawm thermal tsis kam thiab cov khoom seem seem yog hais txog qhov tawg thiab kev sim poob ntawm lub cev cib los ntawm qhov kub thiab txias. Qauv.

Kev poob yog hais txog qhov tseeb tias cov yaj ntawm cov refractories yuav nkag mus rau hauv lub cib raws nws qhov hws thiab cov kab tawg, thiab cuam tshuam nrog nws los tsim cov qauv zoo ib yam li tus thawj..

Thaum qhov kub thiab txias hloov pauv, cov txheej txheem metamorphic nrog cov qauv cib sib txawv thiab cov khoom yuav tawg thiab poob.

Kev lag luam iav yog qhov tshwj xeeb hauv qhov eroded ib feem ntawm lub khob ntom ntom ntom ntom ntawm lub cev yuav nyob hauv cov iav kua yog tias nws tuaj yeem yaj tag..

Hauv iav, cov iav muaj pes tsawg leeg tsuas yog cuam tshuam rau ib qho me me, uas tsis muaj teeb meem rau ib khob, tab sis tsis yog rau qee lub iav tshwj xeeb..

Xu: yog tias nws tsis tuaj yeem yaj tag nrho, cov iav tsis xws li pob zeb, nodules thiab npuas yuav tsim, ua rau cov khoom pov tseg. Lwm sab.

Tam sim no, kev pab cuam lub neej ntawm Tuam Tshoj tus loj-scale ntab iav tau mus txog 50 xyoo.

Ntau tshaj 8 xyoo, tab sis tseem muaj qhov sib txawv loj piv nrog cov teb chaws uas muaj kev lag luam iav tsim. Yog li ntawd, qhov zoo ntawm refractory yog tus yuam sij rau qhov zoo ntawm iav.

Cov yam tseem ceeb ntawm kev tsim kho kev lag luam

Cov yam ntxwv ntawm refractories rau iav rauv

Refractories yog ib pab pawg ntawm multiphase thiab multicomponent complex systems, uas yog tsim los ntawm ntau yam sib txawv tshuaj muaj pes tsawg leeg thiab minerals nrog txawv qauv.

Plastid. Cov khoom ntawm refractories yog ze ze rau lawv cov tshuaj muaj pes tsawg leeg, theem muaj pes tsawg leeg, sib txuas morphology thiab kev faib tawm, nrog rau cov yam ntxwv ntawm txhua theem.

tshuaj muaj pes tsawg leeg

Cov tshuaj muaj pes tsawg leeg ntawm refractories yog ib qho ntawm cov yam ntxwv tseem ceeb uas txiav txim siab cov khoom ntawm refractories.Cov tshuaj muaj pes tsawg leeg ntawm refractories tuaj yeem muab faib ua ob ntu raws li qhov muaj pes tsawg leeg thiab kev ua haujlwm: lub ntsiab lus tseem ceeb uas suav nrog ntau npaum li cas thiab ua haujlwm txiav txim siab. lub luag haujlwm hauv nws qhov kev ua tau zoo, thiab cov khoom me me uas tso nyiaj rau ib qho me me yog hu ua cov khoom thib ob. Cov khoom thib ob suav nrog cov impurity tivthaiv nrog cov khoom siv raw thiab cov khoom siv ntxiv tshwj xeeb ntxiv kom ua tiav ib lub hom phiaj.

(1) Lub hauv paus ntsiab lus tseem ceeb yog cov khoom siv hluav taws xob ntawm lub sijhawm hluav taws xob hauv cov khoom siv hluav taws xob, uas feem ntau yog ib lossis ob peb hom siab melting ignition oxides lossis cov tsis muaj oxides tsim los ntawm cov ntxhia sib xyaw. Nws qhov kev ua tau zoo thiab qhov ntau ncaj qha txiav txim siab cov khoom ntawm cov khoom siv hluav taws xob lub sijhawm. Lub sijhawm hluav taws kub cov ntaub ntawv tuaj yeem muab faib ua kua qaub, alkaline thiab nruab nrab raws li lawv cov khoom siv tshuaj.

(2) Cov impurity tivthaiv yog hais txog cov khoom siv refractory uas tau coj los yog sib xyaw rau hauv cov txheej txheem tsim khoom vim yog siv cov khoom siv ntxhia ntuj.

Feem ntau hais lus, Ko, Nao, FeO thiab FeO yog cov khoom siv hluav taws kub

Cov teeb meem impurities hauv cov khoom. Tsis tas li ntawd, cov kua qaub oxide (ro2) thiab cov kua qaub oxide hauv cov khoom siv pyrotechnic (RO yog cov khoom tseem ceeb) kuj nce ntxiv.

Cov oxides hauv cov ntaub ntawv pyrotechnic suav tias yog cov khoom tsis zoo, uas muaj kev daws teeb meem ntawm qhov kub thiab txias. Cov nyhuv tsis pom tseeb

Tsuas yog qhov kev tsim kub ntawm eutectic kua theem txo qis thiab tus nqi ntawm cov kua theem nce, thiab nrog rau qhov kub thiab txias, tus nqi ntawm cov kua theem txo.

Qhov nce ceev yog nrawm, uas cuam tshuam rau qhov kub siab ua haujlwm ntawm cov khoom siv refractory. Yog li ntawd, nws yog ib qho tsim nyog los tswj cov impurity muaj pes tsawg leeg kom tsawg li sai tau

Piv txwv li, cov khoom tseem ceeb ntawm silica cib yog SiO, thiab cov khoom tsis zoo muaj xws li Ao, rau thiab alkali hlau oxides. American Standard

Nws yuav tsum tau hais tias tag nrho cov ntsiab lus ntawm impurities nyob rau hauv tshwj xeeb qib silicon breaker yog tsawg tshaj li 0.5%, thiab cov ntsiab lus ntawm Ao nyob rau hauv British standard silicon breaker yog 0.3%.

Muaj ob hom fluxing los ntawm impurities hauv refractories nrog cov ntsiab lus ntawm a1o tsawg dua 0.6%

(1)Vim muaj tshuaj lom neeg cov tshuaj tiv thaiv, tsis tshua muaj melting kua theem yog tsim;(2)Cov kua theem tsim nyob rau tib qhov kub thiab txias tsis tas melting tsawglarge ntau.

(3) Txhawm rau txhim kho lub cev kev ua haujlwm, kev ua haujlwm ntau lawm thiab kev ua haujlwm ntawm refractory, ntxiv cov tshuaj muaj pes tsawg leeg hauv kev tsim khoom lossis siv cov refractory.

Ib qho me me ntawm cov khoom ntxiv uas tuaj yeem ntxiv los txhim kho kev ua haujlwm ntawm cov khoom yog hu ua additive. Qhov ntau npaum ntawm cov additives txawv nrog lawv cov khoom thiab kev ua haujlwm, thiab feem ntau tsis tshua muaj.

Nws yog ob peb kaum txhiab rau ob peb feem pua ​​​​ntawm tag nrho cov khoom siv pyrotechnic. Additives tuaj yeem muab faib ua pawg hauv qab no raws li lawv lub hom phiaj thiab kev ua haujlwm:

(1)Lub sij hawm hluav taws kub cov ntaub ntawv aggregate binding kev ua tau zoo chav kawm: binder, tseem hu ua cementing tus neeg saib xyuas lossis sawv tus neeg sawv cev;(2)kho qhov chaw thiab hardening tus nqi chav kawm: nrog rau tus neeg sawv cev accelerating, polar tus neeg saib xyuas thiab hais txog;(3)hloov cov khoom rheological: suav nrog dej reducer, plasticizer, gelling agent thiab degumming agent, thiab lwm yam;(4)Kho cov koom haum sab hauv Cov qauv hauv chav kawm: suav nrog tus neeg sawv cev foaming, defoamer, shrinkable tus neeg sawv cev, tus neeg sawv cev o, thiab lwm yam.;(5)txhim kho cov chav kawm ua haujlwm ntev: suav nrog inhibitor, preservative, anti o tus neeg sawv cev, thiab lwm yam Cryoprotectants, thiab lwm yam; Txhim kho kev ua tau zoo, suav nrog kev pab cuam sintering, mineralizer, ceev kom qhuav tus neeg sawv cev, stabilizer, thiab lwm yam. Dej tsis kam; Antioxidant, tiv thaiv tus neeg sawv cev, thiab lwm yam.

Muaj ntau hom tshuaj ntxiv, uas yog cov khoom tshawb fawb tseem ceeb hauv kev lag luam hluav taws kub

Tsawg dua: 2. Nws tuaj yeem hloov pauv qee yam haujlwm lossis cov yam ntxwv ntawm cov khoom siv refractory; 3. Nws tsis muaj kev cuam tshuam loj rau cov khoom tseem ceeb ntawm cov khoom, xws li kev tsim cov silica bricks.

Qhov sib ntxiv ntawm txiv qaub mis nyuj thiab hlau yog mineralizer los pab tsim cov quartz; Cao ntxiv rau cov khoom yog stabilizer kom cov khoom ruaj khov.

Cov txiaj ntsig tau pom tias lub cubic ZrO 2 tsim los ntawm qhov kub thiab txias yog qhov ruaj khov ntawm qhov kub thiab txias: MgO thiab lwm yam khoom ntxiv hauv siab purity Al 2O ceramics yog sintering pab.high density sinter tuaj yeem tau txais ntawm qhov kub thiab txias.