Refractory Silica Cib

Silica xuab zeb
Nws yog cov khoom siv tseem ceeb tshaj plaws rau kev ua cov silica refractory cib. High-zoo silica xuab zeb nrog siab SiO2 cov ntsiab lus, tsis muaj impurities, thiab haum particle loj yog nyiam.
 

Kaolin los yog av nplaum
Cov me me ntawm kaolin lossis av nplaum tuaj yeem ntxiv rau silica xuab zeb los txhim kho nws cov yas thiab molding zog.
 

Alumina
Ib qho me me ntawm alumina tuaj yeem muab ntxiv rau silica xuab zeb txhawm rau ua kom cov refractoriness thiab mechanical zog ntawm cov cib.
 

Cov ntaub ntawv
Organic binders, xws li hmoov txhuv nplej siab los yog cellulose, tej zaum yuav muab ntxiv rau cov khoom siv raw sib tov los txhim kho lub zog thiab plasticity ntawm cov cib.
 

Cov tshuaj ntxiv
Ib qho me me ntawm ntau yam khoom ntxiv tuaj yeem muab ntxiv rau hauv qhov sib tov los txhim kho cov khoom tshwj xeeb ntawm cov khoom tiav, xws li thermal shock resistance lossis corrosion resistance. Qhov tseeb muaj pes tsawg leeg ntawm refractory silica bricks yuav txawv nyob ntawm seb yuav tsum tau daim ntawv thov, txheej txheem tsim, thiab muaj cov ntaub ntawv raw. Txawm li cas los xij, silica xuab zeb yog ib qho tseem ceeb ntawm cov khoom siv refractory silica cib, thaum lwm cov ntaub ntawv ntxiv rau hauv me me kom ua tiav cov khoom xav tau.

Siab melting point
Silica muaj lub siab melting point ntawm kwv yees li 1,710 degrees celsius (3,110 degrees fahrenheit). Cov cuab yeej no tso cai rau silica refractory cib kom tiv taus qhov kub thiab txias yam tsis muaj kev hloov pauv tseem ceeb.
 

Tsawg thermal expansion
Silica refractory bricks muaj cov coefficient tsawg ntawm thermal expansion, txhais tau tias lawv nthuav tsawg heev thaum raug kub. Cov yam ntxwv no yuav pab txo qis txoj kev pheej hmoo ntawm kev tawg lossis tawg, ua kom muaj kev ncaj ncees ntawm cov cib nyob rau hauv thermal stress.
 

Zoo thermal conductivity
Silica refractory bricks muaj cov thermal conductivity zoo, ua rau lawv muaj peev xwm hloov tau cov cua sov. Cov cuab yeej no yog qhov tseem ceeb hauv cov ntawv thov uas yuav tsum tau muab cov cua sov sib npaug los yog tshem tawm ntawm cov chaw tshwj xeeb.
 

Cov khoom siv tshuaj
Cov khoom siv tshuaj lom neeg ntawm silica refractory cib ua rau lawv zoo heev rau cov tshuaj corrosion. Nov yog qee cov tshuaj tseem ceeb ntawm silica refractory cib:
 

Acid kuj
Silica refractory cib muaj cov kua qaub ua haujlwm siab, ua rau lawv tsim nyog rau cov ntawv thov uas lawv nkag mus rau hauv cov tshuaj acidic. Lawv tuaj yeem tiv taus cov teebmeem corrosive ntawm cov kua qaub, suav nrog sulfuric acid thiab hydrochloric acid.
 

Alkali tsis kam
Silica refractory cib kuj ua rau pom zoo tiv thaiv alkalis, xws li sodium hydroxide thiab potassium hydroxide. Cov cuab yeej no tso cai rau lawv tiv taus qhov chaw alkaline feem ntau tshwm sim hauv cov txheej txheem kev lag luam.
 

Kev ruaj ntseg ntawm qhov kub thiab txias
Silica refractory bricks tseem nyob ruaj khov txawm tias nyob rau hauv qhov kub thiab txias, kom ntseeg tau tias lawv tswj lawv cov khoom siv tshuaj lom neeg thiab kev ua haujlwm zoo. Qhov kev ruaj ntseg no yog qhov tseem ceeb hauv cov ntawv thov uas cov cib raug rau ob qho tib si kub thiab tshuaj lom neeg.
 

Mechanical zog
Silica refractory bricks muaj cov khoom siv kho kom zoo uas ua rau lawv cov kav ntev thiab kev ntseeg tau. Nov yog qee cov khoom tseem ceeb ntawm silica refractory cib:
 

Siab compressive zog
Silica refractory bricks muaj lub zog compressive siab, ua rau lawv tiv taus siab yam tsis muaj deformation lossis tsis ua haujlwm. Cov cuab yeej no yog qhov tseem ceeb hauv cov ntawv thov uas cov cib tau raug hnyav los yog compression.
 

Tsawg thermal shock tsis kam
Silica refractory bricks muaj thermal poob siab tsis kam, txhais tau tias lawv tuaj yeem tiv taus qhov kub thiab txias hloov tsis tau tawg lossis tawg. Cov cuab yeej no yog qhov tseem ceeb hauv cov ntawv thov uas cov cib raug rau cov cua sov thiab cua txias.

Lub refractory silica cib yog tsim los ua ntau yam asymmetric duab, uas feem ntau yog keyed los yog interlocked nrog ib leeg los ntawm kev hais lus thiab grooves. Nws yog lub hom phiaj ntawm cov chaw tsim khoom ntawm silica refractory cib los xaiv cov ntaub ntawv raw thiab cov txheej txheem firing nyob rau hauv xws li ib tug yam ntxwv uas lub degree ntawm quartz transformation yog haum rau lub npaj daim ntawv thov ntawm lub cib. Cov khoom siv raw rau silica cib yog ib txwm tshwm sim quartzite uas yuav tsum tau ua kom tau raws li qee qhov yuav tsum tau ua kom ua tiav cov khoom cib zoo. Yog hais tias refractoriness los yog thermal expansion nyob rau hauv load (creep) yog lub ntsiab yuav tsum tau, ib tug quartzite ntawm cov tshuaj purity siab yuav tsum tau xaiv. Cov khoom siv raw rau ntim khoom ruaj khov yuav tsum muaj cov khoom hloov pauv zoo.

Cov tshuaj lom neeg muaj pes tsawg leeg ntawm quartzite yog ib qho tseem ceeb hauv nws qhov kev ntsuam xyuas raws li cov khoom siv raw, tshwj xeeb tshaj yog cov ntsiab lus ntawm alumina thiab alkalis, vim cov no txo ​​cov ntsiab lus melting thiab txiav txim siab txo qhov muaj peev xwm ntawm daim ntawv thov. Tsis tas li ntawd, kev tua hluav taws ntawm quartzite yuav tsum raug coj mus rau hauv tus account. Tom qab ntxuav cov ntaub ntawv nyoos tau raug crushed, hauv av thiab tshuaj ntsuam xyuas rau ntau yam khoom seem, cov feem ntawm tus kheej tau muab tso rau hauv qhov kev txiav txim siab ua ntej raws li qhov yuav tsum tau ua ntawm daim ntawv thov. Feem ntau, muller mixers yog siv rau kev sib xyaw thiab cov khoom sib txuas tshwj xeeb. Feem ntau nyob ib ncig ntawm 2% slaked txiv qaub nyob rau hauv kua daim ntawv (kua txiv qaub) thiab ib co sulphite tov raws li ib tug ib ntus binder, yog ntxiv rau tib lub sij hawm. Qhov sib xyaw friable yog tom qab ntawd ua tiav ntawm kev sib txhuam los yog hydraulic presses.

Cov duab nyuaj lossis cov uas yuav tsum tau khiav luv luv, tseem rammed los ntawm tes. Kev ziab yuav siv sij hawm luv luv xwb, ib mus rau ob hnub, vim cov txiv qaub sib txuas silica tsis rhiab heev thaum ziab. Lub reversible thermal expansion kuj nyob ntawm cov ntxhia muaj pes tsawg leeg. Tridymite thiab cristobalite tsis nthuav tawm linearly thaum lub sij hawm cua sov tab sis pom tam sim ntawd hloov nyob rau hauv ntev ob qho tib si thaum tshav kub kub thiab thaum txias.

Cov kev hloov hauv qhov ntev yog tshwm sim los ntawm kev hloov pauv tam sim ntawd ntawm qhov chaw lattice ntawm cov zaub mov no. Quartz qhia tau hais tias xws li kev hloov pauv ntawm 573 deg C, tridymite ntawm 117 deg C, thiab cristobalite ntawm 225 deg C thiab 270 deg C. Nws yog ib qho tseem ceeb uas yuav tsum tau muab sau tseg hauv particular tias thermal expansion ntawm cristobalite yog considerably ntau dua li ntawm tridymite. Vim hais tias zoo hloov silica bricks muaj me me los yog tsis muaj residual quartz, lawv tus cwj pwm nyob rau hauv tus ntawm qhov kub thiab txias yog txiav txim siab los ntawm qhov ratio ntawm cristobalite rau tridymite.

Thaum lub sij hawm cua sov, silica bricks nthuav tawm sai heev nrog rau tag nrho cov reversible expansion tau ua tiav nyob ib ncig ntawm 800 deg C. Yog li ntawd lawv yog insensitive rau qhov kub thiab txias fluctuations saum 800 deg C (liab tshav kub), tab sis heev raug rau hauv qab no kub vim hais tias ntawm lub sudden ntim expansion. . Vim li no, lub sijhawm txaus yuav tsum tau tso cai rau cov cua kub cua sov txog li 800 deg C. Ib tug yam ntxwv ntawm silica bricks yog qhov txawv ntawm tsuas yog 10 K ntawm qhov pib thiab ua tiav ntawm softening thaum lub sij hawm refractoriness nyob rau hauv load test. Vim lawv cov ntsiab lus iav tsawg, cov cib tsim cov kua me me ntawm qhov kub thiab txias. Tus nqi ntawm cov kua theem ntawm 1600 deg C yog nyob nruab nrab ntawm 10% thiab 20% thiab tsuas yog nce siab tshaj 1650 deg C. Vim li no, silica bricks tuaj yeem siv tau mus txog qhov melting point. Thaum siv cov kub kub dhau, ua ke nrog tshuaj tua kab mob, cov cib poob los yog khiav.

Thermal expansion nyob rau hauv load (creep) thiab cov ntsiab lus ntawm cov kua theem yog adversely cuam tshuam los ntawm Al2O3 cov ntsiab lus tshwj xeeb. Cov kev cai rau silica bricks, uas tau nce nyob rau hauv lub xyoo tsis ntev los no rau coke ncu, blast furnace qhov cub, thiab iav rauv tau coj mus rau txoj kev loj hlob ntawm heev tuab bricks tsawg nyob rau hauv fluxing agents. Cov cib tshwj xeeb no, siv cov khoom siv raw hauv lawv qhov chaw tsim khoom, muaj tib qhov ntau ntawm cov kua nplaum ntawm 1695 ° C vim tias muaj cov cib li qub ntawm 1650 ° C. Yog li ntawd lawv muaj qhov kub thiab txias ua ntej kev puas tsuaj pib los ntawm melting thiab poob dej. Raws li qhov tshwm sim ntawm lawv qhov siab ceev, tshwj xeeb silica cib rau coke ncu muaj thermal conductivity ntau dua li cov silica cib. Qhov no txhim kho cov thermal efficiency ntawm coke cub roj teeb.

Cov neeg ua hauj lwm khi siv nyob rau hauv kev tsim cov refractory silica bricks yog sulfite pulp pov tseg kua thiab mis nyuj ntawm txiv qaub. Txiv qaub kua txiv raws li ib tug binding neeg sawv cev, plays lub luag hauj lwm ntawm plasticizer. Mis ntawm txiv qaub ua rau lub cib nyob rau hauv cov txheej txheem ziab kom muaj zog thiab, nyob rau hauv lub firing, ua ib tug mineralizing neeg sawv cev, txhawb kev hloov ntawm quartz. Txiv qaub yuav tsum muaj ntau ntawm CaO active, undecomposed CaCO3, thiab MgCO3 tsis ntau tshaj 5%, Al2O3 + Fe2O3 + SO2F ntau tshaj 5%. Thaum muaj cov khoom loj ntawm underburned Ca-CO3 thiab overburned txiv qaub, cov khoom tsim ib lub qhov yaj, cuam tshuam qhov zoo ntawm cov khoom. Batching yuav tsum tau hloov mus rau qhov sib ntxiv ntawm txiv qaub CaO, tus nqi ntawm nws qhov sib ntxiv nyob ntawm cov khoom sib txawv, feem ntau fluctuating hauv 1.5-2.5%. Piv txwv li, kev tsim cov coke cub silica cib, CaO ntxiv ntawm 2.0-3.0%; tsim hluav taws xob rauv sab saum toj silica cib, CaO ntxiv ntawm 1.4-1.75%.

Txais silica nrog cov ntsiab lus impurity tsawg dua 0.5%, thiab yaug nws nrog dej kais dej ua ntej batching kom ntseeg tau tias qhov zoo nyob rau theem pib. Batching yuav ceev hloov ntawm quartz thiab qeeb hloov dua siab tshiab ntawm quartz sib xyaw cov khoom xyaw, uas tuaj yeem ua rau kub hnyiab tau 20 degree. Qhov loj particle loj yuav raug txo los ntawm 3 hli mus rau 2 hli nyob rau hauv cov txheej txheem batching, uas yuav ua rau kom lub interfacial zog ntawm cov khoom thiab txhawb lub transformation ntawm quartz. Tsis tas li ntawd, kev xaiv cov tshuaj mineralizing tshiab kuj tseem ceeb heev los txhim kho cov khoom zoo. Tam sim no, feem ntau cov neeg tsim khoom ntawm cov khoom xyaw ntxiv rau tus neeg sawv cev mineralizing tseem yog txiv qaub kua txiv thiab cov nplai hlau. Txhawm rau txhim kho qhov ntsuas kub ntawm cov khoom lag luam, qhov sib ntxiv ntawm FeO tau raug txo los ntawm 2.5% mus rau tsawg dua 1%. Yog tias siv cov feldspar-hom minerals uas muaj cov hlau alkali lossis cov khoom siv sib xyaw ua ke tuaj yeem tau txais txiaj ntsig zoo dua.

Tsis yog cov khoom no yuav tsum tau muab cia rau hauv lub tsev khaws khoom tsis muaj dej, dej ntub dej ntawm qhov kub qis dua 100 degree qeeb kom qhuav tuaj yeem siv tau. Cov dej uas muaj silica bricks yuav cuam tshuam lub zog tom qab khov, thiab yuav tsum tau rov kuaj dua tom qab ziab. Lub masonry ntawm refractory bricks yuav tsum tawm expansion pob qij txha raws li expansion tus nqi muab los ntawm cov chaw tsim tshuaj paus. Refractory cib ncu los yog siv lub sij hawm ntawm qhov kub thiab txias thiab lub sij hawm nkhaus yuav tsum tau tsim tsim nyog, tshwj xeeb tshaj yog ua ntej 600 degree expansion khaus yuav tsum nruj me ntsis tswj. Masonry refractory cib siv cov av nkos zoo kom sib haum nrog cov refractory cib, qee zaum Refractory bricks cib puas yog vim cov refractory bricks 'cov pob qij txha tau xub etched ua rau alkali vapor rau hauv yav tas los qhia masonry refractory bricks cib pob qij txha yuav tsum.

Tam sim no qee lub iav factories los ua kom kub melting thiab ntev lub neej tag nrho ntawm lub kiln, lub qhov cub me me qhov ncauj, thiab lub hauv siab phab ntsa siv electrofused zirconium corundum refractory bricks, thiab ib co ntawm cov vault los yog ib feem ntawm nws siv lwm yam ntaub ntawv. Lub refractory silica cib noj piv yuav me dua, tab sis lub refractory silica cib muaj ib tug siab load softening kub, hnav, tsis tshua muaj nqi, thiab lwm yam peev xwm, lub iav kiln koov thiab ib feem ntawm lub Upper qauv ntawm lub cub tawg yuav tseem siv refractory silica cib. . Yog li ntawd, kev txhim kho qhov zoo ntawm iav kiln refractory bricks tseem tsis tuaj yeem tsis quav ntsej.

Hoobkas tsim nyob rau hauv 1984, International lag luam department tsim nyob rau hauv 2010. Hoobkas nrog 10000 m2 cheeb tsam, 120 neeg ua hauj lwm nrog rau 20 kws engineers. CH REFRACTORIES yog cov chaw tsim khoom ntawm hluav taws kub, mortar, Pre-cam khwb cia, Preform, Rwb thaiv tsev cov khoom, Castable, Functional Products for Iron & Steel, Cement, Glass, Power & Petrochemical Industries. Ntxiv mus, CH REFRACTORIES tseem raug tsim thiab xa tawm cov cement refractory A600 A700 A900 CA70, Bauxite thiab lwm yam refractories raw khoom rau tag nrho lub ntiaj teb no.

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