Yuav ua li cas yuav ua rau ib tug refractory qhob nrog lawv ob txhais tes?

Siv cov kev faib ntawm cov chaw rau txawv hom phiaj feem ntau yuav tsum tau siv hluav taws-resistant cov ntaub ntawv. Lawv muaj peev xwm yuav siv tau los tiv thaiv cov neeg cov lug. Raws li ib tug ntawm xws ntaub ntawv protrudes refractory qhob. Ib txhia ntawm nws cov variants muaj peev xwm ntawm niaj raug kub txog li 1000 ° C, thiab qhov zoo thiab pab tau khoom no khaws cia.

Ntsiab zog

Ntawm cov yam ntxwv tseem ceeb ntawm tej pob zeb yuav tsum tau tseem ceeb:

• siab refractoriness;
• kho kom zoo kev ua tau zoo zog;
• lub dag lub zog;
• tsis muaj yuav tsum tau siv ib qho kim firing txheej txheem nyob rau hauv qhov siv thiab ua.

Rau hnub tim, refractory qhob yuav txwv kom muab zais los ntawm ceeb thawj. Ua koj tus kheej los yog kev txiav txim yuav tau piav los li nram qab no hom ntawm cov ntaub ntawv uas:

• tshwj xeeb mob loj heev;
• yooj yim;
• ntxaij;
• hnyav.

Raws li ib tug tshwm sim, cov ntaub ntawv uas muaj peev xwm muab tau uas muaj peev xwm ua tau yam ntxwv los yog insulating nuj nqi uas yog nyob rau nyob tus yeees ntawm muaj.

raug nta

Yog hais tias koj tau txiav txim siab los ua refractory ua vaj tse, nws yuav tsum tau ib tug los ze zog saib nyob rau hauv nws muaj pes tsawg leeg. Khoom tseg rau lub hauv paus ntawm lub pib kawm thiab tej additives, cov uas yog:

• Fireclay xuab zeb;
• magnesite;
• Txawv hom rubble ;
• aluminous xis mas.

Ntawm cov additives yuav tseem faib zeb hauv av thiab lwm yam minerals tawm, uas muab cov khoom zog. Cov xws additives:

• pumice;
• finely av chromite ore;
• moj tej tawg cub tawg slag.

Cov Cheebtsam yog ntxiv rau kom cov kev ceev ntawm tsis tsuas yog lub tiav lawm cov khoom, tab sis kuj qhuav muaj pes tsawg leeg. Tej zaum, placeholders rau ntau lawm ua nyob rau hauv cov nroj tsuag, tab sis nyob rau hauv tej rooj plaub tej zaum yuav siv refractory pob zeb thiab sib ntaus raug rho tawm haujlwm refractory bricks. Rau ntau qib ntawm qhob ntxiv aggregates ntawm txawv tog. Yog hais tias nws yog ib tug teeb meem ntawm ntxhib, lub ntsiab tej zaum yuav muaj ib lub cheeb nyob rau hauv ntau ntawm 5 rau 25 hli. Thaum nws los txog rau nplua, nws yog cov kev txwv ntawm 0.15 thiab 5 hli. Cov no cov khoom xyaw yuav tsum tau tseem ceeb:

• magnesite cib;
• fireclay bricks;
• sib ntaus sib tua zoo tib yam cib;
• aluminous slag;
• diabase;
• basalt;
• depleted moj tej tawg cub tawg slag.

Feem ntau cov tau txais kev pab yog ib tug refractory ua vaj tse, uas yog manufactured siv hluav taws av nplaum, vim hais tias nws muaj raws li tag nrho cov kev xav tau ntawm kev tsim kho. Lub aluminophosphate cov khoom xyaw thiab kua iav ua raws li ib tug neeg. Portland, Magnesite thiab aluminous cements , thiab ua hauj lwm raws li binders Cheebtsam. Yog hais tias cov khoom xyaw no ntxiv rau cov dej iav, nws yuav ua tau kom qhov kev kawm. Qhov no yog tshwj xeeb tshaj yog muaj tseeb yog tias lub pob zeb mix siv los tsim ib tug plaster txheej.

Rau ntau lub tswv yim rau technology

Refractory ua vaj tse, muaj pes tsawg leeg uas yog tau piav nyob rau hauv tsab xov xwm, tej zaum yuav muaj ib yam hom. Txhua ntau yam yuav tsum tau qhov sib ntxiv ntawm nws plasticizer, magnesite hmoov thiab ferrochromium slag. Yog hais tias koj muaj ib lub hom phiaj los npaj sib ua vaj tse, koj yuav tsum siv lub txhab khoom siv ntawm lub hom:

• vermiculite;
• txhab av nplaum;
• perlite.

Yog hais tias koj txiav txim siab mus yuam kom cov zus tau tej cov sib tov los ntawm ib tug kws, tus piv ntawm lub Cheebtsam, lawv yuav tuaj tos lawv tus kheej, nyob rau hauv raws li koj qhov project. Muaj pes tsawg leeg yog xaiv raws li lub ua hauj lwm kub thiab kev pab cuam tej yam kev mob.

Nyob rau hauv tas li ntawd, cov muaj pes tsawg leeg ntawm lub hom muab tub lim

Yog hais tias koj txiav txim siab mus ua ib tug refractory qhob nrog lawv txhais tes, ces koj tau txawv fillers yuav siv tau, namely:

• dinas;
• Corundum;
• quartz;
• npaj txhij hmoov sib tov.

Xav lub pob zeb ua muaj pes tsawg leeg, highlight lub hom. Piv txwv li, ASBG yog ib tug qhuav refractory txhuas-muaj sib tov, uas yog siv nyob rau hauv ferrous thiab nonferrous metallurgy thiab thermal lub hwj chim. High-alumina qhob nrog refractory zog abbreviated VGBS thiab yog npaj los tsim ib tug monolithic hauv ob sab phlu ntawm casting ladles, cov phab ntsa thiab hauv qab ntawm lub ntaus ntawv.

Tej pes tsawg leeg tej zaum yuav siv tau nyob rau kub txog li 1800 ° C. Reinforcing qhuav sib tov ntawm high-Saba xaiv los ntawm cov tsiaj ntawv. Nws yog npaj rau thermal units, ncu thiab apparatus ntawm lub reinforcing txheej. Raug kub yuav ncav cuag cov theem ntawm 750 ° C.

Screed

Qhuav ntawm refractory qhob yuav nqa tawm tom qab kawm tiav ntawm lub hardening kauj ruam. Nyob rau hauv cov ntaub ntawv no huab cua yog siv thiab cov ambient kub yuav tsum tsis txhob yuav tsawg tshaj li +10 ° C. Ua ntej thawj zaug cua kub qhob yuav tsum tau khaws cia rau ib hnub twg los yog ntau tshaj mus cuag ib tug neeg twg lub xeev. kom qhuav lag luam tso cai rau kom txo tus nqi ntawm cov dawb dej nyob rau hauv lub pob zeb, uas yuav ua ib tug tshuaj tshuaj tiv thaiv ntawm cov cua thiab tej hauv ob sab phlu.

Tom qab tua cov liner yog tshuav nyob rau hauv ib tug noo cua tsis qhuav. Tom qab curing tiav yuav tsum qhuav hauv ob sab phlu. Yog hais tias qhov no yog tsis tau, lub pob zeb yog tshuav nyob rau hauv ib tug kaw noo ib puag ncig. Nws yog ib qho tseem ceeb kom zoo cua los yog tawm hauv lub liner nyob rau hauv ib tug zoo-ventilated cheeb tsam. Yog hais tias koj muaj wondering yuav ua li cas yuav ua rau refractory ua vaj tse, lawv yuav tsum tau me ntsis txog cov cov yam ntxwv thiab txawm npaj nws rau lub lag luam. Piv txwv li, lub qhuav kauj ruam yuav siv sij hawm qhov chaw siv ib tug haum kiv cua los yog blower, uas yuav muab kub huab cua.

nta kneading

Ua ntej ua ib tug refractory qhob nrog lawv txhais tes, nyob tus yeees ntawm cov tshuaj yuav tsum tau kom zoo zoo xaiv. Qhov no twb tau teev saum toj no. Raws li rau cov yam ntxwv ntawm cov mixing, ces nws yog pom zoo kom siv ib tug duav. Nws yog preferable rau thaum tshav kub kub-insulating ua vaj tse, tab sis rau cov khoom ntsiab thiab ntawm tag nrho cov tsim nyog, txij thaum nws tso cai rau sib tov uniformly thiab yog cov ntaub ntawv uas nrog tas li ntawd ntawm dej tsawg. Nrog kev xav txog cov MAAs tov khoom, ces cov nyhuv yuav nyuaj heev kom ua tau.

Qhov no kev pom zoo yog cov tseem rau lub yog vim li cas hais tias, rau tuab qhob dej cov ntsiab lus yuav ua tau ib qho tseem ceeb. Tom qab tag nrho, rau qhov piav ntaub ntawv lub siab tshaj plaws zog yog yuav tsum tau, nrog rau kev pom kev ceev. Los ntawm lawv qhov, insulating qhob yog softer dua lub ntom, li ntawd nws yog ib qho tseem ceeb hais tias lawv yog kneaded nrog yuav tsum tau npaum li cas ntawm cov dej. Nws tshaj yuav ua rau ib tug txo nyob rau hauv lub dag lub zog thiab ceev, whereas ib tug tsis muaj yuav ua rau ib tug txo nyob rau hauv tawm los.

Lub proportions ntawm refractory qhob

Kev npaj ntawm refractory qhob yuav tsum tau ua nyob rau hauv kev ua raws cai nrog rau tej kev proportions. Yog hais tias siv ib cov khoom npaj rau tebchaws hluav taws, ces tom qab solidifying cov tshuaj yuav tsum tau los mus tiv kub nyob rau hauv cov kab 1200 ° C. Los ntawm cov sib tov yuav ua qhov cub thiab lub firebox. Rau kev ua hauj lwm yuav tsum tau ib tug qhob ib feem 1 M-400, 2 qhov chaw xuab zeb los ntawm refractory bricks, tib qhov chaw ntawm cov sib ntaus sib tua cib yam khoom noj, thiab 0,33 ib feem ntawm chamotte hmoov av additive.

Yog hais tias koj yuav npaj mus tsim ib tug khoom center, ces nyob rau hauv nws lub sij hawm lub lag luam ntawm cua kub cov khoom yuav tsum muaj feem xyuam rau ib qhib nplaim taws. Qhov no yuav tsum tau los npaj ib tug tov nrog cov nram qab no proportions: 2.5 qhov chaw ntawm crushed pob zeb, pob zeb ua ib feem, 0,33 ib feem ntawm chamotte xuab zeb. Raws li rau rubble, tej zaum nws yuav tsum ua los ntawm quartz los yog liab av ci, hloov tej zaum kuj siv zeb hauv av cib liab.

xaus

Thaj chaw ntawm ib tug tov rau tsim ib tug refractory qhob zoo li cov uas siv nyob rau hauv cov pa MAAs slurry nws. Yog hais tias lub sau yuav tsum tau nqa tawm mus rau hauv lub formwork, cov lus tsa suab yuav tsum tau raws kev coj clockwise. Tej zaum cov khoom no yuav siv rau txoj kev nrhiav los ntawm plywood.

Nyob rau hauv kev txiav txim kom tsis txhob evaporation ntawm dej thaum lub sij hawm solidification, lub puab tom qab qhov siv thiab ua yuav tsum raug khi. Qhov no tswj yooj yim tshem tawm ntawm castings. Qhov yooj yim txoj kev uas yuav muab - polyethylene, tab sis nyob rau hauv thiaj li yuav ua tau qhov zoo tshaj plaws kev tshwm sim, koj yuav tsum tau siv silicone, uas yog pre-lubricated nrog zaub roj.