Pyrolysis carbonization technology yog ib txoj kev kho mob uas siv qhov kub thiab txias los pyrolyze organic Cheebtsam nyob rau hauv anaerobic tej yam kev mob thiab thaum kawg tsim cov khoom carbon compounds. Nyob rau hauv cov txheej txheem ntawm pyrolysis thiab carbonization, ib tug loj npaum li cas ntawm cov kua qaub gases xws li nitrogen oxides, sulfur oxides, carbon oxides, hydrogen chloride thiab hydrogen fluoride yuav raug tsim. Ntxiv nrog rau qhov kev txiav txim ntawm qhov kub thiab txias dej vapor, cov khoom siv hluav taws xob tsim hluav taws xob yuav ua rau lub hauv paus ntawm cov pa roj carbonization. Hauv ob sab phlu castables rau carbonization furnaces yuav tsum muaj zoo kub acid corrosion kuj, haum lub zog, tsis tshua muaj thermal conductivity thiab zoo heev thermal poob siab kuj. Txhawm rau coj mus rau hauv tus account cov khoom ntawm lub hauv ob sab phlu castables xws li lub zog, corrosion kuj thiab thermal conductivity, mullite thiab xim av corundum yog siv los ua cov ntaub ntawv tseem ceeb hauv kev tshawb fawb, thiab qee cov silicon carbide thiab alumina hollow spheres tau qhia ntawm lub tib lub sij hawm los npaj ib hom Carbonization rauv cov ntaub ntawv uas tsis muaj thermal conductivity thiab muaj zog acid corrosion kuj. Txhawm rau txhawm rau txhim kho lub zog thiab cov kua qaub tiv thaiv ntawm cov castable, raws li kev siv cov kev cai thiab kev ua haujlwm ntawm cov pa roj carbonization rauv hauv ob sab phlu, hauv kev ua haujlwm no, qhov ntxiv (w) ntawm alumina hollow spheres ntawm 1 ~ 0 .2mm yog 15 feem pua thiab Tsawg dua los yog sib npaug rau 0.074mm. Raws li kev sib ntxiv ntawm silicon carbide hmoov (w) ntawm 8 feem pua, cov teebmeem ntawm silicon hmoov thiab carbon dub ntawm cov khoom ntawm acid-resistant castables rau carbonization furnaces tau kawm.
xeem
1.1 Cov khoom siv raw
Cov ntaub ntawv tseem ceeb siv hauv kev xeem yog: fused mullite, ntom 2.71g·cm-3, particle loj 8 ~ 5, 5 ~ 3, 3 ~ 1, Tsawg dua lossis sib npaug 1, Tsawg dua lossis sib npaug {{10}} 074mm; density ntawm xim av corundum 3.90g·cm- 3, particle loj Tsawg dua los yog sib npaug rau 1, Tsawg dua los yog sib npaug rau 0.08mm; silicon carbide, particle loj Tsawg dua los yog sib npaug rau 0.074mm; alumina hollow kheej kheej, particle loj 1 ~ 0.2mm; Silica micropowder, ntshiab calcium aluminate cement, silica fume (tsawg dua los yog sib npaug rau 0.074mm), carbon dub hmoov. Admixtures muaj xws li polyphosphate dej txo tus neeg saib xyuas thiab cov organic fiber ntau tawg-pov thawj tus neeg saib xyuas.
1.2 Cov txheej txheem xeem thiab kev xeem ua haujlwm
Sib tov txhua yam ntawm raw cov ntaub ntawv tusyees nyob rau hauv kev faib ua feem, ntxiv dej thiab do, thiab vibrate rau cov qauv ntawm 40mm × 40mm × 160mm thiab φ180mm × 30mm. Tom qab kho ntawm chav tsev kub rau 24 teev, cov pwm tso tawm. Tom qab kev txuag hluav taws xob ntawm 1100 degree rau 3h thiab 1350 degree rau 3h, qhov ntom ntom (YB / T5200-1993), compressive zog (GB / T5072-2008), flexural zog (GB / T3001-2007), thiab linear hloov ntawm cov kuaj cov qauv raug kuaj. tus nqi (GB/T5988-2007). Raws li HG/T3210-2002, cov qauv tau sim rau cov kua qaub tiv thaiv nrog nitric acid tov nrog cov concentration ntawm 50 feem pua.
Cov txiaj ntsig thiab kev sib tham
2.1 Kev cuam tshuam ntawm tus nqi ntawm silicon hmoov ntxiv rau cov khoom ntawm acid-resistant castables rau carbonization furnaces
Tom qab cov qauv raug kho ntawm qhov sib txawv ntawm qhov kub thiab txias, nrog rau qhov nce ntawm cov hmoov silicon hmoov ntxiv, qhov kev hloov pauv ntawm qhov ntom ntom ntom ntom tsis zoo ib yam. Qhov ntom ntom ntawm cov qauv kho ntawm 110 degree pib txo qis nrog qhov nce ntawm cov nyiaj ntawm silicon hmoov ntxiv. Qhov ntau ntom ntawm cov qauv kho ntawm 1100 degree poob me ntsis nrog qhov nce ntawm cov nyiaj ntawm silicon hmoov ntxiv. Qhov ntom ntom ntawm cov qauv yog qhov siab dua li tom qab kev kho mob ntawm 1100 degree.
Hauv cov phiaj xwm kev sim, tib tus nqi ntawm silicon hmoov tau siv los hloov cov hmoov silicon carbide. Qhov ntom ntawm silicon carbide ntau dua li ntawm silicon. Raws li qhov loj me me, qhov sib txawv ntawm qhov ntom ntawm ob cov ntaub ntawv raw ua rau qhov sib txawv ntawm qhov ntom ntom ntawm cov qauv ntawm 110 degree. Nrog rau qhov nce ntawm cov nyiaj ntawm silicon hmoov ntxiv, qhov ntom ntom ntawm cov qauv txo qis. Nyob rau hauv cov xwm txheej ntawm 1100 degree kev kho mob, qhov ntau ntom ntawm cov qauv txo qis me ntsis nrog qhov nce ntawm cov silica fume ntxiv, vim tias cov silica fume yog ib feem oxidized los tsim silica, thiab reacts nrog cement, silica fume thiab lwm yam khoom siv los tsim. ib tug tsawg-melting kua theem. , cov pa roj carbon monoxide txo cov cua nyob rau hauv cov kev sim ntsuas tiv thaiv cov txheej txheem oxidation. Qhov txo qis ntawm qhov ntom ntom ntawm 110 degree kev kho mob feem ntau yog vim cov dej tsis sib haum xeeb. Tom qab kev kho cua sov ntawm 1350 degree, qhov nce ntawm qhov ntom ntom ntawm cov qauv piv nrog 1100 degree feem ntau yog tshwm sim los ntawm cov tshuaj tiv thaiv sintering. Silicon tsis yaj ntawm 1350 degree C. Ntawm ib sab, nws tus kheej oxidation tuaj yeem tiv thaiv oxidation ntawm silicon carbide, thiab tej zaum yuav hnov mob nrog carbon dub los ua silicon carbide; Ntawm qhov tod tes, qhov kub nce ua rau cov txheej txheem tsim cov tshuaj tiv thaiv ntawm eutectic. Nws yooj yim dua rau kev ua thiab tuaj yeem txhawb nqa qhov ntom ntom ntawm cov qauv.
Nyob rau hauv cov nqe lus ntawm kev hloov pauv hauv online, nws tuaj yeem pom los ntawm daim duab 2 tias nyob rau hauv qhov xwm txheej ntawm 1100 degree, cov kab hloov pauv ntawm cov qauv nrog cov nqi sib txawv ntawm cov hmoov silicon tsis txawv ntau, thiab lawv txhua tus pom qhov sib txawv, qhia. tias cov qib ntawm cov tshuaj tiv thaiv ntawm cov hmoov silicon yog me me, thiab ntawm 1350 Nyob rau hauv cov xwm txheej ntawm degree, nws yog ze rau lub melting point ntawm silicon. Hauv cov txheej txheem no, cov hmoov silicon tau dhau los ua qhov pom tseeb cov tshuaj tiv thaiv thiab sintering, uas ua rau ntau qhov ntom ntawm cov qauv nce, qhov pom meej porosity yuav maj mam txo, thiab cov kab shrinkage yuav nce, thiab cov nyhuv no ntau dua li ntawm kyanite molybdenum. Kev nthuav dav los ntawm cov tshuaj tiv thaiv petrochemical.
Lub zog ntawm cov qauv kho ntawm 110 degree ntawm chav tsev kub muaj qhov sib txawv me ntsis. Lub zog ntawm qhov ntsuas kub no feem ntau yog los ntawm kev sib xyaw ntawm cov ntxhia theem hydrate hauv calcium aluminate cement mus rau theem system. Cov ntsiab lus ntawm cov cement yog tib yam, yog li lub zog sib txawv tsis loj. Tom qab kev kho cua sov ntawm 1100 degree, lub zog flexural thiab compressive zog ntawm cov qauv qhia tau hais tias ib qho kev sib tw ntawm kev sib tw nrog kev nce ntawm cov hmoov silicon ntxiv, qhia tias cov hmoov silicon tau ua lub luag haujlwm hauv kev txhim kho lub zog ntawm qhov kub thiab txias. Tom qab kev kho cua sov ntawm 1350 degree, lub zog ntawm cov qauv hloov pauv pom tseeb nrog qhov nce ntawm cov hmoov silicon ntxiv. Tshwj xeeb tshaj yog thaum tus nqi ntawm silicon hmoov ntxiv ntau tshaj 2.5 feem pua (w), txawm hais tias lub zog flexural ntawm cov qauv nce, lub zog compressive txo qis piv nrog rau tom qab kev kho cua sov ntawm 1100 degree. Kev soj ntsuam qhia tau hais tias nyob rau hauv qhov kub thiab txias ntawm 1350 degree, qee cov ntsiab lus ntawm cov khoom ua kua theem tau tsim nyob rau hauv cov qauv, uas ua rau txo qis hauv qhov toughness ntawm cov castable nyob rau hauv chav tsev kub thiab ib qho kev nce hauv brittleness, tshwj xeeb tshaj yog rau sab hauv tsis sib xws. qauv ntawm castable, lub zog yog cuam tshuam los ntawm ntau yam tsis xws luag. , cov kab nrib pleb thiab lwm yam ua rau rhiab heev, ua rau tsis sib haum xeeb hauv lub zog flexural thiab compressive zog. Xav txog kev cuam tshuam ntawm silicon hmoov ntawm lub zog flexural thiab compressive zog, qhov tsim nyog ntawm silicon hmoov ntxiv yog li 2.5 feem pua (w).
nyob rau hauv xaus
(1) Silicon hmoov tsis tshua muaj kev cuam tshuam rau lub zog ntawm acid-resistant castable qauv ntawm 110 degree. Nyob rau ntawm 1100 degree, silicon hmoov pib mus rau oxidation cov tshuaj tiv thaiv, thiab nyob rau ntawm 1350 degree, silicon hmoov undergoes pom tseeb cov tshuaj tiv thaiv thiab sintering, ua rau cov bulk ntom ntawm cov qauv nce. , linear shrinkage tus nqi nce, thiab cov nyhuv no tshaj qhov nthuav cov nyhuv tsim los ntawm cov tshuaj tiv thaiv kyanite mulliteization. Raws li qhov kev sim, qhov tsim nyog ntawm silicon hmoov ntxiv yog li 2.5 feem pua (w).
(2) Ntawm qhov kub ntawm 110 thiab 1100 degree, lub zog ntawm cov pa roj carbon dub yog txo vim qhov nce ntawm cov dej ntxiv rau cov kua qaub-resistant castable. Ntawm 1350 degree, cov tshuaj tiv thaiv ntawm carbon dub thiab silicon hmoov tuaj yeem txhim kho lub zog. nyhuv. Qhov sib ntxiv ntawm cov pa roj carbon dub yog qhov zoo rau kev txhim kho cov kua qaub tiv thaiv ntawm cov castable, tab sis qhov sib ntxiv ntawm cov pa roj carbon ntau dhau yuav ua rau cov porosity ntawm cov castable. Raws li cov txiaj ntsig kev sim, thaum ntxiv cov pa roj carbon dub yog 1.5 feem pua (w), cov kua qaub-resistant castable muaj lub zog tsim nyog thiab acid tsis kam.
