Feem ntau ntawm cov khoom siv raw ntawm cov khoom siv refractory yog cov khoom siv bismuth uas tsis yog yas, thiab nws nyuaj rau ua lawv tus kheej rau hauv cov khoom tiav ib nrab. Yog li ntawd, nws yog qhov tsim nyog los siv cov organic binder sab nraud lossis cov inorganic binder lossis cov sib xyaw binder. Ntau yam khoom siv refractory tshwj xeeb raug rau kev sib xyaw ua ke nruj thiab raug kom ua cov khoom siv av nrog cov khoom sib npaug, cov dej sib npaug, qee yam plasticity thiab yooj yim tsim thiab cov khoom tiav ib nrab. Nws yog qhov tsim nyog los txais yuav cov txheej txheem ntau lawm nrog kev ua haujlwm siab, cov txiaj ntsig sib tov zoo thiab kev sib tov tsim nyog.
(1) Kev sib phim ntawm cov khoom me me
Cov pob zeb billet (av nplaum) tuaj yeem ua rau cov khoom muaj qhov ceev tshaj plaws los ntawm kev xaiv cov khoom sib xyaw ua ke. Hauv kev xav, ib lub pob loj ib zaug ntawm ntau nti thiab cov ntaub ntawv sib txawv tau raug sim, thiab qhov ceev ntawm cov khoom yog zoo ib yam. Txawm li cas los xij, qhov porosity yog 38% ± 1%. Yog li ntawd, rau ib lub pob loj ib zaug, nws qhov ceev ntawm cov khoom thiab porosity yog ywj pheej ntawm qhov loj ntawm lub pob thiab cov khoom siv, thiab ib txwm muab tso rau hauv ib lub duab hexagonal nrog tus lej sib koom ua ke ntawm 8.
Txoj kev teeb tsa theoretical ntawm ib qho khoom me me uas muaj tib qhov loj me muaj ib lub voos xwmfab, ib lub kem oblique, ib lub kem oblique sib xyaw, ib lub duab pyramidal, thiab ib lub tetrahedron. Ntau txoj kev teeb tsa ntawm tib lub pob zeb loj me tau qhia nyob rau hauv daim duab 24. Kev sib raug zoo ntawm txoj kev tso cov khoom me me thiab qhov porosity tau qhia nyob rau hauv Rooj 2-26.
Yuav kom ua rau cov khoom ntom ntom ntau ntxiv thiab txo qhov porosity, siv lub voj voog uas tsis sib npaug, uas yog, ntxiv qee qhov me me rau lub voj voog loj kom ua rau lub voj voog muaj ntau ntxiv, thiab kev sib raug zoo ntawm qhov ntim uas lub voj voog nyob thiab qhov porosity tau qhia hauv lub rooj 2-27.
Nrog cov khoom xyaw clinker, cov khoom me me yog 4. 5 hli, cov khoom nruab nrab yog 0.7 hli, cov khoom me me yog 0.09 hli, thiab qhov kev hloov pauv ntawm clinker porosity ntawm clinker tau qhia nyob rau hauv Daim Duab 2-5.
Los ntawm Daim Duab 2-5, cov khoom me me yog 55% ~ 65%, cov khoom nruab nrab yog 10% ~ 30%, thiab cov hmoov zoo yog 15% ~ 30%. Qhov pom tseeb porosity tuaj yeem txo qis mus rau 15.5%. Tau kawg, cov khoom xyaw ntawm cov khoom siv refractory tshwj xeeb tuaj yeem hloov kho kom haum raws li cov khoom siv lub cev thiab cov duab ntawm cov khoom.
(2) Tus neeg sawv cev rau cov khoom siv refractory tshwj xeeb
Nyob ntawm seb hom khoom siv refractory tshwj xeeb thiab txoj kev molding, cov binders uas siv tau yog:
(1) Txoj kev grouting, gum arabic, polyvinyl butyral, hydrazine methyl cellulose, sodium acrylate, sodium alginate, thiab lwm yam.
(2) Txoj kev nias, suav nrog cov roj nplua nyeem, glycols,
Cawv polyvinyl, methyl cellulose, hmoov txhuv nplej siab, dextrin, maltose thiab glycerin.
(3) Txoj kev txhaj tshuaj kub kub, cov binders yog: paraffin wax, beeswax, lubricants: oleic acid, glycerin, stearic acid thiab lwm yam.
(4) Txoj kev casting, tus neeg sawv cev sib txuas: methyl cellulose, ethyl cellulose, cellulose acetate, polyvinyl butyral, polyvinyl cawv, acrylic; plasticizer: polyethylene glycol, dioctane Phosphoric acid, dibutyl peroxide, thiab lwm yam; tus neeg sawv cev dispersing: glycerin, oleic acid; cov kuab tshuaj: ethanol, acetone, toluene, thiab lwm yam.
(5) Txoj kev txhaj tshuaj, thermoplastic resin polyethylene, polystyrene, polypropylene, acetyl cellulose, propylene resin, thiab lwm yam, kuj tseem yuav ua kom sov cov phenolic resin tawv; lubricant: stearic acid.
(6) Isostatic nias txoj kev, polyvinyl cawv, methyl cellulose, siv cov kua qaub sulfite pulp, phosphate thiab lwm yam ntsev inorganic thaum tsim cov pellets.
(7) Txoj kev nias, methyl cellulose, dextrin, polyvinyl cawv, sulfite pulp pov tseg kua, syrup lossis ntau yam inorganic ntsev; sulfite pulp pov tseg kua, methyl cellulose, gum arabic, dextrin lossis inorganic thiab inorganic acid ntsev, xws li phosphoric acid lossis phosphates.
(3) Cov tshuaj ntxiv rau cov khoom siv refractory tshwj xeeb
Yuav kom txhim kho qee yam khoom ntawm cov khoom siv refractory tshwj xeeb, tswj kev hloov pauv ntawm cov khoom siv crystal, txo qhov kub ntawm cov khoom, thiab ntxiv me ntsis ntawm cov khoom sib xyaw rau hauv cov rooj tog. Cov khoom sib xyaw no feem ntau yog cov hlau oxides, cov hlau oxides uas tsis yog hlau, cov hlau oxides tsis tshua muaj ntiaj teb, fluorides, borides thiab phosphates. Piv txwv li, ntxiv 1% ~ 3% boric acid (H2BO3) rau γ-Al2O3 tuaj yeem txhawb kev hloov pauv. Ntxiv 1% txog 2% TiO2 rau Al2O3 tuaj yeem txo qhov kub ntawm kev hlawv (kwv yees li 1600 ° C). Ntxiv TiO2, Al2O3, ZiO2, thiab V2O5 rau MgO txhawb kev loj hlob ntawm cov noob cristobalite thiab txo qhov kub ntawm cov khoom. Ntxiv CaO, MgO, Y2O3 thiab lwm yam khoom ntxiv rau ZrO2 raw khoom tuaj yeem ua rau hauv cov kua nplaum cubic zirconia uas ruaj khov los ntawm chav tsev kub txog 2000 ° C tom qab kev kho mob kub siab.
(4) Txoj kev thiab cov khoom siv rau kev sib tov
Txoj kev sib tov qhuav
Lub tshuab sib tov uas muaj zog inclined countercurrent uas tsim los ntawm Shandong Konyle muaj qhov ntim ntawm 0.05 ~ 30m3, tsim nyog rau kev sib tov ntau yam hmoov, granules, flakes thiab cov ntaub ntawv viscosity qis, thiab muaj cov khoom siv ntxiv thiab txau kua.
2. Txoj kev sib tov ntub
Hauv txoj kev sib tov ntub dej ib txwm muaj, cov khoom xyaw ntawm ntau yam khoom siv raw tau muab tso rau hauv lub tshuab sib tov planetary uas muaj lub hau tiv thaiv rau kev sib tsoo zoo. Tom qab ua cov slurry, cov yas thiab lwm yam khoom sib xyaw tau ntxiv los kho qhov ceev ntawm cov av nkos, thiab cov khoom sib tov tau sib xyaw kom huv si hauv lub tshuab sib tov av nkos planetary ntsug, thiab granulated thiab ziab hauv lub tshuab ziab granulation.
Lub tshuab sib tov Planetary
3. Txoj kev sib xyaw yas
Yuav kom tsim tau ib txoj kev sib xyaw ua ke uas muaj ntau yam rau cov khoom siv refractory tshwj xeeb uas tsim nyog rau kev tsim yas lossis kev tsim sludge. Hauv txoj kev no, ntau yam khoom siv raw, admixtures, plasticizers, thiab cov roj nplua nyeem thiab dej raug sib xyaw kom huv si ntawm lub tshuab sib tov planetary, thiab tom qab ntawd sib xyaw thiab sib xyaw rau ntawm lub tshuab sib tov ua haujlwm siab kom tshem tawm cov npuas hauv cov av nkos. Yuav kom txhim kho qhov plasticity ntawm cov av nkos, cov av nkos raug sib xyaw nrog cov khoom qub, thiab cov av nkos raug rau qhov sib tov thib ob ntawm lub tshuab av nplaum ua ntej molding. Koneile tsim cov khoom sib tov ua haujlwm siab thiab muaj zog raws li qhia hauv qab no:
Kev sib tov khoom zoo thiab muaj zog
Cov khoom sib tov tam sim no
4. Txoj kev sib tov semi-qhuav
Haum rau cov txheej txheem sib tov uas muaj dej tsawg dua. Yuav tsum siv txoj kev sib tov semi-qhuav rau cov khoom siv refractory tshwj xeeb uas yog tshuab ua los ntawm cov khoom xyaw granular (cov khoom xyaw ntxhib, nruab nrab thiab zoo peb-theem). Cov khoom xyaw raug ua tiav hauv lub tshuab sib tov xuab zeb, lub tshuab sib tsoo ntub, lub tshuab sib tov planetary lossis lub tshuab sib tov yuam.
Cov txheej txheem sib tov yog ua ntej sib tov cov hmoov sib txawv, ntxiv cov kua dej uas muaj cov khoom sib txuas (inorganic lossis organic), thiab ntxiv cov hmoov zoo sib xyaw (suav nrog cov khoom pab hlawv, cov neeg sawv cev nthuav dav, thiab lwm yam khoom ntxiv). Cov neeg sawv cev) sib tov kom huv si. Lub sijhawm sib tov feem ntau yog 20 ~ 30 feeb. Cov av nkos sib xyaw yuav tsum tiv thaiv kev sib cais ntawm cov khoom me me thiab cov dej yuav tsum tau faib sib npaug. Yog tias tsim nyog, cov khoom siv av nkos yuav tsum tau ntes kom zoo thaum lub sijhawm molding.
Cov dej noo ntawm cov khoom av nplaum uas raug nias yog tswj tau ntawm 2.5% txog 4%; cov dej noo ntawm cov khoom pwm uas zoo li av nplaum yog tswj tau ntawm 4.5% txog 6.5%; thiab cov dej noo ntawm cov khoom pwm uas co yog tswj tau ntawm 6% txog 8%.
(1) Kev ua tau zoo ntawm CMP series ntawm cov khoom sib xyaw ua ke uas siv hluav taws xob zoo los ntawm Kone.
(2) Kev ua tau zoo ntawm cov xuab zeb ntub sib tov
5. Txoj kev sib tov av nkos
Txoj kev sib tov av nkos yog rau kev tsim cov khoom siv ceramic refractory tshwj xeeb, tshwj xeeb tshaj yog cov av nkos slurry rau gypsum txhaj tshuaj molding, casting molding thiab txhaj tshuaj molding. Txoj kev ua haujlwm yog sib tov ntau yam khoom siv raw, cov neeg sawv cev txhawb nqa, cov neeg sawv cev ncua, cov khoom sib tov thiab 30% txog 40% ntawm cov dej huv rau hauv lub tshuab sib tsoo pob (lub tshuab sib tov) nrog cov ntaub ntawv hnav-resistant, thiab sib tov thiab sib tsoo tom qab ib lub sijhawm. , ua rau hauv cov av nkos slurry rau molding. Hauv cov txheej txheem ntawm kev ua av nkos, nws yog qhov tsim nyog los tswj qhov ceev thiab pH ntawm cov av nkos raws li cov yam ntxwv ntawm cov khoom siv thiab cov kev xav tau ntawm cov av nkos casting nws tus kheej.
Lub tshuab sib tov muaj zog tam sim no
Cov khoom siv tseem ceeb siv rau hauv txoj kev sib tov av nkos yog lub tshuab zeb pob, lub tshuab cua compressor, lub tshuab tshem tawm hlau ntub, lub twj tso kua av nkos, lub tshuab nqus tsev deaerator, thiab lwm yam.
6. Txoj kev sib tov cua sov
Cov khoom siv paraffin thiab cov khoom siv resin yog cov khoom khov (lossis viscous) ntawm qhov kub ib txwm, thiab tsis tuaj yeem sib xyaw ntawm chav tsev kub, thiab yuav tsum tau ua kom sov thiab sib xyaw.
Thaum siv cov txheej txheem kub tuag casting, paraffin siv ua cov khoom siv khi. Vim tias qhov chaw yaj ntawm paraffin wax yog 60 ~ 80 ° C, cov paraffin wax raug cua sov rau saum 100 ° C thaum sib tov thiab muaj cov kua zoo. Tom qab ntawd cov hmoov zoo raw khoom raug ntxiv rau cov kua paraffin, thiab tom qab sib tov thiab sib tov tag nrho, cov khoom raug npaj. Lub ncuav mog qab zib wax yog tsim los ntawm kub tuag casting.
Cov khoom siv sib tov tseem ceeb rau kev ua kom sov qhov sib tov yog lub tshuab ua kom sov.
Lub sijhawm tshaj tawm: Lub Kaum Hli-20-2018
