Feem ntau ntawm cov khoom siv raw ntawm cov ntaub ntawv refractory yog cov ntaub ntawv uas tsis yog yas bismuth, thiab nws yog ib qho nyuaj rau kev ua lawv mus rau hauv cov khoom ib nrab ntawm lawv tus kheej.Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau siv cov khoom siv sab nraud los yog cov khoom siv tsis zoo los yog cov ntaub ntawv sib xyaw.Ntau yam tshwj xeeb refractory raw cov ntaub ntawv tau raug nruj thiab raug batching los ua cov av nkos nrog cov khoom sib xws, cov dej tsis sib xws, qee yam plasticity thiab yooj yim tsim thiab cov khoom semi-tiav.Nws yog ib qho tsim nyog yuav tau txais cov txheej txheem ntau lawm nrog kev ua haujlwm siab, kev sib xyaw ua haujlwm zoo thiab kev sib xyaw kom haum.
(1) Particle matching
Lub billet ( av nkos ) tuaj yeem ua rau hauv cov khoom lag luam nrog qhov siab tshaj plaws los ntawm kev xaiv cov khoom tsim nyog.Raws li txoj cai, ib qho loj me me ntawm cov ntiv tes sib txawv thiab cov ntaub ntawv sib txawv tau sim, thiab qhov ntom ntom yog zoo ib yam.Txawm li cas los xij, qhov porosity yog 38% ± 1%.Yog li ntawd, rau ib lub pob loj, nws cov tuab tuab thiab porosity muaj kev ywj siab ntawm lub pob thiab cov khoom muaj nyob hauv cov duab hexagonal nrog tus lej sib koom ua ke ntawm 8.
Cov txheej txheem theoretical stacking ntawm ib qho ntawm tib qhov loj muaj ib lub voos xwmfab, ib kab oblique, ib kab oblique sib xyaw, cov duab pyramidal, thiab tetrahedron.Cov txheej txheem stacking ntau yam ntawm tib qhov loj me yog qhia nyob rau hauv daim duab 24. Kev sib raug zoo ntawm txoj kev deposition ntawm ib qho thiab cov porosity yog qhia nyob rau hauv Table 2-26.
Txhawm rau kom cov tuab ntom ntom ntawm cov khoom siv thiab qhov sib txawv ntawm qhov sib txawv me me tau ntxiv rau qhov loj me me kom nce qhov sib xyaw ntawm tus kheej, thiab kev sib raug zoo nruab nrab ntawm lub ntim nyob los ntawm tus kheej thiab lub porosity yog qhia nyob rau hauv lub rooj.2-27.
Nrog rau cov khoom xyaw clinker, cov coarse hais yog 4. 5 hli, cov khoom nruab nrab yog 0.7 hli, cov khoom zoo yog 0.09 hli, thiab qhov kev hloov ntawm clinker porosity ntawm clinker yog qhia hauv daim duab 2-5.
Los ntawm daim duab 2-5, cov hmoov coarse yog 55% ~ 65%, cov khoom nruab nrab yog 10% ~ 30%, thiab cov hmoov zoo yog 15% ~ 30%.Qhov pom meej porosity tuaj yeem txo mus rau 15.5%.Tau kawg, cov khoom xyaw ntawm cov ntaub ntawv tshwj xeeb refractory tuaj yeem hloov kho raws li lub cev thiab cov khoom zoo ntawm cov khoom.
(2) Bonding tus neeg sawv cev rau cov khoom tshwj xeeb refractory
Nyob ntawm seb hom khoom tshwj xeeb refractory thiab txoj kev molding, cov binders uas tuaj yeem siv tau yog:
(1) Grouting method, gum arabic, polyvinyl butyral, hydrazine methyl cellulose, sodium acrylate, sodium alginate, thiab lwm yam.
(2) Txoj kev squeezing, nrog rau cov roj nplua nyeem, glycols,
Polyvinyl cawv, methyl cellulose, starch, dextrin, maltose thiab glycerin.
(3) Cov txheej txheem kub hnyiab, cov binders yog: paraffin wax, beeswax, lubricants: oleic acid, glycerin, stearic acid thiab lwm yam.
(4) Casting method, bonding agent: methyl cellulose, ethyl cellulose, cellulose acetate, polyvinyl butyral, polyvinyl cawv, acrylic;plasticizer: polyethylene glycol, dioctane Phosphoric acid, dibutyl peroxide, thiab lwm yam.;dispersing tus neeg sawv cev: 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 tuaj yeem ua kom sov phenolic resin;lubricant: stearic acid.
(6) Isostatic nias txoj kev, polyvinyl cawv, methyl cellulose, siv sulfite pulp pov tseg kua, phosphate thiab lwm yam inorganic ntsev thaum tsim pellets.
(7) Xovxwm txoj kev, methyl cellulose, dextrin, polyvinyl cawv, sulfite pulp pov tseg kua, phoov los yog ntau yam inorganic ntsev;sulfite pulp pov tseg kua, methyl cellulose, pos hniav arabic, dextrin los yog inorganic thiab inorganic acid ntsev, xws li phosphoric acid los yog phosphates.
(3) Admixtures rau cov khoom tshwj xeeb refractory
Txhawm rau txhim kho qee yam khoom ntawm cov khoom tshwj xeeb refractory, tswj cov siv lead ua daim ntawv hloov dua siab tshiab ntawm tsab xov xwm, txo qhov kub ntawm qhov hluav taws xob ntawm tsab xov xwm, thiab ntxiv ib qho me me ntawm admixture rau lub rooj tog.Cov khoom sib xyaw no feem ntau yog hlau oxides, tsis yog hlau oxides, tsis tshua muaj lub ntiaj teb hlau oxides, fluorides, borides thiab phosphates.Piv txwv li, ntxiv 1% ~ 3% boric acid (H2BO3) rau γ-Al2O3 tuaj yeem txhawb kev hloov pauv.Qhov sib ntxiv ntawm 1% mus rau 2% TiO2 rau Al2O3 tuaj yeem txo qhov kub thiab txias (txog 1600 ° C).Qhov sib ntxiv ntawm TiO2, Al2O3, ZiO2, thiab V2O5 rau MgO txhawb kev loj hlob ntawm cov nplej cristobalite thiab txo qhov kub ntawm cov khoom.Ntxiv CaO, MgO, Y2O3 thiab lwm yam khoom siv ntxiv rau ZrO2 raw khoom tuaj yeem ua rau hauv cubic zirconia cov kua uas ruaj khov los ntawm chav tsev kub txog 2000 ° C tom qab kev kho kub kub.
(4) Cov txheej txheem thiab cov khoom siv sib xyaw
Kev sib xyaw qhuav
Lub inclined muaj zog countercurrent tov khoom tsim los ntawm Shandong Konyle muaj ib tug ntim ntawm 0.05 ~ 30m3, haum rau tov ntau yam hmoov, granules, flakes thiab tsawg-viscosity cov ntaub ntawv, thiab yog txawm peem rau nrog ib tug ua kua ntxiv thiab tshuaj tsuag.
2. Kev sib xyaw ntub dej
Hauv cov txheej txheem ntub dej sib xyaw ua ke, cov khoom xyaw ntawm ntau yam khoom siv raw yog muab tso rau hauv lub ntiaj teb sib tov uas nruab nrog cov kab tiv thaiv rau kev sib tsoo zoo.Tom qab cov slurry yog tsim, ib tug plasticizer thiab lwm yam admixtures yog ntxiv los kho cov av nkos ceev, thiab cov sib tov yog meej tov nyob rau hauv ib tug ntsug ncej planetary av nkos tov, thiab granulated thiab qhuav nyob rau hauv ib tug spray granulation tshuab ziab khaub ncaws.
Planetary mixer
3. Yas compounding txoj kev
Txhawm rau tsim cov txheej txheem ntau yam sib xyaw ua ke rau cov khoom tshwj xeeb refractory dawb paug haum rau kev tsim cov yas los yog sludge forming.Nyob rau hauv txoj kev no, ntau yam raw khoom, additives, plasticizers, thiab lubricants thiab dej yog kom huv si tov nyob rau hauv ib tug planetary tov khoom, thiab ces sib tov thiab tov nyob rau hauv ib tug high-efficiency intensive tov khoom kom tshem tawm npuas nyob rau hauv cov av nkos.Txhawm rau txhim kho cov yas ntawm cov av nkos, cov av nkos yog tov nrog cov khoom siv stale, thiab cov av nkos raug rau qhov sib xyaw thib ob ntawm lub tshuab av nplaum ua ntej molding.Koneile tsim cov tshuab ua haujlwm siab thiab muaj zog sib xyaw raws li qhia hauv qab no:
Kev sib xyaw ua kom muaj zog thiab muaj zog
Countercurrent tov khoom
4. Semi-qhuav nws txoj kev
Haum rau kev sib xyaw nrog cov dej noo qis.Kev siv cov txheej txheem ib nrab qhuav yog xav tau rau cov khoom tshwj xeeb refractory uas yog tshuab tsim los ntawm cov khoom xyaw granular (coarse, nruab nrab thiab nplua peb-theem cov khoom xyaw).Cov khoom xyaw yog nqa tawm nyob rau hauv ib tug xuab zeb tov khoom, ib tug ntub zeb, ib tug planetary tov khoom los yog ib tug yuam mixer.
Cov txheej txheem sib tov yog ua ntej qhuav sib tov ntau qib ntawm granules, ntxiv cov kua dej aqueous uas muaj cov binder (inorganic lossis organic), thiab ntxiv cov hmoov zoo sib xyaw (xws li kev pabcuam combustion, expansion agent, thiab lwm yam additives).Tus neeg sawv cev) sib xyaw kom zoo.Lub sijhawm sib xyaw dav dav yog 20 ~ 30min.Cov av nkos sib xyaw yuav tsum tiv thaiv kev sib cais me me thiab cov dej yuav tsum sib npaug.Yog tias tsim nyog, cov khoom siv av nkos yuav tsum raug kaw kom zoo thaum lub sij hawm molding.
Cov dej noo ntawm cov xovxwm-tsim av nkos yog tswj ntawm 2.5% mus rau 4%;cov dej noo ntawm cov av nkos molded khoom yog tswj ntawm 4.5% mus rau 6.5%;thiab cov dej noo ntawm cov khoom vibrating molded yog tswj ntawm 6% mus rau 8%.
(1) Kev ua tau zoo ntawm CMP series ntawm lub zog txuag hluav taws xob sib xyaw ua los ntawm Kone.
(2) Kev ua tau zoo ntawm cov xuab zeb ntub dej
5. Txoj kev sib tov av nkos
Txoj kev sib tov av nkos yog rau kev tsim cov khoom tshwj xeeb refractory ceramic, tshwj xeeb tshaj yog cov av slurry rau gypsum txhaj tshuaj molding, casting molding thiab txhaj tshuaj molding.Cov txheej txheem ntawm kev ua haujlwm yog sib tov ntau yam khoom siv raw, cov khoom siv txhawb zog, cov neeg ua haujlwm tshem tawm, cov khoom sib xyaw thiab 30% mus rau 40% ntawm cov dej huv rau hauv lub pob zeb (sib tov zeb) nrog rau hauv ob sab phlu, thiab sib tov thiab zom tom qab qee lub sij hawm. sij hawm., ua rau hauv av slurry rau molding.Nyob rau hauv tus txheej txheem ntawm ua av nkos, nws yog tsim nyog los tswj qhov ceev thiab pH ntawm cov av nkos raws li cov khoom yam ntxwv thiab cov yuav tsum tau ntawm cov av nkos casting nws tus kheej.
Countercurrent haib tov khoom
Cov khoom siv tseem ceeb siv hauv cov av nkos sib xyaw yog lub pob zeb, lub tshuab cua compressor, tshem tawm cov hlau ntub dej, lub twj tso kua mis av, lub tshuab nqus tsev deaerator, thiab lwm yam.
6. Kev sib xyaw cua sov
Paraffin thiab resin-raws li binders yog cov khoom muaj zog (los yog khov) ntawm qhov kub thiab txias, thiab tsis tuaj yeem sib xyaw ntawm chav tsev kub, thiab yuav tsum tau rhaub thiab sib tov.
Paraffin yog siv los ua ib daim ntawv khi thaum siv cov txheej txheem kub tuag casting.Vim hais tias lub melting point ntawm paraffin wax yog 60 ~ 80 ° C, paraffin wax yog rhuab mus rau saum toj 100 ° C nyob rau hauv lub mixing thiab muaj fluidity zoo.Tom qab ntawd cov hmoov zoo raw khoom yog ntxiv rau cov kua paraffin, thiab tom qab tag nrho sib tov thiab sib tov, cov khoom yog npaj.Lub ncuav mog qab zib yog tsim los ntawm kub tuag casting.
Lub ntsiab sib tov khoom rau cua sov cov sib tov yog ib tug rhuab agitator.
Post lub sij hawm: Oct-20-2018