Hauv cov xuab zeb casting, ntau tshaj 95% siv silica xuab zeb. Qhov zoo tshaj plaws ntawm silica xuab zeb yog qhov pheej yig thiab yooj yim kom tau. Txawm li cas los xij, qhov tsis zoo ntawm silica xuab zeb kuj pom tseeb, xws li tsis zoo thermal stability, thawj theem kev hloov pauv tshwm sim ntawm li 570 ° C, siab thermal expansion tus nqi, yooj yim tawg, thiab cov plua plav tawm los ntawm kev tawg yog qhov teeb meem rau tib neeg kev noj qab haus huv. . Nyob rau tib lub sijhawm, nrog txoj kev loj hlob sai ntawm kev lag luam, silica xuab zeb tau siv dav hauv kev tsim kho kev lag luam, iav kev lag luam, ceramics thiab lwm yam lag luam. Muaj qhov tsis muaj qhov zoo thiab ruaj khov silica xuab zeb. Nrhiav nws cov kev hloov pauv yog qhov teeb meem ceev rau tag nrho lub ntiaj teb.
Niaj hnub no cia peb tham txog qhov sib txawv ntawm qee cov xuab zeb nyoos hauv kev lag luam foundry, raws li pab pawg sndfoundry ntau xyoo dhau los, kuj zoo siab tos txais cov phooj ywg ntxiv los koom nrog tham.
1.Common Raw Sands hauv Foundry
1.1 Ntuj xuab zeb
Ntuj xuab zeb, uas yog los ntawm cov xwm, xws li silica xuab zeb, chromite xuab zeb, zircon xuab zeb, magnesium txiv ntseej xuab zeb thiab lwm yam.
1.2 Artificial xuab zeb
Xws li Artificial silica xuab zeb, aluminium silicate series dag kheej kheej xuab zeb, thiab lwm yam.
Ntawm no peb tsuas yog qhia txog aluminium silicate series dag kheej kheej xuab zeb.
2. Aluminium silicate series dag kheej kheej xuab zeb
Aluminium silicate series dag kheej kheej xuab zeb, tseem hu ua "ceramic foundry xuab zeb", "Cerabeads", "ceramic hlaws", "ceramsite", "Synthetic spherical xuab zeb rau casting (Lub hli xuab zeb), "mullite hlaws", "siab refractoriness spherical. xuab zeb", "Ceramcast", "Super xuab zeb", thiab lwm yam., tsis muaj cov npe sib xws hauv ntiaj teb thiab cov qauv kuj txawv. (Peb hu ua ceramic xuab zeb hauv kab lus no)
Tab sis muaj peb lub ntsiab lus tib yam los txheeb xyuas lawv raws li hauv qab no:
A. Siv cov khoom siv aluminium silicate refractory (bauxite, kaolin, burnt gems, thiab lwm yam) ua raw khoom,
B. Cov xuab zeb hais yog kheej kheej tom qab melting los yog sintering;
C. Cov tshuaj muaj pes tsawg leeg suav nrog Al2O3, Si2O, Fe2O3, TiO2 thiab lwm yam oxide.
Vim muaj ntau qhov chaw tsim khoom hauv Suav teb ntawm cov xuab zeb ceramic, muaj ntau yam xim thiab nto los ntawm cov txheej txheem sib txawv thiab qhov chaw sib txawv ntawm cov khoom siv raw, thiab cov ntsiab lus sib txawv Al2O3 thiab cov khoom kub.
3. Parameters ntawm xuab zeb rau foundry
| Sthiabs | NRD/℃ | T.E.(20-1000 ℃) /% | B.D./(g/cm3) | E. | TC (W / mk) | pH |
| FCS | ≥1800 | 0.13 | 1.8-2.1 | ≤1.1 | 0.5-0.6 hli | 7.6 |
| SCS | ≥1780 | 0.15 | 1.4-1.7 Nws | ≤1.1 | 0.56 ib | 6-8 |
| Zircon | ≥1825 | 0.18 | 2.99 ib | ≤1.3 | 0.8-0.9 hli | 7.2 |
| Chromite | ≥1900 | 0.3-0.4 hli | 2.88 ib | ≥1.3 | 0.65 ib | 7.8 ib |
| Olive | 1840 | 0.3-0.5 hli | 1.68 ib | ≥1.3 | 0.48 ib | 9.3 |
| Silica | 1730 ib | 1.5 | 1.58 ib | ≥1.5 | 0.49 ib | 8.2 |
Lus Cim: Lub Hoobkas sib txawv thiab qhov chaw xuab zeb, cov ntaub ntawv yuav muaj qee qhov sib txawv.
Ntawm no tsuas yog cov ntaub ntawv ntau.
3.1 Chilling yam ntxwv
Raws li cov txheej txheem chilling muaj peev xwm, lub peev xwm chilling ntawm cov xuab zeb yog feem ntau cuam tshuam nrog peb yam: thermal conductivity, tshwj xeeb kub muaj peev xwm, thiab muaj tseeb ceev. Hmoov tsis zoo, peb yam no txawv ntawm cov xuab zeb los ntawm cov tuam txhab sib txawv lossis cov hauv paus chiv keeb, yog li hauv txoj kev loj hlob Thaum lub sij hawm daim ntawv thov txheej txheem ntawm hnav-resistant steel castings, peb pom tias chromite xuab zeb muaj qhov zoo tshaj plaws chilling nyhuv, ceev ceev txias, thiab siab hnav-resistant. hardness, ua raws li fused ceramic xuab zeb, silica xuab zeb, thiab sintered ceramic xuab zeb. , hnav-resistant hardness ntawm casting yuav qis dua 2-4 ntsiab lus.
3.2 Collapsibility piv
Raws li daim duab saum toj no, peb hom xuab zeb khaws 4 teev nrog 1590 ℃ hauv qhov cub.
Lub sintered ceramic xuab zeb collapsibility yog qhov zoo tshaj plaws. Cov cuab yeej no kuj tau ua tiav siv hauv Aluminium casting khoom.
3.3 Lub zog sib piv ntawm cov xuab zeb pwm rau qhov chaw tsim khoom
ATnws parameters ntawm resin coated xuab zeb pwm rau foundry
| Sands | HTS (MPa) | RTS (MPa) | AP (Pa) | LE Rate (%) |
| SIB 70 | 2.1 | 7.3 | 140 | 0.08 ib |
| SIB 60 | 1.8 | 6.2 | 140 | 0.10 |
| CS 50 | 1.9 | 6.4 | 140 | 0.09 ib |
| CS40 | 1.8 | 5.9 | 140 | 0.12 |
| RSS | 2.0 | 4.8 | 120 | 1.09 Nws |
Nco tseg:
1. Cov hom resin thiab tus nqi yog tib yam, cov xuab zeb qub yog AFS65 loj, thiab cov txheej txheem tib yam.
2. CS: Ceramic xuab zeb
RSS: Roasted Silica xuab zeb
HTS: Kub tensile zog.
RTS: Room tensile zog
AP: Cua permeability
LE Rate: Liner expansion rate.
3.4 Zoo heev reclamation tus nqi ntawm ceramic xuab zeb
Thermal thiab tshuab reclamation txoj kev yog ob qho tib si zoo haum ceramic xuab zeb, vim nws 'particle lub siab zog, siab hardness, siab hnav tsis kam, ceramic xuab zeb yuav luag yog lub siab tshaj plaws regeneration sij hawm raw xuab zeb nyob rau hauv cov xuab zeb foundry lag luam. Raws li peb cov neeg siv khoom hauv tsev cov ntaub ntawv reclamation, ceramic xuab zeb tuaj yeem rov qab tau tsawg kawg 50 zaug. Nov yog qee qhov xwm txheej qhia:
Nyob rau hauv kaum xyoo tsis ntev los no, vim ceramic xuab zeb siab refractoriness, pob puab uas yuav pab txo tau resin ntxiv nyob ib ncig ntawm 30-50%, cov khoom muaj pes tsawg leeg muaj pes tsawg leeg thiab ruaj khov grain loj tis, zoo huab cua permeability, me ntsis thermal expansion thiab siab dua recycling yam ntxwv thiab lwm yam., Raws li cov khoom siv nruab nrab, nws tau dav siv rau ntau yam castings xws li cam khwb cia hlau, cam khwb cia hlau, cam khwb cia txhuas, cam khwb cia tooj liab, thiab stainless hlau. Daim ntawv thov cov txheej txheem muaj cov xuab zeb coated, Txias lub thawv xuab zeb, 3D luam ntawv xuab zeb txheej txheem, Tsis muaj ci cov xuab zeb, cov txheej txheem kev nqis peev, txheej txheem ua npuas dej, dej iav txheej txheem thiab lwm yam.
Post lub sij hawm: Jun-15-2023
