Mukukanda jecha, vanopfuura 95% vanoshandisa silica sand. Chakanakira silika jecha ndechekuti yakachipa uye iri nyore kuwana. Nekudaro, izvo zvisiri izvo zvesilica jecha zviri pachena zvakare, senge kusasimba kwekupisa kwekupisa, danho rekutanga shanduko rinoitika panenge 570 ° C, yakakwira yekuwedzera kupisa kwekuwedzera, nyore kuputsika, uye guruva rinogadzirwa nekuputsika rinokuvadza zvakanyanya kuhutano hwevanhu. . Panguva imwecheteyo, nekukurumidza kukura kwehupfumi, silica jecha rinoshandiswa zvakanyanya muindasitiri yekuvaka, indasitiri yegirazi, ceramics uye mamwe maindasitiri. Pane kushomeka kwejecha resilika remhando yepamusoro uye rakagadzikana. Kutsvaga vanotsiva idambudziko rekukurumidzira pasirese.
Nhasi ngatitaurei nezve mutsauko wemamwe majecha akajairwa mubhizinesi rekutanga, maererano nesndfoundry timu makore mazhinji zviitiko, gamuchirawo shamwari dzakawanda kuti dzijoine hurukuro.
1.Yakajairwa Raw Sands muFoundry
1.1 Jecha rezvisikwa
Jecha rechisikigo, iro rinobva kune zvakasikwa, senge silica jecha, chromite jecha, zircon jecha, magnesium olive jecha nezvimwe.
1.2 Jecha rekugadzira
Zvakadai seArtificial silica jecha, aluminium silicate akateedzera artificial spherical jecha, nezvimwe.
Pano isu tinonyanya kusuma iyo aluminium silicate akateedzera artificial spherical jecha.
2. Aluminium silicate series artificial spherical jecha
Aluminium silicate series artificial spherical sand, inozivikanwawo se "ceramic foundry sand", "Cerabeads", "ceramic beads", "ceramsite", "Synthetic spherical jecha rekukanda (jecha reMwedzi)", "mullite beads", "high refractoriness spherical. jecha", "Ceramcast", "Super jecha", nezvimwewo, hapana mazita akafanana munyika uye zviyero zvakare zvakasiyana. (Isu tinodaidza ceramic jecha mune ino chinyorwa)
Asi pane matatu mapoinzi akafanana ekuazivisa seanotevera:
A. Kushandisa aruminiyamu silicate refractory zvinhu (bauxite, kaolin, matombo akapiswa, nezvimwewo) semidziyo,
B. Zvimedu zvejecha zvakaita denderedzwa mushure mekunyunguduka kana kunyunguduka;
C. Iyo inonyanya kuumbwa kwemakemikari inosanganisira Al2O3, Si2O, Fe2O3, TiO2 uye mamwe oxide.
Nekuda kwekuti kune akawanda anogadzira muChina ejecha receramic, kune akasiyana mavara uye pamusoro kubva kune akasiyana maitiro uye akasiyana epakutanga nzvimbo yezvakagadzirwa, uye zvakasiyana Al2O3 zvemukati uye tembiricha yekugadzira.
3. Iyo parameter yejecha ye foundry
| Suye | 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 | 7.6 |
| SCS | ≥1780 | 0.15 | 1.4-1.7 | ≤1.1 | 0.56 | 6-8 |
| Zircon | ≥1825 | 0.18 | 2.99 | ≤1.3 | 0.8-0.9 | 7.2 |
| Chromite | ≥1900 | 0.3-0.4 | 2.88 | ≥1.3 | 0.65 | 7.8 |
| Olive | 1840 | 0.3-0.5 | 1.68 | ≥1.3 | 0.48 | 9.3 |
| Silica | 1730 | 1.5 | 1.58 | ≥1.5 | 0.49 | 8.2 |
Ongorora: Yakasiyana fekitori nenzvimbo jecha, iyo data ichava nemusiyano.
Heino chete data yakajairika.
3.1 Chilling maitiro
Zvinoenderana nekutonhora kweformula, kutonhora kwejecha kunonyanya kuenderana nezvinhu zvitatu: thermal conductivity, chaiyo yekupisa huwandu, uye density yechokwadi. Nehurombo, izvi zvinhu zvitatu zvakasiyana kune jecha kubva kune vakasiyana vagadziri kana mabviro, saka mukuvandudza Panguva yekushandiswa kwesimbi isingapfekere castings, takaona kuti chromite jecha rine yakanyanya kutonhora mhedzisiro, kukurumidza kutonhora kumhanyisa, uye yakanyanya kusaga. kuoma, kuteverwa nejecha receramic rakasanganiswa, silica jecha, uye sintered ceramic jecha. , kuoma-kusagadzikana kwekuoma kwekukanda kuchave kwakaderera ne 2-4 points.
3.2 Collapsibility enzanisa
Semufananidzo uri pamusoro, marudzi matatu ejecha anochengeta maawa mana aine 1590 ℃ muchoto.
Iyo sintered ceramic jecha collapsibility ndiyo yakanyanya kunaka. Ichi chivakwa zvakare chakabudirira kushanda muAluminium yekukanda zvigadzirwa.
3.3 Kuenzaniswa kwesimba kwejecha mold for foundry
ATiye parameters resin yakavharwa jecha mold ye foundry
| Sands | HTS(MPa) | RTS(MPa) | AP(Pa) | LE Rate (%) |
| CS70 | 2.1 | 7.3 | 140 | 0.08 |
| CS60 | 1.8 | 6.2 | 140 | 0.10 |
| CS50 | 1.9 | 6.4 | 140 | 0.09 |
| CS40 | 1.8 | 5.9 | 140 | 0.12 |
| RSS | 2.0 | 4.8 | 120 | 1.09 |
Cherechedza:
1. Rudzi rwe resin uye huwandu hwakafanana, jecha rekutanga ndere AFS65 saizi, uye iwo akafanana coating mamiriro.
2. CS: Ceramic jecha
RSS: Jecha reSilica rakakangwa
HTS: Kupisa kusimba simba.
RTS: Kusimba kwekamuri
AP: Kupinda kwemhepo
LE Rate: Liner yekuwedzera mwero.
3.4 Yakanakisa kudzoreredza mwero weceramic jecha
Thermal uye muchina reclamation nzira zvose zvakanaka akakodzera Ceramic jecha, nokuda kwayo 'chimedu simba rakakwirira, yakakwirira kuoma, yakakwirira kupfeka kuramba, ceramic jecha rinenge ndiyo yepamusoro patsva nguva jecha mbishi mujecha foundry bhizinesi. Zvinoenderana nevatengi vedu vepamba reclamation data, jecha receramic rinogona kudzoserwa kanokwana makumi mashanu. Heano mamwe macases share:
Mumakore gumi achangopfuura, nekuda kwejecha receramic rakakwirira refractoriness, bhora chimiro chinogona kubatsira kuderedza resin kuwedzera kumativi 30-50%, yunifomu chinoumba kuumbwa uye yakagadzikana saizi yezviyo kuparadzirwa, yakanaka mhepo permeability, zvishoma thermal kuwedzera uye yakakwirira renewable recycling maitiro etc., sechinhu chisina kwazvakarerekera, chinoshanda zvakanyanya kune akawanda castings anosanganisira simbi yakakandwa, simbi yakakandwa, yakakanda aluminium, yakakandwa mhangura, uye simbi isina tsvina. Maitiro ekushandisa ekuwana ane Resin yakanamirwa jecha, Cold bhokisi jecha, 3D kudhinda jecha maitiro, No-bake resin jecha, Investment process, Yakarasika foam process, Mvura girazi process etc.
Nguva yekutumira: Jun-15-2023
