Sintered ceramic jecha rekugadzira nechando chepakati bhokisi
Iyo inotonhora bhokisi nzira inoreva kuumbwa kwejecha resin inogadziriswa / kuomeswa nekufuridza mugasi kana aerosol, uye inoumbwa ipapo pamhepo tembiricha.Nzira yakajairika ndeye triethylamine nzira, inoshandisa phenolic-urethane resin uye inoomeswa nekufuridza triethylamine gasi.Hunhu hwechiitiko ichi ndeichi: jecha repakati rinogona kushandiswa kwenguva yakareba, nguva yekudhirowa ipfupi, kugona kwekugadzira kwakakwira, uye simba rekushandisa rakaderera.
Diesel engine castings, senge cylinder blocks, cylinder heads, kupinza uye kupera simba pombi, nezvimwewo, mamwe ane maumbirwo akaomarara uye diki diki diki diki-sectional nzvimbo, dzinowanzo pfuti yenhema, kuputsika, nezvimwewo, kana tsinga dzinoonekwa castings nekuda kwekuwedzera kukuru kwesilika jecha.Mukana wekuremara sejecha rinonamira nemapores zvakare wakakwira zvakati.
Uchishandisa jecha receramic kana kusanganisa jecha receramic nejecha resilica muchiyero, huwandu hweresin inowedzerwa inoderedzwa ne20-30%, uye zvikanganiso zviri pamusoro zvakavandudzwa zvakanyanya.Panguva imwecheteyo, iyo jecha core ine yakanaka collapsibility, iyo inoderedza basa rekukanda kuchenesa.Nekuda kweizvozvo, akawanda uye akawanda edhiziri ekukanda madhiri atora ceramic jecha rinotonhora bhokisi tekinoroji.
Ceramic Sand Property
| Main Chemical Component | Al₂O₃≥53%, Fe₂O₃＜4%, TiO₂＜3%, SiO₂≤37% |
| Zviyo Chimiro | Spherical |
| Angular Coefficient | ≤1.1 |
| Chikamu Saizi | 45μm -2000μm |
| Refractoriness | ≥1800℃ |
| Bulk Density | 1.5-1.6 g/cm3 |
| Kuwedzera Kwekupisa (RT-1200℃) | 4.5-6.5x10-6/k |
| Color | Jecha |
| PH | 6.6-7.3 |
| Mineralogical Composition | Mullite + Corundum |
| Acid Cost | ＜1 ml/50g |
| LOI | ＜0.1% |
Enzanisa neimwe yakasvibirira jecha bvunzo mhedzisiro yeCold box process
| Raw Sand | Resin Wedzera. | 2h Tensile Simba | Gasi Evolution |
| Sintered Ceramic Sand | 1.5% | 2.098 MPa | 10.34 ml/g |
| Jecha rakakweshwa | 1.5% | 1.105MPa | 13.4 ml/g |
| Baked Sand | 1.5% | 1.088 MPa | 12.9 ml/g |
| Sintered Ceramic Sand+ Yakakweshwa Jecha | 1.5% | 1.815 MPa | 12.5 ml/g |
| Sintered Ceramic Sand + Yakabikwa jecha | 1.5% | 1.851 MPa | 12.35 ml/g |
| Chromite Sand+ Yakakweshwa Jecha | 1.5% | 0.801 MPa | 10.85 ml/g |
| Chromite Sand+ Yakabikwa Jecha | 1.5% | 0.821 MPa | 10.74 ml/g |
Enzanisa neCasting defects rate yeCold box process
| Raw Sand | Veins | Core Broken | Sinter | Choke | Total |
| Sintered Ceramic Sand | 0% | 2% | 0% | 0 | 2% |
| Jecha rakakweshwa | 28% | 12% | 4% | 3% | 47% |
| Baked Sand | 24% | 10% | 3% | 2% | 39% |
| Sintered Ceramic Sand+ Yakakweshwa Jecha | 12% | 4% | 1% | 2% | 19% |
| Sintered Ceramic Sand + Yakabikwa jecha | 7% | 3% | 2% | 2% | 14% |
| Chromite Sand+ Yakakweshwa Jecha | 13% | 6% | 5% | 4% | 28% |
| Chromite Sand+ Yakabikwa Jecha | 12% | 4% | 2% | 2% | 20% |
Zvikamu zveParticle size Distribution
Iyo particle size yekugovera inogona kugadzirwa zvinoenderana nezvaunoda.
| Mesh | 20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 | Pan | AFS | |
| μm | 850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pan | ||
| Code | 40/70 | ≤5 | 20-30 | 40-50 | 15-25 | ≤8 | ≤1 | 43±3 | ||||
| 70/40 | ≤5 | 15-25 | 40-50 | 20-30 | ≤10 | ≤2 | 46±3 | |||||
| 50/100 | ≤5 | 25-35 | 35-50 | 15-25 | ≤6 | ≤1 | 50±3 | |||||
| 100/50 | ≤5 | 15-25 | 35-50 | 25-35 | ≤10 | ≤1 | 55±3 | |||||
| 70/140 | ≤5 | 25-35 | 35-50 | 8-15 | ≤5 | ≤1 | 65±4 | |||||
| 140/70 | ≤5 | 15-35 | 35-50 | 20-25 | ≤8 | ≤2 | 70±5 | |||||
| 100/200 | ≤10 | 20-35 | 35-50 | 15-20 | ≤10 | ≤2 | 110±5 | |||||
