Mchenga wa sintered ceramic wopangira maziko okhala ndi bokosi lozizira
Njira ya bokosi lozizira imatanthawuza kupanga mchenga wopangidwa ndi utomoni womwe umawumitsidwa / kuwumitsidwa ndi kuwuzira mu gasi kapena aerosol, ndikupangidwa nthawi yomweyo kutentha kwachipinda.Njira yodziwika bwino ndi njira ya triethylamine, yomwe imagwiritsa ntchito phenolic-urethane resin ndipo imaumitsidwa ndi kuwomba mpweya wa triethylamine.Makhalidwe a njirayi ndi awa: mchenga wapakati ukhoza kugwiritsidwa ntchito kwa nthawi yaitali, nthawi yojambula nkhungu ndi yochepa, kupanga bwino kumakhala kwakukulu, komanso kugwiritsa ntchito mphamvu kumakhala kochepa.
Ma injini a dizilo, monga ma silinda, mitu ya silinda, mapaipi olowera ndi kutulutsa, ndi zina zambiri, ena amakhala ndi mawonekedwe ovuta komanso madera ang'onoang'ono ang'onoang'ono, omwe amatha kuwomberedwa molakwika, kusweka, ndi zina zambiri. kuponyedwa chifukwa cha kukula kwakukulu kwa mchenga wa silika.Kuthekera kwa zolakwika monga mchenga womata ndi pores ndikwambiri.
Pogwiritsa ntchito mchenga wa ceramic kapena kusakaniza mchenga wa ceramic ndi mchenga wa silika molingana, kuchuluka kwa utomoni wowonjezera kumachepetsedwa ndi 20-30%, ndipo zolakwika zomwe zili pamwambazi zakhala zikuyenda bwino.Pa nthawi yomweyo, pachimake mchenga ndi collapsibility wabwino, amene amachepetsa ntchito kuponya kuyeretsa.Zotsatira zake, makina opangira ma injini a dizilo ochulukirachulukira atengera ukadaulo wamabokosi a mchenga wa ceramic.
Ceramic Sand Property
| Main Chemical Chigawo | Al₂O₃≥53%, Fe₂O₃＜4%, TiO₂＜3%, SiO₂≤37% |
| Maonekedwe a Mbewu | Chozungulira |
| Angular Coefficient | ≤1.1 |
| Kukula Kwambiri | 45μm -2000μm |
| Refractoriness | ≥1800 ℃ |
| Kuchulukana Kwambiri | 1.5-1.6 g/cm3 |
| Kukula kwa Thermal (RT-1200 ℃) | 4.5-6.5x10-6/k |
| Mtundu | Mchenga |
| PH | 6.6-7.3 |
| Mineralogical Composition | Mullite + Corundum |
| Mtengo wa Acid | 1 ml/50g |
| LOI | ＜0.1% |
Fananizani ndi zotsatira zina zoyeserera zamchenga za Cold box process
| Mchenga Waiwisi | Resin Add. | 2h Kuthamanga Kwambiri | Kusintha kwa Gasi |
| Sintered Ceramic Sand | 1.5% | 2.098 MPa | 10.34 ml / g |
| Mchenga Wotsukidwa | 1.5% | 1.105MPa | 13.4 ml / g |
| Mchenga Wophika | 1.5% | 1.088 MPa | 12.9 ml / g |
| Sintered Ceramic Sand + Scrubbed Sand | 1.5% | 1.815 MPa | 12.5 ml / g |
| Sintered Ceramic Sand + Wophika Mchenga | 1.5% | 1.851 MPa | 12.35 ml / g |
| Mchenga wa Chromite + Mchenga Wopukuta | 1.5% | 0.801 MPa | 10.85 ml / g |
| Mchenga wa Chromite + Mchenga Wophika | 1.5% | 0.821 MPa | 10.74 ml / g |
Fananizani ndi Castings defects rate of Cold box process
| Mchenga Waiwisi | Mitsempha | Core Broken | Sinter | Choka | Zonse |
| Sintered Ceramic Sand | 0% | 2% | 0% | 0 | 2% |
| Mchenga Wotsukidwa | 28% | 12% | 4% | 3% | 47% |
| Mchenga Wophika | 24% | 10% | 3% | 2% | 39% |
| Sintered Ceramic Sand + Scrubbed Sand | 12% | 4% | 1% | 2% | 19% |
| Sintered Ceramic Sand + Wophika Mchenga | 7% | 3% | 2% | 2% | 14% |
| Mchenga wa Chromite + Mchenga Wopukuta | 13% | 6% | 5% | 4% | 28% |
| Mchenga wa Chromite + Mchenga Wophika | 12% | 4% | 2% | 2% | 20% |
Magawo a Particle size Distribution
The tinthu kukula kugawa akhoza makonda malinga ndi lamulo lanu.
| Mesh | 20 | 30 | 40 | 50 | 70 | 100 | 140 | 200 | 270 | Pansi | AFS | |
| μm | 850 | 600 | 425 | 300 | 212 | 150 | 106 | 75 | 53 | Pansi | ||
| Kodi | 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 | |||||
