Nta ntawmliab aluminium oxidecov khoom:
1. Tsis tshua muaj impurity ntsiab: Tsis muaj lwm yam khoom pab ntxiv thaum lub sij hawm tsim cov txheej txheem los xyuas kom meej qhov zoo tshaj plaws ntsuas ntawm sodium tsawg, tsis tshua muaj poov tshuaj thiab tsawg calcium ntawm liab fused alumina; cov hlau impurity ntsuas yog tswj los ntawm kev xaiv tsis tshua muaj chrome ntsuab raw cov ntaub ntawv nrog hlau impurities. Na Less dua lossis sib npaug rau 0.5%, Fe, Si, Ca, K Less dua lossis sib npaug rau 0.1.
2. High bulk density: Feem ntau qhov ntom ntom ntawm liab aluminium oxide yog li 3.5g / m3, thiab qhov ntom ntom ntawm liab fused alumina tsim los ntawm Minghong Hengjin tuaj yeem ncav cuag 3.7g / m3. Lub siab bulk ntom ua rau cov khoom tsawg pores thiab siab ceev, thiab cov ntaub ntawv refractory uas ua los ntawm cov paj yeeb zoo tib yam aluminium oxide muaj zog dua thiab zoo dua stability.
3. Kev ruaj ntseg zoo: Vim tias cov hlau chromium muaj cov kev xav tau siab heev rau cov khoom siv raw, txhua batch ntawm raw cov ntaub ntawv rau paj yeeb fused alumina ntau lawm yog rov kuaj xyuas kom ruaj khov zoo ntawm txhua batch ntawm cov khoom.
Yuav hloov cov tsoos corundum los txhim kho cov nqi kev ua haujlwm:
1. Txhim kho qhov kev ua haujlwm ntawm refractory ntawm corundum khoom: Al2O3thiab Cr2O3tuaj yeem tsim ib qho kev daws teeb meem txuas ntxiv yam tsis muaj eutectic. Yog li ntawd, ntxiv Cr2O3 to high-purity corundum materials, regardless of the amount added, can improve the refractory performance of the material. The refractoriness (>1790 ℃) and load softening temperature (>1700 degree) ntawm paj yeeb aluminium oxide cib yog zoo dua li cov khoom ntawm high-purity corundum.
2. Improve the strength of corundum products: The room temperature compressive strength of high-purity corundum bricks is generally 70 to 100MPa, and the room temperature compressive strength of high-performance pink fused alumina bricks is generally >150MPa, thiab nws lub zog yog siab dua li ntawm corundum cib. Qhov no yog vim thaum lub sij hawm sintering txheej txheem, Al2O3-Cr2O3Cov tshuaj tov yog tsim los ntawm cov khoom, nruab nrab ntawm cov khoom thiab cov hmoov zoo, thiab ntawm cov hmoov zoo thiab cov hmoov zoo. Qhov kev daws teeb meem no txuas cov khoom thiab cov hmoov zoo ua ke zoo li tus choj, zoo heev txhim kho lub zog ntawm cov khoom.
3. Txhim kho lub thermal shock stability ntawm corundum khoom: Ntxiv Cr2O3rau corundum. Thaum Cr2O3cov ntsiab lus ntawm liab aluminium oxide cib yog nruab nrab ntawm 12% thiab 20%, nws cov thermal shock stability zoo dua piv nrog corundum cib; tshwj xeeb tshaj yog cov AKZ hom liab fused alumina cib tsim los ntawm kev ntxiv me me ntawm theem hloov additives, thermal shock stability zoo dua.
4. Txhim kho cov slag yaig kuj ntawm corundum khoom: Lub solubility ntawm Cr2O3hauv coal gasification slag (SiO2-CaO system) thiab ntau yam iav melts yog me dua li ntawm lwm cov ntaub ntawv oxide. Lub viscosity ntawm melt theem ntawm Cr2O3los yog cov tshuaj tiv thaiv ntawm Cr2O3nrog slag yog ntau dua li ntawm lwm yam tsawg-melting cov ntaub ntawv, uas tiv thaiv lub slag los ntawm nkag mus rau hauv lub sab hauv ntawm lub cib raws li capillary pores, tsis txhob tsim ib tug metamorphic txheej thiab ua structural peeling. Yog li ntawd, Cr2O3los yog cov khoom siv refractory muaj Cr2O3muaj kev tiv thaiv zoo rau steel slag, non-ferrous smelting slag, thee gasification slag, roj gasification slag thiab ntau yam iav melts.
Khoom siv:
Paj yeeb fused aluminatuaj yeem siv rau hauv kev lag luam uas tsis yog-ferrous smelting, kev lag luam petrochemical, iav kev lag luam, steel kev lag luam thiab ntau yam kub-kub kilns. Nws tuaj yeem siv rau castables, ramming cov ntaub ntawv thiab lwm yam amorphous refractory cov ntaub ntawv, los yog ua raw khoom rau abrasive khoom.
