Effect of α-Al2O3 Micro Powder on Performance of Porous Plug Well Block

Zhi Hui Li; Sen Wang; Jing Li; Feng Wu

doi:10.4028/www.scientific.net/AMR.422.561

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 422Effect of α-Al2O3 Micro Powder on Performance of...

Effect of α-Al2O3 Micro Powder on Performance of Porous Plug Well Block

Abstract:

In connection with broken-down mechanics of ladle porous plug well block，with tabular alundum、allitic spinel、industrial chrome oxide as the main raw material and aluminate cement and active α-Al2O3 micro powder as binder，we prepare 9 groups porous plug well block samples，for studying the species of α-Al2O3 micro powder and impact of its addition on the properties of samples．By testing room temperature flexural strength of samples、room temperature compression strength，flexural strength after sintering at 1600°C and heating for 3 hours、compression strength after burning，bulk density and apparent porosity before burning and after burning，thermal shock、high temperature bending strength and other performance indicators．The results show that，adding α-Al2O3 micro powder of multi-peak distribution in the samples，whoes granularity distributes reasonably，may have better effects of padding，and form more uniform intergranular spinel，at the same time，find that the higher the bonding strength between the grains，the higher pyknosis strength of samples，and the performance indicators are excellent．When the addition of α-Al2O3 micro powder of multi-peak distribution are 10%，compression strength of sample after burning is 132MPa，high temperature flexural strength is 14MPa，bulk density is 3.25g/cm3，and apparent porosity is 12%，also，thermal shock stability and other combination properties are the best．To meet the excellent performance that delivery needs and have higher safety factor，we may use corundum-spinel porous plug well block of longer lifespan bonding low cement．