Hiromichi, Takebe and Gaku, Shimada and Arman, Arman and Tomoya, Fukui INTERFACIAL REACTION BETWEEN MAGNESIA-CHROME REFRACTORY AND IRON SILICATE SLAG MELT. In: 14th Biennial Worldwide Congress UNITECR 2015, 15-18 September 2015, Vienna, Austria.

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Corrosion tests of magnesia-chrome refractories by molten copper smelting slag have been studied. XRD results showed that the refractory sample consisted of magnesia (MgO) and pichromite (MgCr2O4) phases. The MgCr2O4 phase may contain other impurities such as Fe and Al, detected by XRF analysis. SEM-EDX analysis revealed that the magnesia-chrome refractory sample had a microstructure of coarse pichromite grains and relatively-small mixed area consisting of fine magnesia and pichromite grains. A piece of the refractories was reacted with molten copper slag at 1250ºC up to 120 minutes in Ar atmosphere with an oxygen partial pressure of 10-3 atm. Molten slag penetrated into pore regions existing between grains. The region of coarse/fine pichromite grains had good corrosion resistance with the formation of Fe–O rich thin layer (< 10 mm in thick) on their surfaces. On the other hand, magnesia grains dissolved into the molten slag. The reaction process is discussed based on experimental data and thermodynamic analysis.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Department of Mechanical Engineering > Teknik Otomotif
Depositing User: Arman
Date Deposited: 24 Jun 2020 23:19
Last Modified: 24 Jun 2020 23:19

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