Volatilization of MgO from Ludwigite in Carbothermal Reduction-Nitridation Process

Abstract:

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Based on thermodynamic analysis, the reduction and volatilization of magnesium in ludwigite were studied using carbothermal reduction-nitridation method. The experimental result show that the total mass loss rate of samples increase with temperature rising, which the maximum is 52.88 wt% in the range from 1440°C to 1470°C. Magnesia in ludwigite was reduced and volatilized as gaseous magnesium vapour in the process of carbothermal reduction, and its mass loss rate go up to 98.138%. Part of the volatilized matter formed white powder deposited at the opening of furnace tube and adhered to tube wall together with boride/silicon volatilized. It was proved that there is volatilization of MgO from ludwigite in the process of carbothermal reduction-nitridation.

Info:

Periodical:

Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu

Pages:

31-35

DOI:

10.4028/www.scientific.net/AMR.295-297.31

Citation:

R. Liu et al., "Volatilization of MgO from Ludwigite in Carbothermal Reduction-Nitridation Process", Advanced Materials Research, Vols. 295-297, pp. 31-35, 2011

Online since:

July 2011

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Price:

$35.00

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