Volatilization of MgO from Ludwigite in Carbothermal Reduction-nitridation Process

被引：0
|
作者：
Liu, Ran [1 ]
Gao, Yongliang [1 ]
Wang, Xingjuan [1 ]
Lu, Qing [1 ]
Xue, Xiangxin [2 ]
机构：
[1] Hebei United Univ, Coll Met & Energy, Key Lab Adv Met, 46 Xinhua St, Tangshan 063009, Peoples R China
[2] Northeastern Univ, Sch Met & Mat, Shenyang 110004, Peoples R China
来源：
MANUFACTURING SCIENCE AND TECHNOLOGY, PTS 1-3 | 2011年 / 295-297卷
基金：
中国国家自然科学基金;
关键词：
ludwigite; carbothermal reduction-nitridation; magnesia; thermodynamic analysis;
D O I：
10.4028/www.scientific.net/AMR.295-297.31
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 degrees C to 1470 degrees 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.
引用
收藏
页码：31 / +
页数：2
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