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

页码：31 / +

页数：2

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