Influence of Na2CO3 on Hydration Resistance of MgO-Al-C Bricks

被引：1

作者：

Ji, Xiumei ^{[1
]}

Wei, Juncong ^{[1
]}

Huang, Jiankun ^{[1
]}

Gao, Chunhui ^{[1
]}

Tu, Junbo ^{[1
]}

机构：

[1] Hebei United Univ, Hebei Prov Key Lab Inorgan Nonmetall Mat, Tangshan 063009, Peoples R China

来源：

ADVANCES IN CHEMICAL, MATERIAL AND METALLURGICAL ENGINEERING, PTS 1-5 | 2013年 / 634-638卷

关键词：

Na2CO3; Silicon powder; MgO-Al-C Bricks; Hydration resistance;

D O I：

10.4028/www.scientific.net/AMR.634-638.2362

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

To improve the hydration resistance of MgO-Al-C bricks, Na2CO3 was chosen as an additive through thermodynamic calculation. MgO-Al-C refractories were prepared by using Si, Na2CO3 or both as additives. The effects of additives on the hydration resistance of specimens were investigated. XRD was conducted to determine the phase composition. The results showed that the hydration resistance of MgO-Al-C bricks would be improved slightly with addition of only Si due to the densification of the structure. When Na2CO3 and Si were added together, the hydration resistance would be improved remarkably. The mechanism is that Na2CO3 could decompose to give off O-2 during heating, which could promote the oxidation of Al metal and inhibit the formation of Al4C3 and AlN.

引用

页码：2362 / 2365

页数：4