摘要
在还原温度为1200℃条件下,实验研究了高磷鲕状赤铁矿还原物料与刚玉/莫来石砖的反应及反应对砖侵蚀的影响。还原物料由高磷鲕状赤铁矿、烟煤、CaO和Na_2CO_3组成,其质量比为1∶0.15∶0.15∶0.03。结果表明,还原物料与刚玉砖反应生成大量钙黄长石及少量钙长石,物料中Fe、Na、Mg离子向反应界面迁移,使钙黄长石产物层熔点降低、抗侵蚀性能下降。还原物料与莫来石砖反应形成密实的钙长石产物层,阻碍Fe、Na、Mg离子向反应界面迁移。对于在高温状态下还原高磷鲕状赤铁矿还原物料,莫来石砖具有比刚玉砖更好的抗侵蚀性能。
The reaction between high phosphorus oolitic hematite-coal material and corundum / mullite brick and its influence on the corrosion of brick were studied under the reduction temperature of 1200 ℃.The high phosphorus oolitic hematite-coal material was composed of high phosphorus oolitic hematite,bituminous,CaO and Na_2CO_3,and its mixing mass ratio was 1∶ 0. 15∶ 0. 15∶ 0. 03. The results showed that the material reacted with corundum brick to form a large number of gehlenite and a small amount of anorthite. The Fe,Na,Mg ions from the material migrated to the reaction interface,lowing the melting point of the gehlenite product layer and degrading the corrosion resistance of corundum brick. A dense anorthite product layer was generated when the material reacted with mullite brick,hindering the Fe,Na,Mg ions migration to the reaction interface. It can be conferred that the corrosion resistance of mullite brick was better than that of corundum brick for the reduction of high phosphorus oolitic hematite-coal material.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第5期1356-1360,1366,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51134002)
关键词
高磷鲕状赤铁矿
钙黄长石
钙长石
侵蚀
high phosphorus oolitic hematite
gehlenite
anorthite
corrosion
