摘要
以3～1mm、<1mm、<0.088mm的电熔镁砂和<0.15mm的鳞片石墨为原料,热固性酚醛树脂和固体沥青粉为结合剂,制备了无添加剂和加入2%含碳TiN的两种镁碳砖试样。抗渣侵蚀试验结果表明:添加TiN的试样的抗渣性明显好于无添加剂的试样。TiN提高镁碳砖抗渣侵蚀性的主要原因是:反应层中TiN的氧化产物TiO2与渣中的CaO反应生成熔点1970℃的CaTiO3;脱碳层中TiN氧化后形成的TiO2与C、CaO、MgO反应生成CaTiO3、2MgO.TiO2、TiC、Ti(C,N)固溶体等高熔点矿物相,增加了渣的粘度,减轻了渣的渗透,从而提高了镁碳砖的抗渣侵蚀性。
Two kinds of magnesia-carbon specimens were prepared by using fused magnesia （3-~ 1 mm, 〈 1 mm and 〈 0. 088 mm） and flaky graphite （ 〈 0. 15 mm） as starting materials, thermosetting phenolic resin as biner. One specimen contained TiN of 2% as additive, the other not. The results of slag resistance test show that the slag resistance of the specimen with TiN is better than the specimen without additive. The obvious improvement of slag resistance of MgO-C brick with TiN has two reasons： TiO2 is generated by TiN oxidation; in reation zone, TiO2 reacts with CaO in slag to form CaTiO3 ; In decarbonised zone, TiO2 reacts with C, CaO, MgO to form CaTiO3, 2MgO · TiO2, TiC, Ti （ C, N） of high melting point to increase the viscosity of the slag and decrease the penetration of the molten slag, so improve the slag resistance of MgO-C brick.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2008年第5期1044-1047,共4页
Bulletin of the Chinese Ceramic Society
关键词
氮化钛
镁碳砖
Ti(C
N)固溶体
抗渣侵蚀性
添加剂
titanium nitride
magnesia-carbon brick
Ti （ C, N） solid solution
slag resistance
additive
