帘线钢用钢包渣线砖的研制和应用

Development and Application of the Slag Line Brick of Ladle for Refining Tire Cord Steel

针对帘线钢用钢包渣线砖不抗侵蚀、寿命低的问题以及渣线使用镁钙喷补料因喷补料MgO含量高,造成钢水中夹杂物多的问题,以大结晶镁砂为骨料,采用优质结合剂,配以多种添加剂技术,开发了新型钢包渣线砖。应用表明,新型钢包渣线砖具有良好的抗渣性、耐侵蚀性和安全性,使用寿命一次不喷补可达到10炉以上,且降低了钢中脆性夹杂物数量。

There are some problems in the slag line brick of ladle for refining tire cord steel, such as weak anti-erosion ability, low service life and high MgO content in magnesia-calcia gunning refractory, which the slag line brick must use, caused many inclusions in the steel. Using big crystal magnesia as the aggregate, adding high quality binders and combining many additive technologies, a new slag line brick was developed. Applications showed that the new slag line brick had good slag resistance, anti-etching properties and security. The service life reached 10 heats without spray repair. Refining tire cord steel in the ladle using the new slag line brick reduced significantly brittle inclusions in the steel.