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及时开启出钢口及稳定出钢时间对平炉的钢种,质量及冶炼时间均有重大影响。包钢炼钢厂为500吨固定式平炉,投产以来一直使用磷0.4～0.7％的铁水炼钢,受钢材性能要求的影响,镇静钢比例要求高,且为中、高碳钢,所以对出钢口开启更为重要。过去有因打出钢口时间长而改钢、降级者。个别炉次还造成全炉低温钢及号外钢。六十年代我们从国外资料看到国外使用定向爆破开启出钢口,七十年代初从国外考察报告中证实加拿大希尔顿钢厂500吨平炉使用定向爆破开启出钢口,后鞍钢、武钢相继进行了
Timely opening the tapping hole and stabilizing tapping time have a significant impact on the type, quality and smelting time of the open hearth furnace. Baotou Steel Mill is a 500-ton fixed open hearth. Since its commencement, it has been using molten iron with 0.4-0.7% phosphor steel to make steel. Due to the requirements of steel performance, the proportion of calf steel is high and it is medium and high carbon steel. Open the mouth more important. In the past there was a change of steel for a long time and a downgrade. Individual furnace also caused the furnace low temperature steel and the number outside the steel. In the 1960s, we saw from foreign sources that directional blasting was used abroad to open the tapping hole. In the early 1970s, it was confirmed from a foreign inspection report that a directional blasting of a 500-ton open hearth at a Canadian steel plant in Canada opened the tapping hole. After that, Anshan Iron and Steel Co.,