The experiment to substitute slag-stopping ball with slag-stopping awl to stop slag in tapping is conducted with effective hits percentage raised from 71.43 to 91.43 and stopped slag amount reduced from 59mm to 41.25mm.

• 对转炉使用挡渣锥代替挡渣球挡渣出钢进行了试验；挡渣有效命中率可由原来的71.；43%25提高到91