This paper briefly describes the new shaft type scrappreheating system called UL BA developed by Japanese Nippon Steel Corporation.
文章简要介绍了日本新日铁开发的新型竖炉式废钢预热系统，即：UL-BA方式预热装置。
2
Preheatingscrap by flue gases of electric furnace is an energy-saving technology, which has been developed and applied by foreign country for a long time.
电炉烟气预热废钢是一项节能降耗的新技术，国外已开发和使用。
3
The traditional ballast starting, added high-pressure filament material suddenly without preheating, will take serious sputter and loss, and make the light turn black and scrap ahead of time.