堕落的圣骑士在线观看完整版未删减|尖峰时刻1完整版电影在线观看|日韩中文字幕成人免费视频|日韩中文字幕组,性xxxhd,先锋影音欧美,91日本在线播放

Steel-making Plant Successfully Tested the Ladle Drainage Sand Removal Technology
  Updatetime:2013-08-26 Hits:

  The removal of drainage sand is a big technology problem for metallurgy industry and a limit on production of clean steel. During the production of steel, since the sand particals are very small and the duration staying in the tundish is very short, the drainage sand will be flushed into the hot metal and get the hot metal polluted.

  The research team of steel-making plant made the drainage sand blowing equipmen, overcomeing the high temperature, small operating space and  short operation time, and finally find the method to remove the drainage sand.

  At present, they had tested this technology during the production of tyre cord steel, bearing steel and spring steel, and the performance is remarkable.