I need to decrease nitrogen gas consumption in iron & steel plant. Currently it's not possible to measure every dot from steel mill to determine real usage so they use what air separation unit sent (m3/h)..

There are some ways to do it:

  • Using air compressors instead of nitrogen lines in steel mill and blast furnace
  • Using air compressors for pneumatic & dust cleaner filters etc...

But what other ways? How to do it?

  • $\begingroup$ It sounds unusual for a steel plant to use this much nitrogen. $\endgroup$ Commented Jul 9, 2020 at 6:31
  • 1
    $\begingroup$ @user3528438 and how much is that? $\endgroup$
    – Solar Mike
    Commented Jul 9, 2020 at 8:05
  • $\begingroup$ @user3528438 why? nitrogen is useful for filters & slag splashing & dust cleaning etc. but it shouldn't require too much, so there must be ways to decrease consumption. $\endgroup$
    – chemeng10
    Commented Jul 9, 2020 at 9:33
  • $\begingroup$ Please add more details to your question. Right now it looks like you are only asking for a list of ideas. If you supplied more information, someone could help you actually solve your problem. $\endgroup$
    – hazzey
    Commented Jul 9, 2020 at 18:36

1 Answer 1


I have been in 100 steel mills and never noticed a nitrogen system. However it seems they could use inert gas blasting somewhere. And nitrogen would be so cheap and convenient because steel mills will generally have a cryogenic oxygen plant. Generally they are off site and may be owned by someone like Linde. Very simple to lay a nitrogen pipe next to the oxygen pipe and provide "free" nitrogen that would otherwise be vented into the atmosphere.


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