NEI isn't much help in this case. I figured out two ways to obtain refined steel. First - put your steel into enrichment chamber. But hey, you need refined steel to create enrichment chamber! Second - put compressed carbon and enriched iron into metallurgic infuser. Sounds good, cause compressed carbon and metallurgic infuser are possible to create. But what about enriched iron? Well, to make it you need enriched alloy and iron dust. And how do you make iron dust? With enrichment chamber, of course.
I believe some kind of evil genius created this mod ;/