the big picture, page-6

Here's a better example of a use of Anthracite then I think ZYLs given, from International Ferro the company in the article earlier, higher Anthracite usage reducing their costs.

http://www.ifml.com/ifl/media_centre/press_releases/2012pr/2012-04-25/

Management actively continued to pursue operational improvements, and these have had noticeable benefits over the quarter. Reductant feed ratio optimization continued through the quarter, resulting in a further increase in anthracite usage, contributing to further reduction in cost. Furnace stability also improved, resulting in improved ore and energy efficiencies and record anthracite usage. Stable gas plant performance resulted in improvements in the fuel supply to the co-generation plant and the sinter plant. These positive effects improved co-generation output and lowered sinter production cost, which further contributed to the reduced smelting cost.