DRI is a process not unique to APG. In fact they refer to their process as Austpac DRI. Wikipedia has a good introduction to DRI as a process and it seems that it is being used by a number of steel companies around the world. The Austpac DRI process seems particularly suited to recycling mill waste and apparently produces a particularly high quality, pure form of iron.
dri mentioned in shale gas article, page-3
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