By balanced calculations of mass and heat,the DAP product of specification(13-18-0) is considered available,or if the MgO content in phosphate rock decreases to 1.57% from 3.23%,DAP product of excellent specification(15-42-0) possible.

• 通过物热衡算；说明可生产(13-18-0)品级DAP；如磷矿中MgO从3.；23%25降至1