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ZHL0627(金币+10, 翻译EPI+1): 2010-04-13 18:54
ZHL0627(金币+10):谢谢 2010-04-14 20:15
With the increasing demand for phosphorus ore, the utilization of poor phosphorus rocck and the purification of crude phosphoric acid have drawn extensive attention in recent years. At present,  there are two kinds of preparation methods for industrial production phosphoric acid, namely, thermal process and wet process.
  For thermal process, in the first instance, phosphorus is  produced by reduction of phosphate rock, followed by oxidation and hydration so as to produce the phosphoric acid. While, for wet process, phosphate rock
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