一前言小氮肥合成循环气的“氢氮比”(H_2/N_2)是一个很重要的工艺指标,但却没有一个直观的表示方法。要想知道H_2/N_2的数据,往往要通过计算,计算中通常又把氩气的含量忽略了。用这种计算方法所得到的结果,往往与真实值相差很大。实际生产中一般不考虑 A preface The “hydrogen to nitrogen ratio” (H 2 / N 2) of the synthesis of nitrogenous fertilizer by small nitrogen fertilizers is a very important process indicator, but not an intuitive method of expression. To know the H_2 / N_2 data, it is often calculated that the argon content is usually neglected in the calculation. The results obtained with this method of calculation often differ greatly from the true value. The actual production generally do not consider