烧结原燃料包括铁矿粉、煤粉、焦粉、高炉除尘灰等返回料以及熔剂。通过在钢铁企业取样，包括16种煤粉，5种焦粉，5种铁矿粉以及2种除尘灰，并化验可知烧结原燃料中N含量。从结果可知，煤粉中N含量最高，约0.7%~1.7%；其次是焦粉和高炉除尘灰，约0.3%~0.7%；铁矿粉最低，约0.1%~0.2%。

Sintering raw materials includes iron ore powder, coal powder, coke powder, blast furnace dust removal ash and other return materials and flux. Through sampling in iron and steel enterprises, including 16 kinds of coal powder, 5 kinds of coke powder, 5 kinds of iron ore powder and 2 kinds of dust removal ash, and the test shows the N content in the sintering raw fuel. From the results, it can be seen that the N content in pulverized coal is the highest, about 0.7% to 1.7%; followed by coke powder and blast furnace dust, about 0.3% to 0.7%; and iron ore powder is the lowest, about 0.1% to 0.2%.