Nitrogen is the main raw material of nitrogen fertilizer industry, such as ammonium nitrate with 36% nitrogen , ammonium sulfate n with 21% nitrogen, urea with 46.7% nitrogen. Nitrogen is also used to replace air or gas in pipelines and containers before the start of production of the nitrogen fertilizer plant or after overhaul to ensure safe operation. Lime nitrogen is a kind of chemical nitrogen fertilizer, 1 ton of lime nitrogen will consume nitrogen 300~500m3; nitrogen is mainly used for ammonia synthesis, ammonia is the main raw material of chemical fertilizer industry and basic organic chemical industry.
