鋼铁的冶炼和化学肥料的制造,长期以来,一直分属于两个生产部門。近年来,随着技术的发展,这两个部門的关系正越来越密切,一种新型的企业——鋼铁化肥联合企业正在形成。化肥生产中的困难氮肥和磷肥是两类重要的化学肥料。尽管大气中有很多氮,大地蘊藏着丰富的磷矿石,但是,要使氮气、磷矿石变成植物能吸收利用的肥料,却并不容易。 The smelting of steel and the manufacture of chemical fertilizers have long been part of two production sectors. In recent years, with the development of technology, the relationship between the two sectors is getting closer and closer, and a new type of enterprise, a steel and fertilizer joint venture, is forming. Difficulties in fertilizer production Nitrogen fertilizers and phosphate fertilizers are two important types of chemical fertilizers. Although there is a lot of nitrogen in the atmosphere, and there are abundant phosphorus ores in the earth, it is not easy to turn nitrogen and phosphate ore into fertilizers that plants can absorb and use.