近几年,我国的炼铁生产高速发展。2002年生铁产量达到17074万吨,与钢产量超过1亿吨的1996年相比,增加了6325万吨,突出的一个特点是:所增产的生铁,6成以上是依靠技术进步,提高高炉单位炉容产量得到的,而新建和扩容所增加的产量不到4成。见表1。从表1可以看出,6年间生铁产量增加5 In recent years, China’s iron-making production has developed rapidly. In 2002, the output of pig iron reached 170.74 million tons, an increase of 63.25 million tons compared with that of 1996 with a steel output of over 100 million tons. One of the outstanding features is that the pig iron production increased by 60% or more depending on technological progress and improvement of blast furnace units The capacity of the furnace was obtained, while the newly built and expanded capacity increased by less than 40%. See Table 1. As can be seen from Table 1, the pig iron production increased by 5 in 6 years