生产钢铁有长、短两种流程。短流程在小厂生产长产品,长流程在大厂生产平产品,根据规模与产品自然分工。建大厂投资多、周期长,建小厂比较灵活、适用,容易得到地方保护和支持,故小厂发展比较快,但两种流程将并存。按0.5 Mt/a方案(小型和线材产品),短流程比长流程节能20％,投资降低21％,定员减少20％,用地节省35％,环境污染低50％,但成本高10％。 Production of steel has a long, short two processes. Short process in the small factory to produce long products, long process in the production of flat products factory, according to the scale and the natural division of products. Large factories to build more investment, long cycle, build a small factory more flexible, applicable, easy to get local protection and support, so the development of small factories faster, but the two processes will co-exist. According to the 0.5 Mt / a solution (small and wire products), the short process saves 20% over the long process, the investment is reduced by 21%, the capacity is reduced by 20%, the land is saved by 35% and the environmental pollution is reduced by 50% but the cost is 10% higher.