本发明涉及球团氧化焙烧‑纯氢还原冷却系统和方法，属于竖炉还原领域，解决现有技术氢气利用率低问题。包括自上而下依次连通设置的加热焙烧段、调温段、等压段和还原冷却段；加热焙烧段设置生球团入口、热烟气入口和烟气出口，调温段设置过热蒸汽入口，过热蒸汽入口的过热蒸汽通过调温段进入加热焙烧段，生球团入口的生球团与热烟气入口的热烟气和调温段过热蒸汽的混合物接触，接触后的烟气从烟气出口排出，氧化球团进入调温段，与过热蒸汽入口的过热蒸汽接触调温，调温后的氧化球团进入等压段等压过渡后进入还原冷却段；还原冷却段设置氢气入口和气体出口，氧化球团与氢气在还原冷却段还原冷却，产生的气体从气体出口排出。氢气利用率提高。

The present invention relates to a pellet oxidation roasting pure hydrogen reduction cooling system and method, belonging to the field of shaft furnace reduction, and solving the problem of low hydrogen utilization rate in the prior art. Including heating and roasting sections, temperature regulating sections, isobaric sections, and reduction cooling sections that are sequentially connected from top to bottom; The heating roasting section is equipped with a raw pellet inlet, a hot flue gas inlet, and a flue gas outlet. The temperature regulating section is equipped with an superheated steam inlet. The superheated steam at the superheated steam inlet enters the heating roasting section through the temperature regulating section. The raw pellets at the raw pellet inlet come into contact with a mixture of the hot flue gas at the hot flue gas inlet and the superheated steam at the temperature regulating section. The contacted flue gas is discharged from the flue gas outlet, and the oxidized pellets enter the temperature regulating section, Contact the superheated steam at the inlet of the superheated steam for temperature regulation, and the oxidized pellets after temperature regulation enter the isobaric transition section before entering the reduction cooling section; The reduction cooling section is equipped with hydrogen inlet and gas outlet. The oxidized pellets and hydrogen are reduced and cooled in the reduction cooling section, and the generated gas is discharged from the gas outlet. Improved hydrogen utilization rate.