【摘要】 以清洁、碳中性、高活性、可再生的生物质作为还原剂，通过密封性气塞限制热解产物的逃逸，对海砂矿内配生物质直接还原行为进行了研究，研究表明，限制生物质热解产生热解产物（CO、H₂、CO₂、H₂O、Cx Hy Oz）的逃逸，在反应罐内迅速形成了60 kPa的压力，有利于H₂、CO的参与还原。其中焦油具有更高的活性，且保障了后期H₂的来源，促进了海砂矿的低温快速还原。在还原温度1 120℃、还原80 min的条件下，可获得金属化率为97.81%、铁回收率为97.81%的铁粉，以及TiO₂回收率为69.98%和V₂O₅回收率59.93%的富钛渣。更多还原

【Abstract】 Using clean, carbon neutral, highly reactive and renewable biomass as a reducing agent, limiting the escape of pyrolysis products by hermetic gas plugs, the direct reduction behavior of the biomass allotted within the iron sand was studied. The results show that a pressure of 60 kPa is rapidly developed in the reaction tank as a result of limiting the escape of pyrolysis products（CO、H₂、CO₂、H₂O 、Cx Hy Oz） from biomass pyrolysis, which facilitates the participation of H₂, CO in the reduction. The tar has higher activity and guarantees the source of H₂ in the later stage, which promotes the rapid reduction of iron sand at low temperature. Under the conditions of reduction temperature of 1 120 °C and reduction for 80 min, the iron powder with 97.81% metallization and 97.81% Fe recovery can be obtained, as well as the titanium-rich slag with a TiO₂ recovery of 69.98% and a V₂O₅ recovery of 59.93%.更多还原