生物质对钒钛磁铁矿还原行为影响及过程强化  

Effects of biomass on reduction of vanadium-bearing titanomagnetite and process enhancement

作　　者：黄柱成[1] 姜雄 易凌云[1] 蔡威 沈雪华 胡程飞 HUANG Zhu-cheng;JIANG Xiong;YI Ling-yun;CAI Wei;SHEN Xue-hua;HU Cheng-fei(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《钢铁》2021年第1期12-20,共9页Iron and Steel

基　　金：国家自然科学基金资助项目(51504230)。

摘　　要：为了缓解冶金行业严重的污染和温室气体排放,生物质作为清洁能源的应用迫在眉睫。从还原速率、矿物相变和铁晶粒长大等方面,对生物质和无烟煤还原钒钛磁铁矿特性进行了对比研究。结果表明,生物质具有较好的反应活性,促进了黑钛石和金红石的形成,避免了钛铁尖晶石的形成,从而提高还原速率。但由于生物质的持久性较差,还原产物金属化率较低且铁晶粒尺寸较细。以一定比例的生物质和无烟煤作为复合还原剂,既保证了还原速率和金属化率,又促进了铁晶粒的生长,达到协同作用的目的。In order to remit the severe pollution and greenhouse gas emission in the metallurgical industry,the application of biomass as clean energy is now absolutely urgent.A comparison study on reduction characteristics of VTM by biomass and anthracite reduction of VTM was carried out,referring to the reduction rate,mineral phase transformation,and iron grain growth.Results indicated that biomass improved the reduction rate of VTM due to its superior thermochemical activity.Biomass reduction facilitated the formation of anosovite and rutile rather than the ulvite phase.However,for the inferior durability of biomass,samples always showed up lower metallization degrees and finer iron grain size in the late stage of the reduction process.Compound reductant with a certain proportion of biomass and anthracite not only ensured reduction rate and metallization degree but also promoted the iron grain growth,achieving synergy purpose.

关 键 词：钛磁铁矿冶炼 生物质能 还原特性 相变 铁晶粒长大 

分 类 号：TF52[冶金工程—钢铁冶金]