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首页> 外文期刊>Journal of Cleaner Production >Extraction method for valuable elements of low-grade vanadia-titania magnetite
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Extraction method for valuable elements of low-grade vanadia-titania magnetite

机译：低品位钒钛氧化物磁铁矿中有价值元素的提取方法

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摘要

The reduction performance and mechanism of low-grade vanadiaetitania magnetite (LGVTM) were investigated using stoichiometric Al powder as a reductant. Subsequently, experiments were conducted to study the effect of Al ratio on the composition and microstructure evolution of ferroalloys and recoveries of Fe, V, Ti, and Cr. It was found that the oxides of valuable elements were reduced to metals simultaneously in a thermal explosion at 940 degrees C, forming a multicomponent ferroalloy. Ti, V, and Cr contents had common regularities in the ferroalloy, which first increased and then decreased, while Fe decreased with an increase in Al ratio. The main oxide inclusion transformed from Fe2SiO4 to Al2O3 in the ferroalloy with an increasing Al ratio. The recovery of Fe increased at first and then basically was constant. The recoveries of V, Ti, and Cr first increased and then decreased with Al ratio. The optimum Al ratios are different for each element, being 1.1, 1.15, 1.0, and 0.9 for Fe, Ti, V, and Cr, respectively. The combination of Al2O3 and TiO and the formation of (Al0.948Cr0.052)(2)O-3 negatively affected the recovery of Ti and Cr, respectively. (C) 2019 Elsevier Ltd. All rights reserved.
机译：以化学计量的铝粉为还原剂，研究了低品位钒钛磁铁矿（LGVTM）的还原性能和机理。随后，进行了实验，研究了铝比对铁合金的组成和显微组织演变以及铁，钒，钛和铬的回收率的影响。发现有价值的元素的氧化物在940℃的热爆炸中同时被还原成金属，形成多组分铁合金。铁合金中的Ti，V和Cr含量具有相同的规律性，先增加然后减少，而Fe随着Al比的增加而减少。随着Al的增加，铁合金中的主要氧化物夹杂物从Fe2SiO4转变为Al2O3。铁的回收率先是增加，然后基本保持恒定。 V，Ti和Cr的回收率随Al的比例先增加后降低。每种元素的最佳Al比是不同的，Fe，Ti，V和Cr分别为1.1、1.15、1.0和0.9。 Al2O3和TiO的结合以及（Al0.948Cr0.052）（2）O-3的形成分别对Ti和Cr的回收率产生负面影响。 （C）2019 Elsevier Ltd.保留所有权利。

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