Life cycle assessment of niobium: A mining and production case study in Brazil
Life cycle assessment of niobium: A mining and production case study in Brazil
复制标题
铌的生命周期评估：巴西采矿和生产案例研究
DOI：
10.1016/j.mineng.2018.11.041
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发表时间：
2019
影响因子：
4.8
通讯作者：
A. R. Coutinho
中科院分区：
文献类型：
--
作者：
A. R. Alves;A. R. Coutinho
近几十年来，环境问题和对可持续发展的重视导致更有效地利用自然资源和减少工业废物的产生和排放的压力越来越大。因此，对Nb的勘探和加工一直是冶金行业关注的焦点。1970年开始在高温热处理中使用Nb作为高温合金。近年来，Nb在微合金钢、高温合金、薄膜、医用植入物、钛和铝合金、超导体和铜合金以及电解和陶瓷电容器等不同用途的应用稳步增加。在这项研究中，使用生命周期评估工具开发了一张图表，并将其作为企业生命周期评价的模型。为此，使用LCA工具绘制了含Nb矿石的选矿过程图，并对成品和固体、液体和气态废物的质量平衡进行了量化。数据表明，含Nb 2.5%的100 t矿石产生2200 kg FeNb和300 kg Nb2O5，选矿对环境造成破坏。此外，在冶金工业中，Nb的使用对于促进许多科学技术领域的发展是必不可少的。
In recent decades, environmental issues and the emphasis on sustainable development has resulted in increasing pressure to use natural resources more efficiently and reduce the generation and emission of industrial waste. Therefore, the metallurgical industry has focused on the exploration and processing of Niobium (Nb). The use of Nb in heat treatments at high temperatures as superalloys began in 1970. During recent years, the application of Nb for different uses, such as micro-alloyed steels, superalloys, thin films, medical implants, titanium and aluminium alloys, superconductors and copper alloys, and electrolytic and ceramic capacitors, has increased steadily. In this study, life cycle assessment tools were used to develop a diagrams which as proposed as a model for the LCA of Nb. For this propose, LCA tools were used to develop diagram of the beneficiation process of ore containing Nb, and quantify the mass balance with respect to the finished products and solid, liquid, and gaseous waste. The data showed that 2200 kg of FeNb and 300 kg of Nb2O5were produced from 100 t of ore containing 2.5% of Nb, and that ore beneficiation damages the environment. Moreover, the use of Nb is essential in the metallurgical industry for the advancement of numerous fields in science and technology.