和从含高的钢铁工业渣中分两阶段浸出
Maria Kokko1, Toni Kauppinen1,2, Tao Hu1
1Research Unit of Sustainable Chemistry, University of Oulu, Oulu, Finland.
Environmental technology
|February 13, 2024
概括
这项研究引入了一种环保的,两阶段的浸工艺,用于从基本氧炉中回收和. 该方法使用低温,并使液循环利用,提高了废渣利用率.
科学领域:
- 金工程 金工程 金工程
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- (V) 对工业至关重要,但通过烤和浸进行传统的回收是能源密集的.
- 基本氧炉 (BOF) 渣含有 (Ca),阻碍了 (V) 泄漏.
- 现有的方法往往在V度低和废渣利用率低的情况下扎.
研究的目的:
- 开发一种新的,环保的两阶段浸工艺,用于同时从BOF渣中回收Ca和V.
- 在特定条件下调查出Ca和V的效率和选择性.
- 通过加强废渣利用和使液回收利用,促进循环经济原则.
主要方法:
- 设计了一种两阶段的漏过程:首先,使用酸和酸溶液漏Ca.
- 其次,使用碳酸 ((NH4) 2CO3) 溶液从残留物中洗V.
- 优化的参数包括温度,时间,溶液度和液体与固体 (L/S) 的比率.
主要成果:
- 第一个阶段在20分钟内在40°C下达到71%的Ca漏效率,对Ca的选择性>99%.
- 第二阶段在优化条件下 (L/S 8,200 g/L (NH4) 2CO3,60°C,60分钟) 实现了50%的V洗效率,对V的选择性>88%.
- 该过程表明了具有低V度的侧流的潜力,尽管需要进一步优化.
结论:
- 开发的两阶段浸工艺为从BOF渣中回收V和Ca提供了一种节能和环保的替代方案.
- 该方法与循环经济原则保持一致,通过增加废渣利用率并允许液回收利用.
- 建议进行进一步的研究,以提高该过程的整体有效性和可扩展性.
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