Improved Mixing in a Magnetite Iron Ore Tank via Swirl Flow: Lab‐Scale and Full‐Scale Studies
Improved Mixing in a Magnetite Iron Ore Tank via Swirl Flow: Lab‐Scale and Full‐Scale Studies
复制标题
通过旋流改进磁铁矿铁矿石罐中的混合：实验室规模和全规模研究
DOI：
10.1002/ceat.201500442
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发表时间：
2016
影响因子：
2.1
通讯作者：
O. Eriksson
中科院分区：
文献类型：
--
作者：
Jie Wu;Steven Wang;B. Nguyen;Daniel Marjavaara;O. Eriksson
在实验室中进行了小规模研究，旨在解决磁铁矿铁矿石浆料罐中难以混合的问题。现有的位于底部附近的4叶片轴流式叶轮可以被制成提供改进的离底悬浮，并且当罐挡板被移除时，在大致相同的功率输入下显著更好地混合。为了在移除挡板后保持相同的功率输入，使用了扩大叶轮直径或增加速度。这一结果在瑞典LKAB的全尺寸浆料罐中实施，实现了更一致的混合的成功结果，这使得罐的浪涌容量增加了50%。大型全尺寸罐提供了一个评估实验室测量放大的机会。这种放大证实了实验室测量与基于使用Zwietering相关性的全尺寸观察大致一致。
Small‐scale studies were conducted in laboratories with the aim to solve a difficult mixing problem in a life magnetite iron ore slurry tank. The existing 4‐bladed axial flow impeller located close to the bottom can be made to provide improved off‐bottom suspension and dramatically better mixing at approximately same power input when the tank baffles are removed. To maintain the same power input after removal of baffles, extending the impeller diameter or increasing speed was used. This result was implemented at LKAB's full‐scale slurry tank in Sweden, achieving a successful outcome of more consistent blending, which allowed ∼ 50 % increase in the tank surge capacity. The large full‐scale tank provided an opportunity to assess scaling up from the laboratory measurements. This scale‐up confirms that laboratory measurements are in approximate agreement with full‐scale observation based on using the Zwietering correlation.