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通过冷却来制造钢铁的金属化颗粒 减少:气体流速的影响
Wanlong Fan1, Zhiwei Peng1, Ran Tian1
1School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|August 29, 2024
概括
优化铁矿石颗粒的冷却减少 (HCR) 是直接钢铁制造的关键. 控制流速可以提高颗粒的减少和金属化,这对于高效的钢铁生产至关重要.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
背景情况:
- 与传统方法相比,直接钢铁制造提供了环境优势.
- 减少冷却 (HCR) 是从铁矿石生产高质量的金属化颗粒的一个有前途的途径.
研究的目的:
- 为了研究 (H2) 流速对金属化颗粒制备的影响,使用HCR.
- 确定最佳的H2流速以最大限度地减少颗粒和金属化.
主要方法:
- 铁矿石颗粒在不同的H2流速下接受了HCR.
- 测量了包括减少程度,金属化程度,减少膨胀指数 (RSI) 和压力强度 (CS) 在内的关键性能指标.
主要成果:
- 增加H2流速最初改善了减速性能,但由于扩散电阻而停滞不前.
- 由于颗粒组成和微观结构的变化,RSI与H2流速发生变化.
- 在较高的H2流速下,压力强度 (CS) 显著下降,这与透性和裂的增加有关.
- 在0.8L/分钟H2流量下达到最佳性能:91.45%的减少,84.07%的金属化,80.67%的总铁重量,4.66%的RSI和1265N/p CS.
结论:
- 气流速是HCR生产金属化颗粒的关键参数.
- 精心控制H2流速是必要的,以平衡降低,膨胀和强度直接钢铁制造应用.
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