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Effect of Coal and Coke Ash on Blast Furnace Slag Properties: A Comparison Between Pulverized Coal, Charcoal, Fossil-Based Coke, and Biocoke
Steel Research International ( IF 1.9 ) Pub Date : 2021-05-13 , DOI: 10.1002/srin.202100188 Anne Heikkilä 1 , Mikko Iljana 1 , Eetu-Pekka Heikkinen 1 , Aki Koskela 1 , Timo Fabritius 1
Steel Research International ( IF 1.9 ) Pub Date : 2021-05-13 , DOI: 10.1002/srin.202100188 Anne Heikkilä 1 , Mikko Iljana 1 , Eetu-Pekka Heikkinen 1 , Aki Koskela 1 , Timo Fabritius 1
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Blast furnace (BF) is the most used equipment for production of iron in the world. It is charged mainly with metallurgical coke and ferrous materials. When descending inside the BF, iron-bearing materials start reducing and melting with other burden materials. This melting leads to the formation of so-called primary slags from which the final slag is formed as materials descend inside the furnace. Each charge material has a unique effect on the total composition of the BF slag. Herein, the parts of the slag, which originate from ash of metallurgical coke and pulverized coal, and changes in the final slag compositions and properties are focused on. The global trend is to decrease the use of fossil-based carbon by replacing it with bio-based coal. Ash from coke and pulverized coal eventually dissolve in the final slag, affecting its properties. The purpose herein is to evaluate how BF slag composition changes when fossil-based coke is replaced with biocoke and pulverized coal is replaced with charcoal. Based on mass balance calculations, these replacements have both increasing and decreasing effects on solidus and liquidus temperatures, viscosity, and CaO/SiO2 and MgO/Al2O3 ratios depending on the used replacement materials.
中文翻译：
煤和焦炭灰对高炉渣性能的影响：煤粉、木炭、化石焦和生物焦的比较
高炉（BF）是世界上最常用的炼铁设备。主要装填冶金焦和黑色金属。当在高炉内下降时，含铁材料开始与其他炉料一起还原和熔化。这种熔化导致形成所谓的初级熔渣，随着材料在炉内下降，最终熔渣由初级熔渣形成。每种炉料对高炉渣的总成分都有独特的影响。本文重点关注来源于冶金焦灰分和煤粉的炉渣部分，以及最终炉渣成分和性质的变化。全球趋势是通过用生物基煤代替化石基碳来减少化石基碳的使用。来自焦炭和煤粉的灰最终溶解在最终的炉渣中，影响其性质。本文的目的是评估当化石焦炭被生物焦替代和粉煤被木炭替代时高炉渣成分的变化。根据质量平衡计算，这些替代物对固相线和液相线温度、粘度和 CaO/SiO 有增加和减少的影响2和 MgO/Al 2 O 3的比例取决于使用的替代材料。
更新日期：2021-05-13
中文翻译：
煤和焦炭灰对高炉渣性能的影响：煤粉、木炭、化石焦和生物焦的比较
高炉（BF）是世界上最常用的炼铁设备。主要装填冶金焦和黑色金属。当在高炉内下降时，含铁材料开始与其他炉料一起还原和熔化。这种熔化导致形成所谓的初级熔渣，随着材料在炉内下降，最终熔渣由初级熔渣形成。每种炉料对高炉渣的总成分都有独特的影响。本文重点关注来源于冶金焦灰分和煤粉的炉渣部分，以及最终炉渣成分和性质的变化。全球趋势是通过用生物基煤代替化石基碳来减少化石基碳的使用。来自焦炭和煤粉的灰最终溶解在最终的炉渣中，影响其性质。本文的目的是评估当化石焦炭被生物焦替代和粉煤被木炭替代时高炉渣成分的变化。根据质量平衡计算，这些替代物对固相线和液相线温度、粘度和 CaO/SiO 有增加和减少的影响2和 MgO/Al 2 O 3的比例取决于使用的替代材料。
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