Analysis of the Influence of Biomass Addition in Coal Mixture for Metallurgical Coke Production

A. Campos, P. Assis
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Abstract

Metallurgical coke is a common material used for hot metal production in blast furnaces. In addition to the fuel function, it has a physical assignment, supporting the load inside the reactor, and chemical, supplying carbon to hot metal. However, due to growing discourse on environmental issues, the production of hot metal via coke blast furnace has been in evidence. This process is responsible for about 70% of CO2 emissions in steelmaking. On the other hand, biomasses are materials that are available in different ways in nature and considered neutral in CO2 emissions since they absorb this gas and release oxygen in the photosynthesis process. Thus, a viable alternative in the short term is the partial replacement of the coal used in coke production with biomass, which would generate environmental gains, and guarantee the sustainable production. Therefore, this work aims to show several published researches using biomass in coke production. The effects that biomass has on the properties of coke will be emphasized, and at the end, an environmental analysis will be shown with the possible use of biomass. It will be possible to see that it is possible to substitute between 2 and 10% of the coal for biomass, producing coke with the characteristics required in the blast furnace.
生物质添加对炼焦混合煤的影响分析
冶金焦是高炉生产铁水的常用材料。除了燃料功能外,它还有物理任务,支持反应堆内的负荷,以及化学任务,为热金属提供碳。然而,由于对环境问题的讨论越来越多,通过焦炭鼓风炉生产铁水已经成为现实。在炼钢过程中,这一过程产生的二氧化碳约占二氧化碳排放量的70%。另一方面,生物质是自然界中以不同方式获得的材料,由于它们在光合作用过程中吸收这种气体并释放氧气,因此被认为是二氧化碳排放中的中性物质。因此,短期内可行的替代方案是用生物质部分替代焦炭生产中使用的煤炭,这将产生环境效益,并保证可持续生产。因此,本工作旨在展示一些已发表的利用生物质生产焦炭的研究。将强调生物质对焦炭性质的影响,最后,将对生物质的可能使用进行环境分析。将有可能看到,有可能用2 - 10%的煤代替生物质,生产出具有高炉所需特性的焦炭。
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