高炉喷吹生物炭研究进展

Injection of biochar into blast furnace:Progress and prospects

高炉喷煤可以降低焦比,但同时加剧温室效应和环境污染。近年来人们开始探索可以替代煤粉的新型燃料,如生物炭、兰炭、城市有机废物等,其中生物质因其来源丰富、环境友好而受到广泛关注。生物炭中的碳含量与煤相近,具备替代煤粉用于高炉喷吹的基本条件。对高炉喷煤技术、生物炭的制备和高炉喷吹生物炭的国内外现状进行了论述,并将生物炭的理化性质、热值、燃烧特性等指标与煤粉进行了对比,分析了生物炭替代煤粉用于高炉喷吹的技术可行性,并对下一步实施高炉喷吹生物炭进行展望。

Coal injection into blast furnace can reduce the coke ratio, but at the same time aggravate the greenhouse gas emission and other environmental pollution problems. In recent years, new fuels replacing pulverized coal injection(PCI), such as blue charcoal, biochar, and urban organic wastes(waste plastics, waste tires, etc.) have been explored. Among them, biomass has received extensive attention because of its rich source and environmental friendliness. The carbon content in biochar is similar to that of coal, and it has the basic conditions to replace pulverized coal for blast furnace injection. The background technology of fuel injection into blast furnace was discussed, while focusing on the preparation of biochar, and the current status of biochar injection into blast furnace. The physical and chemical properties, calorific value, combustion characteristics of biochar were compared with coal. The feasibility of replacing PCI with pulverized biochar injection(PBI) in blast furnace, and prospects of PBI in blast furnace iron making were analyzed.