首页|高炉协同处理城市废塑料及废轮胎

高炉协同处理城市废塑料及废轮胎

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随着现代社会的飞速发展,城市废塑料及废轮胎日益增多,环境污染严重.与此同时,在碳中和、碳达峰的背景下,面对能源紧张状况,绿色低碳转型,减少碳排放并提高资源利用效率是钢铁企业发展的方向.结合高炉冶炼过程,本文从废塑料、废轮胎的规模、化学成分、工业分析、热能、化学能、燃烧特性等多方面就高炉喷吹废塑料、废轮胎工艺进行了可行性研究,并基于两种废旧物的物理化学性能及燃烧机理等对高炉喷吹废塑料、废轮胎工艺提出了建议:高炉处理废旧物通常采用高炉炉顶装入等方式,而从高炉风口喷入是最佳入炉方式;高炉喷吹废旧物宜采取煤粉与废旧物混合喷吹的方式,短期内还是会以煤粉为主,废塑料和废轮胎为辅,遵循"有料即喷、无料停喷"的原则,是科学且行之有效的,易被钢铁企业所接受;高炉吨铁废旧物喷吹量宜控制在30~50 kg,随着废旧物分类技术的进步,可根据不同材质特性进行差异化喷吹;高炉喷吹废旧物的最佳粒度宜在4~8 mm,该工艺将是未来低碳冶炼的一个重要方向.
COOPERATIVE TREATMENT OF CITY WASTE PLASTICS AND TIRES WITH BLAST FURNACE
Along with the rapid development of modern society,more and more waste plastics and tires have become a serious environmental hazard.Meanwhile,in order to realize the idea of carbon neutralization and carbon peak,green and low-carbon production will become a crucial mission for iron and steel industry.A feasible study was analyzed in this paper for the waste plastics and tires injection into blast furnace,including annual recycling amount,chemical composition,industrial analysis,thermal energy,chemical energy and combustion characteristics.Several parameter suggestions were figured out for the injection process in blast furnace based on the physicochemical properties and combustion mechanism of the two wastes.The waste disposal in blast furnaces is typically achieved by loading it into the top of the furnace,with the most effective method being injected through the blast furnace tuyeres.In the short term,pulverized coal will remain the primary method,supplemented by waste plastics and tires.This approach adheres to the principle of"spraying with materials and stopping spraying without materials",which is both scientifically sound and easily accepted by iron and steel enterprises.The amount of waste iron per ton in blast furnaces should be controlled within a range of 30 kg to 50 kg.As waste classification technology advances,differentiated injection based on material characteristics can be implemented;The optimal particle size for injecting waste into blast furnaces should be between 4 mm and 8 mm,representing an important direction for low-carbon smelting in the future.

blast furnacewaste plasticwaste tireinjectioncombustion characteristicslow carbon smel-ting

赵永彬

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中冶京诚工程技术有限公司,北京 100176

高炉 废塑料 废轮胎 喷吹 燃烧特性 低碳冶炼

中国五矿科技专项计划项目

2020ZXA01

2024

河北冶金
河北省冶金学会

河北冶金

影响因子:0.124
ISSN:1006-5008
年,卷(期):2024.(6)