Environmentally Conscious Manufacturing: Environmentally Conscious Plasma Arc Processes for Enhanced Metal Production

环保制造：用于增强金属生产的环保等离子弧工艺

• 批准号: 9528635
• 负责人: Uday Pal
• 金额: $ 40万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528635&HistoricalAwards=false
• 关键词: Environmentally; Conscious; Manufacturing; Plasma; Arc

9528635 Szekely During smelting of ferrous and non-ferrous metals, ionic melts such as slags, fluxes or mattes react with gases and metals. These reactions are electrochemical in nature involving charge transfer between ionic an electronic species and are often diffusion limited in the slag phase. Since slags, fluxes and mattes are primarily ionic melts, the diffusion process is controlled by the slower moving electronic species. The objective of this research is to enhance the slag-metal reaction by using a plasma to provide an electronic pathway in the slag and assess the magnitude of its impact on processing ferrous melts in terms of lowering iron oxide (FeO) content and volume of the slag, and increasing yield, refractory life and recovery of alloying elements. Preliminary results indicate a potential reduction of ten fold in the percent of FeO needed for decarburization of iron-carbon melt. Annual world production and consumption of metals is close to 750 million tons, of which iron is ninety-five percent. Extraction, smelting, refining and reclaiming processes associated with metals produce large quantities of both hazardous and non-hazardous wastes and thus have a significant impact on the environment. This project could revolutionize steelmaking by dramatically reducing both the volume and the iron content of the slag that must be disposed of. It could also open other opportunities in the removal of copper and zinc from ferrous scraps and in the matte smelting of copper, which would also have a major economic and environmental impact.

9528635在亚铁和非有产金属的冶炼中，离子熔体，例如矿渣，通量或哑光等离子熔体与气体和金属反应。 这些反应本质上是电化学的，涉及电子物种之间的电荷转移，并且在炉渣阶段通常受到扩散限制。 由于炉渣，通量和哑光主要是离子熔体，因此扩散过程由移动电子物种较慢控制。 这项研究的目的是通过使用等离子体在炉渣中提供电子途径来增强矿渣 - 金属反应，并评估其对降低氧化铁（FEO）（FEO）含量（FEO）含量（FEO）含量和增加炉灶的影响的影响，并增加产量，产量的增加，冷冻寿命，冷冻寿命和合金元素的恢复。 初步结果表明，铁碳熔体所需的FEO百分比可能会减少十倍。 年度生产和金属的消费量接近7.5亿吨，其中铁为百分之九十五。 与金属相关的提取，冶炼，炼油和回收过程产生大量危险和非危害废物，因此对环境产生了重大影响。 该项目可以通过大大减少必须处置的炉渣的体积和铁含量来彻底改变钢制。 它还可以为清除铜和锌从黑色的废料和铜冶炼中取出铜和锌的其他机会，这也将产生重大的经济和环境影响。