Super Quality Melts for State-of-the-Art Steel

优质熔炼最先进的钢材

• 批准号: 543572-2019
• 负责人: Guthrie, Roderick
• 金额: $ 7.29万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720735
• 关键词: Super; Quality; Melts; State; Art

Ridding inclusions from liquid steel prior to casting and solidification has vexed steelmakers for many years. Large inclusion agglomerates are sufficiently buoyant, that they can float up to the surface of the liquid steel, if given sufficient time, prior to solidification. However, the smaller inclusion clusters of less than ~60 microns have such low float-out velocities that they remain trapped in the liquid steel, as do other entrained particles, and end-up in the solidified steel. All these inclusions can be very harmful to a steel's properties. We have been working on redressing this problem, by considering how to create microbubble swarms in liquid steel, so as to intercept all sizes of inclusions, and displace them from various "baths" of liquid steel. Using mathematical and full scale water models, we have been able to demonstrate a possible solution to our industrial partners, RTFT, RTMP, and NSC. They enthusiastically agree to support this initiative which will represent a) improved metal powder quality at RTMP, b) improved removal of MPE (metal powder entrainment) at RTFT, and c) improved steel quality at NSC. This CRD program will start, by confirming our water model results to date, using our full scale tundish systems for RTIT and NSC, and a one-third scale model of the RTMP Tundish. Simultaneously, a low temperature, non-wetting, low melting point alloy ("Cerrolow 136"), will be used to confirm the value of this novel "microbubble cleaning" technology, using a recirculating liquid metal loop incorporating controlled gas injection. We will then design equivalent liquid steel tests for Nippon Steel Corporation(NSC), and for the Rio Tinto Metal Powders (RTMP) and Rio Tinto Fer & Titane (RTFT) plants. Given that RTMP is the largest supplier of metal powders to the automobile industry in North America, while RTFT is also a supplier of auto-parts, this will firstly benefit, as well as their secondary metal parts suppliers. This collaboration with NSC will increase the competitiveness of Canada's steelmaking expertise, and lead to the early adoption of the technology, with the promise of dramatic improvements for future steel quality & properties, for the benefit of all.

在铸造和凝固之前去除钢水中的夹杂物多年来一直困扰着钢铁制造商。大的夹杂物团聚体具有足够的浮力，如果在凝固之前有足够的时间，它们可以漂浮到钢水的表面。然而，小于约 60 微米的较小夹杂物簇具有如此低的浮出速度，以至于它们与其他夹带颗粒一样仍然被困在钢水中，并最终进入凝固钢中。所有这些夹杂物都对钢的性能非常有害。我们一直致力于解决这个问题，考虑如何在钢液中产生微气泡群，从而拦截各种尺寸的夹杂物，并将它们从钢液的各种“浴池”中排出。使用数学和全尺寸水模型，我们已经能够向我们的工业合作伙伴 RTFT、RTMP 和 NSC 展示可能的解决方案。他们热情地同意支持这一举措，这将代表 a) RTMP 提高金属粉末质量，b) RTFT 提高 MPE（金属粉末夹带）去除率，以及 c) NSC 提高钢质量。 该 CRD 计划将通过确认我们迄今为止的水模型结果开始，使用我们的 RTIT 和 NSC 的全尺寸中间包系统以及 RTMP 中间包的三分之​​一比例模型。同时，低温、不润湿、低熔点合金（“Cerrolow 136”）将用于确认这种新颖的“微泡清洁”技术的价值，该技术使用结合受控气体注入的再循环液态金属回路。然后，我们将为新日铁公司 (NSC)、力拓金属粉末 (RTMP) 和力拓 Fer & Titane (RTFT) 工厂设计等效的钢水测试。鉴于RTMP是北美汽车行业最大的金属粉末供应商，而RTFT也是汽车零部件供应商，因此首先受益的是其二次金属零部件供应商。与 NSC 的合作将提高加拿大炼钢专业知识的竞争力，并导致该技术的早期采用，并有望显着改善未来钢铁的质量和性能，造福所有人。