Investigation on Nozzle Blockage during Continuous Casting of Steel

钢连铸过程中水口堵塞的探讨

• 批准号: 521287-2017
• 负责人: McLean, Alexander
• 金额: $ 1.82万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639964
• 关键词: Investigation; Nozzle; Blockage; during; Continuous

Continuous casting of molten steel is one of the most significant technological innovations in the field ofsteelmaking within the last 60 years. However, blockage or clogging of the refractory submerged entry nozzlewhich protects the steel from atmospheric oxidation during transfer processes is a serious problem due to theadverse effects on the casting operation and quality of the cast product. In collaboration with Gerdau Whitby,the proposed study is aimed at characterizing materials deposited on the walls of blocked nozzles, investigatingthe possible sources of these materials, and evaluating the effect of operational parameters on the formation ofclogging. Gerdau is the leading company in the production of long steel specialty products in the Americas andone of the world's major suppliers. Gerdau's North American business divisions serve the construction,automotive, agricultural, real estate and energy markets through a vertically integrated network of steel mills,recycling operations, and downstream processing facilities. The steel plant in Whitby, Ontario is one of threeGerdau mills operating in Canada and employs approximately 500 people. Gerdau Whitby transforms scrapmetal from about 240,000 old cars a year into special steel products including beams and piling, rebar, specialbar and wire rod. The objectives of this project can be defined as follows: 1) Investigate nozzle blockageconstituents using advanced characterization techniques. 2) Relate the results to the inclusions found in steelsamples obtained at different stages during the steelmaking and casting processes. 3) Evaluate the relativeeffectiveness of modifying operational parameters such as steel composition, casting temperature, refractoriesand liquid steel flow, in order to eliminate nozzle blockage problems. The overall aim of the project is togenerate a bank of new knowledge and facilitate technology transfer between academia and the industrial sectorthat will result in improved steelmaking processes, higher quality product and reduced treatment time. Anadditional benefit will be the training of students in metallurgical chemistry and materials characterizationwhich in turn will boost excellence in science and engineering within Canadian-based organizations.

在过去60年中，熔融钢的连续铸造是史钢领域中最重要的技术创新之一。但是，由于对铸造产品的铸造操作和铸造产品的质量，可以保护钢在转移过程中保护钢免受大气中的氧化不受大气氧化的堵塞或堵塞，这是一个严重的问题。与Gerdau Whitby合作，拟议的研究旨在表征沉积在被封锁的喷嘴墙壁上的材料，研究这些材料的可能来源，并评估操作参数对cloggogging形成的影响。 Gerdau是在美洲生产长钢特种产品和世界主要供应商之一的领先公司。 Gerdau的北美商业部门通过垂直集成的钢铁厂，回收运营和下游加工设施的网络为建筑，汽车，农业，房地产和能源市场提供服务。安大略省惠特比（Whitby）的钢铁厂是在加拿大经营的Trifgerdau磨坊之一，约有500名员工。 Gerdau Whitby将碎屑从每年约240,000辆旧车转变为特殊的钢制产品，包括横梁和堆积，钢筋，特种式和钢丝杆。该项目的目标可以定义如下：1）使用高级特征技术研究喷嘴blockageconstitunts。 2）将结果与在钢制和铸造过程中在不同阶段获得的钢塑料中发现的夹杂物相关联。 3）评估修改操作参数的相对效率，例如钢组成，铸造温度，耐火和液体钢流，以消除喷嘴阻塞问题。该项目的总体目的是切换一批新知识，并促进学术界和工业部门之间的技术转移，将改善钢铁生产工艺，更高质量的产品和减少的治疗时间。 Anadditional的益处将是对冶金化学和材料表征的学生进行培训，从而促进加拿大组织中的科学和工程学卓越。