鍍鋅產線氣刀分析技術開發與應用

Development and Application of Air Knife Analysis Technology in Hot-Dip Galvanized Steel Strip Production

鄒穎(Ying Tsou)

《鑛冶：中國鑛冶工程學會會刊》 59卷2期 (2015/06) Pp. 43-58

https://doi.org/10.30069/MM.201506_59(2).0004

摘要

本研究中，量測熱浸鍍鋅鋼帶產線氣刀系統對鋼帶產生之衝擊壓力，了解衝擊壓力的大小及分佈，並利用計算流體力學方式模擬氣刀產生之三維流場現象及分析鍍鋅層厚度，研究得知鋼帶邊緣處造成鍍鋅層過厚缺陷的主因是壓力分佈不均，對此提出緩衝板的改造方案，並於現場落實應用，此外，也利用鋅液飛濺理論建立一判斷程式提供現場操作參考，落實結果可有效抑制鋼帶邊緣吹痕及鍍鋅層過厚缺陷，使相關的總剔退率由4.6%降至0.9%，貢獻之年效益約780萬。經研究過程中建立氣刀設備分析的核心技術，未來有助於氣刀設備國產化目標的實現。

關鍵字

鍍鋅產線氣刀 ； 計算流體力學

並列摘要

In this study, we developed an air knife analysis technology to measure air pressure and distribution on the steel trip surface in the hot-dip galvanized steel strip production. We also utilized a 3D fluid dynamics simulator to simulate the air knife flow system and to compute the thickness distribution of zinc coating layer. Results of this research showed that the non-uniform pressure distribution mainly caused the coating defect of zinc layer at the edge of steel strip. We improved the shape of the buffer board installed in the air knife system that minimized the coating defect. Based on the liquid zinc splash theory, we established a calculation program that can predict the outcome of setting operational parameters. Implementation of the new technology successfully suppressed coating layer defect at the edge of steel strip that reduced the rejection rate from 4.6% to 0.9% - an annual benefit of about 7.8 million NTD.

並列關鍵字

Air knife ； Computational fluid dynamics