大鋼胚連鑄四鑄道鋼液分配器之流力設計

Design of Fluid Flow Control in a Four-strand Tundish of Bloom Continuous Caster

10.30069/MM.199903_43(1).0008

陳正信(Jen-Hsin Chen)；洪正雄(Cheng-Hsiung Hung)；陳奇宏(Chi-Hon Chen)；張晨陽(Chen-Yang Chang)

大鋼胚 ； 連鑄 ； 鋼液分配器 ； 水模 ； Bloom ； Continuous casting ； Tundish ； Water modeling

鑛冶：中國鑛冶工程學會會刊

43卷1期（1999 / 03 / 01）

106 - 113+126

繁體中文

本研究以中鋼鋼鋁研發處1：3縮小尺寸大鋼胚連鑄鋼液分配器水模設備，來進行流體流動的物理模擬，探討擋牆對四鑄道大鋼胚連鑄鋼液分配器流動特性的影響，以提供擋牆尺寸及配置設計的方向；經由脈衝輸入染料追踪劑進行流體流動觀測；經由脈衝輸入KCl追踪劑得到駐留時間分佈曲線，採用mixed model分析駐留時間分佈曲線求得柱流體積分率、滯流體積分率、混合體積分率、最小駐留時間、平均駐留時間、培克雷特數倒數，來評估鋼液分配器流動特性；並利用田口式L9型直交表分析手法，進行四鑄道鋼液分配器的擋牆適化設計。

In this paper, a physical modeling to investigate the effects of dam on the fluid flow characteristics in a four-strand tundish of BCC (Bloom Continuous Caster) were described. The 1:3 reduced scale model tundish in the Steel and Aluminum R&D Department, CSC was used in this study to provide guidance for the design of dam size and location in the tundish. Flow patterns can be visualized after injecting dye as a pulse tracer. KCl was selected to be pulse tracer injected to obtain the RTD (Residence Time Distribution) curve. The approach adopted in the present study was to use the concept of a mixed model to analyze the RTD curve. The desired information of plug flow volume fraction, dead volume fraction, mixed volume fraction, minimum residence time, mean residence time and inverse Peclet number were obtained from the RTD curve to assess the flow characteristics in the tundish. An experiment design of the Taguchi method using an L9 orthogonal array to find the optimum dam design for four-strand tundish has been established.