Abstract

Implementing preheating furnaces in the aluminum industry, powered by waste heat, has been a subject of interest due to the economic and energy-saving benefits. Metal holding furnaces, keeping aluminum in a liquid state (approx. 760 °C) before casting, are powered by fuel burners. Hot flue gas escapes the cast house furnaces at very high temperatures close to the aluminum melting point and represents a significant energy loss. One can heat aluminum scrap by redirecting hot flue gases from the holding furnace to a metal scrap preheating furnace, which is to be melted, prior to loading them in the metal melting furnace. Introducing a preheating step, incredibly hot flue gas, will reduce the melting time required while saving energy. This present study examines the effectiveness of preheating aluminum sow and billet profiles with hot flue gases and find the optimal design considerations for a preheating furnace. Different approaches to achieve quantitative heat treatment in batch homogenizing furnaces were evaluated. Heat transfer modeling, analysis of flue gas furnace, and sows’ temperature coupled with thermodynamic analysis improve thermal equation prediction precision. Turbulent fluid flow and heat transfer physics are used in a computational fluid dynamics model to simulate aluminum heating by hot gas.

Graphical Abstract

中文翻译：

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铝铸造车间的绿色动力炉，用于使用CO 2-烟气进行废料预热

摘要

由于经济和节能优势，在铝工业中以废热为动力的预热炉已成为人们关注的主题。金属保温炉由燃料燃烧器提供动力，在铸造前将铝保持液态（约760°C）。热烟气在接近铝熔点的非常高的温度下逸出铸造炉，并显着地损失了能量。一个人可以通过将热烟气从保温炉转移到要熔化的金属废料预热炉来加热，然后再将其装载到金属熔炉中。引入预热步骤（非常热的烟气）将减少所需的熔化时间，同时节省能源。本研究检查了用热烟道气预热铝母猪和方坯的有效性，并找到了预热炉的最佳设计考虑。评价了在批均化炉中实现定量热处理的不同方法。传热建模，烟气炉分析以及母猪温度与热力学分析相结合，可提高热方程预测的准确性。在计算流体动力学模型中使用了湍流流体和热传递物理学来模拟热气对铝的加热。母猪的温度与热力学分析相结合，提高了热方程的预测精度。在计算流体动力学模型中使用了湍流流体和热传递物理学来模拟热气对铝的加热。母猪的温度与热力学分析相结合，提高了热方程的预测精度。在计算流体动力学模型中使用了湍流流体和热传递物理学来模拟热气对铝的加热。

图形概要