Development and Application of New Combustion Technology in Foreign Aluminium Industry Furnaces (1)

 News     |      2020-09-18 10:01
Changing coal-fired boilers to coke oven gas
In the future, precious energy sources such as natural gas, oil and electricity will become scarcer and even gradually depleted. Both domestic and foreign results show that the use of recycled metals to replace primary metals is an effective measure and key way to save energy. In the metal recovery and smelting process, the quality of the combustion system is a key factor affecting the amount of energy consumption. In the current industrial production of aluminum processing and secondary aluminum, an air-fuel combustion system is generally used. Nowadays, the pressure of global competition is gradually increasing, requiring the reduction of greenhouse gas emissions, more frequent environmental inspections, and rising fuel prices have made the aluminum industry more and more concerned about improving energy efficiency and reducing production costs. Pure oxygen combustion technology is a new type of combustion technology developed under this background, which can well meet these needs of the aluminum industry. In the past few decades, Linde has upgraded hundreds of metal smelting and processing furnaces from air combustion to pure oxy-fuel combustion, so it has extensive experience in the application of oxygen to industrial furnaces. These rich experience in the optimization of the production process before and after the pure oxy-combustion transformation can avoid the costly risk of trial and error at the initial stage of the project transformation and ensure that the furnace can safely and smoothly switch from air combustion to pure oxy-fuel combustion. This article will describe the benefits brought by the application of oxy-fuel technology and the potential risks that may exist in oxy-fuel technology.

The combustion process of industrial furnaces is where a large amount of energy is consumed and the main pollutant emission source. Energy in the metal industry is mainly used for heating, melting, smelting and reheating the materials produced. At present, China's output of most metal products accounts for more than 50% of the world's total output, such as steel and aluminum alloys. More than two-thirds of steel output comes from Asia. In China, there are more than 120,000 industrial furnaces in operation. The energy consumption of these industrial furnaces accounts for more than 25% of China's total energy consumption and more than 60% of the energy consumption in the industrial sector. Iron and steel, non-ferrous metals and other industries are the main energy consumption and pollutant emitters.