Our country is the world’s largest aluminum production and consumer, the healthy development of aluminum industry, has an important impact on the stability of the global aluminum market, China’s aluminum industry not only covers aluminum mining and smelting, but also includes aluminum deep processing and application, which makes China occupy a pivotal position in the global aluminum industry.
With the improvement of environmental protection requirements and the popularization of green development concept, aluminum smelters need to make continuous progress in technological innovation and environmental protection, but the smelting furnace in the production process, will produce a variety of pollutants, aluminum smelters need to take effective environmental protection measures to reduce the impact of waste gas on the environment and the human body.
During the operation of the smelting furnace, it is necessary to burn fuel to provide enough heat for metal melting, waste aluminum itself contains combustible materials, under high temperature conditions, will also produce waste gas, in the high temperature melting process, nitrogen and oxygen in the air reaction to produce nitrogen oxides, melting process is the main link of the aluminum smelting plant to produce nitrogen oxides. Aluminum smelters will produce nitrogen oxide emissions in many stages of production, especially in the smelting stage, through high temperature combustion, the production of nitrogen oxides is the largest; However, in the process of aluminum-ash slag treatment, the exhaust gas is discharged after dust removal and desulphurization, and the nitrogen oxide emission is still accompanied in the treatment process. In the process of loading and unloading, crushing, sorting, etc., dust containing waste gas will also be produced, which is discharged after treatment, and certain nitrogen oxides may also be produced in the process.
Aluminum smelting furnace in the production process will produce a variety of pollutants, including particulate matter, nitrogen oxides, sulfur dioxide, etc., at the same time will also produce a large number of hazardous waste, nitrogen oxide production, is one of the main pollutants forming acid rain, for human health also has a certain impact. In order to effectively control and control nitrogen oxide emissions, aluminum smelters can take the following measures:
1, by improving the production process, optimize the production process, improve energy efficiency, reduce waste gas generation.
2. Select SCR denitration system (selective catalytic reduction technology) to achieve near-zero emission of nitrogen oxides.
3, enhance ventilation measures to improve the effect of smoke treatment. By adopting advanced technology and management measures, aluminum smelters can effectively control nitrogen oxide emissions and protect the environment and public health.
Post time: Mar-04-2024