Systematic control technologies for gaseous pollutants from non-ferrous metallurgy

Area of Science:

• Environmental Science
• Metallurgical Engineering
• Chemical Engineering

Background:

• Non-ferrous metallurgy faces significant challenges in managing air pollutant emissions for sustainable development.
• Key pollutants include heavy metal particles, mercury, sulfur oxides (SOx), and fluoride, originating from smelting processes.

Purpose of the Study:

• To investigate emission characteristics, formation mechanisms, and separation of air pollutants in non-ferrous smelting.
• To develop and establish integrated technologies for multi-pollutant control and resource recovery from industrial flue gases.

Main Methods:

• Optimization of furnace throat and high-temperature discharge for fine particle control.
• Advancements in wet scrubbing technology for mercury, fluoride, and SOx removal.
• Development of gas-liquid sulfidation and digital source reduction methods.
• Novel low-temperature catalytic desulfurization technologies.

Main Results:

• Effective collaborative control and recovery of fine particles from copper, lead, and zinc smelting flue gas.
• Significant improvements in removing mercury, fluoride, and SO2 using enhanced wet scrubbing.
• Efficient and eco-friendly recycling of acid scrubbing wastewater via gas-liquid sulfidation.
• Successful application of digital technology for sulfur and fluoride reduction in aluminum electrolysis.
• Development of new methods for catalytic reduction of sulfur in petroleum coke and SO2 to elemental sulfur.

Conclusions:

• Established a comprehensive technological system for coupled multi-pollutant control and resource recovery in non-ferrous metallurgy.
• Provided a scientific basis and practical application technologies for treating air pollutants in the industry.
• The developed technologies contribute to the green development of the non-ferrous metallurgy sector.