Research on Resource Recovery and Disposal of Copper-Containing Sludge

Area of Science:

• Environmental Engineering
• Materials Science
• Chemical Engineering

Background:

• Copper-containing sludge from industrial processes poses environmental risks due to high heavy metal concentrations.
• Efficient treatment and disposal methods are crucial for mitigating environmental threats.
• Suspended state technology demonstrates potential for sludge treatment due to favorable mass and heat transfer.

Purpose of the Study:

• To analyze the current application of suspended state technology for copper-containing sludge treatment.
• To design and investigate a device for suspended state treatment of copper-containing sludge.
• To determine optimal process parameters for oxidative decomposition and reduction phases.

Main Methods:

• Development of a suspended state treatment device for copper-containing sludge.
• Investigation of oxidative decomposition and reduction phases using parameters like gas concentration, temperature, contact state, and particle size time.
• Application of orthogonal experiments and single-factor analysis to determine optimal process conditions.

Main Results:

• Optimal conditions for oxidative decomposition: 100 μm sludge, 10% O2, 1 m/s flow rate, 3 min at 900 °C.
• Optimal conditions for reduction: 200 μm sludge, 7% CO, 1.5 m/s flow rate, 5 min at 800 °C.
• Established relationships between influencing factors and copper conversion rates.

Conclusions:

• Suspended state technology is a viable method for treating copper-containing sludge.
• Optimized parameters enhance the efficiency of both oxidative decomposition and reduction processes.
• The developed device and methodology provide a pathway for effective industrial sludge management.