In aluminum alloy casting, hydrogen content and oxide inclusions are the primary causes of defects such as porosity and cracks. This case study analyzes the WDL-LQJ-900 degassing and deslagging machine, demonstrating its efficient and eco-friendly purification through physical principles.

1. Technical Principle and Advantages of Rotary Degassing

This equipment utilizes advanced rotary refining technology, replacing traditional chemical treatment methods.

• Efficient Dehydrogenation: Inert gas (Argon or Nitrogen) is injected into the melt through a graphite rotor. The rotating head shears the gas into dispersed micro-bubbles, which absorb dissolved hydrogen due to partial pressure differences and carry it to the surface.

• Physical Deslagging: As micro-bubbles rise, they adsorb oxide inclusions via surface tension, causing them to float to the surface for easy removal, achieving simultaneous degassing and slag removal.

• Eco-Friendly Process: Unlike solid chloride refining agents, this process is smokeless, odorless, and non-toxic, meeting environmental standards without corroding the equipment.

2. Core Hardware and Structural Reliability

The equipment features high-performance components to withstand high-temperature environments and frequent operations.

• Refractory Graphite Components: The core rotor is made of high-purity graphite with excellent thermal shock resistance. The spindle speed is frequency-controlled (0-500 r/min) to suit different process requirements.

• Precision Lifting and Transmission: Utilizing a Dawang reducer and chain drive system, the lifting process is stable. An independent frequency-controlled motor ensures precise movement when the rotor enters or exits the molten aluminum.

• Gas Control Precision: Supports a Φ10 gas interface with a maximum flow of 45L/min. The inlet pressure is maintained at 0.2MPa-0.6MPa to optimize bubble dispersion.

3. Intelligent Operation and Process Management

The integrated human-computer interface enables automated control of the refining process.

• Automated Control System: Based on PLC logic and a touchscreen interface, users can preset formula parameters for one-touch automatic program execution.

• Real-time Monitoring: Equipped with tri-color indicators and a buzzer. Upon completion, the graphite head automatically stops rotating and lifts off the surface, ensuring operational safety.

• Power Compatibility: Adapted for 440V/60Hz three-phase five-wire power systems, with a total power consumption of only 2.35kW.

Technical Specifications Summary

• Treatment Process: Rotary injection dehydrogenation, physical adsorption deslagging (zero pollution).

• Gas Parameters: Inert gas flow ≤45L/min, operating pressure 0.2-0.6MPa.

• Power Configuration: 2.35kW total power, frequency-controlled spindle speed.

• Control Performance: PLC automated program control with recipe settings and automatic lifting functions.