|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deriving Value from Challenging Waste Streams: Recycling and Sustainability Joint Session
||A New Technology for Cleaning Machining Metal Chips
||Murray Small, Matthew Kropf, Subodh K. Das, Ravi Verma
|On-Site Speaker (Planned)
||Subodh K. Das
A process for cleaning machining metal chips is proposed that employs high frequency ultrasound to dislodge oil and fine dirt from chips by generating cavitation events near the water-chip interfaces. It is environmentally friendly as no aggressive chemicals are employed, and the effluent water in most cases can be released into local water mains without further treatment. The process has been successfully demonstrated on titanium chips requiring high purity for closed-loop recycling back in to aerospace grade ingot. Typical carbon levels in the treated titanium chips were reported close to 0.040 percent. Following the bench studies, a reactor for treating up to 1,000 pounds of chips per hour has been designed. A preliminary economic analysis indicates the cost of cleaning titanium chips by the new process to be a fraction of that by the current chemical-based processes.