Robert Provencher

Title: Innovations in Metal Recycling by Robert Provencher

Introduction

Robert Provencher is an accomplished inventor based in Jonquiere, Canada. He has made significant contributions to the field of metal recycling, particularly in the recycling of aluminum matrix composites. Provencher holds 2 patents that showcase his innovative techniques for recovering clean metal and particulates from composite materials.

Latest Patents

One of Provencher's latest patents focuses on a process for recovering clean metal and particulates from metal matrix composites. This technique involves using a treatment vessel to hold a melt of aluminum matrix composite, which is heated to a temperature range of 700°C to 750°C. The process includes mixing the melt with a power-driven vaned rotary impeller under varying conditions. In the initial mixing stage, a fluxing salt is added while gas is injected beneath the surface of the melt, creating a uniform distribution of gas bubbles. The second stage involves operating the impeller at a high differential velocity, which causes the salt-coated bubbles to collide with reinforcing particles, allowing for the removal of a surface layer that contains impurities, leaving a substantially pure metal.

Another patent by Provencher describes a process for recycling scrap aluminum-matrix composites, such as gates and risers from casting operations. The scrap composite is melted in a treatment vessel at temperatures between 720°C and 750°C. During mixing, a gas is injected to ensure that no vortex is formed, preventing contamination. The gas mixture consists of an inert gas and a minor proportion of a reactive gas. After the gas injection, the melt rests, allowing hydrogen and non-metallic impurities to be removed, resulting in a purified aluminum matrix composite that can be cast in the usual manner.

Career Highlights

Robert Provencher has made a name for himself in the field of metal recycling through his innovative approaches. He works at Alcan International Limited, where he continues to develop and refine his techniques for recycling metal matrix composites. His work has contributed to advancements in sustainable practices within the industry.

Collaborations

Provencher collaborates with his coworker, Gaston Riverin, to further enhance the research and development of metal recycling processes. Their combined expertise has led to significant advancements in the field.

Conclusion

Robert Provencher's contributions to the recycling of aluminum matrix composites demonstrate his commitment to innovation and sustainability. His patents reflect a deep understanding