Koji Ando

Title: Innovations of Koji Ando in Precious Metal Concentration

Introduction

Koji Ando is a notable inventor based in Niihama, Japan. He has made significant contributions to the field of metallurgy, particularly in the concentration of precious metals. His innovative methods have the potential to enhance the efficiency of metal recovery processes.

Latest Patents

Koji Ando holds a patent for a method titled "Method for concentrating precious metals contained in leaching residue discharged from copper hydrometallurgical process." This patent describes a process that involves removing pyrite from leaching residue to concentrate precious metals. The method includes steps such as leaching in an acidic, aqueous solution, reducing copper-containing leaching liquor, and electrolysis for copper recovery. The process consists of a pyrolysis step, where the leaching residue is thermally treated at 550°C or higher in a non-oxidative atmosphere, producing calcined ore containing pyrrhotite, precious metals, and gangue. Additionally, a re-leaching step is performed to separate the re-leaching residue and iron-leached liquor.

Career Highlights

Koji Ando is associated with Sumitomo Metal Mining Company, Ltd., where he has been instrumental in advancing metallurgical processes. His work has contributed to the company's reputation as a leader in the mining and metal recovery industry.

Collaborations

One of his notable collaborators is Keiji Kudo, with whom he has worked on various projects related to precious metal recovery.

Conclusion

Koji Ando's innovative methods for concentrating precious metals represent a significant advancement in the field of metallurgy. His contributions continue to influence the efficiency of metal recovery processes in the industry.