Material selection forhigh pressure reactor microwave- assisted leaching of platinum group metals

Vera Villamizar; Emely Daniela; Florez Serrano; Elkin Gregorio; Bolívar León Rafael

Author(s)

Vera Villamizar Department of Mechanical Engineering, Pamplona University,Pamplona, Norte de Santander,Colombia

Emely Daniela Department of Mechanical Engineering, Pamplona University,Pamplona, Norte de Santander,Colombia

Florez Serrano Department of Mechanical Engineering, Pamplona University,Pamplona, Norte de Santander,Colombia

Elkin Gregorio Department of Mechanical Engineering, Pamplona University,Pamplona, Norte de Santander,Colombia

Bolívar León Rafael Department of Mechanical Engineering, Pamplona University,Pamplona, Norte de Santander,Colombia

Abstract

The Colombian Platinum alluvium is made up of platinum, iridium, osmium and palladium. Iridium and Osmium confer a refractoriness condition that makes alluvium leaching difficult, being the first aspect to be solved in the development of a refining process. Microwave acid leaching offers a higher leaching rate with high levels of recovery, so it seems a possible process to move forward in this regard. For this reason, this article aims is to select materials for the fabrication of a low-cost industrial reactor with a volume capacity of 180 ml fulfilling the requirements of pressure, temperature, chemical resistance, easy fabrication and safety. Materials selection was made using an Ashby methodology. Reactor was divided in six different sub systems. The first step of the Ashby methodology resulted in a mechanical, chemical and thermal properties list, including objectives to minimized some properties and material index in order to choose the best material. The screen-out step was made using ANSYSGRANTA SELECTOR software and obtained four materials. The availability of this materials in Colombia was constated, choosing finally PTFE and POM-H. A reactor fabrication was made by CNC and a test to measure the reached temperature on the reactor wall was made, resulted in values 20°C below of services temperature of the material.

Publication Details

Page(s) 219-227

DOI DOI not available

Published Journal: ARPN Journal of Engineering and Applied Sciences, Volume: 17, Issue: 2, Year: 2022

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Keywords

selection materials, material index, ashby methodology

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