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Bioleaching Modeling-A Review.

Manuel Saldaña^1,2, Matías Jeldres², Felipe M Galleguillos Madrid³

¹Faculty of Engineering and Architecture, Arturo Prat University, Iquique 1110939, Chile.

Materials (Basel, Switzerland)

|May 27, 2023

Summary

Bioleaching uses microorganisms for mineral extraction, offering an eco-friendly alternative to traditional mining. This study explores modeling techniques for bioleaching processes, focusing on mineral recovery rates.

Keywords:

machine learning microorganisms mineral bioleaching mineral processing theoretical and empirical modeling

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Area of Science:

* Environmental Science
* Mining Engineering
* Bioprocess Engineering

Background:

* Mineral leaching is a key step in metal extraction, with bioleaching emerging as a sustainable alternative to pyrometallurgical methods.
* Bioleaching offers environmental benefits like reduced emissions, lower costs, and suitability for low-grade ores.
* Traditional mining methods often carry significant environmental liabilities.

Purpose of the Study:

* To present the theoretical basis for modeling bioleaching processes.
* To focus on the modeling of mineral recovery rates within bioleaching.
* To review various modeling approaches for mineral dissolution.

Main Methods:

* Review of conventional leaching dynamics models, including the shrinking core model.
* Exploration of diffusion-controlled, chemically controlled, and film diffusion-controlled oxidation processes.
* Introduction to statistical analysis models like surface response methodology and machine learning algorithms.

Main Results:

* Established models range from diffusion-based to advanced statistical and machine learning approaches.
* Bioleaching modeling for industrial minerals is a developed field.
* Bioleaching modeling for rare earth elements presents significant future growth potential.

Conclusions:

* Bioleaching presents a more sustainable and environmentally friendly mining approach.
* Modeling is crucial for optimizing bioleaching processes and mineral recovery.
* Further research in rare earth element bioleaching modeling is warranted.