Summary
Overview
Work History
Education
Skills
Timeline
Generic

Gerardo Fontes

Tucson,AZ

Summary

  • Experienced Metallurgical Engineer with excellent management skills and with 23 years of experience in the mining industry.
  • Mining experience includes operation and supervision of copper and non metallic flotation plants, including stages of crushing, grinding, flotation, filtering and Thickeners.
  • Experience on leaching and solvent extraction,
  • Experience on managing and supervision of personnel
  • Testing experience includes leaching studies of copper, gold, and silver
  • Testing on solvent extraction of copper, molybdenum, and Rhenium and flotation testing of sulfides and industrial minerals.
  • Testing of In situ leaching of copper(Florence Copper)
  • Plant audit/IN-FIELD TROUBLESHOOTING of sulfides and industrial mineral concentrators, Heap leach and solvent extraction plants
  • Expertise also includes ore characterization, mineralogy, use of XRD, XRF, Qemscan and MLA.
  • Detail oriented with strong ability to communicate in English and Spanish
  • Self-motivated individual, results oriented and dependable professional achieving high performance with minimal supervision.

Overview

36
36
years of professional experience

Work History

Lab Manager/Senior Metallurgist

Base Met Labs US LTD
Tucson, AZ
10.2022 - Current
  • Bench froth flotation
  • Grinding
  • Solvent Extraction
  • Column leach studies
  • Gravity Concentration
  • Agitated leach
  • Plant Audit/In-field troubleshooting
  • Report preparation and walked clients through results and recommendations
  • Coordinate personnel to achieve targets

Senior Metallurgist for Leaching/SXEW

Asarco Ray Mine
Kearny, AZ
03.2022 - 10.2023
  • Maintain KPI's for copper leaching and SXEW.
  • Maintain and update Leaching and SXEW mass balances
  • Column/bottle roll testing for budget and selection of leaching parameters.
  • Run tests to classify ore for leaching or flotation process
  • Supervision/monitoring copper solvent extraction plant to ensure maximum efficiency of the process.
  • Daily check of organic and aqueous conditions and provide modifications to the process to increase copper recoveries.
  • Daily monitoring to Copper Electrowinning to ensure max plating and max current efficiencies.

Technical Sales Representative

Clariant Mining solutions
Tucson, AZ
08.2020 - 03.2022
  • Pleasantly greeted customers both in-person and on phone, providing exceptional assistance and service and promoting lasting business relationships.
  • Identified collectors, frothers and many others products for sulfide flotation and services that would be best fit for customer projects.
  • Assessed customer needs, explained complex technical information and provided information regarding useful products and promotions.
  • Updated and organized records of customer accounts, contact information and transactions.
  • Reported and presented sales, leads and new contacts to management when appropriate.
  • Hosted customer meetings to discuss specifications and budgets to reach specific objectives.

Lab Manager/Plant Metallurgist

Excelsior Mining
Tucson, AZ
05.2019 - 01.2020
  • In situ leaching project, on charge of the analytical lab and support for SX-EW metallurgy
  • Metallurgical Support for the Wellfields operations(In situ)
  • Set up of the analytical laboratory

Senior Technical Specialist

BASF Corporation (Mining Solutions)
Tucson, AZ
01.2017 - 05.2019
  • Design and conduct flotation experiments for copper, molydenum, gold, lithium, apatite, rare earths, potash an other industrial minerals.
  • Analyze data and report results to clients.
  • Support hydrometalurgy department.
  • Walked costumers through results and selection of the best products.
  • Procurement of reagents and logistics

Plant Metalurgist

Asarco LLC, Ray Concentrator
Kearny, AZ
09.2014 - 12.2016
  • Supervision of copper concentrator(mill)
  • Conduct column leach studies
  • Report results to Plant Manager
  • Flotation Testing
  • Ore characterization
  • Concentrator mass balances
  • Process water-water recovery
  • Solvent extraction plant
  • Electrowining plant

Senior Metallurgical Engineer

SGS E&S Engineering Solutions(Former METCON Research)
Tucson, AZ
01.2013 - 04.2014
  • Project Manager on metallurgical research;
  • In situ leaching
  • Bench froth flotation
  • Grinding
  • Solvent Extraction
  • Column leach studies
  • Gravity Concentration
  • Agitated leach
  • Plant Audit/In-field troubleshooting
  • Report preparation and walked clients through results and recommendations
  • Coordinate personnel to achive targets
  • Direct contact with clients

Senior Metallurgical Engineer

METCON Research Inc/KD Engineering
Tucson, AZ
10.2005 - 04.2013

Project Manager;

  • In situ leaching
  • Column Leach Studies
  • Solvent Extraction
  • Gravity Concentration
  • Agitated Leaching
  • Grinding
  • Plant Audit/In-Flied Troubleshooting
  • Report Preparation-walked clients through results and recommendations
  • Coordinate personal to achieve targets

Consultant (Sonora, Mexico)/Full time Student

Self Employed-Student
Tucson, AZ
12.2001 - 01.2005

Support for small miners

  • Column Leach testing for Gold, SIlver and Copper
  • Metallurgical mass balances
  • Bench Flotation Testing
  • Gravity Concentration-Set up and Production

Mold Construccion and Quality Operator

Tucson Foundry
Tucson, AZ
02.2000 - 11.2000
  • Mold Construction-Parts for Copper Smelters
  • Cooling Pipes Construction and Design
  • Quality Control in Final Parts

Process Engineer

Nyco Minerals
Hermosillo, Sonora, Mexico
06.1996 - 12.1999

Wollastonite Froth Flotation Plant


  • Process Development
  • Reagent Selecction
  • Pilot Plant Tesing(Dry Process)
  • Plant Design Asistance
  • Lab Manager (Set up and Operation, 6 lab technitians)
  • Flotation Plant and Dry Process Supervisor
  • Product Development (Dry Process)
  • Operation and improvement of Osokawa Mill and Classifier


Student

Master Degree (University of Sonora)
Hermosillo, Sonora
06.1993 - 06.1995

MS Degree in Extractive Metallurgy

Technical Assitant

Molymex (Molybdenum Roasting)
Cumpas, Sonora, Mexico
02.1994 - 03.1995
  • Metallurgical Control of Production and Quality
  • Feed -Blend Preparation
  • Ipment and Receiving Concentrates

Production Supervisor

AMP Inc.
Hermosillo, Sonora, Mexico
07.1992 - 05.1993
  • Supervising 4 assembly lines - 30 technitians
  • Electronic Filter (signal) Fabrication
  • Quality Control on Final Products
  • Equipment Set up
  • Production Line Design

Froth Flotation Plant Supervisor

Compania Minera de Cananea
Cananea, Sonora, Mexico
08.1989 - 04.1992

Complete Flotation Plant Supervisor


  • Supervising complete Mill operation(feed conveyors to Thickners)
  • Supervising 30 operators
  • Metallurgical mass Balances
  • Control of all flotation process parameters
  • Control Room Supervisor





Education

Bachelor of Science - Extractive Metallurgy

University of Sonora
Hermosillo, Sonora, Mexico
1989

Master of Science - Extractive Metallurgy

University of Sonora
Hermosillo, Sonora, Mexico
1995

Skills

  • Statistical and experiment design techniques
  • Report generetaion and analysis
  • Bilingual in Spanish and English
  • Safety measures
  • Modeling of metallurgical process (METSIM-leaching only)
  • Good managment skills
  • Quality assurance
  • Mentoring and training

Timeline

Lab Manager/Senior Metallurgist

Base Met Labs US LTD
10.2022 - Current

Senior Metallurgist for Leaching/SXEW

Asarco Ray Mine
03.2022 - 10.2023

Technical Sales Representative

Clariant Mining solutions
08.2020 - 03.2022

Lab Manager/Plant Metallurgist

Excelsior Mining
05.2019 - 01.2020

Senior Technical Specialist

BASF Corporation (Mining Solutions)
01.2017 - 05.2019

Plant Metalurgist

Asarco LLC, Ray Concentrator
09.2014 - 12.2016

Senior Metallurgical Engineer

SGS E&S Engineering Solutions(Former METCON Research)
01.2013 - 04.2014

Senior Metallurgical Engineer

METCON Research Inc/KD Engineering
10.2005 - 04.2013

Consultant (Sonora, Mexico)/Full time Student

Self Employed-Student
12.2001 - 01.2005

Mold Construccion and Quality Operator

Tucson Foundry
02.2000 - 11.2000

Process Engineer

Nyco Minerals
06.1996 - 12.1999

Technical Assitant

Molymex (Molybdenum Roasting)
02.1994 - 03.1995

Student

Master Degree (University of Sonora)
06.1993 - 06.1995

Production Supervisor

AMP Inc.
07.1992 - 05.1993

Froth Flotation Plant Supervisor

Compania Minera de Cananea
08.1989 - 04.1992

Bachelor of Science - Extractive Metallurgy

University of Sonora

Master of Science - Extractive Metallurgy

University of Sonora
Gerardo Fontes