Joel Jonah
Plant Metallurgist at St Barbara Limited- Claim this Profile
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Experience
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St Barbara Limited
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Australia
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Mining
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400 - 500 Employee
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Plant Metallurgist
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Feb 2021 - Present
Carried out plant metallurgical duties at St Barbara owned Simberi gold mine. Carried out plant metallurgical duties at St Barbara owned Simberi gold mine.
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Porgera Joint Venture
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Papua New Guinea
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Mining
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300 - 400 Employee
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Plant Metallurgist (Process engineer)
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Jan 2020 - Jun 2020
Carried out plant metallurgical duties on the back end mineral processing plant - floation (concentrator), concentrate export plant (CEP), pressure oxidation and refinery (CIL/CIP) and and CN detoxification and waste treatment circuit. And overseeing metallurgical lab
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Metallurgical laboratory Supervisor / Metallurgical Specialist
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May 2019 - Jan 2020
Supervised the metallurgical laboratory. Conducted metallurgical lab project & testworks for plant optimization, coordinate and allocate met technicians/graduate mets on daily/weekly/monthly routine tasks, review test designs/plan and MS Excel data base setup and calculations/conditioning and reporting using MS word processing. Manage lab equipment/consumables and allocate metallurgical lab technicians on daily routine tasks, plant trouble shooting diagnostic testworks. Also involve in equipment installations and commissioning and coordinate plant EOM GIC inventory surveys.Also do routine checks on online instruments and calibration data for blue cube sulphide annalyser at flotation circuit. I am responsible for Cyanide analyzer (OCM5000) operation/maintenance at the refinery's leaching circuit.As a metallurgical specialist is to step in for plant metallurgist roles at various metallurgy section as required by the metallurgy management team. Thus carry out Plant metallurgist tasks as well as overall supervision of the PJV metallurgical laboratory
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Crushing and Grinding metallurgist
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Mar 2018 - Apr 2019
- Provide technical guidance to operations team to operate SAG mills,knelson concentrators, SABC crushers,balls mills & cyclopacs.- Provide technical guidance to operations team to operate Primary,secondary & jaw crushers and aggregate plant and convoying systems.- Liase with mine dispatch and mine engineers regarding ore blending and COSP monitoring.- Monitor and adjust expert (SAG & ballmill) system to suit and maximise throughput.- Monitor and do internals inspection of SAG mill,ballmills,knelson concentrators,cyclopacs.- Monitor, adjust and carry out calibrations on 2x SAG mill scanner/ acoustics for mill conditioning. Thus minimizing linner wear and DE grates from premature cracks.- Reagents monitor and minimizing grinding media and PAX consumptions rates and maintaining optimum mill throughput with high flotation Au recovery.
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Concentrate Export Plant metallurgist
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Jan 2017 - Feb 2018
#Provided technical guidance to operations team, to operate pneumatic plate filter and deslime circuit for producing wet concentrates#Liase,with logistics for concentrate movement from site via lae to china
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Project metallurgist
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Jan 2017 - Dec 2017
#Carried out plant and laboratory trials for plant optimizations.#Historical met acc & Pi data retrieve, analysis and report write up.#Assist external contractors on improvement project
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Metallurgical Accountant
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Jan 2016 - Dec 2016
Carried out metal,balance,reporting and reagent/consumble managments and budgeting. Hence data base setup and processing budget documents/report writeup. Also did daily reporting of metallurgical accounting reports
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Metallurgical lab Supervisor
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Jan 2016 - Dec 2016
#Supervised pjv metlab on daily task,allocations, diagnostic testworks , lab scale projects, data base setup and testwork data analysis and reporting.# Trained lab contractors as well met technicians on lab routines and projects.
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Flotation metallurgist
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Jan 2016 - Dec 2016
Assisted the process operations to operate 5x float banks and 3x regrind mill. Provided technical guidance for the operation of the flotation (concentrator). Hence using the Portage expert and blue cube system for operation of the process plant. To acquire required gold and sulphur recovery target.
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Pressure oxidation (autoclaves),thickening and waste treatment circuit metallurgist
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Nov 2013 - Dec 2015
#Provide technical assistance to Pox operation to operate 4x pressure oxidation(autoclaves) vessel to oxidize sulphides under 1750kpa & 195_199deg.©#Provide techical,guidance on operations,of 3x thickeners,conc blending and autoclaves feed preparations.#Provide tecnical guidance on waste treatment circuit
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Refinery metallurgists
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Jan 2013 - Oct 2013
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Underground Backfill paste plant metallurgist
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Mar 2012 - Dec 2012
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Ramu Nickel Ltd.
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Public Safety
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1 - 100 Employee
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Trainee process engineer
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Sep 2011 - Dec 2011
Assist sectional supervisor during the commisoning of the chromite removal and letarite ore treatment plant at kbk mine site. Assist sectional supervisor during the commisoning of the chromite removal and letarite ore treatment plant at kbk mine site.
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Education
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Papua New Guinea University of Technology
Bachelor of Engineering - BE, Minerals Processing Engineering -
Bumayong Lutheran Secondary
Lower secondary -
Tusbab secondary
Upper secondary