Yvonne Adjoa Quawson

• Technical support for operations, and training of operators
• Validation of test work programs
• Prioritization of metallurgy projects with superintendent
• Monitor and recommend key plant operating parameters to increase recovery and mill tons throughput
• Ensure cost effectiveness of reagent consumption of process consumables without jeopardizing gold recovery
• Responsible for achieving plant recoveries through agreed metallurgical practices and procedures
• Complete daily, weekly, and monthly metallurgical accounting reports
• Ensure good clear communication lines within team and co-workers
• Actively promote continuous improvements to safety, operation efficiencies and reducing operational costs
• Oversee plant assay lab and technicians
• Manage and monitor gold room personnel.

• Technical support for Mine Operational Readiness
• Technical support for operations, and training of operators
• Coaching, supervision, and evaluation of metallurgy technicians
• Validation of test work programs
• Prioritization of metallurgy projects with superintendent
• Responsible for the department in the absence of the superintendent.

• Successfully recycled spent Lithium-ion batteries to extract the valuable metals (Lithium, Nickel, Manganese and Cobalt) from them, recovered cathode concentrate by precipitation or crystallization of a high purity base metal hydroxide or sulphate mix, and recovery of lithium as a carbonate
• Successfully removed calcium from Lithium Brine via ion exchange
• Optimized the pilot/demonstration plant operational conditions and parameters to maximize overall process efficiency and achieve technical targets
• Gained valuable knowledge in hydrometallurgical experimental design, lab-scale research, technology refine, and scale up the ideas into pilot/demonstration plants
• Carried out various recovery and purification bench scale tests including hydroxide precipitation and ion exchange to purify battery grade products extracted from waste
• Performed other metallurgical laboratory tests as requested by the senior metallurgists
• Trained new co-ops on the job.

• Supervised crushing, milling, dewatering, gravity separation (Knelson concentrators and Acacia), CIL, elution sections, and plant reagent operators
• Acted as senior plant metallurgist in their absence
• Designed, developed budgets, and managed metallurgical projects to exploit process improvement opportunities
• Troubleshoot and optimize circuit efficiency, gold recovery, and reagent utilization to reduce costs
• Participated in document preparation and awareness creation towards International Cyanide Management Code (ICMC) audit and recertification, which was successful
• Responsible for monthly plant survey and sampling in accordance with established standard operating procedures under the direction of the Chief Metallurgist for monthly plant reconciliations
• Lead daily, weekly, and monthly metallurgical accounting reporting
• Ensured all work was carried out in accordance with workplace health and safety policies and regulations
• Created and analyzed databases to gather information, improve performance and production, and to reduce costs
• Optimized mill efficiency by coordinating input from Geology, Mine Operations, Mill Operations, Maintenance, and the Laboratory
• Engaged with suppliers, consultants, and contractors as needed
• Developed SOP's and trained laboratory personnel on how to conduct the developed procedure
• Provided technical support to operations by evaluating, controlling, and optimizing plant performance for gold extraction and recovery improvements
• Carried out laboratory tests including Carbon activity, bottle roll cyanidation, diagnostic leach, bond work index, flocculation, gravity concentration, etc to optimize the plant
• Develop new approaches and methods to improve performance while adhering to industry laws and organizational standards
• Organized and coordinated weekly and monthly departmental planning meetings
• Ensured continuous training of plant operators, technicians, and interns to impart best practices in all metallurgical areas.

• Collaborated with senior plant metallurgists to monitor plant parameters, identify deviations, trouble shoot causes and design solutions for plant optimization
• Performed Metallurgical accounting
• Ensured the quality testing of all mill reagents and other plant consumables received to ensure they meet minimum standards for plant process and minimized cost base by strategically minimizing media and reagent consumption
• Responsible for reagent inventory management
• Developed adequate supervisory skills while ensuring plant operators and Interns acquire adequate training with respect to their working stations
• Ensure the secure, efficient, and accurate functioning of online analyzers, mass meters and samplers throughout the process
• Inspection and calibration of all laboratory instruments.

Specialized courses include Processing of precious metal ores, Engineering economics, Future of mining, Processing of mineral fines, Advanced flotation, Heavy metals, Modelling of industrial systems, and Integrated mining and processing systems.

Training in the lecture room equipping students in physical, process and extractive metallurgy techniques and industrial training through field trips and internships. Specialized courses include Hydrometallurgy, Pyrometallurgy, Mineral Processing, Process Control, Metallurgical Plant Design/Operations, Thermodynamics, Physical Metallurgy and Waste Management.