Sahil Kumar, P. Eng. Email & Phone Number

Mississauga, Ontario, Canada

- Optimizing flowsheets by bench, pilot and demo-plant testing to recover valuable metals including zinc, lead, copper, silver, gold, cobalt, nickel, vanadium, titanium, manganese, iron, lithium and PGMs from ores, batteries, electronic wastes and tailings- Designing and performing various extractive metallurgy (hydrometallurgical, pyrometallurgical, mineral processing) unit operations comprising solvent extraction, ion exchange, leaching, solid-liquid separation, electrodialysis, leaching, cementation, precipitation, calcination, acid roasting and crystallization - Operated in pilot plant campaigns to maximize recovery of uranium from ore via pugging-curing, leaching, solvent extraction, impurities precipitation and uranium yellow cake precipitation - Involved in development of sustainable processes to produce battery grade nickel, cobalt, manganese and copper sulfate salts from recycling battery materials (black mass) and intermediate process streams by solvent extraction - Performed testwork to optimize recovery of gold from carbon fine wastes through cyanidation - carbon in leach (CIL) & pulp (CIP), and resin in leach (RIL) & pulp (RIP)- Leaded and optimized lithium process flowsheets on spodumene rocks through process steps involving grinding, flotation, calcination, acid roasting, water leaching, impurities removal, and recovery of lithium carbonate and lithium hydroxide- Project manager of pilot plant campaign to produce high purity alumina (HPA) from anorthosite ore - Set-up and operated catalytic distillation (CD) experiments to study the feasibility of efficient production of performic acid (PFA) for use in waste water treatment. PFA is a third-generation disinfectant that represents green chemistry- Performing solid-liquid separation projects through flocculant selection, thickening/settling, vacuum and pressure filtration - Performing mass/material balance in each process flowsheet

Mississauga, Canada

- Authorized as the operator responsible to successfully run the pilot plant operation of producing 99.8% pure Titanium dioxide (TiO2) and 98.5% Iron oxide (Fe2O3) products from ilmenite ore -Involved in all five major hydrometallurgical processing stages of ilmenite to produce high grade TiO2 and Fe2O3 products: (i) atmospheric chloride leaching; (ii) oxidation; (iii) iron solvent extraction/precipitation/calcination; (iv) titanium solvent extraction/precipitation/calcination; and (v) recycle of titanium raffinate back into the leaching stage -Performed high priority bench scale laboratory testing to extract valuable nickel and cobalt metals from laterite ore by designing experiments with varying operating conditions such as temperature, pH, free acid, lixiviants and developing “McCabe-Thiele” isotherms for the solvent extraction process (extraction & stripping)-Collaborated with senior members in the evaluation of uranium from various samples using a Geiger counter and increasing the concentration of uranium by a sophisticated process known as “rigging”

Woodbridge, Ontario

- Member of the production team which produced 5 tonnes/week of OIP (Obsidian Interlaced Polyol) resin using renewable bio-content (amorphous carbon) replacing petroleum-based SAN plastics in foam; thereby reducing carbon footprint- Performed analytical foam testing including particle size analysis, moisture analysis, and viscosity, on the product and modelled data to discover trends and draw conclusions- Conducted research on particle size and mills performance optimization to further improve the machine efficiency- Designed experiments (DoE) to determine the effectiveness of implementing engineering changes to process/equipment and present findings in daily meetings with supervisors

Mississauga, Canada

- Delegated as an integral technician to execute testing work of recovering high concentration of hydrochloric acid from iron solvent extraction circuit, along with production of iron oxide and ammonium sulfate as marketable products - Performed leaching of ores, concentrates and tailing/waste materials with mixed chloride, sulphate and alkaline mediums- Prepared samples by ball grinding, pulverization, sieving, particle size analysis and conducted further testing using the ICP-OES and by wet chemical analysis methods such as free acid titrations and Fe oxidation titrations

Mississauga, Canada

- Conducted analysis for the extraction and separation of metals including cobalt, nickel, gold, iron, copper, zinc and manganese from laterite ores and pregnant strip solutions using the principles of liquid-liquid extraction - Performed innovative solvent extraction process steps involving counter-current extraction and stripping batch experiments to recover over 99% of precious cobalt and nickel metals for high grade battery products- Principles of solvent extraction were utilized which incorporated the specific processes of "washing" - to remove impurities; increasing the pH of the respected solution to remove undesired metals such as Fe, Al and Cu; and also finding the ideal temperature for effective reaction kinetics and product quality- Different organic/aqueous ratios are experimented to determine the most effective extraction process with aspects such as recycling, mass balance, minimizing costs, and maximizing productivity and product quality in mind- Regeneration and reuse of barren organics; Scrubbing of the impurities from the loaded organic phase by solvent extraction was also performed- Gained experience in various concepts of mineral processing such as performing ball grinding and assisting in flotation of gold- Followed lab procedures with high degree of discipline to ensure quality results when for instance analyzing samples using XRF and Carbon-Sulfur analyzer and while performing multi-acid digestion and sodium peroxide fusion for ICP-MS and ICP-OES analysis

Toronto, Canada Area

- Collaborated as a “Chapter Builder” to reformat a General Chemistry interactive textbook for 1st year university students by discussing with the team on the content, compiling end of chapter quizzes and creating simulations to help the students apply concepts and assure knowledge acquisition- Displayed strong personal commitment to successfully meet all deadlines and to ensure the completion of the first fully interactive textbook authored for the Top Hat platform- Articulated the importance of student-to-student interaction, which has helped Top Hat to be a popular teaching platform with currently 75% of the top 1,000 leading colleges and universities in North America using its services

Bachelor’S Degree, Chemical Engineering Co-Op, Dean'S List (2015-2016)

Activities and Societies: Ryerson Oxfam Canada, Tri-Mentoring Program, RU Noted, Tetra Ryerson

High School, International Baccalaureate (Ib) Diploma

Activities and Societies: - Afghan Refugee Tutoring; - SPCA (Society for Prevention of Cruelty to Animals); - Global Action Program.