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 Expert  721944

Expert in Extractive-Metallurgy, Hydro-Metallurgy, Pyro-Metallurgy, Inorganic Processing and Soil and Waste Remediation

Available for your Consulting and Expert Witness Needs

Colorado (CO)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
Expert has been active in the field of extractive metallurgy for more than 42 years. He has developed processes for the recovery of many metals including antimony, arsenic, barium, bismuth, boron, chromium, cobalt, copper, gallium, germanium, gold, lead, lithium, magnesium, manganese, molybdenum, nickel, niobium, radium, rare earths, rhenium, silver, tantalum, titanium, tungsten, uranium, vanadium, and zinc. He holds about ten patents with others pending. He has experience in roasting, smelting, leaching, solvent extraction, ion exchange, crystallization, precipitation, and electrodeposition.

extractive metallurgy




nonferrous metal recovery

Expert has been involved with process development for the gold industry for more than 25 years. He performed the laboratory work for the design of some of the first United States heap leaching operations and performed the laboratory studies that led to the first pressure oxidation facility in the United States. He also conducted laboratory programs on the roasting and cyanidation of gold ores.

gold recovery

Expert has helped develop a number of processes for the recovery of metals from wastes and intermediates. These include uranium from machining sludges, metals from spent catalysts, lead from soils, and mercury from soils and wastes.

metal recovery

Expert has performed numerous laboratory programs on the development and evaluation of soil remediation techniques. These include thermal processing, biological remediation, soil washing, and stabilization. One many of these projects, Expert provided consulting assistance during the on-site remediation.

soil remediation

Expert began working for the extractive uranium industry in 1960 and has participated in all areas of uranium processing. These include ore flotation, roasting, leaching, ion exchange, solvent extraction, precipitation, and crystallization. Expert had technical responsibility for the first two in-situ uranium leaching pilot plants in the United States and has perfromed laboratory studies or consulted for more than fifty operations.

uranium processing

Expert built his first solvent extraction pilot plant in 1960 and has built or operated more than 50 pilot or commercial plants since that time. Metals processed include boron, chromium, cobalt, copper, gallium, germamium, molybdenum, nickel, niobium, rare earths, tantalum, uranium, vanadium, and zinc.

These plants have included conventioinal mixer settlers, centrifugal contactors, and packed columns for processing slurries.


solvent extraction


liquid-liquid extraction

Expert has been associated with vanadium processing since 1959. This experience includes participation in the development of commercial processes for the productioin of vanadium trioxide, vanadium carbide, vanadium oxychloride, and vanadium tetrachloride. He operated commercial facilities for the manufacture of vanadium oxychloride and vanadium tetrachloride.

vanadium oxide

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Denver, Colorado;  Colorado Springs, Colorado;  Aurora, Colorado;  Fort Collins, Colorado;  Arvada, Colorado;  Pueblo, Colorado;  Westminster, Colorado;  Boulder, Colorado;  Greeley, Colorado;  and Longmont, Colorado.

Often requested
with this expert:

Hydrometallurgy, Pyrometallurgy, and Extraction and...
Engineering: Mining, Minerals, Metallurgy, Chemicals,...
Process Engineering and Chemistry of Inorganic Chemicals
Industrial Minerals, Glass Raw Materials,Glass Sand

Year   Degree   Subject   Institution  
1959   M. Sc.   Industrial Management   University of Colorado, Boulder  
1957   Met. Engr.   Extractive metallurgy   Colorado School of Mines  

Work History:
Years   Employer   Department   Title   Responsibilities

2000 to







He is responsible for providing research, development, and consulting services to the mineral, inorganic chemical, and environmental industries.

1995 to 2000


Colorado Minerals Research Institute



Vice President


Expert provided research, development, and consulting services to the mineral, inorganic chemical, and environmental industries.

1990 to 1995


Industrial Compliance Technologies





Expert was responsible for providing research, development, and consulting services to the mineral, inorganic chemical, and environmental industries.

1969 to 1990


Hazen Research, Inc.



Vice President


He provided research, development, and consulting services to the mineral, inorganic chemical, and environmental industries.

1959 to 1969


Union Carbide Corporation


Metals Division


Group Leader


Expert provided research, development, and consulting services to mining and processing operations of Union Carbide.

Career Accomplishments:

He is a member of the American Chemical Society, Society of Mining, Mineral, and Exploration, The Metallurgical Society, and The American Association for the Advancement of Science.

Publications and Patents Summary

He has 32 publications, 10 patents, and has contributed to chapters in three books.

Selected Publications and Publishers  
 - Waste Management  
 - The Metallurgical Society  
 - Engineering and Mining Journal  
 - Metallurgical Society of CIM  

Consulting Services:
Selected Consulting Examples:
  • In 1999, he participated in the start-up of a boron solvent extraction circuit in Chile. His efforts included on-site process testing and modification to permit successful chemical performance.
  • In 1985, he participated in a thorough review of the Atlas Gold Bar gold mill. The review corrected a number of operating problems and allowed for higher recovery of gold at a lower cost.
  • He provided on-site review of under-construction process flowsheet for processing of nickel/cadmium wastes. Numerous faults were found and not corrected by the client. The plant was not able to start-up successfully and was abandoned.
  • He performed laboratory testing and plant pilot testing for revision of ammonium metavanadate crystallization circuit.
Recent Client Requests:
  • Expert for consulting on LLX.
  • Molybdenum recovery expert for consulting on molybdenum recovery from hydrotreating catalyst process design.
  • Metallurgy expert for consulting on vanadium and nickel recovery.
  • Expert in chemistry for consulting on extracting metals from the Mo leaching process.
  • Expert in Tungsten processing
  • Expert for consulting on Vanadium
  • Electrometallurgy expert to assist with designing scalable process specific Ore and Concentrate
  • Expert in metallurgy uranium extraction from tantalite for consulting on uranium extraction from tantalite ore.
  • Expert in fuel oil residue for consulting on vanadium recovery from heavy fuel oil ashes.
  • Expert in water resource management for consulting on remediation of a complex groundwater contamination situation.
  • US Gold Mining expert for consulting on gold mining project.
  • Semiconductor expert for consulting on boron removal in p+ semiconductor grade silicon.
  • Expert for consulting on Gold Recovery
  • Mining expert to assist with feasability study.
  • Expert for consulting on Utilizing principles of LLX to remediate Acid Mine Drainage (AMD).
  • Expert in process engineering for consulting on a short site survey of a tantalum mine in Ethiopia.
  • Hydrometallurgical treatment expert for consulting on pyrometallurgical treatment of battery waste and EAF dust.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Expert Witness Experience Summary:
He prepared information for a corporate plaintiff for negligence case against a contractor. The case is still pending and direct testimony has only been by deposition. He also provided expert testimony in a case of fraud relative to a gold mining prospect.
Recent Litigation Client Requests:
  • Scrap metal expert for consulting on HMS 1 and 2 and 3B identification from digital photos in compliance with CPR35 rules.
  • Gold mining expert for consulting on securities class action regrding giving false information to investors.
  • Expert for consulting on Mercaptan Litigation.
  • Solvent extraction expert for consulting on litigation involving new plant construction.
  • Heap leach mining expert for consulting on a patent covering the application of drip irrigation.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
2000 to 2001   Chile   He is serving as a consultant to a Chilean firm providing waste stabilization services.
1996 to 1998   Chile   He designed a process for recovery of boron from dilute brines and participated in the plant start-up.
1972 to 1972   Brazil   He provided the technical input for the design of an extractive metallurgical research facility in Rio de Janeiro.
1970 to 1973   Chile   He participated in the development of a process for recovering rhenium and molybdenum from molybdenite concentrates. He prepared mass balances and equipment lists for preliminary engineering of the commercial plant and consulted with the Chilean engineering firm on the detailed design.

Additional Skills and Services:

He has prepared and delivered presentations for a summer course on mining and related fields in the areas of hydrometallurgy and recycling.

Supplier and Vendor Location and Selection

He maintains extensive files on process equipment and on numerous occasions has put clents in contact with the most appropriate vendors.

Other Skills and Services

He has prepared a number of market studies relative to opportunities for products within the metal and inorganic chemical fields.


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