Resume

• 20160138867

  Feed flow conditioner for particulate feed materials

• 1992

  English

  French

  Persian

  Doctor of Philosophy (Ph.D.)

  Chemical Engineering

  University of Toronto

• 990

  System and method for producing high purity particulate graphite using carbochlorination in an electrical resistance heated fluidized bed reactor

  62/613

• 724

  Plug Flow Reactor with Internal Recirculation Fluidized Bed

  A patented process and reactor for arsenic fixation in a first gas stream which comprises oxygen and an iron-containing particulate material. The oxygen and particulate material may be fed to reactor through respective first and second inlets. A second gas stream containing one or more volatile arsenic compounds is fed through a third inlet and mixed with the first gas stream and the particulate material to produce a combined gas stream containing the volatile arsenic compounds and the particulate material. The arsenic compounds are reacted with iron in the particulate material as the combined gas stream flows through the reactor to produce solid iron arsenates which are then recovered.

  Process and Reactor for Arsenic Fixation

  A feed charging device comprises a holding vessel having an interior chamber for holding a reserve of a solid particulate feed material in a fluidized state

  wherein the feed material is held in said fluidized state in a lower zone of the interior chamber. The feed material is supplied to the interior chamber through at least one outlet opening

  and is discharged from the interior chamber through at least one outlet opening. The at least one outlet opening is in flow communication with the lower zone of the interior chamber. A gas supply means supplies a fluidizing gas to the lower zone of the interior chamber

  and an outlet conduit in flow communication with the at least one outlet opening receives said feed material discharged from the interior chamber.

• 719

  A patented process for regenerating an aqueous acid halide leachant from a spent aqueous metal halide leach liquor. The process comprises introducing into a fluidized bed or spray roaster a hydrocarbon fuel

  an oxygen-enriched oxidizing gas and the aqueous metal halide leach liquor; pyrohydrolyzing the aqueous metal halide leach liquor by combustion of the hydrocarbon fuel with the oxygen-enriched oxidizing gas to produce an acid halide-containing gas fraction and a metal oxide-containing solid fraction; separating the gas fraction from the solid fraction

  recovering heat energy from the acid halide-containing gas fraction and absorbing the gas fraction in water to produce the aqueous acid halide leachant.

  Process for Regeneration of Acid Halide Solutions

  This patent relates to plug flow

  fluidized bed reactors

  and particularly to such reactors in which the product zone and feed zone are separated by one or more underflow weirs to permit internal recirculation of material from the product zone to the feed zone. The patent also relates to methods of using such reactors to process a variety of particulate materials.

• Theoretical modeling and experimental investigation of film boiling and rewetting at different gravity and flow conditions

  A theoretical and experimental study of film boiling and surface rewetting was conducted in order to elucidate the hydrodynamic effects of the interfacial phase change

  gravity level and flow conditions on the phenomena. The theoretical part of this study has improved the available hydrodynamic stability models for liquid-vapor interfacial stability with phase change for modeling the film boiling phenomena.

  Chemical Engineering

  Copper

  Process Control

  Equipment Design

  Engineering

  Pilot Plant

  Feasibility Studies

  Fluidization

  Minerals

  Process Optimization

  Process Simulation

  Commissioning

  Mining

  Process Management

  Nickel

  Metallurgy

  Process Development

  Process Engineering

  Mineral Processing

  Process Design

  Mineral Processing Plant's Debottlenecking Through Process Modeling

  Mineral Processing Plant's Debottlenecking Through Process Modeling

  Recovery of Heavy-Metal Values from the Industrial Spent Catalysts

  Two-Stage Fluid Bed Reactor for Arsenic Removal and Fixation

  Energy Recovery in the Metal Chloride Pyrohydrolysers

  Energy Efficient Fluidized Bed Systems

  Process Modeling of the Fluidized Systems Used for Charge Preheating in the Energy Efficient Electric Furnaces

  Recover heat from hot solids

  For use in many existing and emerging applications

  the purification of natural graphite is required to achieve +99.9% carbon content with minimum metallic impurities. Currently

  the hydrofluoric acid process is used

  which carries certain environmental and workplace health and safety impacts. Thermal purification of graphite at temperatures over 2

  500 C is a known alternative

  however

  such high-temperature furnaces are expensive to build and operate. Using chlorine at lower temperatures to purify graphite is also known and patented

  but is currently limited to treating solid synthetic graphite shapes in small-scale batch furnaces. Chlorine treatment of natural flake graphite resources can be used commercially

  if certain drawbacks are addressed through process improvements that can be helped with the use of fluidized bed reactor technology.

  Natural Graphite Purification through Chlorination in Fluidized Bed Reactor

  HCl Acid Regeneration for Chloride Based Hydrometallurgical Processes with Minimum Environmental Impact

  Energy Consumption for Iron Chloride Pyrohydrolysis: A Comparison between Fluidized Beds and Spray Roasters

  Classify Particles Using Fluidized Beds

  A Success Path from Process R&D to Commercial Plants

  Minimizing Fuel Costs During Thermal Regeneration of the Hydrochloric Acid Lixivant

  Study of transition boiling heat transfer in quenching of a flat surface using surface temperature and heat flux microsensors

  Process Design Considerations for the Fluidized Bed Technology Applications in the Nickel Industry

  Gold Concentrate Roaster for Sulphur

  Carbon and Arsenic Removal

  Copper concentrates contain an increasing amount of arsenic

  as the older sources of cleaner ores are depleted. At the same time

  the market-determined price penalties on arsenic rich concentrates are rising due to limited arsenic treatment capacity at smelters and increasingly stringent environmental emissions limits

  necessitating arsenic removal from the copper concentrates. Heating the concentrate to about 700°C can remove significant amounts of arsenic (as elemental and/or sulfide); however

  it is important to achieve that removal economically and with due consideration to post-roasting arsenic (toxic waste) treatment. A comparison is made among different roasting options (kilns

  multi-hearths and fluid beds) to qualify their potential application to arsenic roasting of copper concentrates. Both direct and indirect methods of heating as well as inert

  air and oxygen atmosphere options are considered. Technology comparisons are made with respect to the roaster’s operation

  its off-gas treatment and arsenic stabilization.

  A Comparison of Roasting Technologies for Arsenic Removal from Copper Concentrates

  Modeling and process features of plug flow reactor with internal recirculation for biomass pyrolysis

  Three dimensional computational modeling of particulate solids segregation and elutriation in a commercial scale fluidized bed classifier

  Fluidized Bed Technology Applications for Nickel Extraction

  Kamal

  Adham

  Canadian Institute of Mining

  Metallurgy and Petroleum

  Hatch

  University of Toronto

  Mississauga

  Ontario

  Canada

  Metals and minerals processing plants' design and improvements.

  Senior Process Engineer

  Hatch

  Canada

  Chairman of Publications

  Metallurgical Society - Board of Directors

  Canadian Institute of Mining

  Metallurgy and Petroleum

  Mississauga

  Ontario

  Canada

  Group Manager and Technical Director

  Director of Fluidization Technology Group

  Hatch

  Toronto

  Canada Area

  Modelling Chemical and Biological Systems

  Lecturer

  University of Toronto

  Mississauga

  Ontario

  Canada

  Director of Fluidization Technology

  Hatch

  Previous processes have achieved limited commercial success

  because of the costs associated with high reagent consumption

  long furnace retention times

  batch processing and the requirement for catalysts and other chemicals. Also

  often a high purity level was not achieved

  or the corrosive nature of chlorine at high temperature caused mechanical and structural problems. This patent application aims to provide a solution to address those issues.