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Orchard Material Technology, LLC

Joseph D Lessard

Leonid Natan Shekhter

Daniel G Gribbin

Esra Cankaya-Yalcin

Lawrence F McHugh

Larry F McHugh

Copper is produced by a looping oxidizing process wherein oxidation of copper sulfide concentrate to molten blister copper by conversion with copper oxides (and optionally oxygen from air) in a one step, molten bath operation to produce molten blister copper, iron oxide slag, and rich SOoff gas. The blister copper is treated in an anode furnace to reduce the iron content and oxidize residual sulfur, and prepare it for either electrolysis or reoxidation.

Production of copper via looping oxidation process

A looping method for production of MoO, the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoOand oxygen in a first furnace to produce MoOand SO, removing a first portion of the MoOfrom the first furnace, transferring a second portion of the MoOfrom the first furnace to a second furnace, reoxidizing of the transferred portion of the MoOin the second furnace to MoO; and looping the MoOfrom the second furnace to the first furnace for use as an oxidizing agent.

Sulfide oxidation process for production of molybdenum oxides from molybdenite

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Medford, ME, United States of America

Joseph D Lessard