Classifying – separating – and assorting solids – With heat treatment
Reexamination Certificate
2004-09-28
2009-08-11
Bos, Steven (Department: 1793)
Classifying, separating, and assorting solids
With heat treatment
C209S214000, C423S025000, C423S074000, C423S148000, C423S151000, C075S010130, C219S678000, C219S686000, C219S690000, C219S756000, C034S259000, C034S265000
Reexamination Certificate
active
07571814
ABSTRACT:
Methods and apparatuses for separating metal values, such as nickel and nickel compounds, from mineral ores, including lateritic ores are disclosed. The method includes providing a mixture of particles (e.g., crushed and sized ore) that is composed of at least a first group of particles and a second group of particles. Group members have similar chemical composition, while particles belonging to different groups have dissimilar chemical compositions. The mixture of particles is concurrently, or generally concurrently, heated (using microwave/millimeter wave energy) and exposed to a reactant. The wave energy and the reactant act to increase the difference in either the magnetic susceptibility or other separation properties between the first and second group of particles. The mixture of particles is then passed through an appropriate separator to separate the particles of interest. Optional steps are disclosed for purifying selected particles. The reactant includes sulfur, sulfur compounds, halogens, or halogen compounds.
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Bos Steven
Honigman Miller Schwartz & Cohn LLP
Wave Separation Technologies LLC
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