Indresco Inc.

Harbison-Walker Refractories Company

Indresco Canada, Inc.

Jean-Guy St-Hilaire

George W Bennett

Maxime Leduc

Christian Garceau

Tony Grondin

A method and apparatus system are disclosed for the beneficiation of kish to produce coarse high purity graphite wherein a concentrate containing at least about 90% carbon is formed, treated with a dilute acid solution, and the pulp then subjected to an adjuvant-assisted attrition to form a novel synthetic flake graphite of 99+ wt. % carbon with at least 70% of the mass retained on +100 mesh, and an overall recovery of graphitic carbon from the feed of greater than 85% by weight.

Beneficiation of kish graphite

A apparatus system is disclosed for time beneficiation of kish to produce coarse high purity graphite wherein a concentrate containing at least about 90% carbon is formed, treated with a dilute acid solution, and the pulp then subjected to an adjuvant-assisted attrition to form a novel synthetic flake graphite of 99+ wt. % carbon with at least 70% of the mass retained on +100 mesh, and an overall recovery of graphitic carbon from the feed of greater than 85% by weight.

Apparatus system for beneficiation of kish graphite

This invention concerns a method of beneficiating graphite to a higher purity level by dislodging the impurities from graphite by attrition preferably in an attrition cell which has at least one set of opposing pitched impellers. A pulp is formed preferably essentially consisting of a flake graphite:attrition adjuvant:water in a ratio of 1:2:0.8 to 10 and this pulp subjected to attrition in an attrition cell.

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St. Antoine, Canada

Jean-Guy St-Hilaire