The International Nickel Company, Inc.

Rotrou A Hall

Gerald Vernon Glaum

Kohur Nagaraja Subramanian

Kohur N Subramanian

William Edward Jones

Anode slimes from an electrorefining operation are fed, together with sulfuric acid, into a heated pelletizer wherein a sulfation reaction occurs, simultaneously with pellet formation, to solubilize copper, nickel and tellurium contained in the slimes.

Pelletizing sulfation of anode slimes

A titaniferous ore concentrate or slag is fed, together with sulfuric acid, into a heated pelletizer wherein the sulfation reaction occurs simultaneously with pellet formation.

Pelletizing sulfation of titanium concentrates

Sulfate solutions containing at least one valuable metal from the group: Fe, Ni and Co, particularly solutions resulting from the leaching of lateritic ores or concentrates, are treated to recover the valuable metal. The latter is precipitated by treating the solution with magnesium hydroxide. The resulting magnesium-containing solution is treated with lime under controlled conditions to precipitate relatively fine particles of magnesium hydroxide and relatively coarse particles of gypsum. The difference in particle size is relied on to separate the magnesium hydroxide (for recycling) from the gypsum (which is calcined to regenerate lime).

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Mississauga, Canada

Rotrou A Hall