Inco Limited

The International Nickel Company, Inc.

Gl&v Process Equipmet Group Inc./gl&v - Groupe Equipment De Procedes Inc.

Gl&v Process Equipment Group Inc./gl&v--groupe Equipement De Procedes

Reichel A Tenbergen

David A Landriault

Richard A Farmery

Eberhard Krause

Justin Raskauskas

Yoshiaki Okita

Brian Charles Blakely

The process provides a method of removing arsenic from solutions containing sulfur dioxide in an environmentally acceptable manner. This process first oxidizes arsenic, iron and sulfur dioxide contained in an aqueous solution to prepare the solution for precipitation and to improve process control. Recycled neutralized precipitate seeds the oxidized aqueous solution. A calcium-containing base precipitates products of neutralization on the seeds. The final neutralized precipitate contains a stable ferric arsenate compounds.

Removal of arsenic from iron arsenic and sulfur dioxide containing

The apparatus provides a unique and novel vessel and process that concentrate solids, produces paste and stores paste from mixtures of solids and liquids. The vessel or tank includes a vertical shaft mounted within the tank and a variable speed drive for rotating the shaft for circulating paste. The shaft includes a helical pump for lifting the paste and a rake arm extending outwardly from a lower portion of the shaft for moving the paste radially inward. A vertical flow director within the tank is connected to the shaft for maintaining paste flow and facilitating paste circulation at outer portions of the tank. A paste exit port through a lower portion of the tank is used for removing paste. The method forms a paste by first introducing a mixture of solids and liquids into a tank. A portion of the solids and liquids are lifted vertically to establish a circulation pattern within the tank. The circulation of the mixture of solids and liquids is maintained within outer portions of the tank with at least one flow director. The mixture of solids and liquids is then circulated at a controlled rate to form paste.

Paste production and storage process

Paste production and storage apparatus

An improvement in the process of flotation of sulfide minerals from basic gangue involving employing in association with a collector an alkylamidohydroxylated quaternary amine salt.

Flotation process

Growing community of inventors

Hanmer, Canada

Reichel A Tenbergen