An engineering, procurement and construction management contract for a mill rationalization program was recently awarded to Wright Engineers and Fluor Daniel by Inco Ltd. The program, which is expected to take about 2 years to complete, will consolidate the Frood-Stobie, Clarabelle and Copper Cliff mills in Sudbury, Ont.
Inco’s objectives are to reduce sulphur dioxide emissions and increase operating efficiency. The Frood-Stobie mill will be closed and only concentrate dewatering and storage facilities will remain at Copper Cliff.
The Clarabelle mill will be expanded and upgraded to handle all the ores for Inco’s Sudbury area mines. A single bulk copper-nickel concentrate will be produced, avoiding selective flotation and facilitating pyrrhotite rejection. Mill capacity will be increased from 32,000 tons per day to 40,000 tons per day through the installation of a semi-autogenous grinding (SAG) circuit and large flotation cells.
To meet the objective of sulphur dioxide abatement, the program provides for the separation and rejection of increased quantities of high sulphur-bearing pyrrhotite. It is intended to reduce pyrrhotite content in the concentrate from 21% to a target 15%.
The capital budget for Wright’s scope of work is about $65 million, and project services will be executed from its Toronto office. Since mid-August, Wright Engineers became part of the Fluor Daniel organization. .N3
** Allota drilling **
Drilling has started on Alotta Resources’ (VSE) Dennison Falls gold property in the Mishibishu Lake area west of Wawa, Ont. The 10,000-ft program will test several geochemical anomalies and surface showings.
On the Glider zone, drilling will test a surface showing which assayed up to 0.4 oz gold per ton in grab samples. The Chucklee zones are also priorities. Both are magnetite-rich iron formations which are mineralized with arsenopyrite and pyrrhotite.
Another eight geochemical targets displaying coincident gold and arsenic values, will also be drilled. Alotta is controlled by Tundra Gold Mines (VSE).
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