Close-up of high-grade ore face in Granduc Mine. This is massive chaicopyrite, a sulfide of copper and iron, but such rich concentrations are relitively rare.




 


 



Granduc is situated at the base of the mountain
GRANDUC IS SITUATED AT THE BASE OF THE LARGE MOUNTAIN.


Granduc - The Mine in Operation cont...

SHIPPING FACILITIES

Ocean-going steamers as large as 50,000 tons unload fuel oil or take on copper concentrates at the marine terminal in Stewart.After completing the 30-mile haul to Stewart over the road built by the Granduc company, which also bore the entire cost, the concentrate trucks end their run at a complete marine-terminal, self-supporting with respect to all facilities and built to load out concentrate to ships of 50,000-ton class and to receive heavy fuel oil from tankers of the same size.

The terminal was designed to handle three products.

1. Outbound concentrate: indoor truck receiving, stockpiling by front- end loader, covered storage for 15,000 tons, reclaim through floor grizzly, and conveyor transfer at 500 t.p.h. to a non- traveling, slewing shiploader. Berth face is 800 feet long dredged to a 4O-ft. minimum water depth at low tide.

2. Inbound heavy fuel oil: unloading by ships' pumps to two 90,000-gal., heated, storage tanks and tank-truck loading for the return trip to the mine.

3. Inbound lime pebbles: unloading by barge-mounted, pneumatic, conveyor system to two 300-ton silos and gravity loading into truck-mounted boxes for transportation to the concentrator.

A service building, 62 ft. by 38 ft., contained twin hot-water boilers and circulating pumps for tank heating and two diesel generators rated at 300 and 350 k.w. for utility power together with related auxiliary equipment and switch- gear, there being not enough B. C. Hydro power available. Fire protection was provided by well water on the site to a 12,000-gal. above-ground tank.

 

 

 

 

 


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