Mine into GAC's operations

We operate a mining concession located in the northwest of the Republic of Guinea, in West Africa. Once mined, the ore is sent by rail to the company’s port facilities at Kamsar, on the country’s Atlantic coast, and then shipped by sea to world markets. Start your exploration here:

Mine

GAC’s 690-square kilometre mining concession is located between the towns of Sangaredi and Boké, in the northwest of the country. Bauxite deposits are found at or near the surface. The area to be developed before 2040 contains almost 400 million tonnes of bauxite mineral resources.  

The mine operates 24 hours a day, 365 days a year. Drill operators drill 140-millimetre blast holes in line with a predetermined plan. The blast holes are loaded with explosives and then detonated, which breaks the rock. The rock is then loaded onto trucks by excavators. Production truck drivers make the trip to empty their bauxite ore loads into a crusher, which crushes the bauxite to less than 100 mm, which allows easier handling and transport. The crushed bauxite product is then fed via a conveyor at a rate of 2,500 tonnes an hour to a rail-mounted stacker, which loads the product into one of two stockpiles (each with a 165,000-tonne capacity) located parallel to the railway track, in preparation for loading into rail wagons.  

Railroad

The ore trains consist of three locomotives and 120 wagons. Each wagon can hold 85 tonnes of ore. The train is loaded from the stockpile by a fleet of four front-end loaders. This load rate equates to less than two minutes per wagon. Every day, four loaded trains, each with 10,200 tonnes of ore, travel 90 kilometres to GAC’s port platform in Kamsar.  

Port

GAC’s port is all about handling and shipping overseas the bauxite produced by the company. When the trains of bauxite arrive at Kamsar, they are unloaded by a double tipper, which upturns two railcars at a time without detaching them. It takes less than two hours to unload a 120-wagon train. Depending on current needs, the bauxite is directed by conveyors to one of two destinations: the port for loading onto a barge, or the storage area.   

The storage area, with a capacity of 460,000 tonnes, is equipped with a powerful stacker-reclaimer that can stack or retrieve the product at a speed of 4,500 tonnes an hour.  

A network of underground and overhead conveyors is used to handle the bauxite, taking it to the barge loader located at the end of a 1.5-kilometre jetty. With a capacity of 5,000 tonnes per hour, it takes less than three hours to fill one of the company’s four 13,000-tonne self-propelled barges.   

The barge then leaves the port and heads to a transhipment location located 37 kilometres away, in deep water (the Guinean coast being shallow, Capesize vessels cannot be loaded at the port). Two floating cranes, equipped with clamshell grabs, are moored on either side of the Capesize vessel, allowing the bauxite to be unloaded directly from the barge into the export ship. These ocean-going vessels are approximately 300 metres long and 50 metres wide, or about the size of three football fields. They hold around 180,000 tonnes, which is the equivalent of 15 barge loads, and take four and a half days to load. Once fully laden, the vessel sets sail for the customer’s destination, and the crane operators shift their attention to the next scheduled vessel.