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floatation cells with cameras

floatation cells with cameras

Science in the art of flotation Froth cameras allow operators ...

While froth cameras have been around for close to two decades, the technology has leaped forward in recent years. One of the problems with the older software, for example, is related to using only one area of interest, typically near the lip of the cell. The velocity of the froth varies within the cell, slower in the centre, and faster near the lip. Different factors, including buildup in some areas can also result in speed variations. While it is still possible to mathematically calculate the overall froth speed, this was not always properly done with older systems. This was one of the issues that led Copper Mountain Mine near Princeton, B.C., to hire Portage to upgrade its controls system, including its existing froth camera system. Basically, you end up with froth thats turning around on the surface and has an apparent velocity in the area of interest, but its not actually being pulled because the froth level is lower than at the lip, says Mike Westendorf, the mines mill su...

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A top challenge that remains is choosing the right camera system, according to the representatives for mining companies with new froth camera systems we interviewed. There are a number of different types of cameras on the market with quite a difference in pricing, so determining the particular style of camera to install and deciding on the company to deliver results is one of the most difficult challenges, says Noel Moffatt, instrument and process control superintendent for Barricks Papua New Guinea operations. As well, for mines such as his that had no previous experience with froth cameras, it is imperative to find a supplier that can provide in depth education on the technology. From considering the material of the brackets that hold the cameras to minimize corrosion to how they are positioned to avoid vibration or direct sunlight, careful installation is critical to both the longevity of the cameras and the quality of the images they capture. Customer service, says Fulton, is...

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On average, a good froth camera system can result in about a one per cent increase in production, says Araujo. Penhorwood mine began its froth camera installation last year in mid November. Within a couple of months, the mine was already seeing notable improvement. Its working better than we were expecting it to work, says Fulton. Basically, your production rate goes up. In our case, if we throw 100 tonnes of rock into a plant, we used to be happy with a 30 per cent yield. Now, we get 35 tonnes of product for the exact same cost. One of the goals the operations team at Copper Mountain had, when it upgraded its controls and froth camera systems, was to increase production consistency between shifts. With the new system, says Westendorf, the mine was able to reduce the variation in production level between crews to one percent from three or four per cent. These days, the return on investment can be remarkably quick due to a combination of the improved technology as well as the lo...

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