Sandvik Mining & Construction introduces a new crusher concept that combines both crushing and grinding capabilities into a single machine.
Comminution requires different machines and technology to carry out the whole initial crushing phase, followed by the grinding and milling course. Given the challenges of rising costs and lower investment, mines cannot afford the heavy cost burden of additional machinery.
Sandvik Mining’s new Vibrocone crusher not only provides 30% energy savings compared to traditional crushing and grinding systems, but also eliminates the need to invest in additional machinery.
The new Vibrocone produces a much finer mill feed, allowing the machine to handle the first stage of grinding in a dry process. The machine crushes particles between the liner surfaces in the crushing chamber, with the particles in turn also crushing each other in a high pressure inter-particle crushing action, giving the machine the ability to produce a P50=3mm mill feed.
Marcus Benn, Sandvik Mining Australia's regional product line manager for mining crushers and screens explains that crushers are typically ten times more energy efficient than mills. The Vibrocone's ability to offload work from the downstream milling process offers energy savings of up to 30%.
Benn describes the Vibrocone crusher as the next generation of crushing technology since it works by combining the best of conventional crushing and grinding principles to produce an unprecedented amount of finely crushed product. He adds that product from the Vibrocone crusher opens up the possibility for new eco-efficient comminution alternatives. Using a Vibrocone as part of the comminution process will considerably improve the efficiency and cost of downstream grinding.
The Vibrocone crusher and grinder went through a series of trials where it carried out more than 10,000 hours of commercial operations on copper, gold and iron ore mine sites to demonstrate its capability.
A greenfield case study of a 10-million tonne per annum copper operation in South America carried out by Ausenco has shown that the Vibrocone solution is the lowest cost option, with energy savings in the range of 20% relative to the SAG mill alternative.
The first Vibrocone machine in Australia is the 400 kW CO865, which has a capacity of 200-300 tonnes/hour, top feed size of 150mm and product sizes of 80% passing 6mm – 8mm and 50% passing 2mm – 4mm.