SPECIALIST EQUIPMENT
which monitors pressure, power draw and mainshaft position and adjusts the settings accordingly. Protection from damage is provided
by the Hydroset main shaft support system. Tis is designed to allow any uncrushables to go straight through, before everything goes back to its original setting. Wear compensation in the crushing chamber is done automatically to give even product size. Christoffersson explains, “Hydroset enables us to incorporate our unique PLC-controlled electric dump valve for tramp iron protection, which significantly reduces pressure peaks and mechanical stress on the crusher, greatly improving reliability.” Te test phase lasted nearly a
year in an iron ore mine in China. Christoffersson adds, “In these challenging times mines are often looking for increased productivity without necessarily expanding their plant. Sandvik CH860 and Sandvik CH865 are easy to install as replacements to achieve this. In the test site we replaced a similar sized crusher, on the same foundation, to greatly increase final product and significantly extend crushing chamber liner life. Te electric dump valve
repeatedly proved its tramp iron protection value, reducing costly unplanned breakdowns.”
You got the power Powerscreen has announced that it
Less shock and ore I
MA has launched a new version of its FCA (Fast Conveyor Analyser), ore-grade loading control system. Te machine creates an alarm by contacting the operator’s mobile phone if lower than cut-off ore enters the crusher. Te company claims lump size up to 400mm will not affect accuracy. Pile grades can be checked via an instant trend display, and 30
Sandvik’s CH865 is a medium-sized cone crusher that’s specially designed for high-reduction tertiary and pebble crushing.
minute, 60 minute and longer time averages can be calculated.
Run of mine ore in piles are
verified by dumping two loads into the crusher and then by checking the grade from the trend, with results in minutes.
Tis new version of the FCA system was tested in a copper mine and over several weeks then compared to the incumbent Courier analysis system, with a correlation of 92% for the material. l
www.engineerlive.com 47
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