starkey & associates uses the patented sagdesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples. sagdesign technology has become a standard for 21 st century grinding circuit design for the following reasons: precisely measures sag and ball mill ore hardness
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a rapid sag mill grindability and mill sizing analysis program abstract starkey & associates inc. completed a feasibility level grinding study in six weeks on mid-scale gold project. this paper will describe the testwork campaign and the steps taken to facilitate a rapid analysis dyke required 60% more sag grinding energy to reach a d 80
background. starkey & associates (s&a) was established in 2000 incorporated in 2009 and is now recognized as a global leader in sag mill grinding circuit design. in 2002 john starkey invented the sagdesign test. although the foundation of the test was based on his practical engineering experience it was in collaboration with dawson
after the first grinding target is reached (i.e 60% -1.7 mm) both the fine and coarse materials are returned to the mill for the remainder of the sag mill grinding cycles to reach the 80% -1.7 mm test end point. a typical sagdesign sag test grind curve is illustrated below. where:
choosing a sag mill to achieve design performance john starkey1 principal consulting engineer sami hindstrom2 manager grinding travis orser2 project manager grinding 1 starkey & associates grinding design and process engineering 336 – 268 lakeshore rd. e. oakville ontario l6j 7s4