طراحي و ساخت آسيايي جهت تعيين شاخص توان (spi) آسياي نيمه خودشكن -مطالعه موردي : آسياي نيمه خودشكن (sag) مجتمع مس سرچشمه

Designing and constructing a grinding mill for SPI determination - Case study: the Sarcheshmeh copper mine SAG mill

As the capacity of processing plants increases, the use of SAG mills increases mainly due to improving the comminution circuit efficiency and also a significant reduction in the grinding costs. SPI test (SAG Power Index) was introduced by Minnovex, a mineral processing company in Canada, in 1993 to provide some information about ore hardness and power consumption for mill designers. A grinding mill was designed and constructed to determine SPI at the Sarcheshmeh copper complex. In order to perform SPI tests 10 kg samples were taken from the conveyer belt feeding the SAG mill. Considering some important operational parameters influencing power draw of SAG mills such as ore hardness, product fineness, mill filling and mill liners condition a semi empirical power model was proposed. Finally the model was validated using an independent sample. It was found that the error of the model was 2.5%.