Research on Enhancing Productivity of SAG (SAG)Mills through Optimizing Filling Percentage
The large-scale 8.53m×3.96m (28×13 F/F) SAG mills was first applied in Donggua Hill Copper Mine which processes 13,000 tons ore per day. The crushing and grinding circuit went into operation in the Donggua Hill plant in October 2004. However, at the beginning, the productivity of grinding only reached 58% of the capacity expected and some indexes of the crushing and milling circuit didnt meet the requirements. Especially, the total load of the 8.53m×3.96m (28×13 F/F) SAG mills was up to 34%～41% (25%～30% designed)and some hard rocks with the size of 25～70mm, which cant be treated as a medium or even would be crushed and make larger ores or steal balls necessary, were seriously accumulated in the SAG mills. Consequently, they occupied the effective mill volume which in turn reduced the efficiency of the SAG mills and increase the energy consumption. In order to solve the problem of accumulation in the SAG mill and increase its productivity, some measures were taken, such as passing more hard pebble through the grate at mill discharging end, changing the type of steal balls and so on. And the results showed that these measures functioned well and had good effects, which is that the filling percentage of the SAG mills has been reduced to 26%～29% from 34%～41% with the composition of particle sizes improved a lot and the productivity increased by 77.4% reaching up to 13,380 tons per day.
SAG mill Productivity Filling percentage Optimizing
G. Y. He Y. H. Hu
Donggua Hill Copper Mine, Tongling, China School of Resources Processing and Bioengineering, Central South University, Changsha, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
618-626
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）