Levin Open Circuit Grindability Test
The Levin open circuit grindability test is used to establish the energy requirements needed for the fine grinding of ores. The test is undertaken using a standard Bond laboratory ball mill, with a standard Bond ball charge and operated under Bond test conditions. The test applies the equivalent energy consumption per minute for the Bond laboratory ball mill when operating under standard conditions to the time taken to grind an ore sample to a given %passing 75 microns, providing a figure for the energy required to grind to a given mill product PSD.
The Levin open circuit grindability test procedure involves multiple batch grinds over increased time using representative sub samples of ore. The product from each grinding test is analysed for particle size and the % passing 75 microns is determined, the time taken to grind to the target PSD is established, and applied to the equivalent energy consumption per minute for the Bond ball mill to give the energy requirements for the application in kWh/t.
The Levin open circuit grindability test requires a representative 10-15 kilo sample of ore. Sample mass is dependent on the relative density of the ore. The test is part of our range of comminution testing services.
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