Optimisation of air rate and froth depth in flotation using a CCRD factorial design – PGM case study

摘要: Abstract Air rate and froth depth are the most commonly adjusted levers in PGM flotation plants. The optimisation of these on each cell has traditionally been done by varying either air at a fixed or vice versa. This approach does not consider interaction relationship between this effect performance. Factorial type experimental designs best suited for investigating effects variables. paper presents use factorial design being (CCRD) Central Composite Rotatable Design plant scale depth. results obtained include three dimensional response surfaces models variables such as 4E recovery grade function level. illustrates methodology discusses normalised rougher treating Platreef ore. These indicate that significant more pronounced conditions higher shallower In addition, indices which based an objective multiplied and/or squared allows application technique tool. can be used to determine optimum operating range level with consideration effects.