Back Pressure Pipe
Typically banks of flotation cells are designed to have a standard step height from cell-to-cell to facilitate the gravity flow of slurry downstream. In the final flotation cell the step height increases by order of magnitude often resulting in severe instability and total loss of slurry level control.
To improve level control performance in the final cell and to reduce the pressure drop across the final dart valve, a back pressure pipe (or goose neck) with a dart valve incorporated, is used to artificially reduce the step height resulting in dramatically improved level control & mass pull in the final float cell.
- Slurry mixing (homogenous slurry vs separation of particles by size / density)
- Slurry velocity impact on wear & maintenance
Mechanical design is then iteratively improved until optimized.