Slower speed means better economics.

In centrifuge operation, slower rotating speeds can significantly increase the operational life of expensive components (Figure A) and reduce the risk of machine failure. Lower speeds can also mean reduced energy requirements (Figure B).

Figure A

Figure B

Thicker cake means a more pure cake.

Cake thickness increases in proportion to increased basket length (see Figure C). A thicker cake is more pure than a thinner cake because impurities typically tend to collect near the screen surface. The impurities layer represents less of the total cake volume in a thicker cake than in a thinner one, having less effect on average purity.

Single-stage systems yield a more pure cake than two-stage systems.

Two-stage systems tumble cake from one stage to the next, mixing the less pure material back in with the more pure cake (Figure D) requiring higher wash rates. Tumbling further degrades particles and causes additional loss of fines to the centrate. B&P's single-stage system doesn't mix the more impure layer back in with the rest of the cake, minimizing wash flow rates and resulting in less particle breakdown with fewer fines lost.

Figure C

Figure D