Froth Slurry Handling
Froth includes air which affect pump performance reducing developed head and flow, it also can increase wear on pump parts.
For froth slurry handling, we have two choice:
1.When use traditional slurry pump
a) typically use large froth factor (multiples of design flow rate)
b) oversized to handle large air volume
c) operates well to the left of the best efficiency point
d) often utilizing open or recessed impeller
e) corresponding low efficiency
2. When use typical froth slurry pump, it has the following features:
a) very large inlet configuration
b) unique flow inducer impeller design
c) inlet sized for aerated volume flow, discharge sized for design flow
d) based on the exist standard slurry pump
e) easily convertible to or from enclosed impeller pump design
Calculation of Froth Volume Factor (FVF)
Example: 20% air volume
FVF = 1/(1-0.2)
FVF = 1.25
Recommendations to maximize system performance:
a) Minimize pump speed by designing system with low system head
b) Minimize enter of air in sump by use of launders and tangential inlets
c) Maximize release of air by use of baffles, spray mists, vent pipes, enlarged eccentric suctions, proper casing orientation
d) Maximize NPSHa
e) Select appropriate pump for the duty
f) Preferably select pump with NPSHr less than 12 to 14 ft at aerated flow rate
g) Avoid parallel pumping
h) Don’t over speed pumps: utilize VFD to maximize control of system
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Contact Person：Michael
Email: Sales@bmxslurrypump.com
Tel:+86-311-68075188
Whatsapp: +86-15373941897
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Technical support: Xinwang