1. Naipu® NP-ZJD Centrifugal slurry pump
The centrifugal slurry pump utilises the centrifugal force generated by a rotating impeller to impart energy to the slurry in the same manner as clear liquid type centrifugal pumps.
Centrifugal slurry pumps need to consider impeller size and design, its ease of maintenance, the type of shaft seal to be used and the choice of the optimum materials. This is needed to withstand wear caused by the abrasive, erosive and often corrosive attack on the materials.
The centrifugal slurry pump must be designed to allow the passage of abrasive particles which can at time be extremely large. Slurry pumps therefore need much wider and heavier impellers to accommodate the passage of large particles. They must also be constructed in special materials to withstand the internal wear caused by the solids.
2. Slurry pump structural
ZJD slurry pumps are suitable for pumping slurry with hard particles and in high density in industrial sectors. They can also be applied multi-staged in series.
ZJD pumps are those of cantilever, horizontal and centrifugal ones, whose shafts can be sealed by packing seals or by centrifugal type seals. The positions of the pump outlet can be positioned at an interval of 45° According to different requirements, so eight different angles can be applied by rotation in installation.
ZJD-series are suitable for severe slurry conditions with coarse particles and high competency:
2.1 Two types of material for wet parts (volute liners, front and back liners, impellers):
L high-chrome alloy
L highly wear-resistant rubber
2.2 Structure of shaft seals:
L Packing gland seals
L Pressure-reducing metal/ rubber gland seals
L Mechanical seals
3. Range of applications of a slurry pump
Slurry pumps are used widely throughout the beneficiation section of the mining industry where most plants utilise wet separation systems. These systems usually require the movement of large volumes of slurry throughout the process.
Slurry pumps are also widely used for the disposal of ash from thermal power plants. Other areas where slurry pumps are used include the manufacture of fertilisers, land reclamation, mining by dredges, and long distance transportation of coal and minerals.
Mining & Minerals
· Grinding and screening
· Hydrocyclone separation
· Magnetic separation
· Flotation
· Thickening
· Filtration
· Leaching, solvent extraction and electrowinning
· Pelletising
· Tailings
Metallurgy
· Roasting
· Annealing and pickling
· Coke quenching
· Hot strip milling
· Neutralisation
· Mud handling and waste treatment
| Type |
Allowable Mating Max. Power(Kw) |
Clear Water Performance |
Impeller |
| Capacity/Q m³/hr |
Head/m |
Speed/rpm |
Max Efficiency/% |
NPSH/m |
Nos of Vane |
Impeller Diameter/mm |
| 20ZJD-A |
7.5 |
2.34-10.8 |
6--37 |
1400--3000 |
30 |
|
4 |
152.4 |
| 50ZJD-B |
15 |
16.2--76 |
9--44 |
1400--2800 |
55 |
3.5--8 |
5 |
190 |
| 75ZJD-C |
30 |
18-151 |
4--45 |
900--2400 |
57 |
3--6 |
4 |
229 |
| 100ZJD-D |
60 |
50-252 |
7-46 |
800--1800 |
60 |
2--3.5 |
4 |
305 |
| 150ZJD-E |
120 |
115--486 |
12-51.5 |
800--1500 |
65 |
2--6 |
4 |
381 |
| 200ZJD-E |
120 |
234--910 |
9.5--40 |
600--1100 |
64 |
3-6 |
4 |
457 |
| 250ZJD-F |
120 |
396--1425 |
8--30 |
500--800 |
77 |
2--10 |
5 |
550 |
| 300ZJD-S |
560 |
468--2538 |
8--60 |
400--950 |
79 |
2-10 |
5 |
653 |
| 350ZJD-S |
560 |
650--2800 |
10--59 |
400--840 |
81 |
3--10 |
5 |
736 |
| 400ZJD-ST |
560 |
720--3312 |
7--51 |
300--700 |
80 |
2--10 |
5 |
825 |
| 450ZJD-ST |
560 |
1008--4356 |
9--48 |
300--600 |
80 |
2--9 |
5 |
933 |
| 550ZJD-TU |
1200 |
1980-7920 |
10-50 |
250-475 |
86 |
4-10 |
5 |
1213 |
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