8/11/2019 NAWA Spiral Classifier
2/2
Dia x Length(mm)
Speed(rpm)
PoolArea(Sq.m)
Motor Output(kW)
STANDARD SPECIFICATIONS
(cu.m/min) capacity (tph)
Classifying size (mm) Spiral Pitch
0.3 0.15 0.075 Single Double Single Double
NSC600 600 x 5000 17.0 2.6 1.21 0.61 0.28 12.0 24.0 2.2 3.7
NSC900 900 x 6500 12.0 6.1 3.06 1.53 0.70 28.6 57.2 3.7 5.5
NSC1200 1200 x 8500 8.5 10.0 5.76 2.88 1.33 48.0 96.0 5.5
9.3
NSC1500 1500 x 9500 7.0 16.8 9.32 4.66 2.14 70.0 140.0 7.5
11.0
NSC1800 1800 x 10000 5.5 21.0 14.00 7.00 3.22 105.0 210.0 11 .0
18.5
NSC2100 2100 x 11000 5.0 25.0 20.00 10.00 4.60 152.0 304.0 15.0
22.0
Max. Over Flow Rake-upModel
Note: 1. Motor output indicated is based on 2.7 sp.gr. of feed
material with double spiral ribbon & tank inclination of 16
deg.2. Tank shall be of 'Sub Merged Type' for 100-325 mesh
separation & 'High-Wear Type' for separating 20-100 mesh. 3.
Indicated
tank lengths may be varied according to operating condition. 4.
Other sizes available on request. 5. Installation data on
request
CRUSHING-SCREENING-MATERIAL HANDLING-AGGREGATE PLANTS
NAWAHOUSE, Phone
91.40.2355 4071
91.40.2355 4072
Fax
91.40.2355 6706
Web
www.nawaengineers.com
Email
[email protected]
For more information, contact:
ENGINEERS & CONSULTANTS (P) LTD.
ISO 9001:2000 CERTIFIED COMPANY
House No. 8-2-334/3&4,
Road No.5, Banjara Hills,
Hyderabad - 500 034
Andhra Pradesh, INDIA
OPERATING DESCRIPTION
TECHNICAL FEATURES
The screw classifier is an ideal machine to separate water and
silt and other unwanted finesfrom sand and mineral ores. It
consists of a slow rotating and gently elevating spiral screw in
aspecially designed tub having an inclined trough.
Feed to the classifier, consisting of solids and water mixture,
comes from washing screen. Siltand unwanted micro-fines get floated
and discharged over weirs. The coarser particles settleat tub
bottom. The screw continuously rakes up the clean settled coarser
particles. As thematerial is raked up the inclined trough, excess
water is drained back into the tub. Thedewatered product is
discharged at the upper end of the trough on to a conveyor belt
that takesit to a storage.
The hydraulic classification barrier between micro-fines and
coarser solids can be set to arequired mesh, which can be
accomplished to a high degree of efficiency by varying theoverflow
velocity over adjustable weirs and turbulence by spiral shaft
speed.
NAWASPIRALS come in a wide range of sizes to cover varied
classification requirements andspecifications, and raking
capacities upto 300 TPH, for application in sand preparation
andmineral beneficiation plants.
Fabricated and reinforced tank construction with heavy gauge
steel
Adjustable weirs for classification control
Heavy duty and large diameter seamless tubular shaft designed
for minimum deflection
Submerged bearing assembly fitted with heavy duty dual roller
bearings in a specialhousing provided with multi layer labyrinth
and oil seal protection against ingress of foreignmaterial
Front end spherical & roller bearing combination assembly in
a special housing providedwith oil seals against dust
ingression
Ruggedly built spiral flights welded to spider arms and
protected by abrasion resistant wearliner segments fastened by
counter sunk head bolts; the whole assembly designed for adurable
and long life
Hoisting arrangement for lifting spiral assembly on the
submerged bearing side to preventclogging and for periodic
inspection
Simple drive train consisting of shaft mounted gear reducer
fitted on front end of spiralshaft, V-belts and electric motor
Entire drive and front end bearing assembly mounted on a pivoted
base such that the spiralassembly can be raised and lowered
Electronic frequency controller for step less speed variation of
spiral rotation, for setting theclassification mesh (optional).
A packaged free standing support frame of simple construction
and easy installation
SEPARATE SAND & MINERAL ORES FROM SLIT AND UNWANTED
FINES
