SPIRAL CLASSIFIER / SCREW CLASSIFIER

DOVE Spiral Classifier, also referred to as Screw Classifier, or Spiral Mineral Separator, is highly efficient classifier designed for closed circuit wet classification and separation of the Slimes (Fines) from a sandy sized (Coarse) material. It is well suited for classification, where a two product size-split is required. Due to inherent operational qualities, DOVE Spiral Classifier is ideally suited for Sizing applications, Washing Applications, and Dewatering sand or crushed material from Hydro cyclone, or lower screen residues.

Spiral (Screw) Classifier at DOVE Factories

DOVE Spiral Classifier, DOVE factory.

FEATURES:

  • DOVE Spiral Classifiers are supplied in two main types of High Weir (H), and Submerged Spiral (S). The High Weir spiral component is partially projecting above water line and it is designed for classifying coarse feed application. The Submerged Spiral component is completely submerged bellow the water level, and it is designed for classifying fine sand feeds.
  • DOVE supplies both the High Weir (H) type, and the Submerged Spiral (S) type, with either single Spiral drive, or dual spiral drive classifier.
  • DOVE Screw Classifiers are supplied in various configuration, either with Single pitch, Double, or in some special applications with Triple pitch mechanism. The Screws are fixed with renewable wear resisting relics made of Ni-hard steel, or anti-abrasion rubber for durability, long life and low maintenance.
Screw Classifier at DOVE Factory with technicians

Spiral Classifier (Screw Classifier).

  • DOVE Spiral Classifiers are designed with special totally enclosed submerged bearing at the spiral real shaft end, providing efficient operation with low maintenance.
  • DOVE classifier is designed with special curved false bottom plate, to achieve absolute minimum clearance between the screw and the tub, therefore reduce slippage and maintain the highest tonnage capacity per unit.
  • Simple and rugged structure design, easy to operate, reliable and continuous operation and low maintenance costs.
Spiral Classifier at DOVE Factory

Spiral Classifier.

APPLICATIONS:

  • Heavy media separators for upgrading purpose, Dewatering, Desliming, Washing, and Classifying, in Iron Ore mining and Coal Beneficiation.
  • Closed Circuit grinding mills and classifying cyclone underflow in Gold ore, Tin ore, Tantalite ore, Copper ore, Wolframite ore, Molybdenum ore, etc.
  • Washing, desliming, dewatering of Silica sand, and Sand and Gravel operations.
Spiral classifier for hard rock processing plant

DOVE Spiral Classifier at the mining site.

CAPACITIES:

DOVE Coarse and Fine Spiral Classifiers are supplied in various capacities, tub lengths, screw sizes and technical specifications. We supply total of 15 models, where 10 models are configured with single screw and 5 models with dual screw.

TECHNICAL SPECIFICATIONS

MODEL SCREW DIAMETER TUB LENGTH SPIRAL ROTATION SPEED CAPACITY WATER REQUIREMENT MAXIMUM & MINIMUM PARTICLE SIZE POWER (MOTOR) WEIGHT
(mm) (mm) (rpm) (tph) (gpm) (mm/mesh) (kW) (ton)
SC-5045 500 4500 8.5-15.5 1.5-5 6 10mm/325 mesh 1.1 1.6
SC-5060 500 6000 24-38 15-30 112 10mm/325mesh 2.2 2.4
SC-6065 600 6500 21-32 22-50 132 10mm/325mesh 2.2 2.7
SC-7555 750 5500 5-8 3 11 10mm/325mesh 3 2.7
SC-1065 1000 6500 5-8 30-45 18 10mm/325mesh 5.5 4.5
SC-1265 1200 6500 5-8 50-80 26 10mm/325 mesh 5.5 8.7
SC-1584 1500 8400 4-6 85-120 37 10mm/325mesh 7.5 12.5
SC-2084 2000 8400 4-6 135-225 73 10mm/325mesh 11 20.5
SC-2492 2400 9210 3.6 230-320 92 10mm/325 mesh 15 25.6
SC-3012 3000 12500 3.2 350-500 147 10mm/325mesh 22 37.7
SC-1265-2 1200 6500 5-8 100-155 55 10mm/325mesh 5.5 x 2 14
SC-1584-2 1500 8400 4-6 160-230 73 10mm/325mesh 7.5 x 2 21
SC-2084-2 2000 8400 3-5.5 325-500 128 10mm/325mesh 11 x 2 36.5
SC-2492-2 2400 9210 3.6 520-570 183 10mm/325 mesh 15 x 2 46.8
SC-3012-2 3000 12500 2-3.2 600-900 275 10mm/325mesh 22 x 2 73

NOTE: Water Requirement may fluctuate depending on the type of material and sizing.

WARRANTY:

All DOVE equipment carry a standard Manufacturer’s Warranty, which can be extended to 5 years, in addition to lifetime spare parts supply service.

DOVE provides full technical services worldwide, including plant engineering design, mining site construction design, site assembly, installation, test run and training.

Mining equipment for Malaysia project 2019

MANUFACTURING FACILITIES:

DOVE Equipment & Machinery manufacturing facilities are located about 30 minutes drive from the company Head office in Bangkok, which includes 8 factories and showroom.

DOVE Equipment and Machinery with over 50 years manufacturing expertise, and the largest range of mining and minerals processing technologies is the recipient of ISO 9001: 2015, Green Industry Certification, and Golden Eagle of Asia Awards 2020 Best Business of the Year (DOVE Equipment and Machinery and DOVE Instruments), which insures highest quality and standard of our manufacturing and customer service practices.

DOVE Equipment Manufacturing facilities

DOVE Manufacturing Facilities.

DOVE Equipment and Machinery factories

DOVE Equipment and Machinery 8 Factories.

Video of DOVE Manufacturing Facilities:

MINERAL TEST SERVICES:

DOVE laboratory will assay your ore samples rapidly and analyze your raw materials and recommend the most efficient processing plant according to the ore specifications, minerals composition, and ore assay results, and your project size and the geologic and topographic conditions of your mine.

Please,  CONTACT US  for your sample analysis and quotation.

DOVE Minerals Assay Laboratory

OPERATING PRINCIPLES:

Spiral Screw classifier is a type of common mechanical classifier, consists primarily of an inclined tub and a transport screw for the coarse material. The fine material residue is at the lower end of the tub and the coarse material residue is at the upper end.

The principle of the operation and separation of solid grains is based on the law of gravity and concept that the solid particles are different in size and specific gravity, therefore the settling speed in the water is different. Fine ore particles float in the water and overflow, and respectively coarse ore particles settles to the bottom. As a guide line, a unit with longer length classifier will dewater the same material to a higher degree, and likewise a unit with a greater diameter of screw revolving the identical speed will produce higher capacity. In the application of dewatering fine material, the screw speed is reduced to allow proper classification and dewatering.

Spiral Classifier

DOVE Screw Classifier

WE HIGHLY RECOMMEND FORWARDING SOIL SAMPLES OF YOUR MINE TO US FOR ANALYSIS, IN ORDER TO DESIGN AND RECOMMEND THE MOST EFFICIENT PROCESSING PLANT, TAILOR MAID TO YOUR MINE REQUIREMENTS, FOR HIGHEST PRODUCTION RECOVERY.