Dewatering and classifying

In the wet processing of construction raw materials and industrial minerals, Binder+Co impresses with a product diversity that ranges from the cleaning of heavily contaminated materials to dewatering and fine sand recovery.

Sand trap and double sand trap for cleaning and dewatering sand and gravel, sand recovery and refining sand and gravel.

Classification with precise separating cut.

dewatering SCREENS 
Screening machines for dewatering sand and gravel.

Scoop wheels for cleaning and dewatering sand and gravel.

Hydrocyclones and hydrocyclone compact plants for dewatering and classifying of sands.

SANDEXX Sand trap and double sand trap for efficient and energy-saving sand extraction

Advantages of sand drainage with SANDEXX

Sand production in a Binder+Co SANDEXX double sand trap is efficient and energy-saving. Efficient because cleaning and dewatering are carried out in one operation, utilising a large pool area and gravity sedimentation. In addition to the low operating costs, the double sand trap from Binder+Co convinces with exceptionally low maintenance costs. The SANDEXX sand trap reliably dewaters and cleans sand mixtures over a wide range (quantity and composition). An optional flap in the discharge chute of the fine sand wheel allows the fine sand product to be mixed with the coarse fraction as desired. A robust design and long service life characterise this machine.

This is how sand and gravel refinement works

After entering the wear-protected inlet impact chamber, the turbidity flow is calmed. Under the effect of gravity, the sand particles sediment and, at the overflow weirs, an energy-saving separation of the blowdown components from the sand product is achieved. A correspondingly large pool area promotes sedimentation and the extraction of fine sand.

Technical data SANDEXX / BDSF

Sand throughput (t/h)30 - 215
Water throughput rate for separation of slurry fractions160 - 340
Trough length (mm)9.100 - 11.100
Trough width (mm)2.700 - 4.200
Pool area (m2)21-40
Power coarse sand wheel 4-pole (kW)3-11
Power fine sand wheel 8-pole (kW)1,5-5,5

Machines for cleaning and dewatering sand and gravel: SANDEXX Scoop wheels

Scoop wheels for efficient and energy-saving sand extraction

Sand and gravel cleaning in the Binder+Co SANDEXX scoop wheel is efficient and energy-saving. Efficient because cleaning and dewatering take place in a single operation. In addition to the relatively low operating costs, the Binder+Co scoop wheel impresses with exceptionally low maintenance costs. The SANDEXX scoop wheel reliably dewaters and cleans sand and gravel mixes in a wide range (quantity and composition). A robust design and long service life characterise this machine.

The advantages of sand drainage with SANDEXX scoop wheel

The SANDEXX scoop wheel consists of a trough with a wear-protected inlet chamber and a wheel body fitted with buckets. On the side of the wheel body are the overflow weir units for separation and discharge of fine sand and slurry particles. Optionally the wheel body can be equipped with load-dependent speed control, which ensures optimal bucket filling and drainage of the product.

The areas of application of the Binder+Co scoop wheel

In addition to sand and gravel, the SANDEXX scoop wheel can also be charged with stones up to a grain size of 125 mm. Besides sand washing the SANDEXX scoop wheel is also suitable as a primary dewatering unit for coarse-grained, aqueous turbid after conveying by a suction dredger.

This is how gravel and sand processing works

The feed slurry passes through a wear-protected inlet impact chamber. The sand or gravel is scooped out of the trough through the buckets on the wheel body. These buckets are equipped with wear-resistant, replaceable, lateral and frontal scoop knives as well as conical PU slotted screen mats. Special drainage chambers in the wheel body and a larger gap width of the screen mats in the upper area ensure rapid drainage of the surface water.

Technical data SANDEXX / BSR

Feed grain size (mm)0 - 125
Throughput sand / gravel (t/h)30 - 370
Water throughput (m3/h)22 - 1.200
Trough length (mm) (in wheel body axis)2.600 - 6.300
Trough width (mm) (incl. inlet and outlet chutes)4.000 - 9.800
Pool area (m2)5 - 26
Power 4-pole (kW)2,2 - 15

Screw classifiers for precise separation of fines

Screw classifier for low-cost sand extraction

Screw classifiers or dewatering screws are used for simultaneous cleaning and dewatering of sand from upstream, brewed screening machines or for dewatering of cycloned sands. The deslurried coarse sand product is conveyed by the screw against gravity and discharged well dewatered at the upper end of the trough. The fine slurry overflowing at the lower end of the trough contains the majority of the water as well as the fines content of the sand.

How does the screw classifier work

The screw classifier separates the respective feed slurry into a dewatered coarse material and into a fine material slurry. It consists primarily of a flat inclined trough and a transport screw for the coarse material. coarse material. The fine material overflow is located at the lower end of the trough. end of the troughthe coarse material discharge at the upper end. The separation of the solid grains is based on the principles of the different final falling speeds of grains in water. Due to the turbidity level upwards above the turbidity level, the coarse coarse material is dewatered accordingly immediately before discharge.

Sand classification with hydrocyclones from Comec-Binder

The compact plant GCS from Comec-Binder for classifying and dewatering material

The GCS sand classifier from Comec-Binderis a compact and modular system for the efficient classification and desludging of sand. Precise separation cuts and a minimum of water ensure excellent quality in the end product.

Dewatering screens

Binder+Co Dewatering Screening Machines

The maintenance-friendly and low operating cost dewatering screening machine from Binder+Co works with proven dewatering screen mats with rising screen decks. Both the deck inclination and the oscillation parameters can be flexibly adjusted to the respective application or requirement, thus guaranteeing maximum efficiency and the best possible output quality.


The solids-water mixture is fed into a screening machine with linear oscillation. The linear movement of the rising screen deck transports the solids-water mixture over the dewatering screen mats. The screen overflow corresponds to the dewatered product, and the water partially enriched with fine solids is discharged into the screen underflow.

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