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A closer look at Siltbuster's vibrating screens and hydrocyclones

What is your product?

Siltbuster has developed a range of compact and mobile vibrating screens and hydrocyclones, to complement its hire fleet of water treatment and materials recycling equipment. 

The range has been created because, in addition to the removal of silt and clay from water pumped out of excavations, the company is increasingly being asked to provide equipment that removes sand and gravel from a variety of construction and remediation sources.

What does it do and not do?

The range is perfect for the separation of the coarser sand and gravel sized particles for reuse.  However the hydrocylones and screens are not suitable for removing both coarse and fine silt and clay particles, Siltbuster’s lamella clarifiers are better for this.

How does it work?

Hydrocyclones operate by using water pressure to create a spinning, high shear environment, in which the coarse solids are flung to the outside of the unit by centrifugal action and are then discharged via an opening at the bottom of the conical outlet hopper.

The screens can be fitted with a variety of deck sizes from 0.3mm upwards, so they can be used not only for coarse aggregate recovery but also for sand dewatering. In addition by combining a hydrocyclone with one of the vibratory screens, the user has a compact unit that recovers and dewaters the sand too.

Where would it ideally be used?

The vibrating screens and hydrocyclones are aimed at the construction, materials processing and remediation industries – particularly in smaller, difficult to access sites. 

The range of hydrocyclones is primarily designed for the recovery of coarse to medium sized sand particles, but can also be used to recover a fine sand/coarse silt product suitable for reuse in low value applications such as pipe bedding. 

The compact vibratory screens vary in size from 0.6m wide x 0.9m long to 1.2 x 2.4m long, making them ideal for handling smaller quantities of aggregate.  

What benefits does it offer? 

A key benefit of the range is its mobility. Whilst many aggregate processing plants already use large, static hydrocyclone installations to separate sand from silt, the new Siltbuster units, are both compact and mobile, making them much better suited for use on construction sites.  

The vibrating screens and hydrocyclones make it easier and more affordable for sites to minimise waste and achieve their sustainability targets by allowing the cost effective recovery of sand and aggregates.  Depending on the deck sizes the screens can be used to recover between five and 20 tonnes per hour of coarse aggregate which translates into between 50 and 200 tonnes a day. 

For a company which otherwise needs to dispose of that aggregate, that’s a major saving/revenue generator.

Where has it been used?

We currently have several units installed with recycling companies in the UK and in Europe on a lorry mounted version of our Gritbuster plant.

How much does it cost?

A typical Siltbuster hydrocyclone and vibrating screen costs around £7,500-£10,000 depending on the model.

What are the savings?

Recovering 50 tonnes of coarse aggregate per day would save a company £4,000 per day in landfill tax alone.

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