DEWATERING SCREEN

GRAU DEWATERING SCREENS

GRAU GDS Series Dewatering Screens have been designed to remove excess water from sand, gravel, and other fine aggregates after washing. They deliver a drier, cleaner end product with reduced moisture content, improving material handling and speeding up stockpiling or loadout. Commonly used in sand plants, recycling yards, and quarrying operations, they help increase productivity and reduce drying time and associated costs. Paired with suitable slurry pumps and cyclones GRAU Dewatering Screens can be used in compact sand plants.

WHAT IS A DEWATERING SCREEN?

A dewatering screen is a type of vibrating screen used to separate water from solid materials. It is typically installed at the end of a washing process to remove surface water from the final product. The result is a material with a low moisture content that can be handled, stockpiled, or transported immediately without the need for additional drying.

WHAT A DEWATERING SCREEN CONSISTS OF?

A standard dewatering screen includes a sloped deck fitted with high-tension screening media, usually polyurethane or rubber. It uses twin vibratory motors mounted either directly on the screen frame or on a base structure. The motors create a linear motion that drives the wet material up the screen slope while water drains through the screen surface at the bottom. Side walls, support springs or rubber mounts, and adjustable discharge lips are part of the assembly.

HOW DO DEWATERING SCREENS WORK?

Dewatering screens use vibration to lift and move wet material up and over a screening surface. The high-frequency, low-amplitude vibration forces water out of the material and through the screen media. As the material travels up the incline, capillary action and gravity continue to draw out water, leaving behind a drier product. The result is a consistent, manageable material with moisture levels as low as 8–15%, depending on the feed.

WHAT ARE THE MAIN APPLICATIONS AREAS FOR DEWATERING SCREENS?

GRAU dewatering screens offer versatile solutions across numerous industries:

• Sand and Gravel Processing – Removing excess water from washed sand and crushed fines before stockpiling or transport.

• Recycling Operations – Dewatering construction and demolition waste, recycled aggregates, and filter cake.

• Mining and Minerals – Used after washing or classification to dry coal, ores, and other fine mineral products.

• Concrete and Asphalt Plants – Producing drier material for consistent mix quality and easier handling.

• Industrial Sludge Treatment – Reducing moisture content in slurry and sludge for more efficient disposal or further processing.