They are widely used for screening quarry stone stock and classifying products in mining, sand, gold, energy and chemical industrial processes. The targeted substance is predominantly finer particles, which can then be directed into a separation unit, such as a hydrocyclone or are materials that can be removed and used. Removed materials are often formed intentionally and are classified by their shape, size and physical properties. For example, construction wastes are sorted and sieved by a circular vibrating screen into coarse and fine particles. The particles are taken to make concrete, architectural bricks and road base materials.