HRS

In recent years, conventional roller screens have proved to be a sturdy and effective mechanism for the screening of fines from a crushing plant’s feed material.

With a roller screen, the separation surface is formed by polygonal discs, fitted in a staggered configuration to rotating rollers, which transport the material, circulating and loosening it. Separated fines drop through the gaps between individual rollers whilst the coarse material, assisted by the discs’ triangular shape, is conveyed via the roller screen to the overflow.

For difficult to screen, bulk material, including moist material with loamy or argillaceous shales, this type of screening appears to distinctly outclass oscillating screening machines, which frequently exhibit baking and adhesions with these materials. The rotary movement of the separation surface means that roller screens are ‘self-cleaning’ to a degree, and adhesions do not occur. In addition, each roll has scraper elements for guaranteed cleaning.

Furthermore, since a roller screen conveys the material horizontally, the downstream crusher is fed smoothly and consistently; reducing the workload for the crusher. This obviously results in reduced wear, reduced energy consumption and, in some instances a smaller crusher can be utilised. Consequently, employing roller screens generally leads to reduced energy usage, reduced operational costs, and increased operational safety.

The compact design, resulting from the horizontal material flow, as well as the variety of possible arrangement options, allows the application in numerous situations – underground as well as above ground. Plants of this type are suitable for a multitude of operations in limestone, clay, argil, coal, natural stone, salt, gypsum and other materials.

The HAZEMAG Roller Screen HRS is available as a single or multi-stage system, and with variable gap setting to meet all customer requirements.

Due to the modularisation of the roller screen length, almost any size of separation surface can be achieved