The raccoon WB 518 is a drum screening machine based on the SM 518. It provides first-class services for wet grading and washing a wide variety of materials and removes even stubborn surface dirt.
The WB 518 raccoon wash is based on the SM 518 screening machine from Doppstadt and reliably removes buildup such as sludge, biofilm soil, etc. from a wide variety of materials such as biomass, stones, burl wood or plastic films. The items to be washed are fed into the feed hopper of the raccoon by means of a wheel loader, which transfers them in doses to the washing drum. There it is first brought into intensive contact with water, mixed and then dewatered.
The front part of the drum is closed to extend the interaction between material and water. Due to the drum rotation, the individual particles of the feed material rub against each other, which leads to the detachment of the surface contamination. In the rear area of the drum, the loaded washing water passes through the sieve openings of the washing drum and can be pumped into the external water treatment system using an optional pump. The clean coarse material is then discharged via the rear conveyor belt.
The WB 620 raccoon is based on the SM 620 screening machine from Doppstadt. In contrast to dry screening, problematic, sticky feed material can be separated very clearly using wet classification.
The raccoon WB 620 can be used stationary or mobile for different applications. Instead of a lower belt for the fine grain, it has a drip pan with an optional pump. A side discharge belt is also not required. Instead of the sieve drum, a washing drum is used, which is initially closed in order to mix the material intensively with the water. The second part of the drum then has sieve openings through which the water and surface contamination can drain. In this way, plastics, crushed stone or biomass can be processed for subsequent use.
Feed materials, such as moist mixtures of sand and gravel, can also be separated into a sand and a gravel fraction by wet classification. The sand fraction would then be discharged through the sieve opening with the water in a subsequent sedimentation step.