Ventoplex C

Overview

The Ventoplex C is a circuit-air classifier and the new C design has a separately driven classifying wheel, in contrast to the former Ventoplex B with central drive. The fan and classifying wheel are coaxially arranged and are driven by means of two separate hollow shafts, allowing the user to set different speeds and permitting a fineness range extension from currently 24 µm to 200 µm. The machine is fed to the centre of the classifier head via a hollow shaft; material falls onto a centrifugal plate that distributes the feed uniformly in the classifying chamber. Coarse particles fall against the upward flow of classifying air, collect in the coarse material cone and are discharged through the side via a gravity chute, while fine particles are entrained in the upward flow and enter the classifying wheel. Particles in the classifying wheel are separated by competing centrifugal force and flow (drag) force—coarse particles are rejected by centrifugal force and fine particles pass through by predominating drag force—and the Ventoplex requires no additional external dust collector to separate the fines. The Ventoplex C features stepless fineness adjustment during operation, low specific energy requirement, low peripheral speed, low air circulation rate, low overall height, low-wear design, good accessibility for inspection and maintenance, and a maintenance-friendly design using inexpensive wear parts; it is offered as model Ventoplex C390 KB. Because of its high wear resistance and high achievable fines throughput, the Ventoplex air classifier is described as ideal for use in the mineral powder industry, especially for ceramic powders that need to be produced without iron contamination. Explicitly listed materials include limestone, quick lime, fertilising lime, feed lime, bentonite, dolomite, gypsum, chamotte, quartz, feldspar, pegmatite, raw kaolin, ore, phosphor, glass powder, abrasives, rice flour and bone meal.