... .Gold and sand sifting, washing 3.Compost sifting Automatic Drum Rotary Sieve for Sand Washing and Grading machine 1. ... tumbles towards its eventual exit at the rear of the drum. 2. Features1) Configured for classification, screening, washing2) Large ... ) Construction of material: carbon steel, mild steel, stainless steel2) Trommel screen type: sealed type, open type3) Drum type: round, hexagon Detailed ...