Drum Drying - Fritz has several double-drum stainless steel roll dryers. Drum drying is ideally suited for high or low solids content, high molecular weight water-soluble polymers. The liquid feed stock is pumped from overhead between two parallel rolls which are filled with live steam. The drums, separated by a narrow gap, turn inward and a thin layer of polymer is formed on the heated rolls. As the drums rotate, the material dries and is removed by a knife. The dry product is collected and transferred to a rotary hammer mill, reduced to the required particle size and packaged. A delicate balance between feed rate, roll speed, steam pressure and roll gap is maintained to ensure consistent product that meets the customers specifications.