Washing trommel

WASHING TROMMEL (probably from the popular Latin word "butarium", which means "drum" * EN: sizing trommel, washing drum; DE: Waschbutte, Waschbottich, Waschtrommel; FR: baquet à rincer; ES: tambor cribador; RU: бутара) is the trommel screen (barrel, zhelomeyka); the washing trommel is the most ancient device for the washing of the sands from the placer deposits of gold and cassiterite. The washing trommel was crafted of wood. Subsequently, the washing trommel has obtained the shape of the rotating cylindrical or conical drum. The washing trommel comprises the loading funnel, the inclined screen, and the washing block (gateway).

The washing trommel has got the greatest distribution during the start of the 19th century. The washing trommel was powered manually or by the waterwheel. The productivity of the so-named manual washing trommel is 0.8 cubic metres per hour (in case of the servicing by 1-3 workers), while the productivity of the so-named horse-powered washing trommel is up to 4 cubic metres per hour.