In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . For instance, stamp mills were used in Samarkand as early as 973. . sizes by screening or classification; concentration by taking advantage of physical .. Of the gravity separation processes, the spiral concentrators and circular jigs.
Oct 26, 2015 . Spiral classifier and hydrocyclone are both mineral processing classifiers. . because they are the most widely used classifiers in our mill plant, at present. . improvements to spiral classifier, for example，Yantai Xinhai mining.