Commonly ores powder grinding mill has 3~6 rollers, but these kinds of grinding mills can only grind ores to medium fine powder (under 300meshes). 21 rollers micro powder grinding mill can finely grind ores to 300-3000meshes.
We have not only
21 rollers grinding mill, but 24-32 rollers grinding mill, 27 rollers grinding mill, 34-36 rollers grinding mill, and 40-44 rollers grinding mill.
21 rollers grinding mill is the new type mining equipment for making micro powders, fine powders, which is widely applied in the industries of metallurgy, mining, chemistry, cement, construction, refractory materials, ceramics, and so on.
Grinding materials of 21 rollers grinding mill includes various stones and rocks, such as: Kaolin, limestone, calcite, marbles, barites, gypsums, pyrophyllites, dolomites, calcium carbonates, pigments, clays, coals, carbon black, activated carbons, feldspar, talc, mica, carbon black, petroleum coke, alumina, chromic oxide, quartz, cements, up to more than 100 materials.
Details about 21 rollers grinding mill, please clirck:
http://www.clirik.com/GrindingMill/192.html