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Pulverizing Materials in the Extreme Fineness Range
 The Raymond® Vertical Mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range. The principle of integral air classification, originally developed by Raymond, has been applied with outstanding success to this mill. As a result, a large number of products can be reduced to 95% to 99% passing 15 to 20 microns while others with smaller crystalline structure can be ground as fine as 95% to 99% passing 5 to 10 microns.
The Raymond® Vertical Mill is well adapted to the grinding of non-metallic minerals and manufactured materials in the extreme fineness range. Typical materials processed include graphite, limestone, cocoa powder, marble, kaolin, sugar, talc, certain synthetic resins, organic and inorganic colors, phosphate, chemicals, glass, enamel, food products, pharmaceuticals and a variety of chemicals.
Raymond® Vertical Mill Advantages
» Uniform particle size
» Unit swings open easily for inspection, cleaning and maintenance
» Easy replacement of wearing parts
» Simple straightforward operation
» Compact design requires little floor space
» Available with integral flash drying or water-cooled grindingchamber
Raymond® 35" Vertical Mill Typical Performance
|
Material |
Fineness |
Rate |
| |
% Passing |
Size |
lb/h |
kg/h |
| Alumina Trihydrate |
90 |
10 micron |
1400 |
630 |
| Cocoa 18% butterfat |
99 |
200 mesh |
2400 |
1100 |
| Talc |
95 |
200 mesh |
3500 |
1600 |
| Sugar |
99.9 |
20 micron |
2500 |
1100 |
Principle of Operation
 The distinguishing feature of the vertical mill is the straightforward manner of operation with no need for close clearances or complicated adjustments. One vertical shaft carries all the rotating parts within the mill. On top is the fan that produces the required airflow. Below this are the two banks of whizzers that do the classifying, and below these are the hammers or accelerating elements.
Performance Features
| Mill Size |
18 |
35 |
| Capacity Factor |
1 |
1 |
| Power-hp |
20-25 |
150-200 |
Airflow - cfm
m3/h |
1000
1700 |
3500
5900 |
Arrangement 35" Raymond® Vertical Mill
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