Load the stuff for grinding evenly and continuously into the grinding chamber of the main frame. Due to the centrifugal force in rotation, the roller swings outward and presses closely upon the ring. The shovel carries the stuff to the space between the roller and ring. When the roller rolls, the stuff is thus grinded.
After being grinded, the stuff is to be routed to the sorter along the wind belt of the blower and the rough powder will be put back to the grinder for regrinding. The fine powder flows into the product cyclone collector together with airflow and is expelled from the powder output pipe as product.
In the grinding chamber, since the stuff may contain moisture to some extent, the heat generated during grinding makes the moisture evaporated; since the pipeline joints are not airtight, the external air is sucked in and the circulation air mass increases. In order to enable the grinder to work under negative pressures, the increased airflow is guided to the deduster anew sequentially to the atmosphere after purification.
Raymond Mill
Structure of Raymond Mill:
1. The whole plant is a vertical structure of strong systematic characteristic, so it occupies small area. From crushing of raw material to grinding and packing is an independent production system.
2. Compared with other milling plants, its passing ratio achieves 99%, this is what other mill can not reach.
3. Driving system of main frame adopts airtight gearing and pulley, drives smoothly and operates reliably.
4. Main parts of the whole plant are made from cast and steel of high quality. The technics is so subtly that insures the durability of whole plant.
5. The electric control system is centralized controlled, so the automaticity is high, no people are needed in the operating room.
Working Principle:
Firstly, raw material is crushed by jaw crusher to the size required, then the crushed materials are elevated into a hopper from which the material is transported through the electro-magnetic vibrating feeder, evenly and continuously into the grinding chamber for powder-processing. The rollers oscillate outward to press the ring because of the centrifugal force and the shovel scoops up the materials, send to the middle between ring and roller to accomplish the grind.
After this, the ground stuff are carried by the air from the blower into the separator for screening. The fine powers are blow into the cyclone collector and are poured out through the output-powder valve as the final products and the rough stuff after the screening will be recycled back into the grinding chamber for regrinding. The set’s airflow system is closely sealed up and circulated under condition of negative and positive pressure.
| Model | 3R2115 | 3R2615 | 3R2715 | 3R3016 | 4R3216 | ||
| Roller | Number | 3 | 3 | 3 | 3 | 4 | |
| Diameter (mm) | 210 | 260 | 270 | 300 | 320 | ||
| Height (mm) | 150 | 150 | 150 | 160 | 160 | ||
| Ring | Inside diameter (mm) | 630 | 780 | 830 | 880 | 970 | |
| Height (mm) | 150 | 150 | 150 | 160 | 160 | ||
| Maximum feed size (mm) | 15 | 15-20 | 15-20 | 15-20 | 20-25 | ||
| Output size (mm) | 0.044-0.165 | 0.044-0.165 | 0.044-0.165 | 0.044-0.165 | 0.044-0.165 | ||
| Power of main frame (kW) | 15 | 18.5 | 22 | 30 | 37 | ||
| Fineness of final product (mm) | 0.165 | capacity (t/h) | 1.2-1.8 | 1.8-2.5 | 2.3-2.8 | 2.6-3.2 | 3.2-4.5 |
| 0.075 | 0.6-1.2 | 1.2-1.8 | 1.8-2.3 | 1.9-2.6 | 2.4-3.1 | ||
| 0.044 | 0.6-1.0 | 0.8-1.2 | 0.9-1.7 | 1-1.9 | 1.8-2.5 | ||