Raymond Mill
Raymond Mill is mainly applied to the powder processing of mineral products in industries of metallurgy, construction, chemistry, and mining etc. It can produce powder from more than 280 kinds of non-flammable and non-explosive mineral materials with Mohs hardness below 7 and humidity below 6%, such as barite, limestone, quartz, calcite, granite, porcelain clay, basalt, gypsum etc. The final size is between 613micron and 440 micron(0.613mm—0.044mm).
Raymond Mill has almost several tens of years history, and the Shanghai Gulin Raymond mill has the same age with the first one all over the world.Currently, the most popular Raymond mill in the leading position are on the basis of Newell Company and occupies 70% market share. Raymond mill’s production and the development has closely related to the development of scrap industry.
Features and Benefits
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. The electric control system is centralized controlled, so the automaticity is high, no people are needed in the operating room.
5. Firstly, most raymond mills are used for handling with some frivolous material, but with the deepening of understanding and the superiority of the crushing steel, all kinds of raymond grinding mills are developed quickly and used wider and wider. Even to the entire scrapped cars and household appliances, processed with appropriate conveyor and sorting equipment, the composition of scrap broken lines can be easily finished ,so it is no need to dismantle of scrapped cars and household appliances and it is easily to product and process automatically to get pure crushed steel, non-ferrous metals and non-metallic materials available.
Working Principle
Firstly, raw material is crushed by jaw crusher to the size required, and 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 is 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 airflow system is closely sealed up and circulated under condition of negative and positive pressure.
The repair and maintenance of Raymond mill
1.During the application of the this grinding mill, some personnel shall be arranged to take responsibility of management. The operators must be qualified with the required technical knowledge. Before the installation of the grinding mill, the persons related to the operation should receive technical training and fully understand the operating principle, performance and regulations of it.
2.In order to guarantee the raymond mill in a normal working state, a Safety Operation System for the Maintenance of the equipment must be established. Only in this way can this grinding mill be guaranteed to have a long-term and safe operation. Meanwhile, it is necessary to have the required repairing tools, lubricant and grease, spare parts and accessories.
3.After some period of running, the raymond mill should receive an examination and repairing. The components vulnerable to worn out, such as grinding roller, grinding ring, relieving tool etc. should be repaired or replaced. Before and after the operation, a careful examination should be carried out for the connecting screws, bolts and nuts on the grinding rollers so as to find whether they are loose or sufficiently lubricated.
4.When their application time surpassing about 500 hours, all the rolling bearings in the roller sleeves must be cleaned, and the damaged parts should be replaced. The oiling tool can be either a manual oiling pump or grease gun.
Technical Data
| Type | Roller | Ring | Max.Feeding size(mm) | Fineness of product(mm) | power for Machine(kw) | |||
|---|---|---|---|---|---|---|---|---|
| NO | dimension (mm) |
height (mm) |
Inner Diameter (mm) |
HEIGHT (mm) |
||||
| 3R2115 | 3 | 210 | 150 | 630 | 150 | 15 | 0.44-0.165 | 15 |
| 3R2615 | 3 | 260 | 150 | 780 | 150 | 15-20 | 0.44-0.165 | 18.5 |
| 3R2715 | 3 | 270 | 140 | 830 | 140 | 15-20 | 0.44-0.165 | 22 |
| 3R3016 | 3 | 300 | 160 | 880 | 160 | 15-20 | 0.44-0.165 | 30 |
| 4R3216 | 4 | 320 | 160 | 970 | 160 | 20-25 | 0.44-0.165 | 37 |
Note: This specification is just for reference, any changes are subject to the Raymond Mill products.