Roller mill principle and the factors affecting the production of Raymond mill
From : clirik Date : 2019-01-14 14:13
Raymond roller mill is a commonly used industrial milling equipment, commonly used in barite, calcite, potash feldspar, talc, marble, limestone, ceramics, glass, etc. The Mohs hardness is not more than seven grades, and the humidity is below 6%. Explosive mining and building materials, chemical, metallurgical and other industries more than 280 kinds of materials for the processing of powder. The mill size is adjusted in the range of 100 to 325 mesh.
Roller mill principle
The whole structure of roller mill is composed of main engine, fan, analysis machine and pipeline dust removal system. It can be equipped with crusher, hoist, storage bin, electromagnetic vibrating feeder and electric control cabinet according to user needs. After the material is crushed to the required particle size by the crusher, the material is sent to the storage bin by the hoist, and then the crushed material is uniformly and continuously sent into the host grinding chamber for grinding by the electromagnetic vibrating feeder.
Typical Raymond milling process
The principle of Raymond roller mill grinding is that the grinding roller is tightly pressed on the grinding ring under the action of centrifugal force, and the material is sent by the blade to the middle of the grinding roller and the grinding ring, and the material is broken into powder under the action of the rolling pressure, and then Under the action of the fan, the powdered material is blown up through the analysis machine, and the material that meets the fineness requirement passes through the analysis machine, can not reach the required heavy return grinding chamber and continues to be ground, and is separated and collected by the material of the analysis machine into the cyclone separator. The exhaust air is separated from the air by an industrial filter cloth.
Main factors affecting Raymond mill production
According to the working principle of Raymond mill and the actual production situation, the main factors affecting the production of Raymond mill mainly include the following six aspects:
1. Hardness of the material: The harder the material, the more difficult it is to grind and the more severe the wear on the equipment. Raymond's grinding speed is slow, of course, Raymond's grinding ability is small.
2. Humidity of material: When the moisture contained in the material is large, the material is easy to adhere in the Raymond mill, and it is easy to block during the feeding process, which reduces the grinding ability of Raymond.
3. Finished particle size: The fineness of the material after Raymond grinding, the fineness requirement is high, that is, the finer the material required by Raymond grinding, the smaller the Raymond grinding ability. If the customer has high requirements on the fineness of the material, other equipment can be added according to his own production capacity and economic strength. The mill has a wide particle size range and the finest particle size can reach 3500 mesh.
4. Composition of materials: The more fine powder contained in the material before Raymond grinding, the more it affects Raymond milling, because these fine powders tend to adhere to affect the transport. For the content of fine powder, it should be sieved once in advance. In this case, we recommend that the customer first screen the material with a vibrating screen before the milling process.
5. Viscosity of the material: the greater the viscosity of the material, the easier it is to adhere.
6. The better the wear resistance of Raymond milled parts (hammer head and jaw), the greater the Raymond grinding ability. If it is not wear-resistant, it will affect the Raymond grinding ability.
There are many factors affecting the production of Raymond mills, some of which are the methods used by customers. For these factors, we must constantly summarize and timely avoid them.
Of course, there are some technical factors of the equipment itself. For these customers, customers should be polished. Choose the right milling equipment.
How to choose a right Raymond roller mill?
The selection of Raymond milling equipment is mainly based on the factors affecting the properties of the materials handled by the milling manufacturer (including the structure, hardness, color of the mineral, the content of each grade of the desired product, the shape of the grain, etc.). In addition, it is necessary to proceed from the actual situation, to see the installed capacity of the whole machine, that is, the power consumption (energy consumption) and the required powder unit time production. For powders with special requirements, the user often applies the particle shape of the powder product. note. In addition, because non-metallic ore powder products are mostly white minerals, when selecting Raymond mill equipment, it should pay special attention to secondary pollution of products.
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