What is Raymond? Raymond also known as Raymond mill, the English name: Raymondmill. It is suitable for all kinds of ore preparation, coal preparation, milling machines, such as raw material powder processing ore, gypsum ore, coal and other materials. Raymond, Raymond mill, Raymond efficient, high pressure rotary roller mill. 1906 CVGrueber created in the southern suburbs of Berlin, Curt Von Grueber machinery manufacturing [1] plant, he obtained the use of patents in the United States produce the first station Maxecon mill, and for BEWAG in Berlin's MOABIT coal power plant equipment as milling, grinding energy may be up to 5T / H, a few years sold nearly 600 units, respectively applied to the grinding areas of different industries. BEWAG proposed construction year higher yield coal mill. After ECLoesche shares and director Curt Von Grueber machinery factory decided to buy raymond centrifugal US patent discloses a ring roller mill, industrial milling machine to produce the first generation of Raymond system. The structure was erected in the center of the machine with a belt holder with rotating spindle plum, plum rack hanging three or more rotation roller rotating shaft driven at a constant rotational speed roller swings out, and In the centrifugal force of driving under the pressure mounted on the cylinder wall of the grinding ring. When the material into the grinding area under plow-shaped guide roller blade material beneath the action is brought to the front area of ??the roller. Since Raymond coal mill roller mill grinding force (centrifugal force) is restricted grinding roll diameter and rotation speed of the mill at the time only available in soft, low ash content and grindability good coal quality materials, and Germany hard coal quality, ash content and high need for higher grinding force, Raymond coal mill grinding this structure is difficult to meet the requirements, so Raymond coal mill in Germany have not been universal. At that time, just for the United States Raymond coal mill grinding coal quality requirements, so Raymond coal mill was in the United States has been widely promoted and applied. Raymond mill in consumable wear inevitably Raymond mill at work, when you want to achieve the purpose of grinding, the material is extruded through mutual grinding roller and grinding ring so as to achieve the purpose flour, so Raymond mill in the case of wearing scuffed is inevitable. Therefore, the user when using the Raymond mill usually pay attention to maintenance of equipment maintenance, the timely replacement of damaged parts accessories. Raymond wearing parts are grinding rolls, grinding rings, roller assembly, Raymond would use hundreds of hours after changing roller. Many users are aware of this, but many mills appeared in the course of a problem can not be solved correctly. Raymond roller and disc lining material is generally high chrome cast iron or nickel-chromium alloy, calcite mill, and such material has frequent breakage, loss is very serious, especially the loss of discontinued more It can not be estimated. To analyze this, Raymond affect the hardness and fracture of materials, the impact of post-processing of raw materials accessories heat treatment and fracture of parts rub against each other and the fracture. According to the company annual production experience Raymond, for the above, make the following solutions. Raymond parts wear is our goal, we all know that the harder the more wear-resistant products, so to make a more wear-resistant grinding roller and grinding ring seems very simple, because you just try to improve its hardness that is can, so many foundry casting flaunt their chromium content reaches 30%, HRC hardness of 63-65, but in fact not the case. The higher the hardness, castings contained carbide (Cr7C3) requires more quantity, feldspar mill, the more diffuse distribution, the probability of micro voids and micro-cracks formed on the substrate, the greater and carbide interface, At the same time will be greater chance of rupture. And the harder the harder cutting items. So casting out both wearable and not easily broken product is not so easy. Raymond casting extrusion load stress and grinding martensite easy to crack, eutectic carbides along the grain boundary precipitation into a network, because it will promote the brittle crack propagation, residual austenite exists when When a good stop extending cracks. Industrial milling machine, Lei machinery (online consultation), milling machines provided by Zhengzhou Machinery Co., Ltd. Lei. Zhengzhou Lei Machinery Co., Ltd. (www.hnzljx.net) (www.hnzljx.net) adhere to the "people-oriented" business philosophy, with a professional staff, and strive to provide the best products and services to contribute to the community, and welcomes new and old customers throughout the visit, sincere cooperation for a better future. Lei Machinery - your trusted friends, company address: Xingyang Zheng Ying dense road intersection 500 meters west, Contact: Manager.