Raymond mill parts: grinding roller, grinding ring

Raymond mill parts includes grinding roller and grinding ring. And grinding roller and grinding ring are mainly made of the following two kinds of materials:

a) 65Mn

The durability of grinding roller and grinding ring made of 65Mn can be improved remarkably. 65Mn is characterized by high hardness, high wear resistance, and being magnetic. It’s mainly used in deironing-required powder processing industry. In addition to the major needs for iron. And its mechanical properties can be greatly improved after heat treatment, which makes it have high wear resistance and greatly improved toughness.

b) Mn13G2
Compared with 65Mn, the durability of grinding roller and grinding ring made of Mn13G2 is also improved. The water toughening treatment is conducted after casting pouring. Then, the casting becomes non-magnetic and has high tensile strength, toughness, plasticity, which makes the toothed plate more durable. When it is deformed due to severe impact and strong pressure during use, the surface hardening and the martensite takes shape to form a high wear-resistant surface layer. While with good inner toughness, even if worn to very thin, it can also withstand greater impact loads.

How to prolong the service life of Raymond mill?

Before the installation Raymond mill, the persons related to the operation should receive technical training and fully understand its operating principle, performance and regulations of. During the application of Raymond mill, some personnel shall be arranged to take responsibility of management from beginning to end.

To ensure the Raymond mill in a normal working condition, a Safety Operation System for the Maintenance of the equipment must be established. Meanwhile, it is necessary to have the required repairing tools, lubricant and grease, spare parts and accessories during the operation.

After some period of running, Raymond mill should be checked. The worn-and-torn parts, such as rollers, rings and shovels 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.

When their application time surpassing about 500 hours, all the rolling bearings in the roller sleeves of Raymond mill must be cleaned, and the damaged parts should be replaced. The oiling tool can be either a manual oiling pump or grease gun.

Division of industrial mill machine by output size

Indsutry mill can divided to following stages by output size:

1. coarse grinding: raw material size in the range of 40-1500mm,the finished product size is 5-50mm
2. medium grinding: raw material size in the range of 10-100mm,the finished product size is 5-10mm
3. fine grinding: raw material size in the range of 5-10mm,the finished product size is under 100μｍ
4. super fine grinding: raw material size in the range of 0.5-5mm, the finished product size is under 10-25μｍ

Under the above division, you can choose the proper type grinding mill for your business requirement. Henan Liming Heavy Industry produces many types grinding mill for process limestone,barite,marble,granite,kaolin,calcite,and other hardness ore, the main equipment are raymond mill, super pressure suspension grinder mill, super fine grindier mill, super pressure trapezium grinder mill,vertical mill,ball mill,etc.

Trapezium Grinder Mill: output size in the range of 1.6-0.045mm,the fineness can reach0.038mm

Vertical Grinder Mill: output size in the range of 0.045mm(325mesh),the fineness can reach 1250mesh.

Raymond Mill: output size in the range of 613-440μｍ(1.613mm-0.44mm),100-425mesh.

High pressure suspension grinder mill: finished product size can be adjusted in the range of 80-425mesh(fineness can reach1000mesh.

Super fine grinder mill: output size in the range of 5-45μｍ(325-3250mesh)

Note :Pleae keep in mind hardness,humidity,toughness of material will influence the production capacity and output size.

Three-rings and Medium-speed Micro-powder Grinder—The New Type Ultrafine Mill

HGM series Three-rings and Medium-speed Micro-powder Grinder is suitable to produce fine and ultrafine powder. It is mainly applicable to various kinds of non-inflammable and non-explosive brittle materials with Moh’s hardness less than 6 scale, such as the calcite, cretaceous, calcium carbonate, dolomite, kaolin, bentonite, talc, mica, magnesite, illite, pyrophyllites and vermiculite, sepiolite, attapulgite, pareto stone, diatomite, barites, gypsum, alum, graphite, fluorite, phosphate rock, kalium ore, float stone etc.

Henan Liming Heavy Industry Science & Technology Co., Ltd is the professional manufacturer of industrial grinding mills. The industrial grinding system is composed of vibrating feeder, jaw crusher of fine crushing, grinding mills (Raymond grinder, High pressure suspension mill, Super pressure trapezium mill, Three-rings and medium-speed micro-powder grinder), dedustor, fan, integrated electric control etc. In order to satisfy customers’ requirements for the processing of different rocks, fineness, capacity, application and different technological requirements, our company always follows the principle of adjusting measures to local conditions and optimizing investment environment, and aims at insuring that the investor can achieve the best economic benefits. As for the production project of industrial grinding mills, our company can send technical personnel to the customer site to conduct site investigation, planning and design technology. Our technical personnel are also responsible for the installation, commissioning and maintenance of late.

Three-rings and medium-speed micro-powder grinder is the ultrafine grinder which adopts Sweden advanced grinding technology. According to the development trend of domestic grinding industry and market demand, three-rings and medium-speed micro-powder grinder is the latest ultrafine powder grinding equipment which is specially suitable for clients to process superfine powder.

According to clients’ various requirements for raw material, final product size, capacity etc. The models of three-rings and medium-speed micro-powder grinder produced by Liming Heavy Industry include:

HGM60 three-rings and medium-speed micro-powder grinder,

HGM80 three-rings and medium-speed micro-powder grinder,

HGM100 three-rings and medium-speed micro-powder grinder.

What a bad day!

Yesterday was really a bad day for me! I did't sleep well at night because of serious stomachache. Unfortunately, I was on duty yesterday so I had to get up early. I felt dizzy and tired when I got up. When I took my temperature I found I had a fever nearly 39 degree. I went toa clinic to get some medicine, then I came to work by bus.


After I took some medicine, I felt a little better and began to post products on my micro-blog. I uploaded and shared our  products on Facebook, Twitter and Flickr. The machines are as follows: Jaw Crusher, Raymond Mill, CS series Cone Crusher, TGM series Trapezium Mill and Impact Crusher. Moreover, I also shared some common minerals which can be processed by Liming Heavy Industry Crushers and Grinder Mills.


I took a nap after lunch and felt much better In the afternoon.  I went on working untill 5:30 p.m. I went to bed very early last night and had a good rest.

http://www.mill-crusher.com/products/jaw_crusher.html
http://www.mill-crusher.com/products/raymond_mill.html
http://www.mill-crusher.com/products/symons_cone_crusher.html