Raymond grinder is one machine introduced from foreign countries. At present, there are many Raymond grinder manufacturers, and the machine is used for all ores and coal powders preparation, such as fine powder processing of raw material ore, gypsum ore and coal. In the powder grinding industry, the main development directions of the Raymond mill are reliability, precision, automatic supervision and control. Such measures as controllable silicon power supply, AC variable frequency speed regulating, grease centralized lubrication and vibration reduction can be taken and the devices such as supervision of working conditions and micro automatic control can be equipped.

Working Principle of Raymond Mill:

The grinder mill crushes and grinds the bulk raw material into the required feeding granularity, after that bucket elevator lifts the material into the storage bin, and then electric vibrating feeder transports it evenly into the grinding chamber where the material is scooped up by shovel blade and grinded between grinder roller and grinder ring, and then the blower blows the air into the grinding chamber from shunt plate and blows the grinded powder into the analysis chamber, the powder is concentrated by rotating analysis impeller that is driven by the speed motor with transmission gear, after the concentration, the large granular material drops back into the grinding chamber and is grinded again, and while the qualified fine powder enters into cyclone powder collector following the air flow. When the qualified powder separates with air, it is discharged into the final product from the discharging port. In the working process of the host machine, the shovel blade plays the important role. It is in the lower end of the grinder roller and they rotate at the same time when the material is scooped up and thrown into the space between grinder roller and grinder ring thus it shapes litter layer which grinds the material with the pressure force produced by rotating grinder roller so as to achieve the goal of making powder.

Structural Features of Grinder Mill:

1. It is the solid structure, covers small area; it is an independent producing system from primary material to the final powder.

2. Fineness of the final powder is well-distributed, 99% of them can pass through the screen, and other milling machines are hard to approach.

3. Raymond mill conmission equipment adopts closed gear case and pulley, stable convey and believable work.

4. Important part adopt high quality steel, abrasion proof adopt high quality abrasion material, the whole machine have a high abrasion and have a believable work.

5. Its electric system adopt concentrating control, the workshop can realize no-people work, and maintenance.

Type	6R4525	5R4119	4R3216	3R90	3R85	3R75	3R65	3R60
				4R90	4R85
Feeding size (mm)	<=30	<=25	<=25	<=25	<=20	<=20	<=15	<=15
Particle size of finished product(mm)	0.125-	0.125-	0.125-	0.125-	0.125-	0.125-	0.125-	0.125-
	0.044	0.044	0.044	0.044	0.044	0.044	0.044	0.044
shift output of different material fineness(t)	16-120	8-60	4-45	3-35	2-28	1.5-20	1-18	0.5-8
Rotate speed of central shaft (r/min)	82	105	130	160	160	160	180	280
Diameter of pulverizing ring (mm)	1770	1400	1073	973	885	865	725	495
Diameter of pulverzing roller(mm)	450	410	320	300	270	260	210	140
Height of pulverizing roller(mm)	250	190	160	160	150	150	150	100
Main Motor	y315m-	y280s-	y225s-	y225m-	y225m-	y225s-	y200L-	y160m-
	4-132	4-75	4-37	8-30	8-22	8-18.5	8-15	6-7.5
Fan Motor	y315m-	y250m-	y200L-	y180m-	y160L-	y160L-	y160m-	y132s-
	4-132	4-75	4-37	4-22	4-15	4-15	4-11	2-5.5
Analyzer motor	y160m-	yc200-	yc120-	y112m-	y112m-	y112m-	y112m-	y90L-
	4-11	4B-7.5	4a-5.5	6-2.2	6-2.2	6-202	6-2.2	6-1.1