Raymond Mill

The Raymond mill, also called Raymond roller mill, combines grinding, classifying, and if necessary, drying, in one machine to produce precisely sized powders to meet exact production specifications. It is an efficient fine grinding machine for large-scale powder production.

Wide applications of Raymond mill

Raymond mill is widely used in chemical fertilizer, chemical product, and mineral industries to grind non-combustible and non-explosive non-metallic materials with Mohs hardness below 9.3 and humidity below 6%.

It is an excellent grinding machine for barite, calcite, calcium carbonate, potassium, feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, etc.

Raymond mill parts

Raymond mill is mainly composed of Roller, Ring, Shovel, Shovel base, Bearing, Roller bushing, Spring for roller, Roller hanger, Reducer, Main shaft, Bevel gear & pinion, Classifier, Blower, Locking nut, Roller assembly, Snail shell, Motor, Elevator, Chain, Vibrating feeder, Crusher, etc.

(Structure Raymond mill plant)

(Raymond mill inside structures)

Important parts and their functions

Auxiliary speed reducer It is mainly used to reduce the speed of the rotating motor.	Grinding roller and grinding ring The materials are ground between the rollers and the grinding ring. As the wearing parts of Raymond mills, they are all made of excellent wear-resistant materials to prolong the service life of the equipment.	Blower A blower can blow the powder towards the upper classifier for classifying.	Classifier The classifier is for classifying the ground powders. The speed of the classifier determines the fineness of the finished product.

Raymond mill plant working principle

1. Raw materials are crushed into specified particle size by a jaw crusher, lift to the hopper by a bucket elevator, and then sent into the grinding chamber by a feeding machine quantitatively.
2. Rotating shovels scoop up raw materials and project them between the rollers and the ring where the grinding takes place.
3. The pulverized powder is blown to the classifier by the blower airflow for classifying. The oversized particles fall into the grinding chamber for regrinding. Qualified powders flow into cyclone collector through the classifier and are collected as end products.
4. To ensure that the Raymond mill works under negative pressure, the increased airflow enters the pulse dust collector through the pipe and is discharged into the atmosphere after purification. The dust-free operation in the workshop is realized by the pulse collector.

Features of Raymond mill

1. Large output and high grinding efficiency

Outputs of 8 to 176 tons per shift (8 hours). The finished powder is uniform in fineness, and the passing rate is as high as 99%.

2. Ability to produce powders of different particle sizes

Different uses of powder require different particle sizes. Therefore, the fineness of the Raymond mill can be adjusted arbitrarily between 0.173mm and 0.044mm. The achievable upper particle size is 800 mesh.

3. Low energy consumption

The Raymond pendulum mill achieves high requirements for grain size distribution easily and extremely energy efficiently, even in case of the highest demands regarding the fineness to be achieved.

4. Extremely robust and durable design

Less vibration due to integral gearbox increasing the mass of the mill and special designed anti-vibration device. Vibration reduction avoids cracking or damage to the frame and return box from long-term vibration and fatigue.

The important parts are made of high-quality steel, and the wearing parts are made of excellent wear-resistant materials to improve wear resistance.

5. Environmental protection

The good sealing performance of the equipment and the full-pulse dust collector ensure that the dust removal rate can reach 99%.

6. Automatic control

The electrical system adopts centralized control, and the grinding workshop can basically achieve unmanned efforts.

Parameter

Parameter Model	Raymond mill62	High strength66	High strength76	High strength87	High strength92	High strength93	High strength97	Raymond mill4119	Raymond mill4525
Feeding size（mm）	<15	<15	<20	<25	<25	<25	<25	≤25	≤30
Size of finished product（mm）	0.173-0.033	0.173-0.033	0.173-0.033	0.173-0.033	0.173-0.033	0.173-0.033	0.173-0.033	0.173-0.044	0.173-0.044
Shift output of different material fineness(t)	0.6-9	1-20	1.5-25	2.8-33	3-36	3.5-40	4-52	8-78	16-176
Rotate speed of central shart（r/min）	274	190	170	161	148	140	130	105	82
Diameter of pulverizing ring（mm）	525	725	850	907.5	973	1006	1050	1400	1770
Diameter of pulverizing ring（mm）	150	210	250	270	300	300	310	410	450
Height of pulverizing roller（mm）	100	150	150	150	160	160	170	190	250
Main Motor(kw)	7.5	15	18.5	22	30	30	37	75	132
Fan Motor	4-5.5	4-11	4-15	4-18.5	4-22	2-22	4-37	4-75	4-132
Analyzer Motor	6-1.1	6-2.2	6-2.2	6-2.2	6-2.2	6-3	4A-5.5	4B-7.5	4A-18.5