LM Series Vertical Grinding Mill

Brief Introduction

LM series vertical grinding mill is one advanced powder making mill through many years' research & experience and bringing in the latest mechanical techniques of Europe, adopting top technology domesic and abroad, and based on many years mill experiences. It is one complete plant which integrated with drying, milling, classifier, elevator. It is the high standard mill which can fully meets the requirement of clients in the high production of powder. In view of the different production application, our company developed the LM vertical ore grinding machine and LM vertical coal mill the two subfamily series products.

LM series vertical grinding mill is a high-efficiency equipment and widely applied in cement, electricity, metallurgy, chemical and non-metal industry. It can grind these materials into powder as requirement fineness.By being a component of closed production lines, it can produce various size products of better effect.

Main Structure

The main structure consists of classifier, roller, illstones, pressurization device, deceleration machine, motor, shell body, etc. Separator is one high efficiency and power saving classifier device. Roller is the main part to grind the material into powder. The millstone is fixed at the output shaft of the decelerator which is the space material grinded by rollers. The pressurization device which brings pressure for the rollers to grind the material.

Features and Benefits

Reliable Operation

Automatic control devices equipped, remot control can be realized, the operation is easy and simple.

By turning the rockers well as oil jack maintenance, the hard surfacing, roller and ring can be maintained within short time, and reduce the loss because of stop operation.

The equipment is sealed, the whole system working in negative pressure, there is no powder overflow, clean operation environment.

Small vibration, low noise.

High Capacity

The hot air contact with the material in the main unit, this can improve the capacity of drying, and save power.

The hot air can adjust the temperature of different material, and it can reach to the requirement of different humidity.

The grinding time of certain material in the main unit is short, this is easy to control and detect the produce size and chemical composition. And reduce the repeated grinding, the quality of mill is more stable.

The equipment has a device which prevents direct contact between the roller hard surfacing, this can avoid devastating impact and strenuous.

Low Cost

Because of the integration of crushing, drying, grinding and classification, the system is simple, the layout is compact, comparing with ball mill, the building area can by reduced by 50%.

The roller can grind material on the millstones directly, the power consumption of grinding system is lower 40%~40% than ball mill.

The liner and roller made by special material, which can reduce the operation cost and prolong the life of roller and liner.

Open layout. Save investment costs.

Working Principle

During LM Series Vertical Grinding Mill is working,the grinding table is by the motor through decelerator, the material is feed to the center of the grinding table through the inlet by the air locking feeder, at the same time, hot air comes into the roller mill from the air inlet. Because of the centrifugal force, the material move to the edge of grinding table from the center. The material are crushed by the grinding roller when by pass of the groove on the grinding table. The crusher material continue to move to the edge of the grinding table until taken away by the airstream. Then the bigger material fall down the grinding table and the process of crushing continues. When the material the airstream pass the separator on the top of the mill, the material fall down the grinding table from the taper filler under the force of rotating roller, the fine powder gathered is the final product of roller mill. In the process of the contact of airstream, the moisture materials are dried to meet the clients' need at the proper moisture. Through the adjustment of separator, it can reach the proper fineness of the materials.

LM Series Vertical Grinding Mill Technical Data

Vertical Mineral Mill Model and Technical Date

Model		LM130K	LM150K	LM170K	LM190K	LM220K	LM240K
Rotate Median Diameter (mm)		1300	1500	1700	1900	2200	2400
Capacity ( t/h)		10~30	13~40	18~57	23~72	36~114	41~128
Product Size	mm	170~45	170~45	170~45	170~45	170~45	170~45
	mesh	80~325	80~325	80~325	80~325	80~325	80~325
Moisture		≤1%	≤1%	≤1%	≤1%	≤1%	≤1%
Max Feeding Size ( mm)		<38	<40	<42	<45	<50	<55
Moisture of Feeding Material		<4%	<4%	<4%	<4%	<4%	<4%
Moisture Should Be Dry		<15%	<15%	<15%	<15%	<15%	<15%
Temperature of Inlet (℃)		<350	<350	<350	<350	<350	<350
Temperature of Outlet (℃)		70~95	70~95	70~95	70~95	70~95	70~95
Power of Main Motor(kW)		185~220	250~280	355~400	450~500	710~800	800~900
Overall Dimension	Length(mm)	3500	4200	4700	8500	10200	11700
	Width(mm)	3400	3900	4500	5600	6700	7700
	Height (mm)	5800	7100	8300	8800	10600	12200
Weight (t)		48	75	90	100	125	160

Vertical Coal Mill Model and Technical Date

Model		LM130M	LM150M	LM170M	LM190M	LM220M	LM240M
Rotate Median Diameter (mm)		1300	1500	1700	1900	2200	2400
Capacity ( t/h)		10~15	16~22	20~28	26~35	35~45	40~50
Product Size ( R0.08)		<15%	<15%	<15%	<15%	<15%	<15%
Moisture		<1%	<1%	<1%	<1%	<1%	<1%
Max Feeding Size (mm)		<38	<40	<42	<45	<50	<55
Moisture of Feeding Material		<15%	<15%	<15%	<15%	<15%	<15%
Temperature of Inlet (℃)		<350	<350	<350	<350	<350	<350
Temperature of Outlet (℃)		75~95	75~95	75~95	75~95	75~95	75~95
Hardgrove Grindability Index (HGI)		>55	>55	>55	>55	>55	>55
Power of Main Motor ( kW)		185	250	315	400	500	560
Overall Dimension	Length (mm)	3500	4200	4700	8500	10200	11700
	Width(mm)	3400	3900	4500	5600	6700	7700
	Height(mm)	5800	7100	8300	8800	10600	12200
Weight ( t)		46	75	94	100	122	157