LM Vertical Grinding Mill Introduce

LM vertical grinding mill sets medium crushing, drying, grinding, classifying and other functions as a whole, being the ideal equipment in the grinding industry.Already be proven commercially, LM vertical grinding mill presents a major advance in roller mills for finish grinding process. Comparing with other common roller mills, the compact LM series vertical grinding mill has the feature of space-saving design, reducing the civil construction costs,high-efficiency,energy-saving,which means a 50% reduction in per-unit power consumption over ball mills. The particle size adjustments of this vertical mil equipment are simple, with minimal noise and vibration.It also very environmentally friendly by protectint the working environment with measures to prevent particle escape.

LM Vertical Grinding Mill Working Principle

The motor drives the grinding table through decelerator. The materials fall down the center of grinding mill from feed opening. At the same time, hot air comes into the mill from the air inlet. Due to the centrifugal force, materials move to the edge of the grinding table. The materials are pulverized by the roller when by pass of the groove on the grinding table. The crushed materials are brought up by vane high-speed airstream, the larger particles fall down to the grinding table for regrinding. When the materials in the airstream pass the separator on the top of the mill , the coarse powder fall down the grinding table for regrinding under the function of rotation rotor. The fine powder comes out with the airstream , and is gathered by the dust catcher. The materials content with moisture will be dried when they meet the hot airstream. Through adjusting the temperature of the hot airstream, LM vertical grinding mill can meet different material's requirement, and also through adjusting separator , it can reach proper fineness of materials.

Technical data

LM Vertical Grinding Mill

Model		LM 130K	LM 150K	LM 170K	LM 190K	LM 220K	LM 130M	LM 150M	LM 170M	LM 190M	LM 220M	LM 130N	LM 150N	LM 170N	LM 190N	LM 220N
Wheel diameter(mm)		1300	1500	1700	1900	2200	1300	1500	1700	1900	2200	1300	1500	1700	1900	2200
Output (th)		10-30	13-40	18-57	23-72	36-110	10-15	16-22	20-28	26-35	35-50	5-14	7-20	8-27	9-30	18-55
Finish fineness	µm	170-45	170-45	170-45	170-45	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	80-325	80-325	80-325	80-325
Coal powder fineness (R0.08)							5-20%	5-20%	5-20%	5-20%	5-20%
Coal powder moisture (%)							<1%	<1%	<1%	<1%	<1%
End product moisture (%)		≤1%	≤1%	≤1%	≤1%	≤1%						≤1%	≤1%	≤1%	≤%	≤1%
Grinding material particle size D80 (mm)		<10	<10	<10	<10	<10	<10	<10	<10	<10	<10	<10	<10	<10	<10	<10
Grinding material max feed size(mm)		<38	<40	<42	<45	<50	<38	<40	<42	<45	<50	<38	<40	<42	<45	<50
Moisture of grinding material not to dry (%)		<4%	<4%	<4%	<4%	<4%						<4%	<4%	<4%	<4%	<4%
Matieral moisture of into mill (%)							<15%	<15%	<15%	<15%	<15%
Moisture of grinding material need to dry (%)		4%-15%	4%-15%	4%-15%	4%-15%	4%-15%						4%-15%	4%-15%	4%-15%	4%-15%	4%-15%
Into mill air temperature (℃)		<350	<350	<350	<350	<350	<350	<350	<350	<350	<350	<350	<350	<350	<350	<350
Out of the mill air temperature (℃)		70-95	70-95	70-95	70-95	70-95	75-95	75-95	75-95	75-95	75-95	70-95	70-95	70-95	70-95	70-95
Raw coal hardgrove grindability index (HGI)							>55	>55	>55	>55	>55
Main motor power (kw)		200	280	400	500	800	185	250	315	400	500	200	280	400	500	800
Contour dimension	Length (mm)	5520	6550	7170	7580	8080	5520	6550	7170	7580	8080	5520	6550	7170	7580	8080
	Width (mm)	2500	3070	3460	3320	4660	2500	3070	3460	3320	6700	2500	3070	3460	3320	4660
	Height (mm)	7060	7560	8300	8960	9020	7060	7560	8300	8960	9020	7060	7560	8300	8960	9020

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