PRODUCT OVERVIEW

LM series vertical mill is a new type of milling equipment with advanced technology, excellent performance and drying function.It integrates the functions of drying, grinding and powder classifying,used in construction,coal,power plant,steel plant,construction,cement,ceramic and easy maintenance, power saving, fast investment return, electricity and other industries,and It has gradually become the mainstream equipment in the grinding industry.

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MAIN STRUCTURE

LM series vertical mill is mainly composed of classifier, roller device, grinding disk device, pressure device, speed reducer, electric motor and housing. Classifier is a kind of efficient and energy-saving powder concentrator. The roller is a component which is used for crushing the materials.Turntable is fixed on the output shaft of the speed reducer where the materials are crushed. Pressure device is a component which is used for providing the roller with enough crush pressure to crushing materials.

APPLICABLE SCOPE

Vertical mill is suitable for procseeing materials, such as calcium carbonate, kaolin, bentonite, talc, mica, attapulgite, barite, gypsum and graphite and so on.

Coal is a kind of inflammable and explosive mineral. An ordinary mill is unable to be used for production of the coal and therefore the grinding process of the vertical mill has gradually become mature.

Slag processing has become an important link in the industrial production along with the development of the industrial technology and its structure characteristics have determined the important position among the slag grinding industry.

Vertical mill has been playing an important role in the cement industry day by day with the development of scientific technology and it is not only applicable for grinding raw materials and clinkers but also can be used as a pre-grinding equipment which helps the sequent mill to substantially increase yield and save energy. Therefore it has gradually become the main products to substitute the cement industrial mills.

WORKING PRINCIPLE

The mill disk is driven by the gear box through electrical motor and the material will be fed to the center of the disk from the feeding port via an air-locking feeder and meanwhile the hot-blast air will be blown into the mill through the air inlet. Along with the rotation of the mill disk, the materials will move to the edge of the disk under the action of centrifugal force and grinded and crushed by a grinding roller when they pass through the circular groove on the disk. The crushed materials will be blown up by the high speed air at the edge of disk and the large-sized particles will fall onto the disk to be re-pulverized. The qualified fine particles will go out of mill along with the airflow and the finished products will be collected by a dust collecting device. The materials which contain moisture will be dried when they are contacting with the hot airflow. The product can meet the requirements of the materials in different humidity by regulating the hot-blast temperatures as to obtain the moisture and the fineness required by different products can be achieved by regulating the classifier.

PRODUCT ADVANTAGES

Low Operating Costs

The materials are rolled and crushed on the roller which helps to lower energy consumption and 30% to 40% energy will be saved comparing to the ball mill system.

As the roller does not directly contact the turntable directly and the roller and lining board is made of quality materials, therefore it enjoys longer service life and less wear.

The roller sleeve can be used by turning it over and its service life will be doubled.

Efficient Pulverizing

Pulverizing power will be increased through pressurizing the hydraulic pressure so as to increase the pulverizing yield and improving pulverizing efficiency.Meanwhile, it is also fitted with a limit device , only for the ground material,prevent only for grinding the material, prevent grinding roller and grinding ring accidental contact to cause equipment vibration and even wear.

High Precision of Powder
Concentration

Both cage-type powder concentrator (High efficient dynamic and static powder concentrator) and cone rotor powder concentrator (High efficient dynamic and powder concentrator) are adopted respectively according to the different requirements on the grain size of the finished products.

Powder Concentrator of Fine Mill

General Fine Powder Concentrator

Stable Quality

Strong Drying Ability

Featuring strong drying ability and a maximum feeding moisture of 15%, it can both save a dryer and energy for the mill system due to the hot air contacts the materials in the mill and it can meet different material humidity requirements through adjusting the hot air temperature.

Easy Maintenance

Losses arouse from the shut down of the machine will be reduced and the labor costs will also be saved through hauling oil cylinder, turning over the rotor arm, replacing the roller sleeve and lining board conveniently.

Environment-friendly

Featuring small vibration, low noise and overall sealing of the equipment, there is no overflow of the dust and it is clean and environment-friendly when the system is working under load which is able to meet the requirements of environment protection by the state.

SYSTEM TECHNOLOGICAL
PROCESS

Open-circuit System of Single Pulsed Jet Filter

The materials of this system is elevated to a required height by a bucket elevator and conveyed into and stacked in the intermediate bin after iron removing. Given a prior set feeding, the closed type constant feeder weights materials and feeds them into the vertical mill for pulverizing. The conforming products pulverized by the vertical mill is collected by a cage-type pulsed jet filter which helps to reduce number of equipment and simplify the system configuration. The products are conveyed into the finished product bin by screw feeder through a bucket elevator. This system is characterized by simple structure, very few equipment, less equipment investment, no drying heat source and low operating costs. It is applicable for relatively dry materials (Moisture < 4%) and the materials do not need to be dried in the system.

Closed-circuit System of Single Pulsed Jet Filter (Drying)

The difference between this system and the system of the single collector is that this system has heat source (Hot air generator), the products can be dried when being pulverized and it will save a dryer for the client who want to dry materials and partial tail gas carries heat can be cyclically utilized and a large number of costs on fuels can be saved.

TECHNICAL PARAMETER

Models		LM130K	LM150K	LM170K	LM190K	LM220K	LM280K
Plate diameter(mm)		1300	1500	1700	1900	2200	2800
Capacity(t/h)		10-28	13-38	18-48	23-68	36-105	50-170
Fineness of finished products	um	170-40	170-40	170-40	170-40	170-45	170-45
Fineness of finished products	Mesh	80-400	80-400	80-400	80-400	80-325	80-325
Max feed size(mm)		<38	<40	<42	<45	<50	<50
Main motor power(kw)		200	280	400	500	800	1250

Models	LM130N	LM150N	LM170N	LM190N	LM220N	LM280N	LM370N
OD of Turnplate(mm)	1700	1900	2100	2400	2800	3500	4500
Moisture of Scoria	<15%
Fineness of finished products	Specific Surface Area≥420m2/kg
Moisture of Powder	≤1%
Capacity(t/h)	4-6	6-8	8-10	10-12	20-26	50-60	90-110
Main motor power(kw)	200-250	280-315	400-450	500-560	900-1000	1800-2000	3150-3300

Models	LM80M	LM110M	LM130M	LM150M	LM170M	LM190M	LM220M	LM240M	LM280M
Plate diameter(mm)	800	1100	1300	1500	1700	1900	2200	2400	2800
Grinding Roller(pcs)	2	2	2	2	2	2	2	3	3
Capacity(t/h)	3-5	5-9	10-17	16-22	20-30	26-40	35-50	50-65	60-90
Pulverized coal fineness (R0.08)	5-20%	5-20%	5-20%	5-20%	5-20%	5-20%	5-20%	5-20%	5-20%
Max feed size(mm)	<30	<30	<38	<40	<42	<45	<50	<50	<50
Main motor power(kw)	55	110	185	250	315	400	500	710	900

Models	LM150Y	LM170Y	LM190Y	LM250Y	LM340Y
Plate diameter(mm)	1500	1700	1900	2500	3400
Grinding Roller(pcs)	2	2	2	3	3
Max feed size(mm)	20	20	20	20	20
Feed capacity(t)	15-25	25-40	35-50	80-120	200-250
Fineness of finished products 1 (R0.08mm)	≤5%	≤5%	≤5%	≤5%	≤5%
Output 1(t/h)	6-10	10-16	14-20	32-48	80-100
Fineness of finished products 2 (R0.2mm)	≤5%	≤5%	≤5%	≤5%	≤5%
Output 2(t/h)	9-15	15-24	21-30	48-72	120-150
Grinding circulation throughput (t/h)	60-100	100-160	140-200	320-480	800-1000
Main motor power(kw)	280	450	560	1400	2500

Models	LM130X-GX	LM150X-GX	LM170X-GX	LM190X-GX	LM220X-GX
Plate diameter(mm)	1300	1500	1700	1900	2200
Grinding Roller(pcs)	3	3	3	3	3
Max feed size(mm)	10	20	20	20	20
Fineness of finished products (D97)(Mesh)	325-600	325-600	325-600	325-600	325-600
Capacity(t/h)	4-12	6-14	6-14	13-26	15-30
Powder classifier(kw)	45	55	55	90	110
Main motor power(kw)	220	280	280	500	560

NOTE:The specifications above are for reference only; for more configurations, please consult our sales staff.

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PRODUCT OVERVIEW

MAIN STRUCTURE

APPLICABLE SCOPE

WORKING PRINCIPLE