LM Vertical Roller Mill

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Summary:

LM Series Vertical Roller Mill has combined the advanced Loesche technology introduced in German, MPS technique with innovative upgrading of our R&D team. For its low cost in operating, high quality of finished product, easy operation and easy maintenance,
energy saving and environmental protection, LM series vertical mill is widely used in metallurgy, electric power, cement ash, flue gas desulphurization and waste utilization, and it also has predominance in the fields of non-metallic minerals, coal and slag.

Features:

vertical mill 3 vertical mill 2 vertical mill 1

1. Low cost for investment: Integrating grinding, drying, grading and delivering. Simple structure, compact layout and open layout can significantly reduce the
costs.

2. Advanced transmission system brings high bearing capacity: New structure of gear reducer makes the machine a greater carrying capacity.

3. Hydraulic device makes maintenance more convenient: the most advanced hydraulic control system changes pressure automatically according to the materials, keeping it in the best condition, which reduces energy consumption and prolong the lifespan of roller sleeve and liner.

4. Reliable thin oil lubrication: the most advanced independent lubrication station, automatic protection system makes it safe and reliable in operation.

5. Applicable and multiple classifiers: Frequency control of separator is according to the different kind of materials and fineness. Particle size is in uniformity and easier for adjustment.

6. Electronic control system is of high automation: equipped with advanced electronic control system enable PLC, DCS and centralized control and meet multiple needs.

7. Energy saving and sustainable: less noise when working; after dust emission of the finished products, the dust density is much lower than the government standard on environmental protection.

Internal Structure:

Internal Structure

Working Principle:

vertical mill application

Full set of vertical mill consists of: main unit, bucket elevator, adjustable hopper, sealed constant feeder, air heating furnace, dust remover, blower and silencer. The motor drives the grinding table to rotate by reducer, and the hot air goes into the inner part of machine at the same time. The materials fall down to the center of grinding table from feed opening. Driven by the centrifugal force, materials move evenly to the edge of the grinding table, and they are grinded by the rollers when going through the rollers’ track. Bulk materials are crushed, while fine materials form material bed after
being squeezed and experience intergranular crushing. Grinded materials move on to edge of the grinding table until being taken away by strong airflow at the wind ring, in which larger materials fall to the grinding table by gravity and reground. The others enter the separator being graded. Under the influence of separator blades, materials that do not meet fineness requirements return to the grinding table to be grinded, while the standard ones go into dust collector through the pipes and are discharged as finished products from the discharge device. Irons and other impurities, which cannot be lifted by the wind for weight, move together with materials to the edge of grinding table and fall to the lower cavity, and then they are scraped into the slag discharge opening by stripper plate which is fixed at the bottom of the grinding plate and discharged out of the machine.

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（Ⅰ）LM Slag Vertical Mill

1.Brief Introduction of LM Slag Vertical Mill System

LM slag vertical grinding mill is the environmental friendly vertical mill. After years of accumulations, we, in cooperation with senior experts and institutes in manufacturing vertical mill at home and abroad, developed this environmental friendly and energy-saving vertical mill. At present, the capacity of this mill has completely reached an annual output of 0.3, 0.45, 0.6, 0.9 and 1 million tons. This machine is reasonable in overall structure, advance in technology and the operation is stable. Its most technical and economic indicators have reached the international advanced level. Blast furnace slag (slag) is an industrial slag,during iron smelting, excluded from blast furnace. Due to its high physical and chemical activition and potential hydraulicity, slag is widely used as admixture in cement industry. As commonly used slag grinding equipment, slag vertical mill mainly consists of refiner disc, roller, separator, pressing device, monitoring device, gearing device, sprinkler system and coarse powder recycling outside system, etc. These parts finish slag grinding together. Vertical slag mill has integrated drying, grinding, separating, delivering into one. Therefore, it has so many advantages such as, high grinding efficiency, big drying capacity, flexible control on product fineness, low noise, low power consumption, simple process, less frication and saving operating cost, etc, which makes it very suitable for large-scale grinding. Its main technical, economic indicators all reached the international advanced level.

2. Advantages of LM Slag Vertical Mill System

2.1 High efficiency: using rollers grind materials on the grinding disc directly consuming less energy. Compared with ball mill, it saves energy consumption by 30%~40%.As the hot air inside contacts directly with the material, drying ability is higher, and it saves energy. By regulating the air temperature, it can meet requirements with different humidity. 2.2 Less wear and tear: As the roller is not in direct contact with the disc, and material of the roller and liner is of high quality, so life lime is long and wear is less. 2.3 Stable Yield and High Quality. As materials stay in the mill for a short time, it is easy to detect and control the product’s particle size and chemical composition, which reduces repeated milling and stabilizes product quality. Moreover, roller shell and lining board don’t contact directly, so few iron are invelved into the product and these iron can be easily removed. Thus, to grind white or transparent materials, vertical mill produce product with high whiteness and purity. It is equipped with one limiting device, which prevents the roller from contacting with the liner directly, to avoid the destructive impact and severe vibration.

3. Technical Data

Model	LM1100	LM1300	LM1500	LM1700	LM1900	LM2200
Capacity(t/h)	5~9	7~11	9~13	11~15	14~20	22~26
Raw Material Moisture	<12%
Specific Surface Area	>=420㎡/kg
Product Moisture	<=1%
Main Unit Power (kw)	132	160	250	400	630	900

LM Cement Vertical Mill

1.Brief Introduction of LM Cement Vertical Mill

Cement vertical mill, mainly used to process cement clinker, sets cement grinding, drying and classifying into one. Its biggest advantage is low power consumption: 24 ~ 27kwh / t. The cement vertical mill from Shanghai Shunky, compared with its traditional ball mill, can save electricity 30% per ton. Meanwhile, it’s an all-in-one machine, needs less auxiliary equipment, occupies a small footprint, has less dust pollution. It is the new generation of environmental friendly cement grinding equipment in line with national energy saving policy.

2. Technical Data

Model		LM1100	LM1300	LM1500	LM1700	LM1900	LM2200
Capacity(t/h)		8~25	10~40	13~50	18~70	23~85	36~135
Fineness	μm	170~33	170~33	170~33	170~33	170~33	170~33
Fineness	Mesh	80~425	80~425	80~425	80~425	80~425	80~425
Product Moisure		<=1%	<=1%	<=1%	<=1%	<=1%	<=1%
Feeding Size (mm)		<38	<38	<40	<42	<45	<50
Material Moisture Limited		<4%	<4%	<4%	<4%	<4%	<4%
Max. Moisture Limited With Drying		<15%	<15%	<15%	<15%	<15%	<15%
Inlet Temperature (℃)		<350	<350	<350	<350	<350	<350
Outlet Temperature (℃)		70~95	70~95	70~95	70~95	70~95	70~95
Main Unit Power (kw)		132	160	250	400	630	900