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  • HLM Verticle Grinding Mill scene
  • Vertical mill yield
  •  Vertical Grinding Mill

HLM Vertical Roller Mill

Top equipment of blast furnace slag, composite dust and limestone large-scale processing. High Capacity, Advanced Technology, High Efficiency

Max feeding size: 50mm
Capacity: 5-700t/h
Fineness: 200-325 mesh (75-44μm)
HLM series vertical grinding mill is a kind of advanced pulverizing equipment integrated with drying, pulverizing, powder selecting and conveying. It is applied as a good solution to the technical issue such as low output, high energy consumption and high maintenance cost in the ordinary industry. HLM vertical mill has become the mainstream equipment in the pulverizing industry with the following advantages: efficient grinding, lower power consumption, larger feeding size, adjustable fineness, simple process flow, space-saving, lower noise, smaller air pollution, easy maintenance, lower operation cost, longer working life of wearing parts etc. HLM Vertical Mill is widely applied in power, metallurgical, cement, chemical and non-metal industry, such as cement raw material, blast furnace slag, composite dust, limestone, gangue, gypsum, bauxite, magnesium oxide, wollastonite, zircon sand, diabase, basalt, manganese, powder, coal, barite, calcite, etc.
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    • Introduction
    • Mill Structure
    • Main technical data
    • Performance advantages

     

    HLM Vertical Grinding Mill

     

     

    The working principle of HLM Vertical Roller mill

    The motor drives the reducer to rotate the millstone, the raw material are send into the center of the millstone from the air lock rotary feeder. Under the effect of centrifugal force, the material moves to the edge of the millstone. Material than be ground by the force of the roller and smashed under extrusion, grinding and cutting. At the same time, hot air is blew up around the millstone and bring up the ground material. The hot air will dry the floating material and blow the coarse material back to the millstone. The fine powder will be brought to the classifier, and then, the qualified fine powder will flow out the mill and be collected by dust collector, other coarse powder will be brought down to the millstone by the blade of classifier and be ground again. The circulation like this is the overall process of grinding.

    HLM Verticle Grinding Mill Structure

    Application Range

    With scientific & reasonable design and its unique advantages, HLM vertical roller mills are applied widely in power, metallurgical, cement, chemical and non-metallic industry, for grinding of various materials, such as cement raw material, clinker, limestone, slag, manganese, gypsum, coal, barite, calcite etc.. The grinding field is wide and grinding type is abundant.

    1. Humidity of grinding materials: from materials of 20-30% humidity(such as carbide, lignite, chalk, etc.) to materials of humidity less than 1% (such as cement clinker), wide range of materials.
    2. Grindability of materials: from high grindability(such as quartz sand, steel slag, mining slag, pyrophyllite, iron ore etc.) to low grindability (such as gypsum, calcite, etc).
    3. Fineness of grinding product: from 2-5mm(such as raw shale for making brich in new wall material industry, sand for construction industry, etc) Product fineness is easy to adjust and simple operation.

    grinding materials

    HLM Vertical Grinding Mill Structure

    HLM Series Vertical Mill consist of main mill, feeder, classifier, blower, pipe system, storage hopper, electronic control system and collecting system.

    HLM Verticle Grinding Mill Structure


    The Anatomy of HIL HLM Vertical Grinding Mill

    HLM vertical Mill uses standard modules to design and fabricate pressurization device. With the increase in mill capacity, there is an increase in roller numbers (we can use 2,3 or 4 rollers, 6 rollers maximum) in proper permutation and combination to form the series of equipment of various capacities with minimum standard parts in order to meet the requirements of different materials, fineness and outputs.

     The anatomy HLM Vertical Grinding Mill


    Polytechnic Procedure

    According to the layout of bag filter, there are two types of system solutions, i.e. three-fan systems, and two fan systems.

    Double-stage filter system
    ( Normally used in grinding of cement
    raw meal )

    A cyclone filter is used for collection of product. This arrangement can help to reduce negative working pressure and air volnme of system. Both EP and bag filter can be used as final prodnct collector.

     HLM Verticle Grinding Mill Double stage filter system

    Single-stage filter system 1
    ( Normally used in cement , metallurgical
    industry for grinding coal )

    Explosion-proof filter is adopted. Gas is sent into filter directly from mill. This system is with less equipments and simple Configuration.

     HLM Verticle Grinding Mill singel stage filter system

    Single-stage filter system 2
    ( Normally used for grinding cement
    clinker, mining slag, steel slag, non-
    metallic mineral, etc. )

    High-density EP or bag filter can be adopted. Gas is sent into filter directly from mill.
    This system is with less equipments and simple configuration.

     HLM Verticle Grinding Mill singel stage filter system 2

    Specification and technical parameter form of HLM Vertical Mill

    Model
    Modelo

    Grinding table median diameter (mm) 
    Diámetro del Plato de la molienda (mm)

    Capacity

    Capacidad

    (th)

    Mining Slag Moisture

    Humedad de la escoria

    Product specific surface area

    Superficie de area específica de escoria

    Product Moisture

    Humedad del Producto terminado

    (%)

    Power-

    (kw)

    HLM30/2S 2500 23-26 <15% ≥420m2/kg ≤1% 900
    HLM34/3S 2800 50-60 <15% ≥420m2/kg ≤1% 1800
    HLM42/4S 3400 70-83 <15% ≥420m2/kg ≤1% 2500
    HLM44/4S 3700 90-110 <15% ≥420m2/kg ≤1% 3350
    HLM50/4S 4200 110-140 <15% ≥420m2/kg ≤1% 3800
    HLM53/4S 4500 130-150 <15% ≥420m2/kg ≤1% 4500
    HLM56/4S 4800 150-180 <15% ≥420m2/kg ≤1% 5300
    HLM60/4S 5100 180-200 <15% ≥420m2/kg ≤1% 6150
    HLM65/6S 5600 200-220 <15% ≥420m2/kg ≤1% 6450/6700

     

    Note:Raw Materials bond index<=13kWh/t.

     

    Specification and Technical Parameter Sheet of HLM Pulverized Vertical Mill

    Modelo Model


    Grinding table median diameter (mm)

     

    Capacity

    (th)


    Raw Material Moisture

     

    Fineness

     

    Powder Moisture

    (%)

     

    Power

    (kw)

    HLM16/2M 1250 8-13 <15% R0.08=2-12 ≤1% 110/132
    HLM17/2M 1300 10-15 <15% R0.08=2-12 ≤1% 160/185
    HLM19/2M 1500 14-22 <15% R0.08=2-12 ≤1% 220/250
    HLM21/2M 1700 20-28 <15% R0.08=2-12 ≤1% 315/355
    HLM24/2M 1900 26-35 <15% R0.08=2-12 ≤1% 400/450
    HLM28/2M 2200 35-45 <15% R0.08=2-12 ≤1% 450/500
    HLM29/3M 2400 45-56 <15% R0.08=2-12 ≤1% 560/630
    HLM34/3M 2800 70-90 <15% R0.08=2-12 ≤1% 900/1120

    Remarks :Coal Fineness 3% when grinding anthracite ,the capacity will go down

     Specification and Technical Parameter Sheet of HLM Series Fine Roller Mill (Desnlfurization of Power Plants)

     Model


    Grinding table median diameter (mm)

     

    Capacity

    (th)


    Raw Material Moisture

     

    Raw Meal Fineness

     

    Power

    (kw)

    HLM16/2X 1250 6-9 <5%
    325meshs(44um)
    90%passed
    110/132
    HLM17/2X 1300 9-13 <5% 185/200
    HLM19/2X 1500 15-20 <5% 250/280
    HLM21/2X 1700 24-32 <5% 355/400
    HLM24/2X 1900 26-35 <5% 450/500
    HLM29/3X 2400 36-45 <5% 560/630
    HLM30/3X 2500 45-58 <5% 710/800
    HLM34/3X 2800 56-80 <5% 1120/1250

    Note:Raw Materials bond index<=13kWh/t。

    1. High efficiency

    (1) Low energy consumption, high efficiency, 40%-50% lower energy consumption than ball mill;

    (2) High single machine output, can use off-peak electricity;

    (3) Vertical mill technology is initiated by the country, it can improve the competitive strength of the enterprises in local area or even in the country;

    2. Easy maintenance, low operation cost

    (1) The rollers can be pull out from the mill by the hydraulic device, which is convenient for plate-replacement and bigger maintenance space;

    (2) Left and right side of the roller shell can both be used for prolonging the working life;

    (3) The mill can run without raw material on the grinding table, which erases the difficulty in starting;

    (4) The roller and grinding table are made from special material for longer working life;

    (5) High degree of automation: Applied Germany Siemens PLC series with automatic control system and can realized easy long-distance control and unmanned operation.

    3. Low investment cost

    The equipment features in a combination of crushing, drying, grinding, and conveying, simple process flow, reasonable and compact layout, space-saving (50% less than ball mill), lower foundation cost and workshop cost in the field;

    4. Stable powder quality

    (1) Material stay a short time in the mill, easy to control fineness and chemical component;

    (2) Regular powder shape, narrow fineness range, good fluidity, extensive application;

    5. Reliability

    (1) Rollers with height-controlled device, which could avoid strong vibration caused by the lack of material on the table;

    (2) Newly-designed roller sealing component ensures the reliable sealing without sealing the blower, which can lower the oxygen content in the mill to prevent the possibility of explosion;

    6. Environmentally friendly

    (1) Lower vibration and noise;

    (2) The whole facility is all sealed and operates under negative pressure, no powder overflow, no-dust workshop can be realized.

    (3)Vertical mill is the better equipment to lower power consumption in the mill industry, which is also what the country advocate and a must to increase the enterprise competitiveness in China powder industry.

    7. High Automatic Level

    (1) PLC automatic control system, remote control, easy operation and maintenance, lower labor cost.

    8. Strong Drying Ability

    (1) Vertical mill features in high trying ability with hot air direct contact with the material in the mill, maximal feeding moisture of 15% is workable. A separate drying machine and energy for the mill system can be both saved. The vertical mill can satisfy the materials in different humidity by adjusting the hot air temperature. 

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