vertical roller mill

vertical roller mill

Application: According to LM series vertical mill structure, which can be applied to cement, electricity, metallurgy, chemicals, ore and other industries of the material milling.

Applicable materials: cement, coal, feldspar, calcite, talc, fluorite, iron ore, copper, phosphate rock, graphite, quartz, slag and so on.

Feed grain size: 38-55mm

Production capacity: 10-50t / h

Raw material vertical roller mill

Raw material mill is our company to solve the production process of cement raw mill vertical roller mill output low energy consumption and high technology problems introduced the honor products. vertical roller mill is a mature technology, superior performance of the grinding and drying equipment, cement, coal, electricity and other departments are widely used in a set of drying, grinding, powder as one of the many advantages of integration, has become Cement grinding industry's mainstream products.

Raw mill vertical roller mill main separator, roller device, disc device, pressure device, reducer, motor, shell and other components. Separator is an efficient, energy-saving powder separator, roller is used to crush the material parts, the disc fixed to the reducer output shaft, the roller is rolling the material place, the pressure device is Grinding roller components to provide sufficient pressure to the roller to crush the material.

Technical advantages:

  • Raw material vertical roller mill low operating costs
  • (1) Low energy consumption: Grinding roller grinds material directly on the grinding disc with low energy consumption, which saves 30% ~ 40% energy consumption compared with ball milling system.

    (2) Less wear and tear: As the grinding roller is not in direct contact with the grinding disc at work, and the grinding roller and the lining plate are made of high quality materials, the utility model has the advantages of long service life and less wear and tear.

  • High efficiency milling
  • By way of hydraulic pressure booster can increase the size of the grinding force, which can increase production and improve milling efficiency; also has a stopper device, but to mill the material to prevent accidental contact with the grinding roller ring caused by equipment Vibration or even wear.

  • Easy maintenance
  • Just flip the rocker, change the sleeve, liner can be convenient and quick. While reducing downtime losses and saving labor costs.

Slag vertical roller mill

Slag mill is our company based on many years of vertical roller mill research and development production experience, for granulated blast furnace slag special products, through a multi-unit cooperation team of painstaking research, the mill thermodynamic system calculation, equipment selection calculation, the main parameters Calculation, the calculation of powder machine research and development and design of ultra-fine grinding equipment, which combines grinding, drying, grading in one, with grinding efficiency, drying ability and so on. Achieved a simplified process, small footprint, investment, significant reduction in power consumption, long life, high operating rate of ultra-fine grinding technology, and access to a number of national patents.

vertical roller mill

Structure principle

The raw slag of the slag vertical roller mill enters the feeding bin through the grabber. After the measurement, it is fed into the screw feeding device by the conveying belt and fed into the ZJTL roller vertical roller mill. When the material in the grinding wheel rotates with the grinding disc under the effect of centrifugal force, After the edge is moved, after compaction, degassing and grinding process, the material is blown from the hot air belt entering the edge of the grinding wheel and dried instantaneously. The finer particles are taken to the separator for sorting and the meal returns Grinding disc and then grinding. Qualified fine powder is brought into the bag filter, after the finished product gas powder separation. After the finished product is collected and transported into the finished product bulk warehouse, the exhaust gas is discharged after being silenced by the fan. Part of the hard-to-grind large particles of material (and iron tumor, iron slag) in the wind ring through the slag mouth into the external circulation system, after removing the iron again by the hoist into the grinding mill.

The hot air required for mill drying and ventilation is supplied by the hot blast stove and the deficit is partially replenished from the atmosphere by the cold blast valve. Large air drying capacity of the system, into the mill material moisture up to 8-15%.

Technical advantages

  • Roller running resistance, low energy consumption
  • Slag vertical roller mill, the inclination of the disc, roller mill in the process of pressurized grinding to rolling friction-based, and large-diameter disc rolling resistance is small, so the unit energy consumption is low. Composite roll cover, process and weldability, long life. The crank arm is loaded and the rocker arm which is responsible for the fixing and guiding of the grinding roller is located outside the vertical roller mill body.

  • Horizontal disc, the center of the material, uniform fabric
  • Slag vertical roller mill machine abrasive layer is only 20-30mm, particles easily crushed, it is low energy consumption and high efficiency. Ring nozzle around the disc was specially designed to reduce the ventilation resistance of the nozzle to prevent the nozzle blowing up the air flow on the roller and other components caused by wear and tear, for the vertical roller mill ore mill, annular nozzle bypass device can make the iron from No airflow through the row of dumping separated, and then excluded by the metal separator, vertical roller mill wear and tear to minimize internal parts.

  • Targeted design
  • According to different capacity requirements, the design of different specifications and the number of rolls, including the stability of the feed bed to enhance the auxiliary roller, 2 +2 (3 +3) form of roller design is more suitable for grinding slag.

  • Perfect loading system
  • Slag vertical roller mill liquid - gas combination of the spring loaded system buffer design, so that the whole vertical roller mill vertical roller mill parts without metal contact.

  • Energy-saving effect is more obvious
  • Due to the advanced concept of pulverizer, simple process and small installed capacity, pulverizing mill can save 45-60% electric energy compared with traditional tube mill system, while pulverized cement can save 35-40% Electricity.

Ultra-fine vertical roller mill

Ultrafine vertical roller mill is my company combined with many years of experience in the production of various mills to ultra-fine vertical roller mill-based, widely draw at home and abroad ultrafine grinding theory, design and development of advanced grinding equipment. Is a complete ultra-fine powder grinding, grading, conveying in one of the ultra-fine milling equipment industry professionals, can be widely used, chemical, metallurgical, non-metallic mineral and other industries. Mohs hardness of 5 or less, the density of 3.2 or less, the compressive strength of 150Mpa or less, non-flammable and explosive non-corrosive brittle material granular and powdered raw materials required grinding (325 ~ 2500 mesh ) Ultrafine powder. The following materials are generally suitable: calcium carbonate, calcite, barium sulfate, talc, wollastonite, pyrophyllite, dolomite, graphite, kaolin, limestone and so on.

Ultrafine vertical roller mill mainly by the motor, reducer, roller mill, disc device, pressure device, separator, body, petrol station, host PLC control system and other components. The main motor through the reducer drive disc rotation, while the wind from the inlet into the vertical roller mill body, the material by the feeder feeder mouth fell on the disc center, under the action of centrifugal force, the material from the disc center to the edge of the uniform movement, after Roller on the grinding roller area, by roller grinding, large pieces of material crushed directly, the formation of the material after crushing the material bed for crushing granulation. The crushed material continues to move to the edge of the disc until it is taken away by the strong airflow at the wind ring, and the larger granular material drops back onto the grinding disc and continues to crush. When the material in the airflow passes through the upper separator, Under the action of the blades, the coarse particles are returned to the grinding disc for grinding, and the qualified fine powders are discharged together with the airflow to be collected by the system's collector, and the collected powder is the product that the mill grinds out. Material mixed with iron and other debris with the material moving to the edge of the disc, due to its weight and can not be blown by the wind, fell to the mill under the cavity is installed at the bottom of the scraper Scraping scraper into the discharge port outside the machine . By adjusting the speed of the separator rotor, you can get qualified products of different fineness. By adjusting the pressure of the hydraulic system can be adjusted roll mill pressure, within a certain range of materials can be adapted to different hardness.

Technical advantages

  • Material layer grinding principle, the product of high brightness and clarity
  • Ultrafine vertical roller mill with vertical abrasive layer grinding principle, the material in the mill residence time is short, reducing repeated grinding. Few iron content in the product, used for grinding white or transparent materials, the product of high brightness and clarity. Abrasive curves of specially designed roll covers and linings make it easier to form an abrasive layer.

  • Roller lubrication alone, double pump oil
  • Roller lubrication using a separate lubrication station, and a single roller loop with dual pumps, pumping at the same time the mode of operation, even if the roller bearing lubrication and cooling sufficient, but also to ensure that the grinding roller bearing room will not save too much oil , Which led to the leak.

  • Germany Alpine powder technology, one-time to achieve the desired degree of fineness
  • Ultra-fine vertical roller mill using the German Alpine multi-head separator principle, each rotor can be frequency control, the finished product fineness in the selected range can be achieved, without having to go through the secondary air classification, without the next material The presence. Finished particle size of less than 2μm high particle content up to 70% up to 325 and low residue, also suitable for secondary separation of the finer particle size of the finished product.

  • Automatic control, frequency control, energy efficient
  • Using PLC / DCS automatic control roller pressure control, grinding pressure is precisely controlled, and does not require manual operation. Host PLC electronic control system for the host within the scope of the coordination of electrical components command work, the host speed using frequency control, compared with any other form of mill energy saving 30% to 50%, excellent economic benefits.

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