Vertical Ore Milling Equipment Production Line Case

LM220N Vertical Ore Milling Equipment Production Line

1、LM220N Vertical Ore Milling Equipment Production Line

<1> Customer case

Saudi Arabia Aerated brick industry influential enterprises, has purchased two LM220N Vertical Ore Milling Equipment from our company.

<2>LM220N Vertical Ore Milling Equipment PRODUCTION

  • Day operation: 10 hours
  • Feed: Lime
  • Yield:18-55t/h
  • Finished: 80-325 mesh finished powder, for the production of aerated brick

<3> Feedback

Saudi customers:LM220N Vertical Ore Milling Equipment has high yield production of our first year to recover costs and achieve a net profit of 3 million. This year we have expanded the scale,purchased a LM220NVertical Ore Milling Equipment from SBM again. SBM service team assured us special offers installation visits and on-site technical guidance, we are very fortunate to find the right Vertical Ore Milling Equipment Manufacturer.

2、LUM1436 Vertical Ore Milling Equipment Production Line

<1> Customer case

Zhejiang, a superfine flour Ltd., the company responsible person engaged in the milling industry bentonite ten years, supply of finished products to more than 160 manufacturers,Purchase LUM1436 Vertical Ore Milling Equipment and related auxiliary equipment from my company.

<2> PRODUCTION

  • Day operation: 11 hours
  • Feed: feed size less than 10mm
  • Finished product: fineness of 400 to 650 mesh

<3> Feedback

Zhejiang customers:Select SBM LUM1436 Vertical Ore Milling Equipment reason is grinding roller sleeve and liner specially designed curve greatly improved uniformity of finished materials, the quality is through strict control. Long Separator principle, and each rotor frequency control are used, the grinding fineness can be realized within the selected range, you can do the second sorting, without the presence of low-grade material. The company decided to establish a long-term partnership with SBM, bentonite milling industry bigger and stronger.

Vertical Ore Milling Equipment Operating skills

1、Vertical Ore Milling Equipment Operating four core control

<1> Stable Material Bed

Maintaining the stability of the bed, which is the basis for Vertical Ore Milling Equipment grinding material bed, the key to normal operation. Material thickness by adjusting the height adjustment ring gauge, gauge rings vertical mill is a key component, its role is to maintain a certain level grinder material, wear ring gauge the impact of the stable operation of the mill. Correspondence between the right thickness, and between them and the mill output, Vertical Ore Milling Equipment operator during operation should grasp a clear picture in peacetime. Material layer is too thick to reduce the grinding efficiency, the material layer is too thin will cause vibration. Such as the roll increased, resulting powder is much thinner material layer; rolling reduction, disc material thicker, more appropriate to return the material, the material layer thickens. Mill wind speed increase, increase the internal circulation of material layer thickness, lower wind speeds, reducing the inner loop, the material layer thinning. Vertical Ore Milling Equipment Manufacturer summed up the view in continuous production practice: Vertical Ore Milling Equipment feed through the roller bed thickness after compaction control in 50 mm ~ 60 mm is appropriate.

<2> Control The Grinding Pressure

Polishing pressure is one of the main parameters controlling the fineness of the finished product. Since the weight of Vertical Ore Milling Equipment roller itself must, in production is mainly by changing the size of the grinding pressure of the hydraulic system, to meet the needs of grinding material. With the increase of the grinding pressure of Vertical Ore Milling Equipment, smaller particle size material, increase system throughput. But when it reaches a certain critical value continues to increase the grinding pressure, current main motor continues to increase, power consumption per unit of product increases, the vibration may increase Vertical Ore Milling Equipment. At the same time the roller, disc wear also increased, reducing its life; on the contrary, Vertical Ore Milling Equipment material layer thickens, the main motor current increases, Vertical Ore Milling Equipment pressure increases, increase the amount of powder back. Vertical Ore Milling Equipment Manufacturer time during debugging, when the volume of feed for 90 t / h, the grinding operation pressure is set to 6.5 MPa, with the time of day backstage production gradually adjusted to 140 t / h, the operating pressure will gradually be increased to 7.5 MPa, Vertical Ore Milling Equipment is in steady state, and the finished surface area can reach 450 to 480 m / kg control requirements.

<3> Ventilation control

Ventilation is guaranteed Vertical Ore Milling Equipment into the key out of the material balance. When the wind is too large, too much material on the disc is out, so Vertical Ore Milling Equipment is in the lower limit of the material layer, disc pressure decreases, the main motor current reduces vibration value increases. If the lack of wind, ground can not be taken out of the finished product, so that the disc pressure increases, the main motor current increases, Vertical Ore Milling Equipment material layer thickens, back powder increased significantly, Vertical Ore Milling Equipment is likely due to lack of necessary "cushion" to cause vibration, leading to stop grinding. In daily production, Vertical Ore Milling Equipment operator to determine the health of the fan and the valve according to the normal parameters, according to the amount of change in the wind turbine to determine whether the valve is in the flow state, and can work in a timely manner to get in touch with the job, so that they can keep abreast of production status Vertical Ore Milling Equipment, and ensure the stable operation of Vertical Ore Milling Equipment.

<4> A guarantee grinding temperature

Vertical Ore Milling Equipment is grinding and drying equipment, the gas temperature is a measure of dry grinding operations are normal comprehensive index. In order to ensure good drying of raw materials, the grinding material moisture is less than 1.0%, if the mill gas temperature is too low, insufficient explanation drying capacity, finished water big impact not only on the big bag filter, and may lead slag grinding is not fine , Vertical Ore Milling Equipment grinding efficiency decreases. When the mill gas temperature is too high, the material is dried quickly, but will make the roller, disc gear bearing temperature rise and shorten the life of Vertical Ore Milling Equipment. SBM LM, LUM Series Vertical Ore Milling Equipment exit gas temperature should be controlled between 95 ~ 105 ℃.

2、Vertical Ore Milling Equipment'S Operating Points

(1)Stable Material Thickness.

Stable material layer by controlling the amount of wind, import pressure, the volume of feed, water volume can be achieved. In theory, the material thickness of the roller diameter should be 2% ± 20mm. In addition, raw material thickness also depends on the particle size and particle size distribution, grindability and moisture content of raw materials and other factors. As in the height of dam certain conditions, feed the average particle size is too small or too fine, thin material layer; the average particle size is too large or too much bulk materials, then the material layer will thicken, Vertical Ore Milling Equipment load increases.

(2)Steady Grinding Pressure.

Vertical Ore Milling Equipment Manufacturer of grinding pressure with clear control, but considering the material into the mill size and particle size distribution, grindability impact and grinding rolls Dan disc wear degree, Vertical Ore Milling Equipment Manufacturer to determine their suitability to fumble through practice grinding pressure control value. In addition, to minimize the Vertical Ore Milling Equipment Operator of human factors, to avoid one-sided pursuit of high-yield and increase the grinding pressure, so as not to affect the safe operation of Vertical Ore Milling Equipment.

(3)Guarantee A Certain Temperature The Mill.

Vertical Ore Milling Equipment is drying and grinding system, the ground temperature is a measure of whether the job properly drying comprehensive index. In order to ensure good drying of raw materials, the grinding material moisture is less than 0.5%, the general control of Vertical Ore Milling Equipment outlet temperature at about 90 ℃. If the temperature is too low then the finished water, causing the grinding efficiency and reduce separator efficiency, condensation may cause dust collection system; if the temperature is too high, indicating that the flue gas cooling and humidification is not enough, the effect will affect the dust collector.

(4)Reasonable Control Of The Wind Speed.

Vertical Ore Milling Equipment is mainly driven by the flow of material circulation, reasonable wind speed can form a good internal circulation, so that the material layer on the disc proper, stable, high grinding efficiency. However, the amount is determined by wind speed, and wind, and then linked to the volume of feed, such as feeding a large amount of air flow should be large; otherwise reduced. Wind turbines affected system resistance can be adjusted by adjusting the blower valve. Vertical Ore Milling Equipment's drop into negative ground, the ground can reflect negative size of the wind. Drop big, big negative, said wind speed, air volume; on the contrary, the corresponding wind speed is small, a small amount of wind. Stability of these parameters on the stability of the air volume expressed, thus ensuring the stability of the bed of Vertical Ore Milling Equipment.

(5)Control Fineness

Fineness by the separator speed, air volume system, the mill load and other effects. In the wind and load unchanged, can be adjusted by changing the speed of fineness, each time adjusting to increase or decrease the amount is not too large, too large, the Vertical Ore Milling Equipment vibration increase even tripping.

Vertical Ore Milling Equipment Vibration Causes And Solutions

3、Vertical Ore Milling Equipment Vibration Causes And Solutions

(1)Material size

Into the grinding material size is a factor in causing the vibration Vertical Ore Milling Equipment, particle size is too large can lead to grinding roll downs overrun, vibration, jump stop. The solution is to strengthen the process management, frequently changes the hammer, to ensure the plant raw limestone particle size less than the maximum allowable size Vertical Ore Milling Equipment (80mm).

(2)Metallic Foreign Body

There are two sources of metallic foreign body, one does not remove the metal separator or ferromagnetic metal, the second is the mill off the metal. Metallic foreign body into the ground can cause vibration Vertical Ore Milling Equipment, bulk metallic foreign bodies cause abnormal vibration Vertical Ore Milling Equipment, small metallic foreign body resulting in Vertical Ore Milling Equipment intermittent slight vibration. The solution is to stop the Vertical Ore Milling Equipment, manual removal of metal into the mill. In addition, a process to strengthen the management and the mill itself weldment quality assurance metallic foreign body does not enter Vertical Ore Milling Equipment.

(3)Vertical Ore Milling Equipment Pressure

Gas pressure is the pressure loss in the Vertical Ore Milling Equipment is one of the main parameters Vertical Ore Milling Equipment process control. Pressure increases, the mill circulating load increases, Vertical Ore Milling Equipment unstable; the pressure decreases, the mill circulating load is reduced, Vertical Ore Milling Equipment Run is not stable. The solution is based on changes in the status of Vertical Ore Milling Equipment, timely adjustment of process parameters, strengthening process operation. Field strengthen management and eliminate variation due process or mechanical reasons caused Vertical Ore Milling Equipment dropout.

(4)Body Leakage

Leakage did not play a lot of material to carry the role, especially Vertical Ore Milling Equipment nozzle body above the ring leakage, damage swirling flow field inside the wind mill, the deterioration of the situation in the mill, airflow fluctuations disorders, leading to increased load Vertical Ore Milling Equipment, Vertical Ore Milling Equipment run unstable vibration increases. The solution is to strengthen the system plugging, plugging leakage treatment at Vertical Ore Milling Equipment body, each process piping valves, expansion joints, cyclone, etc., and regular inspection and maintenance, reducing air leakage coefficient, especially above the nozzle ring body Vertical Ore Milling Equipment the leakage particular attention.

(5)Vertical Ore Milling Equipment Temperature

Production practices and related studies have shown that as a result of prolonged duration Vertical Roller Mil electrostatic effects occur, the fine powder produce secondary aggregates, thereby reducing the grinding efficiency, the impact of Vertical Ore Milling Equipment production, resulting in unstable operation Vertical Ore Milling Equipment. There was a time, poor conditioning tower water, into the mill cold deformation damage can not open the valve, causing the ground air temperature is high, resulting in high Mil temperature Vertical Roller, Vertical Ore Milling Equipment Run unstable, low yield, vibration values gradually increased until the vibration enjoyed the stop. Remedy is to restore Vertical Roller Mil atomized spray, Vertical Roller Mil lower temperature, the outlet temperature control within the normal range, to ensure the stable operation of Vertical Ore Milling Equipment.

(6)Ring Gauge Height

Gauge ring grinder role is to maintain a certain material layers. Ring gauge high, material thickness; ring gauge is low, thin material. Initial production of the gauge ring height Vertical Ore Milling Equipment caused by lack of knowledge of vibration, the implementation of thick material layer operation, material thickness 100 ~ 120mm, height gauge ring 90mm. This will not only lower the grinding efficiency, low yields, and Vertical Ore Milling Equipment hinder the stable operation becomes more fragile, significantly affected by external factors, the production of Vertical Ore Milling Equipment frequent vibration, vibration mill class up to ten times the number of damage ancillary equipment. After analysis, because Vertical Ore Milling Equipment using thick material layer operation, the overall focus of the roller and the triangular frame high, increasing instability. Homeostasis running rollers and the triangular frame by poor ability to adapt to external factors, homeostasis easily damaged, causing vibration Vertical Ore Milling Equipment. Through the accumulation of experience, determine the height gauge ring is 50mm. Run in material thickness 60 ~ 0mm, equivalent to the roller and the triangular frame reduces the overall center of gravity height of 40mm, adds dynamic stability Vertical Ore Milling Equipment runs. Homeostasis running rollers and the triangular frame by external factors adaptability, and significantly reduce the number of vibration mill.

(7)Grinding pressure

The size of the grinding pressure can affect the yield and stable operation of Vertical Ore Milling Equipment. Pressure, abrasive strength, the main motor current, high grinding efficiency; little pressure, abrasive weak, the main motor current, low grinding efficiency. But the pressure is not too large, otherwise it will increase the main motor load, increased vibration. Initial production grinding pressure of 13.5 ± 1 MPa, Vertical Ore Milling Equipment unstable, the main motor current, vibration value of about 4 mm / s, is susceptible to fluctuations in incoming causal factors leading to sudden vibration. Solutions are based on material properties and run the actual situation, determine the grinding pressure of 10 ± 1 MPa. Vertical Ore Milling Equipment rated feeding amount, smooth running, vibration 2 mm / s, to good effect.

4、How to control the pressure Vertical Ore Milling Equipment

(1)Grinding pressure should range depending on the amount of materials and grindability set reasonable

Vertical Ore Milling Equipment grinding pressure to be set according to the material of the grindability and design yields. Abrasive material crushing pressure leads to less teenager, the outer loop increases, resulting in thickening of the material layer, the pressure increases, the impact of the mill ventilation, lower production, also affect the safe use of the scraper plate; grinding pressure is too general cause material layer too thin, resulting in broken without fine materials, increasing the circulating load and mill pressure, while increasing the main motor load, resulting in a waste of grinding power, is not conducive to a long and stable operation and energy saving goals.

(2)The timing and magnitude of the grinding pressure loading according to the amount of material depending on the mill

Determine how many of the most intuitive arguments quantity within the mill is grinding pressure, hydrostatic pressure loss Vertical Ore Milling Equipment at vents ring. Vertical Ore Milling Equipment when just getting the system to pull the wind to make reference to Vertical Ore Milling Equipment outlet pressure, pressure is not too large. After the material into the mill, the pressure is gradually increased to a certain extent, the falling pressure grinding rolls. Uniform layer to be expected, after the vibration stability, and gradually increase the grinding pressure. Vertical Ore Milling Equipment occur if the emergency stop phenomenon is due to the memory material grinding more pressure grinding rolls off in advance. This requires Vertical Roller Mil Operator summarized in the actual production experience, according to the pressure, the amount of the outer loop, the current into the grinding belt, the belt dermabrasion cameras accurately determine the ground conditions to determine the timing of a good pressure, the material layer premature instability, likely to cause vibration is large, the resulting late Vertical Roller Mil much material, pressure, easy to wear full, these are not conducive to mention the subsequent production operations. Load pump should be based on the magnitude of the minimum operating pressure differential may be, in other words, is to make the input pump action must be new pressure setting, the general magnitude of each load should not exceed 5bar (1bar = 1 × 105 Pa), to be stable hydraulic pressure feedback before deciding Vertical Roller Mil pressure increase or decrease according to whether re-compression or decompression, the final decision ultimately gradually grinding pressure based on the volume of feed.

(3)Grinding Pressure Uninstall

Uninstall grinding pressure often only stop grinding material at the beginning of the operation to be "fast but not urgent", decompression begins when only material, each minus 4 ~ 5bar, pending feedback stable after decompression, until minimize stress. Pressure relief valve has been too fast will result in an open state, is not conducive to stability of hydraulic station. And when only the material, due to the resurfacing materials go empty tape will take some time, taking into account the amount of internal and external circulation Vertical Ore Milling Equipment, usually within a period of time to minimize the grinding pressure is not cause vibration Vertical Ore Milling Equipment becomes large. When the internal pressure to be ground and the main motor current is reduced, you can stop grinding, then grind in the mill empty basic materials, open Vertical Ore Milling Equipment facilitate future.