Increase Vertical Roller Mill Production

Increase Vertical Roller Mill Production

Introduction

Vertical roller mill production is getting lower and lower. Look for these reasons, increase production and earn more money. Vertical grinding is a grinding equipment that integrates drying, grinding, powder selection and transportation. It is popular because of its small footprint. However, many people feedback that after the equipment was used for a period of time, the output was not as good as before, which directly affected the economic benefits. Let's take a look at the factors affecting the mill's production today and how to prevent it from decreasing.

Roller and disc liner wear

When the vertical roller mill is working, the grinding pressure is applied through the grinding roller, and the material is subjected to the force of pressing and shearing of the grinding roller and the grinding plate to achieve the purpose of grinding the material. Therefore, wear of the roller surface and the grinding plate surface liner is inevitable. With the prolongation of grinding time, the wear of the liner will be more serious, and the gap between the grinding roll and the grinding disk will become large or uneven in shape, and the grinding efficiency will be greatly reduced, resulting in a sharp drop in vertical roller mill output.

In this case, the wear of the lining plate should be inspected periodically. When the grinding roller and the lining plate wear to a certain degree, they must be replaced in time, so as to avoid the vibration or other problems caused by the wear of the lining plate and affect the vertical roller mill operation. The wear of the liner must be checked and dealt with in time. The service life of the liner can be extended by changing the surface of the liner and lowering the height of the retaining ring.

Increase Vertical Roller Mill Production Increase Vertical Roller Mill Production

Wear Ring

The function of the grinding material ring is to enable the material to be fully milled on the grinding disc. The material ring is subject to wear or a section, which will inevitably reduce the thickness of the material layer. The vibration of the mill will increase. The coarse powder will not be fully ground and the disc will be thrown off under the action of centrifugal force, increasing the amount of material returned to the mill. The amount has also increased, which can only reduce the vertical roller mill output, and the vibration is also large, it is also easy to jump and affect the operation of the mill. Therefore, check the retaining ring regularly to find out the problem and deal with it in time.

Spout ring wear

The main function of the spout ring is to change the direction of the wind through the guide vanes to ensure that the air flow is rotated upwards to take away the material. If the spout ring is worn or partially worn, the air flow becomes chaotic and a stable spiral upward air flow is not formed, and the wind speed is also reduced. The material can not be taken away in time and return to the grinding disc or scraper cavity at the bottom of the spout ring to increase the circulation amount. Affects mill production.

Increase Vertical Roller Mill Production

Milling material properties

  1. 1, the hardness of the material into the mill, such as high silicon material easy to grind poor, in order to meet the qualified raw material, will inevitably extend the material grinding time, increase the grinding cycle, the material within the mill can not be discharged in time, can only reduce production run .
  2. 2. If the particle size of the material is too large, the number of grinding will increase, the circulation volume will increase, the pressure difference will be high, and it will be hard to grind. It will also cause large vibration and unbalanced operation.

Therefore, according to the actual conditions of various manufacturers of raw materials, according to the material's easy to grind and granularity, etc., to control the operation of the mill, so as not to affect the output.

System air leakage

The air leakage of the mill body will inevitably cause the pressure difference to be small, the wind speed is not enough, and the powder cannot be taken away in time, which will affect the output of the mill. In addition, air leakage will occur at other parts of the system and the wind speed will be reduced, which will cause pipe accumulation. After the pipe has accumulated, the ventilation area will become smaller, and the lack of air volume will also affect the mill output. Therefore, it is necessary to timely check the air leakage problem of the processing system.

Layer thickness

After the material is fed into the grinding wheel, a certain material layer is formed. When the thickness of the material layer reaches a certain thickness, the grinding roller starts grinding. If the material layer is too thin, the grinding stress is too concentrated, and the grinding ability is reduced, which will inevitably lead to the impact of the roller lining plate and the disc lining plate. The vibration of the mill is large, and it is easy to jump. It also damages the lining plate, the tension bar, etc. Can not be thin layer control. If the thickness of the material layer is too thick, the grinding force will be converted into lateral stress, the material will also form a sliding shear, the slump of the material bed will increase, the grinding efficiency will decrease, and the vibration will be large; the material can not be timely Grinding and squeezing out of the grinding disc, falling to the outlet ring, increasing the amount of circulation, the pressure difference is large, the material can not be ground away in time, forming a vicious cycle, can only reduce production run, affecting the mill output.

The thickness of the material layer is generally controlled to be about 50-80mm. The principle is that the materials fed into the mill must be ground in time and flow to the next flow in a timely manner. The pressure difference of the system should not be controlled too high and the vibration can be kept within a reasonable range.

In addition to the above factors, there are many factors that affect the vertical roller mill output. For example, the mix structure leads to material segregation, air volume control, hot air temperature control, batching control, and so on, which can affect vertical roller mill output. In the actual production, it should be based on the analysis of the specific situation of the factory to solve.

In this case, the wear of the lining plate should be inspected periodically.features

When the vertical roller and the lining plate wear to a certain degree, they must be replaced in time, so as to avoid the vibration or other problems caused by the wear of the lining plate and affect the vertical roller mill operation.features

vertical roller mill

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