Large amount of Cement standard consistency water demand, the more cement paste to achieve the standard consistency of water consumption, the more cement mortar to achieve the required flow of water, and cement concrete to achieve a certain amount of slump water consumption are also larger, so the greater the water-cement ratio of mortar and concrete, the more space between the particles, the smaller the density, the cement and its concrete construction performance, mechanical properties and…

Ultrafine vertical mill is widely used in mine production because of its advantages of simple structure, low price, good crushing particle shape, easy maintenance, etc. In the mine crushing production line, the ultrafine vertical mill is generally used for secondary crushing to crush the material to the required size. The capacity of ultrafine vertical mill will directly affect the economic benefits of the whole…

After the blade is worn, the amount of returned sand is reduced, resulting in coarser grinding fineness. In addition, if the blades are severely worn, it will affect the life of the classifier, so check the blade wear in time during work and replace the worn blades in time.

The level of the overflow weir of the classifier affects the size of the sedimentation zone of the ore. In production, the level of the overflow weir of the classifier can be adjusted appropriately according to the…

The causes are as follows: 1) excessive powder accumulation or unbalanced wear on vertical roller mill blades; 2) The ground bolt is loose.

Solutions: 1) clean the dust on the wind blade or replace the wind blade; 2) Tighten the anchor bolts.

The main engine vibrates too much and produces noise

Causes: 1) the grinding roller does not rotate or the grinding ring is loose; 2) Metal objects…

The vacuum degree of the oil return pipe of the ultrafine vertical mill determines the oil level in the ultrafine vertical mill cavity. In order to keep the oil level in the ultrafine vertical mill relatively stable, the adjustment of the vacuum degree and pressure must be cautious. It is directly related to the lubrication state of the ultrafine vertical mill bearings.

If the oil pressure is…

The flange of the wind pressure sealing pipeline and the joint bearing on the sealing pipeline in the mill have poor sealing and air leakage, which reduces the wind pressure entering the grinding roll cavity;

When the mill is running or stopped, the unreasonable drawing of the wind in the mill will produce a slight negative pressure in the grinding roll cavity.

The above reasons may cause the air volume and air pressure to enter the…

The sealing of the ultrafine vertical mill is to prevent high-concentration dust in the mill from entering the ultrafine vertical mill cavity and to protect the ultrafine vertical mill bearings from damage. High pressure air is blown into the ultrafine vertical mill cavity through the sealing machine to form a positive pressure in the ultrafine vertical mill cavity to prevent The purpose of dust…

In production, ultrafine vertical mill will inevitably encounter various problems. Some time ago, a user left a message to the editor to ask what to do if the host of ultrafine vertical mill keeps vibrating. This is one of the common faults of ultrafine vertical mill, and it is also a problem that many users worry about. Today, the editor will present you with 15 reasons for vibration. There is always one that can solve your…

Therefore, the reason of ling damage must be found in time, replaced and supplemented.

It is very important to judge the quality of ultrafine vertical mill quickly and accurately in the process of vertical grinding. The simplest diagnosis method is to analyze and diagnose by "touch", "measure" and "look" by the experience accumulated by operators and simple instruments to identify the…

The accumulator plays the role of energy storage, pressure maintaining, shock absorption and shock absorption in hydraulic system. However, if ultrafine vertical mill is in unstable operation, the stretching rod acts frequently or the action range is too large, the nitrogen air bag shrinks frequently, which will cause the nitrogen airbag to burst.

The nitrogen in the accumulator airbag works like…

Reasonable selection of steel balls and lining plates is an important way to reduce lining wear.Therefore, related staff need to start with the size and quantity of the ball and the hardness ratio between the lining plate and the steel ball of the vertical roller mill to fundamentally reduce the loss of the lining plate during the operation of the vertical roller mill.

Generally speaking, the hardness…

Once the vertical roller mill is in abnormal operation state, it will also bring adverse effects on the use of lining plates.Generally speaking, the steel balls in the vertical roller mill are mixed with the material, so when the steel balls impact the liner in a parabolic state, the material will play a buffer role and grind the material down gradually.

When the equipment is operated under low load,…

The working principle of the vertical roller mill is to use the cylinder to turn and lift the steel ball to a certain height and then drop it in a parabola to impact the material in the cylinder, so that the material and lining can be fully friction.Therefore, under continuous operation, severe wear of steel balls and liners occurs, which is directly related to the hardness of the material.

In addition,…

Vertical roller mill is one of the most widely used and widely used equipment in the grinding and processing industry. According to the statistics of the competent department of the industry, the share of Vertical roller mills in domestic grinding equipment is as high as 70%.

However, as the production progressed, some users reported that the output of their vertical mill was reduced and…

The production efficiency of the grinder directly affects the profit of the manufacturer. For the factors affecting the production efficiency of the ultrafine vertical mill, more attention must be paid to it in the production. Today, we will discuss with you what factors affect the efficiency of the ultrafine vertical mill.

Material hardness is an important factor affecting the production efficiency of the grinder. The…

The three-way valve plate of the vertical roller mill is not flexible. It is often open or because of the high moisture content of the material. After the valve plate is removed, the system leaks seriously, causing slag spit.

The hot air pipe at the inlet of vertical roller mill is due to material deposition, resulting in a small flow of gas entering vertical roller mill, and insufficient air flow,…

1. If the three pieces (iron, wood, stone) inside the vertical roller mill cause great vibration and cannot be eliminated during operation, stop the vibrating vertical roller mill and wait for the temperature in the vertical roller mill to drop below 50°C. Contact the maintenance personnel to open the manhole of the coal pulverizer to inspect and clean the three pieces of the coal pulverizer;

2. Under…

Controlling the running state of the vertical roller mill is also an important measure to deal with the wear of the liner. When the vertical roller mill is running at low load, it is necessary to adjust the ore intake of the vertical roller mill in time to improve the grindability coefficient of the ore.

In the installation process of the liner, it is necessary to cut and repair the parts that do not…

The material of the liner and the heat treatment process directly determine the mechanical properties of the liner, and will have an important impact on the wear of the liner. If the material of the liner is improperly selected and the heat treatment process is unreasonable, the fatigue strength and service life of the liner will be greatly reduced, and the requirements of the vertical roller mill grinding…

Pay attention to the heating and cooling operation of the vertical roller mill. Most manufacturers do not pay attention to the heating and cooling operations of vertical roller mills, and fail to realize that reasonable heating and cooling operations can prolong the service life of key large bearings and wear parts.

When welding construction in the vertical roller mill, attention must be paid to the…