In addition, the high manganese steel lining plate is prone to creep, extension and surface transformation, which will cause reverse bow deformation and can not achieve ideal work hardening. Now the high manganese steel lining plate has been gradually replaced by alloy steel lining plate and rubber lining plate.

The rubber lining plate is the first manufacturer of used as the lining plate of vertical roller mill. 

Using the advanced "liquid nano formula • normal temperature and high frequency curing" glue making process, the wear index of wear-resistant rubber plate has reached 128%, the rebound has reached 80%, the tensile strength has reached 23.5mp, and the tear strength has reached 168N / mm. 

However, high manganese steel lining plate is rarely used now. Although it has sufficient impact toughness, cold hardening of the surface when subjected to a certain impact, it is more hard and wear-resistant, cement raw material milling processing technology requirements are very high and the price is expensive.

In addition, the high manganese steel lining plate is prone to creep, extension and surface transformation, which will cause reverse bow deformation and can not achieve ideal work hardening. Now the high manganese steel lining plate has been gradually replaced by alloy steel lining plate and rubber lining plate.

The alloy steel lining plate is wear-resistant and impact resistant, and the reasonable alloy element formula makes the lining plate have good physical and chemical properties, and the service life is more than twice that of high manganese steel.

In the cylinder, the materials are crushed due to the throwing impact and self grinding of the steel ball and the ore itself. Due to the continuous feeding of materials, the pressure causes the materials in the cylinder to move from the feeding end to the discharge end, and the materials reaching the particle size of finished products are discharged from the discharge end of the cylinder. 

Its overall structure changes the original calcite grinder milling plant machine structure and integrates the body and chassis. In installation, it can be placed on the foundation plane once. Principle of calcite grinder milling plant machine schematic diagram of calcite grinder milling plant machine principle mainly rotates it slowly through the transmission machinery, and the materials are fed from the feeding end of the cylinder. 

The grooved annular lining plate is adopted to increase the contact surface of nodular ore, strengthen the grinding effect, improve the ore and reduce the energy consumption; The integral frame is adopted to facilitate civil construction and equipment installation.

Ultrafine mill is a common grinding equipment in concentrator. Compared with other ultrafine mill equipment, it can save energy and reduce consumption by 30%. For fine-grained mineral processing, it can increase the processing capacity by 15 ~ 20% compared with other ultrafine mill equipment. 

Its overall structure changes the original ultrafine mill structure and integrates the body and chassis. In installation, it can be placed on the foundation plane once. Principle of ultrafine mill schematic diagram of ultrafine mill principle mainly rotates it slowly through the transmission machinery, and the materials are fed from the feeding end of the cylinder. 

In the cylinder, the materials are crushed due to the throwing impact and self grinding of the steel ball and the ore itself. Due to the continuous feeding of materials, the pressure causes the materials in the cylinder to move from the feeding end to the discharge end, and the materials reaching the particle size of finished products are discharged from the discharge end of the cylinder.

After the barite ore grinding plant idles for the specified time, stop the barite ore grinding plant, carefully check all working parts, tighten the lining plate bolts and eliminate the defects found. After there is no problem with the barite ore grinding plant idling, the load test run can be carried out. 

Load test run shall be gradually fed until full load. Operate for 10-20 hours after normal feeding. The following requirements shall be met during load operation. The work shall be stable without periodic sharp vibration. 

The current of the main motor has no abnormal fluctuation. The lubrication of each lubricating point is normal, and the temperature of the main bearing shall not exceed 60 ℃. The bolts, Manholes, flange joint surfaces and seals of all working parts of the mill shall be free of water leakage, slurry leakage, etc.

When the grit nozzle is in the shape of a rope, the size of the grit nozzle can be appropriately increased, and the cyclone operation can be stopped to clean up the blockage. The above are the common failure causes and countermeasures of aggregate crushing value conclusion. 

For equipment to operate stably and efficiently, in addition to selecting equipment types that meet the grinding process, daily maintenance and maintenance are also particularly important. 

It is recommended that mine owners consult with professional hydrocyclone manufacturers when purchasing, and comprehensively consider the grinding process and grinding equipment to further improve the work efficiency and economic benefits of the grinding plant.

Abnormal overflow concentration and fineness. During operation, the operator of the LUM ultrafine vertical mill also needs to check the overflow concentration and fineness of the cyclone regularly.

Increasing overflow concentration or "overflowing roughness" is usually caused by increased ore concentration and clogging of the underflow port.

If it is found that "overflow is running thick", first check whether the underflow port is blocked, and then check the feed concentration, and then adjust it according to the specific situation. If the underflow port is blocked, open the underflow port to clear the blockage.

Generally, the feed pressure of the LUM ultrafine vertical mill should be stable as required, and no large fluctuations should occur, otherwise it will damage the performance of the equipment and affect its classification effect.

The large fluctuation of the feed pressure is usually caused by the lack of the pump feeder due to the drop of the pump tank liquid level or the air traction, or the blockage of sundries in the pump.

If the LUM ultrafine vertical mill has a drop in feed pressure after long-term operation, it is mainly caused by pump wear.

If the feed pressure fluctuation is caused by the drop of the pump tank liquid level, it can be adjusted by increasing the liquid level, or closing one or two cyclones, or reducing the pump speed;

The ultrafine vertical mill will cause "belly swelling", that is, overload. At this time, the sound of the ultrafine vertical mill is dull and weak, and the grinding function will be lost.

At this time, the ore feeding shall be reduced or stopped immediately, the overflow concentration shall be increased, and the ore feeding shall be carried out after the mill returns to normal operation.

In addition, if the ore feeding is insufficient, the ultrafine vertical mill will have the situation that the ore discharge particle size will become finer and the return sand volume will be reduced.

When the ore feeding is significantly insufficient, the impact sound of lining plate and steel ball will occur, resulting in the useless consumption of grinding medium and lining plate.

On the one hand, reduce the grinding amount, on the other hand, recover useful minerals in time, which can improve the grinding efficiency of vertical roller mill. The influence of improving classification efficiency on grinding efficiency is self-evident.

High classification efficiency means that the qualified particle size can be discharged timely and efficiently, while low classification efficiency means that most qualified particle size products cannot be discharged and returned to vertical roller mill for regrinding, which is easy to cause over grinding.

In production, two-stage classification or improved classification equipment can be used to improve classification efficiency and vertical roller mill grinding efficiency accordingly.