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Silicon Hydrochloric Acid Products

In addition to the concentrator, it can also be used for grinding cement, silicon hydrochloric acid products, new building materials, refractory materials and glass ceramic materials. The vertical roller mill liner is one of its main accessories.

Material And Application Of vertical roller mill lining plate the materials of vertical roller mill lining plate mainly include high manganese steel, alloy steel, hard steel, chromium steel, alloy cast iron, magnetic lining plate, rubber lining plate, etc. 

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.

In addition to wear resistance and impact resistance, its noise reduction effect is unmatched by other lining plates.

The Lining Plate Of Cement Raw Material Milling

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.

The rubber lining plate is the first manufacturer of used as the lining plate of cement raw material milling.

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.

In addition to wear resistance and impact resistance, its noise reduction effect is unmatched by other lining plates.

Increasing The Effect Of Repeated Grinding

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.

During wet and dry conical lattice calcite grinder milling plant machine wet grinding, materials are taken away by water flow; During dry grinding, the material is taken away by air flow. Ultrafine mill features large double row self-aligning roller bearings instead of sliding bearings.

Ultrafine mill is a common grinding equipment in concentrator. Compared with other calcite grinder milling plant machine 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 calcite grinder milling plant machine equipment. 

Self Grinding Of The Steel Ball

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.

Surfaces And Seals Of All Working Parts

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.

Concentration And Clogging Of The Underflow Port

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.

The Feed Pressure Of Ultrafine Vertical Mill

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;

Consumption Of Grinding Medium And Lining Plate

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.

How To Improve Classification Efficiency Of Mill

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.

To Achieve Qualified Grinding Fineness

More crushing and less grinding will reduce the grinding particle size of the ore milling plant. The larger the grinding particle size, the greater the work done by the ore milling plant on the ore, and the grinding efficiency of the ore milling plant will naturally be affected.

In order to achieve qualified grinding fineness, the workload of ore milling plant is bound to increase and the energy consumption will also increase.

To reduce the feeding particle size, it is required that the particle size of crushed products is small, that is, "more crushing and less grinding".

In this way, the feeding particle size is appropriate, and the grinding efficiency of ore milling plant will be improved.

Calcite To Remove Iron Containing Impurities

However, the cost of chemical bleaching is relatively high, which is usually used for calcite concentrate that needs further purification after impurity removal.

This method can improve the chemical reaction activity of roasted products, greatly improve the whiteness of calcite, and obtain high-grade calcite grinder milling plant machines.

Therefore, in the actual production, it is recommended that the mine owners select qualified manufacturers for beneficiation test, and adopt a combination of multiple processes to improve the product quality of calcite.

Roasting purification: magnetization roasting, high-temperature roasting or chlorination roasting can be carried out by taking advantage of the differences in chemical composition and reaction activity between impurities and calcite to remove iron containing impurities, carbon containing impurities, sulfide and other impurities in calcite.

High Effectively Solved The Problem

Magnetic separation mainly uses the magnetic difference between gangue minerals and silica sand to remove these colored impurities. Magnetic separation is more effective for magnetite, ilmenite and other strong magnetic minerals or iron filings mixed in the processing process.

For weakly magnetic minerals, there are two main methods: one is roasting to turn the minerals into strong magnetic iron oxide, and then grinding; Another method is to use high gradient and strong magnetic field grinding method for grinding.

Because the silica sand grinding method does not need to use chemicals and will not pollute the environment, it is widely used in the process of non-metallic beneficiation.

The grinding method has effectively solved the problem of the development and utilization of low-grade silica sand that does not have commercial mining value due to the high content of iron ore.

The Fineness Of Grinding Products

This phenomenon is mainly due to the small feeding particle size, short residence time of ore in the ultrafine vertical mill and fast speed. 

It should be noted that when the grinding products are required to be coarse, the variation of mill productivity with feed particle size is obvious, while when the grinding products are required to be fine, the variation of mill productivity with feed particle size is not very prominent. 

When the feeding particle size, i.e. the grinding particle size, is small, the grinding fineness is easy to achieve. However, the fineness and productivity are contradictory. 

Under the condition of the same feed particle size, the production capacity of the mill decreases with the increase of the fineness of grinding products.

Oil Leakage Of Vertical Roller Mill

Poor lubrication includes improper lubricant selection, improper filling amount or oil level of grease, deterioration of oil (grease) or lack of oil (grease).

1) The selection of lubricant and lubrication method are unreasonable

The rolling bearing of vertical roller mill lubricant shall be selected according to the bearing operating temperature, speed index, load characteristics, lubrication mode and other factors. If the lubricant is improperly selected and the viscosity is too low or too high, it is difficult to form oil film, which will make the heat generated during bearing operation unable to be taken away and cause bearing heating.

2) Improper amount of oil (grease)

Too little or too much oil (grease) will cause fever due to lack of oil or too much oil and large stirring.

3) Failure to change oil on time, deterioration of lubricating oil and impurities such as iron filings in lubricating oil lead to deterioration of lubrication condition.

4) The bearing is short of oil, hot and invalid due to oil leakage of vertical roller mill bearing seat and other reasons.

Improper Bearing Selection Of Ore Milling Plant

During the use of ore milling plant, many users find that their ore milling plant will produce bearing heating. Some heating phenomena occur in the initial running in period and return to normal after running for a period of time; Others last for a long time and have a great impact on production. Today, we mainly introduce the causes of heating of ore milling plant bearing.

Ore milling plant is a heavy-duty equipment. It is started with heavy load. During operation, the load is heavy and there is impact load. Therefore, special attention should be paid to two aspects when selecting rolling bearings:

(1) Load selection of bearing. If the selected bearing has low rated load and serious bearing wear during operation, it will cause bearing heating and shorten service life.

(2) Selection of bearing clearance. Too small clearance is not conducive to the formation of oil film and the elimination of thermal expansion. Especially when the ambient temperature is high, too small original radial clearance will make the clearance of the bearing smaller or even zero due to the expansion of temperature rise during operation, which is easy to cause bearing heating.

Requirements For LM Vertical Roller Mill

If the feed particle size is large and the discharge particle size is small, two-level milling or multi-level milling is often required. Different milling levels also have certain requirements for LM vertical roller mill types.

Generally, vertical roller mill is often used as primary mill, while counterattack vertical roller mill, conical vertical roller mill and hammer vertical roller mill are used as secondary mill or even tertiary mill.

Consider the impact of material water content on milling productivity. When the water content is too large, fine-grained materials will agglomerate or stick to coarse-grained materials due to the increase of humidity, so as to increase the viscosity of materials.

When a certain viscosity is reached, the materials will be bonded in the vertical roller mill inlet and milling chamber, which greatly reduces the ore discharge speed, aggravates the blockage of inlet and outlet, and reduces the productivity.