What are the requirements for installing a ball mill liner?

<><1. The ball mill lining plate is the most easy part of the ball mill to wear and fall off, so it is necessary to choose wear-resistant materials, must have good strength, and must meet the shape and size required by the drawings. Before installing the liner, the liner should be inspected and trimmed, its back and surrounding should be smooth and flat, and the bolt hole should be thoroughly cleaned and the casting flash should be removed, so that the bolt can be smoothly penetrated. Its north and surrounding sides should be trimmed with grinding wheels as appropriate to meet the installation requirements.

2. Safety first, the power supply must be effectively cut off and the power supply and delivery measures must be effectively managed; The installation process prevents injury accidents, is supervised, and has safety measures and programs.

3. When installing the lining plate in the ball mill, a layer of 1:2 cement mortar should be applied between the inner wall of the cylinder and the lining plate, and the lining bolts should be tightened while wet. The gaps between the liners are also smoothed with sand and mortar.

The lining plate should be filled with compressive strength grade cement mortar between the rear end lining plate and the end cover of the cylinder assembly.

4. The bolts that fix the lining plate should be carefully padded to prevent the leakage of mineral powder, and the bolts of the fixed end lining plate should not be filled with cement mortar, and should be able to rotate or enter and exit.

5. The lining plate is generally directional, and attention must be paid to it when installing.

6. The arc length of all circumferential gaps should not exceed 315mm, and the excess places should be wedged with steel plates to cut them off.

7. The gap between adjacent liners is not more than 5 10mm.

8. A compartment should be laid between the lining plate and the inner surface of the cylinder according to the design requirements, if there is no requirement, the compressive strength grade cement mortar can be filled between the two, and the excess part should be extruded through the solid lining bolts, and the lining bolts should be tightened again after the cement mortar is solidified.

9. When installing the lining plate with rubber pad plate, open the roll of rubber plate 3 to 4 weeks before installation to make it elongate freely; When using rubber sheets, the long side of the rubber sheet should follow the axial direction of the cylinder, and the short side should follow the circumferential direction of the cylinder.

10. Carefully check the bolt holes and geometry of the bolts of the lining plate, and carefully clean the flashes, burrs and protrusions on the bolt holes and bolts of the lining plate, so that the bolts can freely penetrate into the required positions.

11. The complete set of liner bolts shall be composed of dazzling bolts, dustproof washers, flat washers, spring washers and nuts; To prevent dust leakage, do not forget to use a dust mat when using it.

12. When fastening the lining plate bolts, a torque wrench should be used for operation, and the lining bolts of different specifications should be tightened according to the corresponding tightening torque requirements, and the fastening process must be tightened in stages. Before installing the liner, the dirt and dirt in the cylinder should be removed. The cement mortar can be put into operation only after it has solidified to meet the strength requirements.

After running for a period of time, the bolts should be tightened again, and the inspection should be strengthened, and if the bolts are found to be loose, they should be tightened in time.

The ball mill is lined when it leaves the factory, which can protect the ball mill from outside air and external pollutants, reduce noise, and prevent pollution of the ball mill by dust, oil, etc. The importance of the liner lies in the fact that it can reduce the internal vibration amplitude, reduce the impact of vibration on the equipment, and can well protect the service life of the machine. There are also many kinds of materials for lining plates, which are generally made of steel plates, stainless steel, aluminum alloys and other materials.

When the ball mill is installed on the body of the ball mill at the factory, it should be paid attention to whether the bolts are fixed firmly, and whether there is rust or damage on the surface of the lining plate by checking whether there is rust or damage on the surface of the lining plate, as well as the accurate installation position of the lining plate, so as to ensure the practicability and safety of the lining plate.

How to install the boltless lining plate of the ball mill The installation of the boltless lining plate of the ball mill is generally based on the inlay method, first of all, a layer of 1:1 asbestos cement mortar is coated on the contact surface between the bottom surface of the lining plate and the cylinder to make the lining plate balanced. Liner inlay can start from the lower semicircle of the cylinder, and then use the support frame to support the middle circle, and then slowly rotate the ball mill 1 4 circles, and after the lower part of the 1 4 circles, the second support is carried out, and then slowly rotate the cylinder, and the remaining 1 4 circles are built.

When the stare is finished for a week, because the liners are squeezed against each other, a solid arch structure is formed, and in order to be firm, an iron plate should be driven between the gaps in the ring of the liners. When installing the boltless liner with semicircular pin hole on both sides, after the liner is squeezed into each other, a wedge-shaped pin should be driven into the pin hole, and a special wedge-shaped pin is driven into the pin hole at the end of each circle of liner at the junction of the end and the end, and a special wedge-shaped pin is driven into the pin hole to be fixed, in order to make the liner plate fixed more firmly, a liner can be bolted to fix a liner plate for Kai pants every certain number of liners when inlaying the liner.

1. Before installing the lining, the dust and dirt in the cylinder should be cleaned, and when the ball mill installs the lining, a layer of 1:2 cement mortar should be coated between the inner wall of the cylinder and the lining, and the liner bolts should be tightened while wet. The gaps between the liners are also smoothed with sand and mortar.

2. Before installing the lining plate of the ball mill, the lining plate should be inspected and trimmed, the back and surrounding sides should be smooth and flat, and the bolt holes should be thoroughly cleaned and the casting flash should be removed, so that the bolts can be penetrated smoothly. 3. The bolts fixing the lining plate should be carefully padded with a gasket to prevent the leakage of slurry. 4. The directional lining plate should be reversed in the direction.

The long mill is generally divided into two bins by a bulkhead plate. The feeding end is the first bin, and the first bin is the stepped liner. When installed, the thin end of the stepped liner should be consistent with the direction of the arrow in the direction of rotation when the mill is working.

The grate hole of the bin plate is tapered, and the large end of the cone should be installed in the same direction as the ridge punch discharge of the ball mill. The cylinder liner does not form an annular gap. 5. When installing the bulkhead, you should wear all the bolts, and then tighten the bolts step by step in three times.

At the same time, it should be noted that the connecting bolts on the central disc in the cylinder should be tightened first, and then the bolts on the cylinder should be tightened. After all the bolts are tightened, the nut of the bolt on the central disc in the cylinder is welded with electric "spot welding" to prevent loosening. 6. The cement mortar can be put into service only after the solidification meets the strength requirements.

If the bolt is loose during operation, it must be tightened in time.

Summary. Pro, 4In order to ensure that the liner material completely covers the inner surface of the ball mill, the shape of the liner material also needs to be adjusted. 5.Install the lining material. To do this, you need to prepare the liner materials first and make sure that they are placed in the correct place.

Dear, hello, the calculation of ball mill liner usually involves the following aspects:1Measure the diameter and length inside the ball mill to determine how much liner material is needed.

Judgment 2Choose the appropriate lining material for the hall. Commonly used materials include high-chromium alloy steel, rubber, and ceramics.

3.Based on the thickness of the liner material and the diameter and length of the ball mill, calculate how much liner material is needed.

Pro, 4In order to ensure that the liner material completely covers the inner surface of the ball mill, the shape of the family liner material also needs to be adjusted. 5.

Install the lining material. To do this, it is necessary to prepare the liner materials first and ensure that they are placed in the position of the positive panicle band.

To put it simply, common liners are divided into metal liners, ceramic liners, and rubber liners.

Ball mill is a common equipment, mainly used for milling, ball mill is a common equipment.

The common classification methods of the more common ball mill liners are as follows:

According to the installation site, it can be divided into head end cover lining, cylinder liner and grinding door lining.

According to the material, it can be divided into metal lining, rubber lining, cast stone lining, etc. (metal lining is generally used in the cement industry).

According to the shape of the working surface, it can be divided into flat liner, corrugated liner, ridge lining, beading lining, stepped lining, hemispherical lining, tapered lining, hyperboloid lining, corner spiral lining, groove lining, etc.

According to the connection method, it can be divided into bolt lining plate and boltless lining plate.

According to the function, it can be divided into ordinary liner and graded lining.

The wear-resistant liners used in ball mills are generally machined from high-strength wear-resistant plates, such as JFE-C400, JFE-C500, DILLIDUR 450V and so on.

In addition, the processing technology and technology of the ball mill lining plate are also very important, and it is best to find a professional special steel processing company to do it, such as French Steel.

1. Iron-based alloy material lining.

2. Rubber and ceramic lining.

3. New and practical metal magnetic liner.

Ball mill liner materials are usually made of chrome cast iron, medium chromium alloy steel, multi-alloy steel and other materials. The end material is high-chromium cast iron, which has the best wear resistance, the longest life and the highest cost performance. The second is the highest production cost, followed by the mid-range medium chromium alloy steel material, which has high hardness, low abrasion, good toughness, no loss of roundness, and less crushing.

Gold and multi-alloy steel not only has wear resistance, but also has a relatively low production cost, so it is also a suitable material for the lining plate of the ball mill barrel.

The alloy steel liner in the high-wear-resistant and non-ferrous metal impact double-medium quenching of Henan Dashan has been scientifically and reasonably formulated with alloying elements, so that the lining plate has good physical and chemical properties, with hardness HRC45-55 or more, impact toughness value of more than 25J, and service life is more than 2 times that of high manganese steel. Able to withstand huge impact forces. The surface shape of the liner can be maintained for a long time in the work to ensure that the output of the mill is increased by more than 5%.

High strength and high toughnessIn the quenching process of Henan Dashan non-ferrous metal liner, a special dual-medium quenching agent with good thermal stability is used as the medium, so that the product can achieve the combination of high strength, high hardness and high toughness, so as to meet the process requirements of wear resistance.

The lining plate of the ball mill in Henan Dashan non-ferrous metal high manganese steel has been gradually replaced by the medium alloy steel lining, but with the continuous application of the medium alloy steel lining in the ball mill lining, it has gradually replaced the manganese steel and other liners to become the mainstream of market development.

In addition to protecting the cylinder, the cylinder lining also has an impact on the movement law of Henan Dashan non-ferrous metal grinding body, in order to adapt to the requirements of various different working states (crushing or fine grinding), the shape of the lining material is also different. When the main grinding is used, the lining plate is required to have a strong lifting ability to the grinding body, and the non-ferrous metal of the lining plate Henan Dashan should have good impact resistance, when the fine grinding is the mainstay, the protrusion of the lining plate is relatively small, the lifting effect of the grinding body is weak, the impact is small, and the grinding effect is strong. Henan Dashan non-ferrous metal lining is required to have good wear resistance.

The ball mill lining plate is mainly made of high manganese steel, high chromium steel and alloy steel.

The lining plate of the ball mill has been gradually replaced by the medium alloy steel lining plate in China, but with the continuous application of the medium alloy steel lining plate in the ball mill lining plate, it has gradually replaced the manganese steel and other lining plates to become the mainstream of market development.

In addition to protecting the cylinder, the cylinder lining also has an impact on the movement of the grinding body, and the material of the shape of the lining plate is also different in order to meet the requirements of various working states (crushing or fine grinding). When mainly crushing, the lining plate is required to have a strong lifting ability to the grinding body, and the lining plate should have good impact resistance, when the fine grinding is the mainstay, the protrusion of the lining plate is relatively small, the lifting effect of the grinding body is weak, the impact is small, and the grinding effect is strong. The liner is required to have good wear resistance.