Structural Analysis of Composite Casting Liner for Mining Ball Mill

The structure of the composite casting ball mill liner

When studying the material of the composite casting liner of the mining ball mill, the research on the structure of the composite casting liner of the mining ball mill has also made rapid progress. There is a complementary relationship between the material of the composite cast liner of the mine ball mill and its structure. If it is a composite cast liner of the mine ball mill for steel rolling, the fracture marks of the composite cast liner of the mine ball mill are limited to several types; If cast steel or cast iron liner is used, the shape of the fracture traces of the composite cast liner of the mine ball mill can be compensated by casting and heat treatment, and it is not easy to crack at the grain boundary or produce yield stress.

Materials with higher impact resistance also have higher yield stress resistance, and have better toughness and fracture resistance than lining materials with higher rigidity. The composite casting liner material of the ball mill mining also plays an important role in the fastening method and the fixed structure of the liner. In short, the structure of the composite casting liner of the mining ball mill has an impact on the overall flexibility of use, grinding efficiency, the service life of the composite casting liner of the mining ball mill, overflow ball mill and dry ball mill, and the grinding fee and replacement cost per ton of ore.

The surface shape of the composite cast liner of the mining ball mill should minimize the friction loss between the ball and the surface of the liner, which not only increases the service life of the composite cast liner of the mining ball mill, but also saves costs and improves efficiency. For fine ore grinding, use a fully smooth or fine-edge mining ball mill to composite casting liner; For rough grinding, use a mining ball mill with a certain angle to composite casting liner, especially large-scale ball mills generally use sawtooth metal Liner. Angular spiral ball mill composite casting liner can obtain better results in general grinding, and its efficiency and life are better than other liners, but it is not suitable for extra-large mills because of the barrel line of extra-large mills. The speed is fast, and the unstable efficiency of the angular spiral liner will also be compromised.

The shape of the working surface of the composite casting liner of the mining ball mill is a single piece of the ball mill liner of the mining ball mill directly fixed on the cylinder with bolts. The replacement of the composite casting liner of the mining ball mill is easy for overall maintenance, but the bolt holes must be sealed; The second type is a strip-shaped ball mill composite cast liner for mining. This type of composite cast liner for a ball mill mining is fixed with a wedge bead and pressed with an end cover liner at the same time. This mining ball mill type of composite casting liner is simple to manufacture, and the number of bolt holes is small, which enhances the overall strength of the cylinder, but it is difficult to repair and replace.

The failure mode of the bimetal composite casting ball mill liner

During the use of the mining mill, the bimetal composite cast liner of the mining ball mill will have different hardness due to different minerals, resulting in friction loss. This friction loss will reduce the service life of the bimetal composite cast liner of the mining ball mill. Under different working environments, the service life and working efficiency of the bimetal composite casting liner of the mining ball mill will be different. At the same time, although the bimetal composite cast liner material of the mining ball mill can be used on various mills, the service life of the bimetal composite cast liner of the wet grid ball mill will be greatly reduced if it is under wet grinding conditions. Therefore, under normal working conditions, try to avoid the failure of the bimetal composite cast liner of the mining ball mill as much as possible. The failure of the bimetal composite cast liner of the mining ball mill will cause rapid wear of the machine tool and breakage of the panel. In order to facilitate the use of the bimetal composite cast liner of the mining ball mill, the bimetal composite cast liner of the mining ball mill for mining processing is required to have a certain degree of wear resistance and toughness.

The service life of the bimetal composite cast liner of the mine ball mill is increased. The working efficiency of the machine tool must be set. In the foot area, the machine tool grinding ball will sometimes fall or fly out, which will cause a greater impact on the machine tool. The inertia of the machine tool will cause certain damage to the bimetal composite casting liner of the mining ball mill during the collision between the machine tool and the grinding ball. On the surface of the bimetal composite casting liner of the mining ball mill, a certain strain pressure will also be generated due to ore or abrasive particles, which causes the plastic deformation of the bimetal composite casting liner of the mining ball mill. Due to the bimetal composite casting of the mining ball mill, the surface of the liner is plastically deformed under the pressure of mineral materials, which will not only reduce the service life but also cause accidents.

After the plastic deformation of the bimetal composite cast liner of the mining ball mill, the plastic deformation will accumulate to a certain extent over time, so that the metal surface material of the bimetal composite cast liner of the mining ball mill will fall off due to fatigue cracks. After the metal surface of the bimetal composite casting liner of the mining ball mill is separated, the surface hardness of the bimetal composite casting liner of the mining ball mill will be greatly reduced. This kind of low hardness surface mining ball mill bimetal composite casting liner will produce on the surface a lot of deep slip marks. The bimetal composite cast liner of the mining ball mill will produce a kind of mutual force during the crushing operation. This mutual force may cause micro-cutting and wear on the surface of the bimetal composite cast liner of the mining ball mill. At the same time, the crushing operation will be accompanied by the production of ore slurry, which has a certain corrosive effect, and this corrosive effect will make the wear of the bimetal composite casting liner of the mining ball mill more serious.

Structure technology of composite casting ball mill liner

For the process of composite casting liner of mining ball mill, the form of double-layer isolation is used. The clapboard can be made into an arc shape during the production process, and the non-working surface of the composite casting liner of the mining ball mill is made into a drum shape. The position of the double-layer baffle is placed at 1/3 of the arc thickness of the composite casting liner of the mine ball mill, and the thickness of the double-layer baffle is about 5mm. Both sides of the middle partition of the composite casting liner of the mine ball mill. It is necessary to design the pouring and riser system in advance to form a double pouring and riser system. The internal pressure pouring molding system is selected for the composite casting liner of the mine ball mill to minimize the direct contact of the metal liquid with the double-layer partition while pouring. The casting temperature of the high chromium cast iron used in pouring is about 1560 degrees, and the casting temperature of the carbon steel of the composite cast liner of the mine ball mill is above 1480 degrees. The riser areas on both sides are finished in the form of casting, and the riser areas are mostly equipped with partitions, but they will not affect the operation. The pouring process has strict requirements on accuracy, and the pouring speed control must be strictly in accordance with the process, not too fast. Ensure that the liquid level rise process in the partition area is consistent.

Reference

Ball Mill, Working Principle, Types, Parts, Applications and Advantages

Conclusion of ball mill liner

In summary, the production cost of the composite casting liner of the mine ball mill is low, the use performance is superior, it is suitable for various working environments, and the work efficiency is stable. We are one of the top industrial grinding mill manufacturers. The composite casting liner of the mine ball mill has good mechanical properties and relatively high impact resistance, At the same time, it has high toughness, which can fully withstand the impact force brought by work. The composite cast liner of the mine ball mill has the advantages of safety, high efficiency, low cost, long service life, etc. It is the best choice for the large mine ball mill.