Polyurethane combined lining plate for ball mill
By using corrugated and trapezoidal combined lining plates made of polyurethane materials in the ball mill, the problem of low efficiency of special sand grinding by the ball mill is solved, and more efficient matte effect and lower wear are achieved, improving product uniformity and equipment reliability are improved. sex.
Patent Information
- Application Number
- CN202421231137.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Due to the structure and material reasons, the ordinary lining plate used in the ball mill limits the efficiency of the ball mill grinding special sand, resulting in high waste output and low special sand output efficiency.
Combined linings made of polyurethane materials, including corrugated linings and trapezoidal linings, enhance the grinding effect and reduce wear through alternate arrangements and specific structural designs (such as corrugated structures, trapezoidal structures, grooves and protrusions, etc.).
It improves the frosting effect and product uniformity of the ball mill, reduces the yield of fine powder, extends the service life of the lining, and reduces the energy consumption and noise of the equipment.
Smart Images
Figure CN222518748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of special sand manufacturing equipment, in particular to a polyurethane combined lining plate for a ball mill and the ball mill. Background Art
[0002] Specialty sand is a high-performance material used in industries such as casting, glass manufacturing, and construction. Its preparation process needs to be strictly controlled to meet specific application requirements. The raw materials for specialty sand are generally high-purity quartz sand, silica sand, or other specialty mineral sands.
[0003] The preparation process of special sand is to crush large pieces of raw materials to obtain suitable particle sizes; then use screening equipment to classify the sand particles and screen out particles that meet the specifications; wash the screened sand particles to remove impurities and dust on the surface. Usually, water or chemical detergents are used to wash to ensure the purity of the sand particles.
[0004] At present, traditional technology uses jaw crushers or hammer crushers to coarsely crush the raw materials, and then uses cone crushers or roll crushers to crush the raw materials to the required particle size. When mechanical equipment such as jaw crushers, hammer crushers, cone crushers or roll crushers are used to crush the raw materials, a large amount of waste, namely fine powder, will be generated. This fine powder accounts for 45% of the production of special sand. This fine powder is difficult to handle and has no production function, resulting in waste of resources and environmental problems.
[0005] In order to solve the technical problem, a method of utilizing the rolling and impact action of a ball mill to efficiently crush raw materials is proposed, which can grind large pieces of raw materials into fine particles. The crushing efficiency is high and the required particle size distribution can be quickly achieved.
[0006] As a common industrial equipment, ball mills usually need to meet the requirements of standardized design. Therefore, the structure of the liner installed in the ball mill is often relatively simple, generally cylindrical or approximately cylindrical. Such a design is easier to mass produce and install. In addition, the liner in the ball mill is made of metal material in order to withstand the high-speed rotation and wear of the material inside the ball mill and ensure the stable operation of the equipment.
[0007] However, in the production process of special sand, the cylindrical shape of the ball mill liner limits the force and movement of the special sand particles during the grinding process, increasing the waste output, i.e. the fine powder content. At the same time, due to the high hardness and strength of the metal liner, the metal liner will still wear after long-term use, especially under high strength, high temperature and high pressure, and the wear rate is faster. This wear will cause the surface of the liner to be uneven and fail, resulting in a higher output of fine powder, thus affecting production efficiency. Utility Model Content
[0008] The utility model proposes a polyurethane composite liner for a ball mill to solve the problem that in the process of grinding special sand by a ball mill, the ordinary liner used limits the grinding effect of the ball mill due to structural and material reasons, resulting in high waste output and low special sand output efficiency.
[0009] The utility model is realized by the following technical solutions:
[0010] A polyurethane composite liner for a ball mill comprises a corrugated liner and a trapezoidal liner. The corrugated liner comprises a bottom layer, a middle layer and a surface layer arranged in sequence from bottom to top; the trapezoidal liner comprises a bottom layer, a middle layer and a surface layer arranged in sequence from bottom to top; the corrugated liner and the trapezoidal liner are arranged at intervals, and the head and tail of the corrugated liner and the trapezoidal liner are aligned with each other.
[0011] Furthermore, the bottom layer and the middle layer of the corrugated lining are rectangular structures, the bottom layer and the middle layer are fixedly connected, the bottom of the bottom layer is arc-shaped for fitting the inner wall of the ball mill, the surface layer of the corrugated lining is provided with a plurality of grooves, protrusions are provided between the grooves, each of the grooves and the protrusions extends along the length direction of the corrugated lining, and the surface layer and the middle layer are fixedly connected.
[0012] Furthermore, the bottom layer and the middle layer of the trapezoidal lining are rectangular structures, the bottom layer and the middle layer are fixedly connected, the bottom of the bottom layer is arc-shaped for fitting the inner wall of the ball mill, the surface layer of the trapezoidal lining is provided with a trapezoidal structure, the trapezoidal structure is a symmetrical trapezoid, the two non-parallel edges of the trapezoidal structure are inclined in the width direction of the lining, the trapezoidal structure runs through the surface layer, and the surface layer and the middle layer are fixedly connected.
[0013] Furthermore, there are six grooves, which are arranged in parallel, and there are five protrusions, which are arranged in parallel, and the grooves and protrusions are smoothly connected.
[0014] Furthermore, a fixing through hole is provided in the middle section of the surface layer of the corrugated lining board, and the fixing through hole is circular and penetrates the thickness of the corrugated lining board.
[0015] Furthermore, a fixing through hole is provided in the middle section of the surface layer of the trapezoidal lining plate, and the fixing through hole is circular and penetrates the thickness of the trapezoidal lining plate.
[0016] Furthermore, there are two fixed through holes on the corrugated lining plate and two fixed through holes on the trapezoidal lining plate, and the two through holes are evenly distributed along the length direction of the lining plate.
[0017] Furthermore, the corrugated lining plate and the trapezoidal lining plate are made of polyurethane.
[0018] The utility model also proposes a ball mill. The inner wall of the ball mill is provided with a combined lining plate. The combined lining plate is arranged in the form of a corrugated lining plate, a corrugated lining plate and a trapezoidal lining plate.
[0019] Beneficial effects of the utility model:
[0020] (1) The utility model proposes a polyurethane composite liner for a ball mill, which can increase the grinding effect of the ball mill by alternating the arrangement of the corrugated liner and the trapezoidal liner. The corrugated structure of the corrugated liner can increase the grinding and friction between the materials and improve the grinding efficiency; while the trapezoidal structure of the trapezoidal liner can effectively push the materials upward, increase the movement trajectory of the materials, and make the grinding more uniform.
[0021] (2) The utility model proposes a polyurethane composite liner for a ball mill, which can control the particle shape of the material through the structure of the corrugated liner and the trapezoidal liner. The wave shape of the corrugated liner and the trapezoidal structure of the trapezoidal liner can make the material receive forces in more directions during the grinding process, so that the particles are more evenly milled and ground, avoiding local excessive crushing and reducing the output of fine powder;
[0022] (3) The utility model proposes a polyurethane composite liner for a ball mill. The bottom layer and the middle layer of the corrugated liner and the trapezoidal liner adopt a rectangular structure and are fixedly connected together, which enhances the overall stability and structural strength of the corrugated liner and the trapezoidal liner, making them more durable and reliable. The bottom of the bottom layer of the corrugated liner and the trapezoidal liner is designed in an arc shape, which helps the corrugated liner and the trapezoidal liner to better fit the inner wall of the ball mill, reduce gaps and friction, improve grinding efficiency and reduce wear;
[0023] (4) The utility model proposes a polyurethane composite liner for a ball mill, which forms a wave-like structure through the grooves and protrusions on the surface layer of the corrugated liner, thereby increasing the surface area of contact between the material and the liner, so as to change the movement trajectory of the material in the ball mill, increase the tumbling, ejection and grinding times of the material, and help the particles to be more evenly subjected to the force, thereby improving the grinding effect and product uniformity;
[0024] (5) The utility model proposes a polyurethane composite liner for a ball mill, which forms a trapezoidal structure through the protrusions on the surface layer of the trapezoidal liner. The setting of the trapezoidal structure changes the flow path and direction of the material on the liner surface, avoids the accumulation and aggregation of materials in certain areas, is beneficial to the fluidity and mixing uniformity of the materials, improves the quality of the product and reduces the formation of fine powder;
[0025] (6) The utility model proposes a polyurethane composite liner for a ball mill, which can be firmly fixed on the inner wall of the ball mill through the fixed through hole, ensuring that the liner will not shift or shake during operation, thereby maintaining the stability and continuity of the sanding process. Since the contact between the liner and the inner wall of the ball mill is closer, the noise and vibration caused by friction and vibration are reduced, the working environment is improved, and the operating noise of the equipment is reduced;
[0026] (6) The utility model proposes a polyurethane composite liner for a ball mill, which uses polyurethane as the liner material. Compared with metal, polyurethane is softer, which can reduce vibration and noise during the operation of the ball mill; more wear-resistant, which can slow down the wear rate of the liner; more corrosion-resistant, which can be used stably for a long time in harsh environments such as humidity, acid and alkali; lower density, so it is lighter and easier to install and replace; lower thermal conductivity, which can reduce energy conduction loss, reduce energy consumption of equipment, and thus save energy costs. At the same time, polyurethane can better absorb and disperse the impact force generated during the grinding process, thereby reducing the direct transmission of the impact force to the grinding medium, playing a good buffering role, and reducing the phenomenon of excessive material crushing;
[0027] (7) The utility model proposes a ball mill, which uses a combination of liner plates to subject materials to grinding and pressure in more directions, thereby helping to form finer and more uniform particles. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0029] Figure 1 This is a schematic diagram of the structure of a corrugated lining plate of a polyurethane composite lining plate for a ball mill proposed by the utility model;
[0030] Figure 2 This is a cross-sectional schematic diagram of a corrugated liner of a polyurethane composite liner for a ball mill proposed by the utility model;
[0031] Figure 3 This is a schematic diagram of a trapezoidal lining structure of a polyurethane composite lining for a ball mill proposed by the utility model;
[0032] Figure 4 This is a cross-sectional schematic diagram of a trapezoidal liner of a polyurethane composite liner for a ball mill proposed by the utility model;
[0033] Figure 5This is a schematic diagram of the installation of a polyurethane composite liner for a ball mill proposed by the utility model;
[0034] In the figure, 1-corrugated lining, 2-bottom layer, 3-middle layer, 4-surface layer of the corrugated lining, 5-groove, 6-protrusion, 7-fixing through hole, 8-trapezoidal lining, 9-surface layer of the trapezoidal lining. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0036] Example 1
[0037] refer to Figure 1-Figure 5 The present embodiment proposes a polyurethane composite liner for a ball mill, comprising a corrugated liner 1 and a trapezoidal liner 8.
[0038] The corrugated lining 1 includes a bottom layer 2, an intermediate layer 3 and a surface layer arranged in sequence from bottom to top; wherein, the bottom layer 2 and the intermediate layer 3 of the corrugated lining 1 are rectangular structures, the design of the rectangular structure is relatively simple and stable, and can provide good support and bearing capacity to ensure the stability of the lining, the bottom layer 2 and the intermediate layer 3 are fixedly connected, the bottom of the bottom layer 2 is arc-shaped for fitting the inner wall of the ball mill, the surface layer 4 of the corrugated lining is provided with a plurality of grooves 5, and protrusions 6 are provided between the grooves 5, and each of the grooves 5 and the protrusions 6 extends along the length direction of the corrugated lining 1. In this embodiment, the hardness, particle size and physical properties of different raw materials are different. By adjusting the size of the grooves 5 and the protrusions 6, it is possible to better adapt to the characteristics of the raw materials and improve the grinding efficiency. Harder raw materials require deeper grooves 5 and higher protrusions 6 to increase the grinding force and contact area. The surface layer and the intermediate layer 3 are fixedly connected. It should be made clear that the corrugated lining 1 is actually a whole. By dividing the corrugated lining 1 into the bottom layer 2, the middle layer 3 and the surface layer, the role of each layer in the overall structure can be described in detail. The bottom layer 2 is used to fit the inner wall of the ball mill, the middle layer 3 provides support and connection, and the surface layer is responsible for direct contact and grinding of materials. The layered description makes the function of the corrugated lining 1 clearer and helps to understand the structure of the corrugated lining 1.
[0039] The trapezoidal lining plate 8 comprises a bottom layer 2, an intermediate layer 3 and a surface layer arranged in sequence from bottom to top. The bottom layer 2 and the intermediate layer 3 of the trapezoidal lining plate 8 are rectangular parallelepiped structures. The design of the rectangular parallelepiped structure is relatively simple and stable, and can provide good support and bearing capacity to ensure the stability of the lining plate. The bottom layer 2 and the intermediate layer 3 are fixedly connected. The bottom of the bottom layer 2 is arc-shaped for fitting the inner wall of the ball mill. The surface layer 9 of the trapezoidal lining plate is provided with a trapezoidal structure. The trapezoidal structure is a symmetrical trapezoid. The two non-parallel edges of the trapezoidal structure are inclined along the width direction of the lining plate. The trapezoidal The structure runs through the surface layer, and the contact area between the material and the surface of the trapezoidal liner 8 is increased by the trapezoidal structure, so that the material is subjected to forces in more directions in the mill, thereby improving the grinding efficiency. The inclined edge of the trapezoidal structure can promote the tumbling and movement of the material, making the grinding process more uniform and sufficient. In this embodiment, the trapezoidal structure used can be a symmetrical edge trapezoidal structure or an asymmetrical edge trapezoidal structure. Specifically, the asymmetrical structure causes the material to be subjected to impact forces in different directions, thereby increasing the impact force during the grinding process, and can crush larger or harder particles and improve the grinding efficiency. At the same time, the asymmetrical structure guides the material to flow in a specific direction to prevent the material from forming a dead angle or stagnant area in the ball mill. This makes the material evenly distributed throughout the grinding chamber and improves the overall grinding effect. The surface layer and the intermediate layer 3 are fixedly connected. It should be clear that the trapezoidal liner 8 is actually a whole. The trapezoidal liner 8 is divided into the bottom layer 2, the intermediate layer 3 and the surface layer, and the role of each layer in the overall structure can be described in detail. The bottom layer 2 is used to fit the inner wall of the ball mill, the middle layer 3 provides support and connection, and the surface layer is responsible for providing the flow path and direction of the material on the surface of the liner. The layered description makes the function of the trapezoidal liner 8 clearer and helps to understand the structure of the trapezoidal liner 8.
[0040] The corrugated lining plate 1 and the trapezoidal lining plate 8 are arranged at intervals, and the head and tail of the corrugated lining plate 1 and the trapezoidal lining plate 8 are aligned with each other. In this embodiment, the corrugated lining plate 1, the corrugated lining plate 1, and the trapezoidal lining plate 8 are arranged in the inner wall of the ball mill. The alternating arrangement of the corrugated lining plate 1 and the trapezoidal lining plate 8 can make the material subject to different grinding forces during the grinding process. At the same time, the combination of the corrugated lining plate 1 and the trapezoidal lining plate 8 can make the wear of the entire lining plate more uniform, thereby extending the service life of the lining plate.
[0041] The size of the ball mill directly affects the design of the liner. For a large ball mill, the corrugation requires more grooves 5 and protrusions 6 to cover a larger grinding surface area, thereby improving the grinding efficiency. On the contrary, for a small ball mill, fewer grooves 5 and protrusions 6 can meet the demand, avoiding material waste and design complexity. In this embodiment, there are three grooves 5, and the three grooves 5 are arranged in parallel. There are two protrusions 6, and the two protrusions 6 are arranged in parallel. The grooves 5 and the protrusions 6 are smoothly connected. The smooth connection between the grooves 5 and the protrusions 6 can reduce the impact and wear of the material on the liner during the grinding process, thereby extending the service life of the liner. The smooth transition design can reduce the stress concentration of the liner and avoid material fatigue and damage caused by stress concentration.
[0042] There are two fixing through holes 7 on the corrugated lining plate 1 and two fixing through holes 7 on the trapezoidal lining plate 8, and the two through holes are evenly distributed along the length direction of the lining plate.
[0043] The corrugated lining plate 1 and the trapezoidal lining plate 8 are made of polyurethane.
[0044] Polyurethane is softer than metal and can reduce vibration and noise during the operation of the ball mill. This is especially important for situations where noise in the production environment needs to be reduced, such as laboratories or factory environments that need to coexist with other equipment.
[0045] Compared with metal materials, polyurethane has better wear resistance and can slow down the wear rate of the liner. This means that the service life of the polyurethane liner is longer, the frequency of liner replacement is reduced, and maintenance costs are reduced.
[0046] Polyurethane has good chemical corrosion resistance and can be used stably for a long time in harsh environments such as humidity, acid and alkali, while metal linings may be damaged by corrosion, affecting the stability and reliability of the equipment.
[0047] Compared with metal, polyurethane has a lower density, so it is lighter and easier to install and replace. This makes the operation more convenient for maintenance personnel and improves the operability of the equipment.
[0048] Polyurethane has a low thermal conductivity, which can reduce energy conduction losses and reduce energy consumption of equipment, thereby saving energy costs.
[0049] Polyurethane has good processing properties and can be processed into various complex corrugated and trapezoidal shapes to meet different process requirements, while metal processing may be more complicated and expensive.
[0050] Example 2
[0051] This embodiment is based on the embodiment 1.
[0052] This embodiment provides a method for installing a combined liner, specifically:
[0053] Determine the installation positions of the corrugated liner 1 and the trapezoidal liner 8, and ensure that the liner arrangement is an alternating arrangement of corrugated liner 1, corrugated liner 1, and trapezoidal liner 8. Clean the inner wall of the ball mill and ensure that the inner wall surface is clean and free of impurities to ensure a tight fit between the liner and the inner wall. Fit the arc-shaped part of the bottom layer 2 of the liner tightly against the inner wall of the ball mill, and align the fixing through hole 7 of the liner with the preset mounting hole on the inner wall of the ball mill. Pass the high-strength bolts through the fixing through hole 7 of the liner and the mounting hole of the inner wall of the ball mill.
[0054] After the bolts pass through the inner wall, install the gaskets and nuts from the outside of the inner wall. Use a torque wrench or other appropriate tools to gradually tighten the nuts so that the liner is tightly fixed on the inner wall of the ball mill. Pay attention to even force to prevent the liner from being damaged due to uneven force.
[0055] Confirm that all bolts and nuts are tightened to ensure that the lining is stable and not loose. Check whether the lining is arranged neatly and positioned correctly, and ensure that the corrugated lining 1 and the trapezoidal lining 8 are arranged alternately and aligned head to tail.
[0056] Final confirmation to ensure that all fasteners are in place and tightened. Ensure that the surface of the liner is flat and not warped, and that the overall arrangement meets the design requirements. Through the evenly distributed fixing through holes 7 and fasteners, the liner can remain stable during the operation of the ball mill, reduce loosening and wear caused by vibration and impact, and extend the service life of the liner. The design of 2 through holes makes the installation process easier, reduces installation time and complexity, and improves installation efficiency. The use of fixing through holes 7 and fasteners ensures the safety of the liner in a high-intensity grinding environment, prevents the liner from shifting or falling off, and ensures the normal operation of the ball mill.
[0057] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the description only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A polyurethane composite liner for a ball mill, characterized in that: It includes a corrugated lining plate and a trapezoidal lining plate, wherein the corrugated lining plate includes a bottom layer, a middle layer and a surface layer arranged in sequence from bottom to top, and the trapezoidal lining plate includes a bottom layer, a middle layer and a surface layer arranged in sequence from bottom to top, the corrugated lining plate and the trapezoidal lining plate are arranged at intervals, the head and tail of the corrugated lining plate and the trapezoidal lining plate are aligned with each other, and the material of the corrugated lining plate and the trapezoidal lining plate is polyurethane.
2. The polyurethane composite liner for a ball mill according to claim 1, characterized in that: The bottom layer and the middle layer of the corrugated lining are rectangular structures, the bottom layer and the middle layer are fixedly connected, the bottom of the bottom layer is arc-shaped for fitting the inner wall of the ball mill, the surface layer of the corrugated lining is provided with a plurality of grooves, protrusions are provided between the grooves, each of the grooves and the protrusions extends along the length direction of the corrugated lining, and the surface layer and the middle layer are fixedly connected.
3. The polyurethane composite liner for a ball mill according to claim 1, characterized in that: The bottom layer and the middle layer of the trapezoidal lining are rectangular structures, the bottom layer and the middle layer are fixedly connected, the bottom of the bottom layer is arc-shaped for fitting the inner wall of the ball mill, the surface layer of the trapezoidal lining is provided with a trapezoidal structure, the trapezoidal structure is a symmetrical trapezoid, the two non-parallel edges of the trapezoidal structure are inclined in the width direction of the lining, the trapezoidal structure runs through the surface layer, and the surface layer and the middle layer are fixedly connected.
4. The polyurethane composite liner for a ball mill according to claim 2, characterized in that: There are six grooves, which are arranged in parallel; there are five protrusions, which are arranged in parallel; and the grooves and protrusions are smoothly connected.
5. The polyurethane composite liner for a ball mill according to claim 2, characterized in that: A fixing through hole is arranged in the middle section of the surface layer of the corrugated lining board. The fixing through hole is circular and penetrates through the thickness of the corrugated lining board.
6. The polyurethane composite liner for a ball mill according to claim 3, characterized in that: A fixing through hole is arranged in the middle section of the surface layer of the trapezoidal lining plate. The fixing through hole is circular and penetrates through the thickness of the trapezoidal lining plate.
7. A polyurethane composite liner for a ball mill according to claim 5 or 6, characterized in that: There are two fixed through holes on the corrugated lining plate and two fixed through holes on the trapezoidal lining plate, and the two through holes are evenly distributed along the length direction of the lining plate.
8. A ball mill, characterized in that: The inner wall of the ball mill is provided with a polyurethane composite lining plate, and the polyurethane composite lining plate is arranged in the form of a corrugated lining plate, a corrugated lining plate, and a trapezoidal lining plate.