Semi-autogenous mill discharge end cylinder lining plate lifting strip

Abstract

A semi-autogenous mill discharging end barrel lining plate lifting strip comprises a bottom plate and a variable cross-section lifting strip integrally formed on the upper side of the bottom plate in the length direction of the bottom plate, the two sides of the variable cross-section lifting strip are a material lifting side slope face and a non-material lifting side slope face respectively, the side, away from the bottom plate, of the variable cross-section lifting strip is a slope top, and bolt holes are formed in the variable cross-section lifting strip; the material lifting side slope surface comprises an initial material lifting surface close to the bottom plate and a transition material lifting surface connected with the initial material lifting surface, a connecting line of the initial material lifting surface and the transition material lifting surface protrudes towards the outer side of the variable cross-section lifting strip, and the connecting line is in the length direction of the bottom plate; the variable cross-section lifting strip is divided into a low lifting strip close to the feeding end and a high lifting strip close to the discharging end in the length direction of the variable cross-section lifting strip, and the low lifting strip and the high lifting strip are connected through a lifting strip transition section. According to the semi-autogenous mill discharging end barrel lining plate lifting strip, the treatment capacity is guaranteed, meanwhile, the influence of abrasion on the treatment effect of the lifting strip is relieved, and the service life of the whole discharging end barrel lining plate is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-autogenous mills, and specifically relates to a lifting strip for the cylinder liner at the discharge end of a semi-autogenous mill. Background Art

[0002] As an important part of the mine beneficiation process, the semi-autogenous mill drives the internal materials and steel balls to rotate by its own rotation. The semi-autogenous mill internally contains detachable and replaceable cylinder liners, which not only play a role in protecting the cylinder from the impact of materials and steel balls, but also make the steel balls and materials be thrown up during the rotation of the mill through the inclined surface of its own lifting strip, and then improve the grinding efficiency through impact or grinding.

[0003] With the increasing demand of users for the ore processing capacity, the specifications, feed rate and diameter of steel balls of the mill are also getting larger and larger. At the discharge end of the semi-autogenous mill, due to the action of the pulp lifter, the materials are discharged from the inside of the cylinder, so that the materials at the discharge end are much less than those at the feed end. This will cause large-diameter steel balls to accumulate at the discharge end, and the lifting strips of the cylinder liner at the discharge end are frequently impacted and worn by large-diameter steel balls, resulting in uneven wear of the lifting strips of the cylinder liner of the semi-autogenous mill at the feed end and the discharge end. The existing cylinder liners have the same height of the lifting strips at the inlet and outlet ends. In order to avoid the wear failure of the lifting strips of the discharge-end liner, the height of the lifting strips of the cylinder liner is often increased, but this will lead to the problems of reduced processing capacity and low metal utilization rate of the cylinder liner at the feed end, resulting in a large amount of metal waste and not meeting the current users' requirements for high processing capacity of the mill. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lifting strip for the cylinder liner at the discharge end of a semi-autogenous mill, which can ensure the processing capacity, slow down the influence of wear on the processing effect of the lifting strip, and extend the service life of the entire cylinder liner at the discharge end.

[0005] The technical solution adopted by the utility model is: a lifting strip for the cylinder liner at the discharge end of a semi-autogenous mill, which includes a bottom plate and a variable-section lifting strip integrally formed on the upper side along the length direction of the bottom plate. The two sides of the variable-section lifting strip are respectively a material-lifting side slope surface and a non-material-lifting side slope surface. The side of the variable-section lifting strip away from the bottom plate is the slope top, and bolt holes are provided on the variable-section lifting strip;

[0006] The material-lifting side slope surface includes an initial material-lifting surface close to the bottom plate and a transition material-lifting surface connected to the initial material-lifting surface. The connecting line of the initial material-lifting surface and the transition material-lifting surface protrudes outward from the variable-section lifting strip, and the connecting line is along the length direction of the bottom plate;

[0007] The variable-section lifting strip is divided into a low lifting strip close to the feed end and a high lifting strip close to the discharge end in its length direction, and the low lifting strip and the high lifting strip are connected by a lifting strip transition section.

[0008] As a preferred solution, two feeding-side transition rounded corners are respectively used to connect between the initial feeding surface and the bottom plate, and between the transition feeding surface and the peak of the variable cross-section lifting strip.

[0009] As a preferred solution, both sides of the non-feeding-side slope surface are respectively connected to the bottom plate and the peak through non-feeding-side transition rounded corners.

[0010] As a preferred solution, the bolt hole is located at the peak and penetrates through the variable cross-section lifting strip and the bottom plate at an angle perpendicular to the length direction of the bottom plate;

[0011] A feeding-side thickened section is arranged at the position corresponding to the bolt hole on the feeding-side slope surface, and both ends of the feeding-side thickened section respectively extend and are connected to the peak and the bottom plate.

[0012] As a preferred solution, a boss is arranged at one end of the feeding-side thickened section close to the peak.

[0013] As a preferred solution, lifting lugs are oppositely arranged on the feeding-side slope surface and the non-feeding-side slope surface, and the lifting lugs on the feeding-side slope surface are arranged at intervals with the feeding-side thickened section.

[0014] As a preferred solution, there are two feeding-side thickened sections, which are respectively arranged on the feeding-side slope surfaces where the high lifting strip and the low lifting strip are located.

[0015] As a preferred solution, on the non-feeding-side slope surface, the high lifting strip is thickened relative to the low lifting strip.

[0016] As a preferred solution, a bottom groove is arranged on the bottom surface of the bottom plate.

[0017] As a preferred solution, an installation inclined surface is arranged at one end of the high lifting strip far from the lifting strip transition section.

[0018] The beneficial effects of the present utility model are as follows:

[0019] Based on the defects existing in the prior art, a lifting strip for the discharge end cylinder liner of a semi-autogenous mill is provided. Compared with the prior art:

[0020] 1. The high lifting strip close to the discharge end under the working state will not cause premature wear and failure under the impact of large-diameter steel balls due to its increased height. The height of the low lifting strip close to the feed end is consistent with the lifting strip on the cylinder liner at the feed end. While avoiding waste of metal materials, it can also ensure that the material is thrown to the ideal position, avoid inefficient sliding friction, and improve the output of the mill.

[0021] 2. The feeding side of the cylinder liner adopts a variable surface angle form, which ensures the processing capacity of the mill and also extends the service life of the lifting strip of the discharge end cylinder liner;

[0022] In the initial stage of use, although the width of the initial material lifting surface is small, the inclination angle is large, which can ensure that the material is lifted in place and enable the mill to quickly reach the rated processing capacity range;

[0023] With the use of the lifting strips, the initial material lifting surface gradually wears and changes, and the connecting line shifts towards the top of the slope. During this process, the inclination angle of the newly formed initial material lifting surface gradually decreases, but the width of the initial material lifting surface after the shift gradually increases, still ensuring that the material can be lifted to the predetermined height. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 Isometric schematic diagram of the lifting side angle of the present invention;

[0026] Figure 2 Isometric schematic diagram of the non-lifting side of the present invention;

[0027] Figure 3 Schematic diagram at the end face of the present invention;

[0028] Figure 4 Schematic diagram at the bottom surface of the bottom plate of the present invention.

[0029] Reference numerals: 1, bottom plate; 2, lifting side slope; 201, initial material lifting surface; 202, transition material lifting surface; 203, connecting line; 3, non-lifting side slope; 4, top of the slope; 5, bolt hole; 6, low lifting strip; 7, lifting strip transition section; 8, high lifting strip; 9, lifting side transition fillet; 10, non-lifting side transition fillet; 11, lifting side thickened section; 12, boss; 13, lifting lug; 14, groove; 15, installation inclined surface. Detailed Embodiments

[0030] Next, the present invention will be specifically described through exemplary embodiments. However, it should be understood that without further description, the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments.

[0031] It should be noted that: Unless otherwise defined, the technical terms or scientific terms used in this article shall have the ordinary meanings understood by those with general skills in the field to which this utility model belongs. The words such as "a", "an", or "the" used in the specification and claims of this utility model patent application do not express a limitation of quantity, but mean that there is at least one; the "first", "second", and "third" used in this article should not be regarded as a limitation on the order of components, but only to distinguish different components; words such as "comprising" or "including" indicate that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, but do not exclude other elements or objects with the same functions.

[0032] For a clearer description of the specific structural composition of the discharge end cylinder liner of the semi-autogenous mill, in combination with the attached Figures 1-4 Describe this embodiment:

[0033] As Figure 1 and Figure 2 shown, a lifting strip of the discharge end cylinder liner of a semi-autogenous mill includes a bottom plate 1 and a variable cross-section lifting strip integrally formed on its upper side along the length direction of the bottom plate 1. The two sides of the variable cross-section lifting strip are respectively a material lifting side slope 2 and a non-material lifting side slope 3. The side of the variable cross-section lifting strip away from the bottom plate 1 is a slope top 4. There are bolt holes 5 on the variable cross-section lifting strip. When the mill rotates, the material lifting side slope 2 is relied on to lift the steel balls and materials.

[0034] The material lifting side slope 2 includes an initial material lifting surface 201 close to the bottom plate 1 and a transition material lifting surface 202 connected to the initial material lifting surface 201. The connecting line 203 of the initial material lifting surface 201 and the transition material lifting surface 202 protrudes outward from the variable cross-section lifting strip, and the connecting line 203 is along the length direction of the bottom plate 1. Both the initial material lifting surface 201 and the transition material lifting surface 202 are flat surfaces. Generally, the inclination angle of the initial material lifting surface 201 is greater than that of the transition material lifting surface 202.

[0035] Compared with the existing single-plane material lifting side slope, the material lifting side of this cylinder liner adopts a variable surface angle form, which not only ensures the processing capacity of the mill but also extends the service life of the lifting strip of the discharge end cylinder liner; in the initial stage of use, although the width of the initial material lifting surface 201 is small, the inclination angle is large, which can ensure that the materials are lifted in place and enable the mill to quickly reach the rated processing capacity range; as the lifting strip is used, the initial material lifting surface 201 gradually wears and changes, and the connecting line 203 shifts towards the slope top 4 (along Figure 1 the direction indicated by the arrow, the width of the transition material lifting surface 202 gradually decreases until it disappears). During this process, the inclination angle of the newly formed initial material lifting surface gradually decreases, but the width of the initial material lifting surface 201 after shifting gradually increases, and it can still ensure that the materials are lifted to the predetermined height.

[0036] The variable cross-section lifting strip is divided into a low lifting strip 6 near the feeding end and a high lifting strip 8 near the discharging end in its length direction. The low lifting strip 6 and the high lifting strip 8 are connected by a lifting strip transition section 7. In the working state, due to the increase in height, the high lifting strip 8 near the discharging end will not cause premature wear and failure under the impact of large-diameter steel balls. The height of the low lifting strip 6 near the feeding end is consistent with the lifting strip on the cylinder liner at the feeding end, which can avoid waste of metal materials, ensure that the material is thrown to the ideal position, avoid inefficient sliding friction, and improve the output of the mill.

[0037] As Figure 1 shown, the initial lifting surface 201 and the bottom plate 1, as well as the transition lifting surface 202 and the top of the slope 4 of the variable cross-section lifting strip, are respectively connected by two lifting side transition rounded corners 9; as Figure 2 shown, both sides of the non-lifting side slope 3 are respectively connected to the bottom plate 1 and the top of the slope 4 by non-lifting side transition rounded corners 10. The setting of the transition rounded corners makes the connections of the lifting surface and the non-lifting surface smoother.

[0038] The lifting strip is connected to the cylinder liner by bolts to form an integral body. The bolt holes 5 are located at the top of the slope 4 and penetrate through the variable cross-section lifting strip and the bottom plate 1 at an angle perpendicular to the length direction of the bottom plate 1; due to the setting of the bolts, a lifting side thickened section 11 is provided at the position corresponding to the bolt holes 5 on the lifting side slope 2 to protect the bolts from premature wear and loosening. At the same time, the lifting side thickened section 11 increases the width of the top of the slope 4 at the corresponding position, providing more layout space for the bolt holes and bolts, and preventing the bolts or nuts from protruding from both sides of the top of the slope. The two ends of the lifting side thickened section 11 respectively extend and are connected to the top of the slope 4 and the bottom plate 1;

[0039] Specifically, there are two lifting side thickened sections 11, which are respectively arranged on the lifting side slopes 2 where the high lifting strip 8 and the low lifting strip 6 are located, to ensure the stability of the bolt connection;

[0040] Refer to Figure 3 , on the non-lifting side slope 3, the high lifting strip 8 is thickened relative to the low lifting strip 6. After thickening, the width of the top of the slope 4 of the high lifting strip 8 is increased, which provides more layout space for the bolt holes and bolts on the one hand, and is resistant to wear by large-diameter steel balls on the other hand.

[0041] Refer to Figure 1 , after the bolts are installed, a part of them is still exposed outside the bolt holes. In order to further protect the exposed part of the bolts and the bolt holes 5, a convex platform 12 is provided at one end of the lifting side thickened section 11 close to the top of the slope 4. In the working state, it can reduce the impact of the steel balls and materials on one side of the lifting side slope 2 on the exposed part of the bolts.

[0042] Lifting lugs 13 are oppositely arranged on the material lifting side slope 2 and the non-material lifting side slope 3 for hoisting. In order to ensure uniform mass distribution, on the material lifting side slope 2, the lifting lugs 13 are arranged at intervals with the thickened section 11 on the material lifting side.

[0043] Refer to Figure 4 , a bottom groove 14 is provided on the bottom surface of the bottom plate 1 to achieve a certain weight reduction.

[0044] Refer to Figure 1 , an installation inclined surface 15 is provided at one end of the high lifting strip 8 away from the lifting strip transition section 7. There are multiple groups of lifting strips on the cylinder liner along the feed end to the discharge end of the semi-autogenous mill cylinder. Near the discharge end, in addition to the cylinder liner at the discharge end, there is also a liner on the end cover inclined surface. After the installation inclined surface 15 is provided, the cross-section of the discharge end of the high lifting strip 8 is reduced, reducing the shielding of the lifting strip on the end cover inclined surface liner, and facilitating the disassembly of the lifting strips at various positions.

[0045] The parts not detailed in this embodiment are prior art.

[0046] It should be noted that although the present invention has been described through the above embodiments, the present invention can also have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope protected by the appended claims of the present invention and their equivalents.

Claims

1. A lifting strip for the lining plate at the discharge end of a semi-autogenous mill, characterized in that: It includes a bottom plate (1) and a variable cross-section lifting strip integrally formed on its upper side along the length direction of the bottom plate (1). On both sides of the variable cross-section lifting strip are a material-lifting side slope surface (2) and a non-material-lifting side slope surface (3) respectively. The side of the variable cross-section lifting strip away from the bottom plate (1) is the slope top (4), and bolt holes (5) are provided on the variable cross-section lifting strip; The material-lifting side slope surface (2) includes an initial material-lifting surface (201) close to the bottom plate (1) and a transition material-lifting surface (202) connected to the initial material-lifting surface (201). The connecting line (203) of the initial material-lifting surface (201) and the transition material-lifting surface (202) bulges outward from the variable cross-section lifting strip, and the connecting line (203) is along the length direction of the bottom plate (1); The variable cross-section lifting strip is divided into a low lifting strip (6) close to the feeding end and a high lifting strip (8) close to the discharging end in its length direction. The low lifting strip (6) and the high lifting strip (8) are connected by a lifting strip transition section (7).

2. The lifting strip of the cylinder liner at the discharge end of the semi-autogenous mill according to claim 1, wherein: Both between the initial material-lifting surface (201) and the bottom plate (1) and between the transition material-lifting surface (202) and the slope top (4) of the variable cross-section lifting strip are connected by two material-lifting side transition fillets (9).

3. The lifting strip of the cylinder liner at the discharge end of the semi-autogenous mill according to claim 1, wherein: Both sides of the non-material-lifting side slope surface (3) are connected to the bottom plate (1) and the slope top (4) by non-material-lifting side transition fillets (10).

4. A lifting strip for the lining plate at the discharge end of a semi-autogenous mill according to claim 1, characterized in that: The bolt holes (5) are located at the slope top (4) and penetrate through the variable cross-section lifting strip and the bottom plate (1) at an angle perpendicular to the length direction of the bottom plate (1); At the position corresponding to the bolt holes (5) on the material-lifting side slope surface (2), a material-lifting side thickened section (11) is provided. The two ends of the material-lifting side thickened section (11) extend and are connected to the slope top (4) and the bottom plate (1) respectively.

5. The lifting strip of the discharge end cylinder liner of a semi-autogenous mill according to claim 4, wherein: A boss (12) is provided at one end of the material-lifting side thickened section (11) close to the slope top (4).

6. The lifting strip of the discharge end cylinder liner of a semi-autogenous mill according to claim 4, characterized in that: Lifting lugs (13) are oppositely arranged on the material-lifting side slope surface (2) and the non-material-lifting side slope surface (3), and the lifting lugs (13) on the material-lifting side slope surface (2) are arranged at intervals with the material-lifting side thickened section (11).

7. The lifting strip of the discharge end cylinder liner of a semi-autogenous mill according to claim 4, wherein: There are two material-lifting side thickened sections (11), which are respectively arranged on the material-lifting side slope surfaces (2) where the high lifting strip (8) and the low lifting strip (6) are located.

8. The lifting strip of the discharge end cylinder liner of a semi-autogenous mill according to claim 1, wherein: On the non-material-lifting side slope surface (3), the high lifting strip (8) is thickened relative to the low lifting strip (6).

9. The lifting strip of the cylinder liner at the discharge end of the semi-autogenous mill according to claim 1, wherein: A bottom groove (14) is provided on the bottom surface of the bottom plate (1).

10. The lifting strip of the cylinder liner at the discharge end of the semi-autogenous mill according to claim 1, wherein: An installation inclined surface (15) is provided at one end of the high lifting strip (8) away from the lifting strip transition section (7).

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