CN114308287B - Solve lining plate structure of autogenous mill and semi-autogenous mill deformation or fracture - Google Patents
Solve lining plate structure of autogenous mill and semi-autogenous mill deformation or fracture Download PDFInfo
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- CN114308287B CN114308287B CN202111637087.XA CN202111637087A CN114308287B CN 114308287 B CN114308287 B CN 114308287B CN 202111637087 A CN202111637087 A CN 202111637087A CN 114308287 B CN114308287 B CN 114308287B
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Abstract
The invention discloses a lining plate structure for solving the deformation or cracking of an autogenous mill and a semi-autogenous mill, which comprises a lining plate main body, wherein the lining plate main body comprises a base plate and lifting strips; the outer side surface of the substrate is attached to the inner walls of the cylinder body of the autogenous mill and the semi-autogenous mill; the inner side surface of the base plate is provided with depressions which are positioned at the two sides of the lifting strip and can accommodate deformation of a stressed part when the lifting strip is deformed under the action of external force; the lifting bar is provided with a plurality of slots capable of passing through it. The invention arranges the dent on the base plate and arranges a plurality of slots on the lifting strip, when the metal on the surface layer of the lining plate is impacted and expanded, the metal of the expansion part extends into the dent and the slots, so that the expansion amount is accumulated and is separated by the grid grooves and the slots and the expanded and deformed metal is contained, the bulging and deformation of the lining plate caused by large-area accumulation can not be caused, thereby avoiding a series of problems caused by the bulging of the lining plate; the problem of the welt appear bulging deformation, fracture or fracture in the use is solved, can effectively improve the reliability and the life-span of welt.
Description
Technical Field
The invention relates to the technical field of autogenous mills and semi-autogenous mills, in particular to a lining plate structure for solving the deformation or cracking of the autogenous mills and the semi-autogenous mills.
Background
The existing ore grinding equipment, such as a ball mill, an autogenous mill and a semi-autogenous mill, is developed to be larger and larger, particularly the autogenous mill and the semi-autogenous mill have high yield, so that the ore crushing process flow is simplified, and the ore crushing process flow is more and more emphasized by more and more mine enterprises. However, the ore feeding granularity of the autogenous mill and the semi-autogenous mill is large, the used grinding medium balls are also large, and the impact of the ore and the medium balls on the lining plate inside the mill is also large, so that the lining plate is often deformed, cracked, broken by bolts and even broken. The service life of the lining plate of the autogenous mill and the semi-autogenous mill is only half or one third of that of the lining plate of the common small-specification mill. The bolt for fixing the lining plate is broken to easily cause slurry leakage of the mill cylinder body, the lining plate is loosened and even falls off, and the lining plate is broken to easily cause block falling, so that the mill lining plate is scrapped in advance. In order to solve the problem of bolt breakage caused by liner plate deformation, part of mill using enterprises improve the hardness of the liner plate material so as to solve the deformation problem; equipment manufacturers start from the bolt structure and the material strength, and solve the problem of bolt fracture; the problems of deformation and fracture of the lining plate of the autogenous mill semi-autogenous mill and fracture of the bolt for fixing the lining plate seriously affect the start-up rate and the production cost of the mill and cause great trouble to the enterprises using the mill.
The technical inventor observes and analyzes the lining plates of the autogenous mill and the semi-autogenous mill for a long time, finds the reason that the lining plates are easy to deform and crack, because the lining plates are impacted greatly, most of the lining plates of the mill are made of manganese steel, the materials have certain plasticity, the initial state is softer, the hardness and the wear resistance are improved by cold hardening, the lining plates are impacted by steel balls and large ores in the cylinder body of the mill, metal with certain depth on the surface layers of the lining plates is easy to extend all around, the size is increased, deep and outer metal (metal close to the inner wall of the cylinder body of the mill or an end cover) is not extended, the size is not changed, and the metal on the extending layers is mutually pushed to enable the lining plates to bulge towards the inner cavity (the direction of the impact surface). The design of welt medial surface has the arris strip, and the lifting strip is called in the industry, and the lifting strip height is generally higher, and this kind of top layer of lifting strip and welt extends and can make the deformation bigger, causes the welt to the bulging deformation of inner chamber will be more serious. Generally, the thicker the panel, the higher the lifting bar, the longer or wider the panel, the greater the amount of deflection the panel will bulge during use. When the deformation is serious, the bolt for fixing the lining plate can be broken; when the mill works, the impact on the lining plate is in point distribution and asynchronous, a part of surface metal is under tension when the lining plate swells, plastic deformation is generated firstly, when the deformation is overlarge, the part of metal surface can crack and crack (actually, intermetallic extrusion and frequent change of stretching can be generated, cracks which appear in fatigue failure can be generated), along with further increase of the swelling deformation, the surface cracks can also be enlarged and can be expanded to the deep layer of the lining plate, the cracks can also extend to the deep layer of the lining plate under the repeated impact of steel ball ore, and the lining plate can crack or be cracked in addition to the support deficiency caused by swelling of the lining plate, so that the falling blocks fall off, the service life of the lining plate is seriously influenced by the phenomenon, and the operation of equipment is finally influenced. The metal extending phenomenon of the lining plate surface layer with a certain depth is inevitable and advances to the deep part along with the surface layer abrasion.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects and provide a lining plate structure for solving the deformation or cracking of an autogenous mill and a semi-autogenous mill, wherein a substrate is provided with a recess and a plurality of slots are arranged on a lifting strip, when metal on the surface layer of the lining plate is impacted and expanded, the metal of an expansion part extends into the recess and the slots, so that the expansion amount is accumulated and is separated by the recess and the slots and the expanded and deformed metal is contained, the bulging and deformation of the lining plate caused by large-area accumulation can not be caused, and a series of problems caused by the bulging of the lining plate can be avoided; the problem of the welt appear bulging deformation, fracture or fracture in the use is solved, can effectively improve the reliability and the life-span of welt, can effectively solve the problem in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a liner plate structure for solving deformation or cracking of an autogenous mill and a semi-autogenous mill comprises a liner plate main body, wherein the liner plate main body comprises a base plate and lifting strips; the outer side surface of the substrate is attached to the inner walls of the cylinder body of the autogenous mill and the semi-autogenous mill; the inner side surface of the base plate is provided with depressions which are positioned at two sides of the lifting strip and can accommodate deformation of a stressed part when the lifting strip is deformed under the action of external force; the lifting bar is provided with a plurality of slots capable of passing through it.
Preferably, the recesses are regularly arranged, and the plurality of slots are distributed in the length direction of the lifting strip; the depressions are a plurality of longitudinal grooves arranged along the length direction of the substrate or a plurality of transverse grooves or grid grooves or counter bores arranged along the width direction of the substrate.
Preferably, the ratio of the thickness of the substrate to the depth of the recess is 1.5-2; the ratio of the depth of the slot to the height of the lifting strip is 1-1.2.
Preferably, a casting process hole is formed in the bottom of the slot, and the casting process hole is a circular hole, an elliptical hole or a rectangular hole.
Preferably, the included angle between the groove bottom of the groove slot and the horizontal direction is alpha, the included angle alpha is 0-50 degrees, and the lower part of the groove bottom of the groove slot corresponds to the spherical surface of the lifting strip.
Preferably, the two opposite side faces of the slot opening are provided with flanges arranged along the contour line of the lifting strip, and the flanges on the two sides are correspondingly arranged and can block grinding balls from entering the slot opening.
Preferably, the lifting strip is divided into a plurality of disconnecting sections by the plurality of slots, the slots avoid the positions of the bolt holes, and the ratio of the length of the disconnecting sections to the width of the lifting strip is 0.5-3.
Preferably, gaps arranged along the length direction of the lifting strips are further formed in the upper surfaces of the plurality of the breaking sections.
Preferably, the lining plate main body is fixed on the inner walls of the cylinder bodies of the autogenous mill and the semi-autogenous mill through bolts, the lining plate main body is provided with a plurality of bolt holes for bolts to penetrate through, and the bolt holes penetrate through the base plate and the lifting strips.
A method for preparing a lining plate structure for solving the deformation or cracking of an autogenous mill and a semi-autogenous mill comprises the following steps:
(1) Selecting the size of the lining plate main body according to an autogenous mill and a semi-autogenous mill, and casting the lining plate structure by adopting a lost foam;
(2) Carrying out heat treatment on the lining plate structure, heating to 1100 ℃, preserving heat for 4h, cooling to 300 ℃, cooling to room temperature in air, tempering at 550 ℃, and naturally cooling to room temperature;
(3) And filling backfill materials in the grid grooves, the slot slots and the gaps of the lining plate structure, wherein the backfill materials are rubber or concrete mixed with steel wires.
Compared with the prior art, the invention has the beneficial effects that: the base plate is provided with the recess and the lifting strips are provided with the plurality of slots, when the metal on the surface layer of the lining plate is impacted and expanded, the metal of the expansion part extends into the recess and the slots, so that the expansion quantity is accumulated and is cut off by the recess and the slots and the expanded and deformed metal is contained, the bulging and deformation of the lining plate caused by large-area accumulation can not be caused, a series of problems (bolt fracture, lining plate crack, lining plate fragmentation and block falling and the like) caused by the bulging of the lining plate can be avoided, and the expanded metal on the surface layer can be impacted and hardened after entering the recess and the slots; in addition, by arranging the recess and the slot opening, the problem that the central part of the lining plate is not quenched when the section size of the lining plate is overlarge is solved; in order to avoid that the pits, the slots and the gaps can be plugged into the grinding balls to cause that the extended metal can not enter, backfill materials are used for plugging, the backfill materials fall off due to the impact of ores or the grinding balls or the extrusion of the extended metal, and the backfill materials synchronously extend inwards along with the abrasion of the lining plate; thereby solving the problems of bulging deformation, cracking or fracture of the lining plate in the using process and effectively improving the reliability and the service life of the lining plate.
Drawings
FIG. 1 is a first structural diagram of an embodiment of the present invention;
FIG. 2 is a second structural diagram according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 4 is a front view of FIG. 1;
FIG. 5 is an enlarged view of the structure at A in FIG. 4;
FIG. 6 isbase:Sub>A cross-sectional view taken at A-A of FIG. 4;
FIG. 7 is another embodiment ofbase:Sub>A cross-sectional view taken at A-A of FIG. 4;
FIG. 8 is a schematic diagram of a third embodiment of the present invention;
FIG. 9 is a schematic view of a portion of the structure of FIG. 8;
FIG. 10 is a partial schematic view of FIG. 9;
FIG. 11 is a partial cross-sectional structural view of FIG. 9;
FIG. 12 is a diagram showing various structures of the recess.
In the figure: 1 base plate, 1.1 recess, 2 lifting strips, 2.1 bolt holes, 2.2 slots, 2.21 casting process holes, 2.22 flanges, 2.3 breaking sections and 2.4 gaps.
Detailed Description
In the description, it should be understood that, if there is an orientation or a positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., it only corresponds to the drawings of the present invention, and it is convenient to describe the present invention, but does not indicate or imply that the indicated device or element must have a specific orientation.
Referring to fig. 1-12, the present invention provides a technical solution:
as shown in fig. 1 and fig. 2, a liner plate structure for solving deformation or cracking of an autogenous mill and a semi-autogenous mill comprises a liner plate main body, wherein the liner plate main body comprises a base plate 1 and lifting strips 2; the outer side surface of the substrate 1 is attached to the inner walls of the cylinder body of the autogenous mill and the semi-autogenous mill; the inner side surface of the base plate 1 is provided with a recess 1.1 which can accommodate the deformation quantity of the stressed part when the inner side surface is positioned at the two sides of the lifting strip 2 and is deformed under the action of external force; the lifting strip 2 is provided with a plurality of slots 2.2 which can penetrate through the lifting strip, the slots 2.2 are distributed in the length direction of the lifting strip 2, when the metal on the surface layer of the lining plate is impacted and extended, the metal of the extension part extends into the recess 1.1 and the slots 2.2, the extension quantity is accumulated, is separated by the recess 1.1 and the slots 2.2 and contains the metal of the extension deformation, the bulging deformation of the lining plate can not be caused by large-area accumulation, so a series of problems (bolt fracture, lining plate crack, lining plate fragmentation and block falling and the like) caused by the bulging of the lining plate can be avoided, the metal on the surface layer of the extension part can be impact-hardened after entering the recess 1.1 and the slots 2.2, along with the abrasion of the surface of the lining plate, the surface layer of the extension part can be ground, new extension can enter the slot cavities, the circulation is carried out till the lining plate is used and scrapped, the problems of bulging deformation, cracking or breaking of the lining plate in the use process can be solved, and the reliability and the service life of the lining plate can be effectively improved.
The extension cumulant of the wear surface of the substrate 1 can be eliminated by arranging the depressions 1.1 capable of containing the extension deformation metal on the inner side surface of the substrate 1, the depressions 1.1 can be in various forms, specifically, the depressions 1.1 are regularly arranged, the depressions 1.1 are a plurality of longitudinal grooves arranged along the length direction of the substrate 1 or a plurality of transverse grooves or grid grooves or counter bores arranged along the width direction of the substrate 1, and can contain the extension deformation metal, as shown in fig. 12, (1) the depressions are longitudinal grooves, (2) the transverse grooves, (3) the cross grid grooves, (4) the diamond grid grooves, (5) the counter bores (which can be round holes, square holes or elliptical holes), (6) the counter bores are arranged according to the combination specification of different forms.
In order to maintain the overall strength of the substrate 1, the depth of the recess 1.1 should not be too large, the ratio of the thickness of the substrate 1 to the depth of the recess 1.1 is 1.5-2, and specifically, the depth of the recess 1.1 is half of the thickness of the substrate 1.
In order to maintain the overall strength and rigidity of the liner plate, the slot 2.2 cannot penetrate through the bottom, the ratio of the depth of the slot 2.2 to the height of the lifting strip 2 is 1-1.2, and the depth of the slot 2.2 can reach near the surface of the base plate 1 or slightly exceed the surface of the base plate.
As shown in fig. 6 and 7, the groove bottom of the groove slot 2.2 may be straight or have a certain slope, the included angle between the groove bottom of the groove slot 2.2 and the horizontal direction is α, the included angle α is 0 to 5 °, and the lower part of the groove bottom of the groove slot 2.2 corresponds to the ball-facing surface of the lifting bar 2, that is, the ball-facing surface of the lifting bar 2 is seriously worn by impact, and the surface is deep, and the ball-facing surface of the lifting bar 2 is small in impact wear and can be shallow.
As shown in fig. 8, 9, 10 and 11, in order to prevent the slot 2.2 from being plugged with the grinding ball equal to or larger than the width of the slot and affecting the space of the extension deformation part of the lining plate, two opposite side surfaces of the slot 2.2 are respectively provided with a flange 2.22 arranged along the contour line of the lifting strip 2, the flanges 2.22 at two sides are correspondingly arranged and can block the grinding ball from entering the slot 2.2, the thickness of the flange 2.22 can be designed to be 5-35mm, and the flange 2.22 is bent into the slot 2.2 due to impact at the initial use stage of the lining plate;
as shown in fig. 3, the lifting bar 2 is divided into a plurality of breaking sections 2.3 by the plurality of slits 2.2, and the slits 2.2 avoid the positions of the bolt holes 2.1, so as to ensure the connection strength at the positions, and the ratio of the length of the breaking sections 2.3 to the width of the lifting bar 2 is 0.5-3; to large-scale welt, the gap 2.4 that sets up along 2 length direction of lifting strip is still seted up to a plurality of disconnected section 2.3's upper surface, and gap 2.4 is perpendicular with seam 2.2, can solve 2 width direction fracture problems of lifting strip.
In addition, the lining plate main body is fixed on the inner walls of the cylinder bodies of the autogenous mill and the semi-autogenous mill through bolts, the lining plate main body is provided with a plurality of bolt holes 2.1 for bolts to penetrate, and the bolt holes 2.1 penetrate through the base plate 1 and the lifting strips 2.
A method for preparing a lining plate structure for solving the deformation or cracking of an autogenous mill and a semi-autogenous mill comprises the following steps:
(1) Selecting the size of the lining plate main body according to an autogenous mill and a semi-autogenous mill, and casting the lining plate structure by adopting a lost foam; considering the problem of stress concentration at the position, close to the substrate 1, of the root of the slot 2.2, the bottom of the slot 2.2 is provided with a casting process hole 2.21, and the casting process hole 2.21 is a circular hole or an elliptical hole or a rectangular hole, so that the problem of internal stress concentration generated in the casting, heat treatment and using processes can be avoided;
(2) Carrying out heat treatment on the lining plate structure, heating to 1100 ℃, preserving heat for 4h, cooling to 300 ℃, cooling to room temperature in air, tempering at 550 ℃, and naturally cooling to room temperature; through the arrangement of the recess 1.1 and the slot 2.2, the problem that the central part of the lining plate is not quenched completely when the cross section of the lining plate is overlarge in size is solved during heat treatment;
(3) Filling backfill into the recess 1.1, the slot 2.2 and the gap 2.4 of the lining plate structure, wherein the backfill is rubber or concrete mixed with steel wires; the hardness of the concrete is controlled, so that the concrete with a certain depth of the gap falls off due to the impact of ore or grinding balls or the extrusion of expanded metal, the grinding balls cannot enter the inside of the concrete, and the concrete can synchronously extend inwards along with the abrasion of the lining plate.
Offer the line mouth seam and offer sunkenly on the base plate surface through promoting the strip, adopt this principle also to be applicable to barrel welt, end welt, grid plate, on the sieve, promote the strip part to common grid plate, similar welt in the middle of the sieve, actually be the strengthening rib, played the effect that promotes the strip in the use, it is great to receive the impact, the damage mechanism also is caused for top layer metal extension, in view of mainly playing reinforcing rib plate effect, can be with promoting the strip on the extension take in the line mouth seam.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims concerned.
Claims (10)
1. The utility model provides a solve the welt structure of autogenous mill and semi-autogenous mill deformation or fracture, includes the welt main part, its characterized in that: the lining plate main body comprises a base plate (1) and a lifting strip (2); the outer side surface of the substrate (1) is attached to the inner walls of the cylinder body of the autogenous mill and the semi-autogenous mill; the inner side surface of the base plate (1) is provided with a recess (1.1) which is positioned on both sides of the lifting strip (2) and can accommodate the deformation quantity of a stressed part when the base plate is deformed under the action of external force; the lifting strip (2) is provided with a plurality of slots (2.2) which can penetrate through the lifting strip.
2. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: the depressions (1.1) are regularly arranged, and a plurality of slots (2.2) are distributed in the length direction of the lifting strip (2); the depressions (1.1) are a plurality of longitudinal grooves arranged along the length direction of the substrate (1) or a plurality of transverse grooves or grid grooves or counter bores arranged along the width direction of the substrate (1).
3. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: the ratio of the thickness of the substrate (1) to the depth of the recess (1.1) is 1.5-2; the ratio of the depth of the slot (2.2) to the height of the lifting strip (2) is 1-1.2.
4. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: the slot bottom of the slot opening (2.2) is provided with a casting process hole (2.21), and the casting process hole (2.21) is a round hole or an elliptical hole or a rectangular hole.
5. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: the included angle between the groove bottom of the groove slot (2.2) and the horizontal direction is alpha, the included angle alpha is 0-50 degrees, and the lower part of the groove bottom of the groove slot (2.2) corresponds to the incident spherical surface of the lifting strip (2).
6. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: two opposite side faces of the slot opening (2.2) are provided with flanges (2.22) arranged along the contour line of the lifting strip (2), and the flanges (2.22) on two sides are correspondingly arranged and can block grinding balls from entering the slot opening (2.2).
7. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 1, wherein: the lining plate main body is fixed on the inner walls of the cylinder bodies of the autogenous mill and the semi-autogenous mill through bolts, a plurality of bolt holes (2.1) for bolts to penetrate are formed in the lining plate main body, and the bolt holes (2.1) penetrate through the base plate (1) and the lifting strips (2).
8. The liner plate structure for solving deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 7, wherein: the lifting strip (2) is divided into a plurality of disconnecting sections (2.3) by the slots (2.2), the slots (2.2) avoid the positions of the bolt holes (2.1), and the ratio of the length of the disconnecting sections (2.3) to the width of the lifting strip (2) is 0.5-3.
9. The liner plate structure for solving deformation or cracking of an autogenous mill and a semi-autogenous mill according to claim 8, wherein: a plurality of gaps (2.4) arranged along the length direction of the lifting strips (2) are also arranged on the upper surface of the breaking sections (2.3).
10. The method for preparing the lining plate structure for solving the deformation or cracking of the autogenous mill and the semi-autogenous mill according to claim 9 comprises the following steps:
(1) Selecting the size of the lining plate main body according to an autogenous mill and a semi-autogenous mill, and casting the lining plate structure by adopting a lost foam;
(2) Carrying out heat treatment on the lining plate structure, heating to 1100 ℃, preserving heat for 4h, cooling to 300 ℃, cooling to room temperature in air, tempering at 550 ℃, and naturally cooling to room temperature;
(3) And filling backfill into the recess (1.1), the slot (2.2) and the gap (2.4) of the lining plate structure, wherein the backfill is rubber or concrete blended with steel wires.
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| CN202111637087.XA CN114308287B (en) | 2021-12-30 | 2021-12-30 | Solve lining plate structure of autogenous mill and semi-autogenous mill deformation or fracture |
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| CN117983371B (en) * | 2024-04-03 | 2024-07-09 | 隆化县新村矿业有限公司 | Mineral separation equipment and method for recycling extremely low-grade copper minerals from tailings |
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