CN110404638B - Ball mill lining plate structure suitable for superfine ball milling - Google Patents
Ball mill lining plate structure suitable for superfine ball milling Download PDFInfo
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- CN110404638B CN110404638B CN201910805498.1A CN201910805498A CN110404638B CN 110404638 B CN110404638 B CN 110404638B CN 201910805498 A CN201910805498 A CN 201910805498A CN 110404638 B CN110404638 B CN 110404638B
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- lining plate
- ball mill
- lifting
- ball
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/22—Lining for containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/18—Gas flame welding for purposes other than joining parts, e.g. built-up welding
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- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a lining plate structure of a ball mill suitable for superfine ball milling, which comprises a lining plate and a lifting strip arranged on the surface of the lining plate, wherein the lifting strip comprises a trapezoidal substrate and an arc-shaped substrate top formed by upwards extending from the top of the trapezoidal substrate, and the bottom width L of the trapezoidal substrate120-30 mm, high H117-25 mm; bottom width L of arc-shaped roof212-18 mm, high H25-10 mm. The structure and the working parameters of the liner plate lifting strip of the ball mill cylinder are improved, and for the lifting strip structure, the trapezoidal substrate is combined with the arc-shaped liner top, so that the lifting height of the steel ball is proper, the failure abrasion loss at the top end of the arc peak is reduced, and the service life of the liner plate of the cylinder is prolonged; in addition, during installation, the quantity of the lining plate lifting strips and the angles between the lifting strips and the central shaft of the cylinder body are controlled, materials are lifted to a certain height under centrifugal force and then are discharged, the crushing and grinding stripping effects between the steel balls and the materials and between the materials are facilitated, the grinding efficiency is further improved, and the wear rate of the lining plate is remarkably reduced.
Description
Technical Field
The invention relates to a lining plate structure of a ball mill, in particular to a lining plate structure of a ball mill suitable for superfine ball milling, and belongs to the field of superfine ball milling.
Background
The ball mill is used as key equipment for material crushing, and is widely applied to industries such as ores, building materials, metallurgy and the like. With the development of the industry, the requirements of the related fields on the ball milling technology are more severe.
The ball mill is a cylinder structure, a lining plate structure is adhered on the inner side of the cylinder, as shown in fig. 1, a lifting strip 20 is welded on (or cast together with) the lining plate 10, a grinding body (generally, a steel ball) is placed in the ball mill, when the mill rotates, the lifting strip 20 can lift the steel ball to a certain height and then drain down, and the steel ball impacts and grinds materials to enable the materials to be levigated.
The lifter bar, because it is bare, is the most susceptible to wear. The structural size form (parameters such as the height of the lifting bar, the included angle between the lifting bar and the grinding cylinder body and the like) of the ball mill is related to the grinding state of materials in the ball mill cylinder, and the ball milling efficiency and the energy consumption are influenced; on one hand, the height of the steel ball in the radial direction of the grinding cylinder body affects the lifted height of the steel ball, so that the impact force and the grinding capacity of the steel ball on materials are affected; on the other hand, if the length direction of the steel ball forms a certain included angle with the central axial direction of the cylinder body, certain acting force can be generated on the steel ball when the cylinder body of the mill rotates.
In addition, the distribution state of the grinding bodies in the mill is also influenced by the angle between the lifting strips and the axis of the mill, namely whether the materials (steel balls) are distributed at the same horizontal height in the axial direction of the cylinder body of the mill instead of being gathered at one end of the cylinder body. The ball mill barrel is horizontally arranged, steel balls in the mill are usually driven by materials to be accumulated from a feeding end to a discharging end, and the lifting strips and the center of the barrel are axially arranged at a certain angle, so that the accumulation can be prevented, and the steel balls are uniformly distributed in the mill. This "angle" is related to mill diameter, mill speed, steel ball diameter. When the mill speed is constant (usually a fixed value), the "angle" is related to the mill diameter and the steel ball diameter.
In the aspect of superfine ball milling, the specific surface area of the ball-milled materials reaches 600m2More than kg. The superfine ball mill mainly adopts small-sized steel balls (the diameter is less than 10mm) as grinding bodies, and compared with the traditional ball mill, the superfine ball mill has higher requirements on wear resistance and lower requirements on impact resistance.
At present, no lining plate structure suitable for superfine ball milling exists.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a lining plate structure of a ball mill suitable for superfine ball milling, which can effectively improve the ball milling efficiency and reduce the wear rate of a lifting strip.
The technical scheme is as follows: the ball mill lining plate structure suitable for superfine ball milling comprises a lining plate and lifting strips arranged on the surface of the lining plate, wherein each lifting strip comprises a trapezoidal substrate and an arc-shaped substrate top formed by upwards extending from the top of the trapezoidal substrate, and the bottom width L of the trapezoidal substrate120-30 mm, high H117-25 mm; circular arc shapeBottom width L of the roof212-18 mm, high H25-10 mm. The structure of the lining plate lifting strip is improved, the trapezoidal substrate is combined with the arc-shaped liner top, the sizes of the trapezoidal substrate and the arc-shaped liner top are adjusted, the grinding efficiency and the wear resistance can be improved, and meanwhile, the service life of the lining plate is prolonged.
Preferably, the angle A between the length direction of the lifting strips and the central axis of the ball mill cylinder is 2-6 degrees. Further, the number n of the lifting strips in the ball mill and the diameter D of the ball mill satisfy the following relationship: n is (10-14). times.D, wherein the unit of D is meter. The distribution state of the material in the mill is influenced by the angles of the lifting strips and the central shaft of the ball mill, and the steel balls are horizontally distributed in the cylinder body by adjusting the number of the lifting strips and the angles of the lifting strips and the central shaft of the cylinder body, so that the steel balls are prevented from accumulating to the mill tail, the grinding efficiency is further improved, and the wear rate of the lining plate is reduced.
In order to improve the wear resistance of the lining plate, tungsten carbide wear-resistant layers can be arranged on the surfaces of the lining plate and the lifting strips, and the thickness of the tungsten carbide wear-resistant layers is 3-5 mm. Further, the tungsten carbide wear-resistant layer is formed by performing surfacing treatment on the surfaces of the lining plate and the lifting bar, wherein the tungsten carbide is adopted as a welding rod component in the surfacing treatment, and the surfacing operation is performed by using oxyacetylene flame. Specifically, the process conditions of the surfacing treatment are as follows: the surfaces of the lining plate and the lifting strip are polished, derusted and deoiled, then the lining plate and the lifting strip are preheated by oxyacetylene flame, a welding rod and a flame core are kept at 25 degrees during welding, the flame is moved forwards after a surfacing layer is formed, and the distance between the flame core and the lining plate lifting strip is kept at 2-3 mm in the whole process.
Has the advantages that: compared with the prior art, the invention has the following advantages: (1) the structure and the working parameters of the liner plate lifting strip of the ball mill cylinder are improved, and for the lifting strip structure, the trapezoidal substrate is combined with the arc-shaped liner top, so that the lifting height of the steel ball is proper, the failure abrasion loss at the top end of the arc peak is reduced, and the service life of the liner plate of the cylinder is prolonged; (2) in addition, during installation, the number of the lining plate lifting strips is controlled, the lifting strips and the central shaft of the barrel are controlled to form a certain angle, materials are lifted to a certain height under the action of centrifugal force and then are discharged, the crushing and grinding functions between steel balls and the materials and between the materials are facilitated, meanwhile, the steel balls are uniformly distributed in the mill, the grinding efficiency is further improved, and the wear rate of the lining plate is remarkably reduced; (3) the surface of the lining plate lifting strip is subjected to surfacing treatment to form a tungsten carbide wear-resistant layer, so that the wear resistance of the lining plate is improved; because the surfacing process is simple to implement, the surfacing process is beneficial to operation on site and can carry out surfacing for multiple times, thereby obviously prolonging the service life of the lining plate.
Drawings
FIG. 1 is a perspective view of a prior art ball mill liner plate construction, wherein (a) is a general structural drawing and (b) is a partial enlarged view;
FIG. 2 is a cross-sectional view of the liner plate structure of the ball mill of the present invention;
FIG. 3 is a diagram showing the positional relationship between the lift bars and the ball mill cylinder in the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Referring to fig. 2, the lining plate structure of the ball mill suitable for the ultra-fine ball milling of the present invention comprises a lining plate 1 and lifting strips 2 arranged on the surface of the lining plate, wherein the lifting strips 2 can be welded on the lining plate 1 or cast together with the lining plate 1. The lifting strip 2 comprises a trapezoid substrate and an arc-shaped liner top, wherein the arc-shaped liner top is formed by extending upwards from the top of the trapezoid substrate, and the bottom surface of the arc-shaped liner top is the top surface of the trapezoid substrate. Wherein, the size of trapezoidal substrate is: width of bottom L120-30 mm, high H117-25 mm; the dimensions of the circular arc-shaped roof are as follows: width of bottom L212-18 mm, high H25-10 mm, as shown in FIG. 2.
The structure of the lining plate lifting strip is improved, the trapezoidal substrate is combined with the arc-shaped liner top, the size of the trapezoidal substrate and the size of the arc-shaped liner top are adjusted, the grinding efficiency and the wear resistance can be improved, and the service life of the lining plate is prolonged.
As shown in FIG. 3, the angle A between the length direction of the lifting strip of the lining plate and the central shaft of the cylinder body of the ball mill is 2-6 degrees. The number n of the lifting strips in the ball mill and the diameter D of the ball mill satisfy the following relationship: n is (10-14). times.D, wherein the unit of D is meter. The distribution state of the material in the mill is influenced by the angles of the lifting strips and the central shaft of the ball mill, and the steel balls are horizontally distributed in the cylinder body by adjusting the number of the lifting strips and the angles of the lifting strips and the central shaft of the cylinder body, so that the steel balls are prevented from accumulating to the mill tail, the grinding efficiency is further improved, and the wear rate of the lining plate is reduced.
In order to improve the wear resistance of the lining plate, the surfaces of the lining plate and the lifting strip can be subjected to surfacing treatment, the component of a welding rod is tungsten carbide, and the surfacing operation is carried out by using oxyacetylene flame. The process conditions of the surfacing treatment are as follows: polishing the surfaces of the lining plate and the lifting strip, removing rust and oil, preheating by using oxyacetylene flame, keeping the welding rod and the flame core at 25 degrees during welding, moving the flame forward after a surfacing layer is formed, and keeping the distance between the flame core and the lining plate lifting strip to be 2-3 mm in the whole process; the thickness of the formed overlaying layer (tungsten carbide wear-resistant layer) is generally 3-5 mm.
Example 1
In this example, the ball mill cylinder diameter was 3 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 20mm, the height of the trapezoidal substrate is 18mm, the width of the bottom of the arc-shaped substrate top is 12mm, and the height of the arc-shaped substrate top is 7 mm. 30 lifting strips are arranged in the cylinder body of the ball mill, the angle between the lifting strips and the central axis of the surface of the cylinder body is 6 degrees, the rotating speed of the mill is 48rpm, and the filling rate of the materials is 35 percent.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill can improve the yield by 18.4 percent, reduce the energy consumption by 10.2 percent and reduce the wear rate of the lining plate by 22 percent.
Example 2
In this example, the ball mill cylinder diameter was 3.5 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 25mm, the height of the trapezoidal substrate is 20mm, the width of the bottom of the arc-shaped substrate top is 15mm, and the height of the arc-shaped substrate top is 10 mm. 35 lifting strips are arranged in the cylinder body of the ball mill, the angle between the lifting strips and the central axis of the surface of the cylinder body is 5 degrees, the rotating speed of the mill is 48rpm, and the filling rate of the materials is 35 percent.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill can improve the yield by 21.7 percent, reduce the energy consumption by 14.4 percent and reduce the wear rate of the lining plate by 24 percent.
Example 3
In this example, the ball mill cylinder diameter was 4 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 20mm, the height of the trapezoidal substrate is 25mm, the width of the bottom of the arc-shaped substrate top is 18mm, and the height of the arc-shaped substrate top is 5 mm. 40 lifting strips are arranged in the cylinder body of the ball mill, and the angle between the lifting strips and the central axis on the surface of the cylinder body is 3 degrees. The mill speed was 48rpm and the fill of the material was 35%.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill of the embodiment can improve the yield by 24.4 percent, reduce the energy consumption by 16.9 percent and reduce the wear rate of the lining plate by 28 percent
Example 4
In this example, the ball mill cylinder diameter was 4.5 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 30mm, the height of the trapezoidal substrate is 25mm, the width of the bottom of the arc-shaped substrate top is 12mm, and the height of the arc-shaped substrate top is 8 mm. 45 lifting strips are arranged in the cylinder body of the ball mill, and the angle between the lifting strips and the central axis on the surface of the cylinder body is 2 degrees. The mill speed was 48rpm and the fill of the material was 35%.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill can improve the yield by 26.1 percent, reduce the energy consumption by 19.4 percent and reduce the wear rate of the lining plate by 29 percent.
Example 5
In this example, the ball mill cylinder diameter was 4.5 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 30mm, the height of the trapezoidal substrate is 25mm, the width of the bottom of the arc-shaped substrate top is 12mm, and the height of the arc-shaped substrate top is 8 mm. 54 lifting strips are arranged in the cylinder body of the ball mill, and the angle between the lifting strips and the central axis on the surface of the cylinder body is 2 degrees. The mill speed was 48rpm and the fill of the material was 35%.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill can improve the yield by 27.2 percent, reduce the energy consumption by 19.9 percent and reduce the wear rate of the lining plate by 32 percent.
Example 6
In this example, the ball mill cylinder diameter was 4.5 m. The lining plate structure of the ball mill is composed of a lining plate and lifting strips, each lifting strip is composed of a trapezoidal substrate and an arc-shaped substrate top, the width of the bottom of the trapezoidal substrate is 30mm, the height of the trapezoidal substrate is 25mm, the width of the bottom of the arc-shaped substrate top is 12mm, and the height of the arc-shaped substrate top is 8 mm. 63 lifting strips are arranged in the cylinder body of the ball mill, and the angle between the lifting strips and the central axis on the surface of the cylinder body is 2 degrees. The mill speed was 48rpm and the fill of the material was 35%.
Compared with the corrugated lining plate for the conventional superfine mill, the lining plate structure of the ball mill can improve the yield by 25.0 percent, reduce the energy consumption by 18.8 percent and reduce the wear rate of the lining plate by 28 percent.
Claims (6)
1. The utility model provides a ball mill welt structure suitable for superfine ball-milling, its characterized in that, includes welt and sets up the promotion strip on welt surface, and this promotes the strip and includes trapezoidal substrate and upwards extends the convex substrate top that forms from trapezoidal substrate top, the wide L in end of trapezoidal substrate120-30 mm, high H117-25 mm; the bottom width L of the arc-shaped roof liner212-18 mm, high H25-10 mm.
2. The lining plate structure of ball mill suitable for ultra-fine ball milling as claimed in claim 1, wherein the angle A between the length direction of the lifting bar and the central axis of the ball mill cylinder is 2-6 °.
3. The ball mill liner structure suitable for ultra-fine ball milling according to claim 2, wherein the number n of the lifting strips and the ball mill diameter D satisfy the following relationship: n is (10-14). times.D, wherein the unit of D is meter.
4. The ball mill lining plate structure suitable for superfine ball milling of claim 1, wherein the surfaces of the lining plate and the lifting strips are provided with tungsten carbide wear-resistant layers, and the thickness of the tungsten carbide wear-resistant layers is 3-5 mm.
5. The lining plate structure of the ball mill suitable for the superfine ball milling as claimed in claim 4, wherein the tungsten carbide wear-resistant layer is formed by performing surfacing treatment on the surfaces of the lining plate and the lifting bars, wherein the tungsten carbide is adopted as the welding rod component in the surfacing treatment, and the surfacing operation is performed by using oxyacetylene flame.
6. A ball mill liner plate structure suitable for ultra-fine ball milling according to claim 5, wherein the surfacing treatment conditions are as follows: polishing the surfaces of the lining plate and the lifting strip, removing rust and oil, preheating by using oxyacetylene flame, keeping the welding rod and the flame core at 25 degrees during welding, moving the flame forward after a surfacing layer is formed, and keeping the distance between the flame core and the lining plate lifting strip at 2-3 mm in the whole process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910805498.1A CN110404638B (en) | 2019-08-29 | 2019-08-29 | Ball mill lining plate structure suitable for superfine ball milling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910805498.1A CN110404638B (en) | 2019-08-29 | 2019-08-29 | Ball mill lining plate structure suitable for superfine ball milling |
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| CN110404638A CN110404638A (en) | 2019-11-05 |
| CN110404638B true CN110404638B (en) | 2021-04-20 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB317769A (en) * | 1928-08-21 | 1930-11-21 | John Reginald Kueneman | Improvements in or relating to tube mills |
| CN201223817Y (en) * | 2008-07-21 | 2009-04-22 | 昆明茨坝矿山机械有限公司 | Lining board for globe mill barrel |
| CN101947489A (en) * | 2010-10-11 | 2011-01-19 | 湖南红宇耐磨新材料股份有限公司 | Ball grinding mill shell liner provided with grading tendon |
| CN202224218U (en) * | 2011-10-09 | 2012-05-23 | 广东新劲刚超硬材料有限公司 | Lining plate of wear-resistant ball mill, container liner and ball mill |
| CN105750032A (en) * | 2016-04-02 | 2016-07-13 | 山东天汇研磨耐磨技术开发有限公司 | Anti-abrasion lining board for cement ball mill and manufacturing method of anti-abrasion lining board |
| CN105819839A (en) * | 2016-04-02 | 2016-08-03 | 山东天汇研磨耐磨技术开发有限公司 | Wear-resistant ceramic liner for cement ball mill and preparation method of wear-resistant ceramic liner |
| CN205833280U (en) * | 2016-06-24 | 2016-12-28 | 淄博赛纳新材料科技有限公司 | The dedicated ceramic liner plate of cement grinding cylinder |
| CN109499699A (en) * | 2018-12-12 | 2019-03-22 | 长沙见新科技发展有限公司 | A kind of ball grinding machine lining board of compound shape |
-
2019
- 2019-08-29 CN CN201910805498.1A patent/CN110404638B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB317769A (en) * | 1928-08-21 | 1930-11-21 | John Reginald Kueneman | Improvements in or relating to tube mills |
| CN201223817Y (en) * | 2008-07-21 | 2009-04-22 | 昆明茨坝矿山机械有限公司 | Lining board for globe mill barrel |
| CN101947489A (en) * | 2010-10-11 | 2011-01-19 | 湖南红宇耐磨新材料股份有限公司 | Ball grinding mill shell liner provided with grading tendon |
| CN202224218U (en) * | 2011-10-09 | 2012-05-23 | 广东新劲刚超硬材料有限公司 | Lining plate of wear-resistant ball mill, container liner and ball mill |
| CN105750032A (en) * | 2016-04-02 | 2016-07-13 | 山东天汇研磨耐磨技术开发有限公司 | Anti-abrasion lining board for cement ball mill and manufacturing method of anti-abrasion lining board |
| CN105819839A (en) * | 2016-04-02 | 2016-08-03 | 山东天汇研磨耐磨技术开发有限公司 | Wear-resistant ceramic liner for cement ball mill and preparation method of wear-resistant ceramic liner |
| CN205833280U (en) * | 2016-06-24 | 2016-12-28 | 淄博赛纳新材料科技有限公司 | The dedicated ceramic liner plate of cement grinding cylinder |
| CN109499699A (en) * | 2018-12-12 | 2019-03-22 | 长沙见新科技发展有限公司 | A kind of ball grinding machine lining board of compound shape |
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Effective date of registration: 20210923 Address after: 224000 No. 445, group 2, Shengjian village, Yandong Town, Tinghu District, Yancheng City, Jiangsu Province Patentee after: Jiangsu Jinshiyuan New Material Co.,Ltd. Address before: 224051 middle road of hope Avenue, Yancheng City, Jiangsu Province, No. 1 Patentee before: YANCHENG INSTITUTE OF TECHNOLOGY |
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