Grate ball mill for increased grinding capacity

Abstract

The grate-type ball mill capable of improving grinding capacity of the present invention belongs to the field of mining beneficiation equipment, and comprises a discharge end cover, a center plate and an overflow hole; the center plate is connected with a trumpet-shaped guide column; it also comprises a sector-shaped grate plate and a hollow truncated cone-shaped guard plate; the guard plate is matched and fixedly installed in the discharge end cover, and a heightening support device for increasing the internal space between the grate plate and the discharge end cover and improving the stability of the grate plate is provided on the back of the grate plate; due to the adoption of the above technical scheme, the grate plate is stably and reliably overlapped through the overlap grooves, and the heightening support device is abutted against the guard plate, which can effectively increase the space enclosed by the grate plate and the discharge end cover and improve the stability of the grate plate, the filling rate of steel balls in the space can be increased to 40% to 45%, the hourly grinding capacity of a single machine is increased by 20% to 30%, the service life of the grate plate is increased, and the maximum efficiency of the equipment is brought into play; the structure is simple, the manufacturing cost is low, and the grinding cost per ton of raw ore is reduced by about 30%.

Description

Technical Field

[0001] The invention discloses a grid-type ball mill capable of improving grinding capacity, and belongs to the field of mine dressing equipment. Background Art

[0002] Ball mill is a common mineral processing equipment, mostly used for fine grinding operations in the second or final stage of the process; its processing capacity is limited, and the steel ball filling rate is mostly less than 35%; because the overflow hole is located at the center of the discharge end cover, the space surrounded by the grate plate and the discharge end cover is limited, and the number of steel balls cannot be directly increased, resulting in low grinding processing capacity and high grinding costs.

[0003] The grate plate is prone to deviation due to rotational friction and is a vulnerable component. For this reason, when the distance between the grate plate and the discharge end cover increases, the stability of the grate plate will decrease, making the equipment easy to be damaged, and long-term maintenance will reduce the grinding capacity. Summary of the invention

[0004] The object of the present invention is achieved as follows: a grate-type ball mill capable of improving grinding capacity, comprising a discharge end cover, a center plate and an overflow hole; the center plate is connected to a trumpet-shaped guide column; it also comprises a fan-shaped grate plate and a hollow truncated cone-shaped guard plate; the guard plate is matched and fixedly installed in the discharge end cover, and a heightening support device for increasing the internal space of the grate plate and the discharge end cover and improving the stability of the grate plate is provided on the back of the grate plate, and a plurality of grate plates are overlapped end to end to form a hollow truncated cone-shaped grate panel; the grate panel, the guard plate and the discharge end cover are matched and fixed together by fasteners, and the heightening support device corresponding to the grate panel is matched and abutted on the guard plate; the small head end of the hollow truncated cone-shaped grate panel and the small head end of the hollow truncated cone-shaped guard plate face back to back and face outward; the center plate is matched and fixed at the center of the grate panel.

[0005] The height-increasing support device is an arc-shaped support plate and a vertical support plate, and the grating plate includes a main body; the main body is fan-shaped and is provided with a plurality of transparent feed holes; the long arc-shaped edge portion on the back of the main body is connected with an arc-shaped support plate extending downward so as to protrude from the main body; a vertical support plate with one side higher than the other side running through the main body is provided on the back of the main body, the shortest side of the vertical support plate is connected to the arc-shaped support plate, and the longest side of the vertical support plate is connected to the short arc-shaped side of the main body.

[0006] The two long sides of the body are provided with corresponding overlapping grooves, wherein the overlapping platform of one long side is an upper groove, and the overlapping platform of the other long side is a lower groove; the two adjacent bodies are overlapped together flatly, and the upper groove of one body matches the lower groove of the other body and is clamped together.

[0007] The shortest side of the vertical support plate is connected to and flush with the arc-shaped support plate.

[0008] Multiple lattice panels are overlapped end to end through overlapping grooves to form a hollow truncated cone shaped lattice panel; the lattice panel and the guard plate are fixed together by bolts and nuts; the small end of the truncated cone shaped lattice panel and the small end of the hollow truncated cone shaped guard plate face back to outward.

[0009] A circle of annular grooves is provided at the maximum diameter part of the guard plate, and multiple installation grooves are evenly arranged in the guard plate along the busbar direction; the lattice panel and the guard plate are matched and fixed together, the arc-shaped support plates on the lattice panel are matched and embedded in the annular grooves, and the vertical support plates on the lattice panel are matched and embedded in the corresponding installation grooves.

[0010] The inner side of the guard plate and the inner side of the lattice panel are coated with a wear-resistant layer.

[0011] Due to the adoption of the above technical scheme, the grating plates are stably and reliably overlapped through the overlapping grooves, and the space enclosed by the grating plates and the discharge end cover can be effectively increased by increasing the supporting device to abut against the guard plate, and the stability of the grating plates can be improved. The filling rate of steel balls in the space can be increased to 40% to 45%, and the hourly grinding capacity of a single unit is increased by 20% to 30%, thereby increasing the service life of the grating plates and bringing into play the maximum efficiency of the equipment. The present application has a simple structure and a low production cost, which reduces the grinding cost of a ton of raw ore by about 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific structure of the present invention is given by the following drawings and embodiments:

[0013] Figure 1 It is a structural schematic diagram of the best embodiment of the present application;

[0014] Figure 2 It is a three-dimensional schematic diagram of the front structure of a single lattice plate;

[0015] Figure 3 It is a three-dimensional schematic diagram of the back structure of a single lattice plate;

[0016] Figure 4 It is a schematic diagram of the structure of the discharge end cover and the overflow hole;

[0017] Figure 5 It is a front view structural diagram of the discharge end cover;

[0018] Figure 6 It is a schematic diagram of the assembly structure of the lattice panels, guard plates and discharge end covers.

[0019] Legend: 1. Main body, 2. Feed hole, 3. Screw hole, 4. Overlap groove, 5. Vertical support plate, 6. Arc support plate, 7. Guard plate, 8. Annular groove, 9. Installation groove, 10. Discharge end cover, 11. Overflow hole, 12. Center plate. DETAILED DESCRIPTION

[0020] Example: Figure 1 As shown in FIG. 6 , a grate-type ball mill capable of improving grinding capacity comprises a discharge end cover 10, a center plate 12 and an overflow hole 11; the center plate 12 is connected with a trumpet-shaped guide column; it also comprises a sector-shaped grate plate and a hollow truncated cone-shaped guard plate 7; the guard plate 7 is matched and fixedly installed in the discharge end cover 10, and a heightening support device for increasing the internal space of the grate plate and the discharge end cover 10 and improving the stability of the grate plate is provided on the back of the grate plate, and a plurality of grate plates are overlapped end to end to form a hollow truncated cone-shaped grate panel; the grate panel, the guard plate 7 and the discharge end cover 10 are matched and fixed together by fasteners, and the heightening support device corresponding to the grate panel is matched and abutted on the guard plate 7; the small end of the hollow truncated cone-shaped grate panel and the small end of the hollow truncated cone-shaped guard plate 7 face away from each other and face outward; the center plate 12 is matched and fixed at the center of the grate panel.

[0021] The grating plate includes a main body 1, an arc-shaped support plate 6 and a vertical support plate 5; the main body 1 is fan-shaped and is provided with a plurality of transparent feed holes 2; the long arc-shaped edge portion on the back of the main body 1 is connected with an arc-shaped support plate 6 extending downward so as to protrude from the main body 1; a vertical support plate 5 with one side higher than the other side running through the main body 1 is provided on the back of the main body 1, the shortest side of the vertical support plate 5 is connected to the arc-shaped support plate 6, and the longest side of the vertical support plate 5 is connected to the short arc-shaped side of the main body 1.

[0022] The discharge end cover 10, the center plate 12, the overflow hole 11 and the guide column on the grid-type ball mill are all existing well-known public technologies.

[0023] The fan shape is a figure formed by removing a small fan at the vertex of a large fan, wherein the vertex, angular radian, and angular position of the large fan are consistent with those of the small fan.

[0024] The two long sides of the main body 1 are provided with corresponding overlapping grooves 4, wherein the overlapping platform of one long side is an upper groove, and the overlapping platform of the other long side is a lower groove; the two adjacent main bodies 1 are overlapped together flatly, and the upper groove of one main body 1 is matched and clamped together with the lower groove of the other main body 1.

[0025] The shortest side of the vertical support plate 5 is connected to and flush with the arc-shaped support plate 6 .

[0026] like Figure 5 , 6 As shown, Figure 6 Common parts such as threaded holes, bolts, nuts, etc. are not drawn in the figure; multiple lattice panels are overlapped end to end through overlapping grooves 4 to form a hollow truncated cone-shaped lattice panel; a hollow truncated cone-shaped guard plate 7 is provided on the back side of the lattice panel; the lattice panel and the guard plate 7 are fixed together by the cooperation of bolts and nuts; the small end of the truncated cone-shaped lattice panel and the small end of the hollow truncated cone-shaped guard plate 7 face away from each other and face outward.

[0027] In the prior art, the grating plates are assembled to form a plane, and the ore entering from the feed hole 2 close to the center will quickly flow out from the overflow hole, making it difficult to fully grind, resulting in uneven grinding quality. However, the hollow truncated cone-shaped grating plate with the small end facing outward allows most of the ore to enter from the feed hole 2 on the outer circle, and then fully grind with the steel balls in each independent enlarged space, thereby improving the overall grinding quality and grinding efficiency.

[0028] During installation, the guard plate 7 is fixed in the discharge end cover 10; the countersunk screw is inserted into the screw hole 3 on the vertical support plate 5, passes through the guard plate 7 and the discharge end cover 10, and the outer end is fixed with a nut.

[0029] A circle of annular grooves 8 are provided at the maximum diameter part of the guard plate 7, and multiple installation grooves 9 are evenly provided in the guard plate 7 along the busbar direction; the lattice panel and the guard plate 7 are matched and fixed together, and the arc-shaped support plate 6 on the lattice panel is matched and embedded in the annular groove 8, and the vertical support plate 5 on the lattice panel is matched and embedded in the corresponding installation groove 9.

[0030] Due to the supporting and partitioning effect of the vertical support plate 5, a certain distance is formed between the body 1 and the guard plate 7 of each grating plate, forming a relatively independent space. When the ball mill rotates, the ore enters the relatively independent space formed by the two vertical support plates 5 through the feed hole 2. More steel balls can be put into each independent space, and the ore is ground more fully and faster in the independent space. The steel ball filling rate in the space can be increased to 40% to 45%, and the hourly grinding capacity of a single machine increases by 20% to 30%; the embedding of the arc support plate 6 and the vertical support plate 5 and the guard plate 7 can greatly increase the stability of the grating plate, improve the service life, and give full play to the maximum efficiency of the equipment; the present application has a simple structure and low production cost, which reduces the grinding cost of a ton of raw ore by about 30%.

[0031] In addition, as the distance between the grating plate and the guard plate 7 increases, the stability of the grating plate will inevitably be affected. The arc-shaped support plate 6 on the grating panel is embedded in the annular groove 8, and the vertical support plate 5 on the grating panel is embedded in the corresponding installation groove 9. This can greatly improve the stability of each relatively independent space, enhance the stability of the grating plate during rotation, and increase its service life.

[0032] After grinding, the ore is discharged through the overflow hole 11 at the center of the discharge end cover 10. The present application can put more steel balls in the ball mill to achieve the purpose of improving the grinding capacity. The function of the guard plate 7 is to prevent the ore from wearing the end cover and extend the service life of the ball mill.

Claims

1. A grate-type ball mill capable of improving grinding capacity, comprising a discharge end cover, a center plate and an overflow hole; the center plate is connected to a trumpet-shaped guide column; characterized in that: It also includes a fan-shaped grating plate and a hollow truncated cone-shaped guard plate; the guard plate is matched and fixedly installed in the discharge end cover, and a heightening support device for increasing the internal space of the grating plate and the discharge end cover and improving the stability of the grating plate is provided on the back of the grating plate, and a plurality of grating plates are overlapped end to end to form a hollow truncated cone-shaped grating panel; the grating panel, the guard plate and the discharge end cover are matched and fixed together by fasteners, and the heightening support device corresponding to the grating panel is matched and abutted on the guard plate; the small end of the hollow truncated cone-shaped grating panel and the small end of the hollow truncated cone-shaped guard plate face away from each other and face outward; the center plate is matched and fixed at the center of the grating panel; The height-increasing support device is an arc-shaped support plate and a vertical support plate, and the grating plate includes a body; the body is fan-shaped, and a plurality of transparent feeding holes are arranged on the body; the long arc-shaped side portion on the back of the body is connected to an arc-shaped support plate extending downward so as to protrude from the body; a vertical support plate with one side high and one side low and running through the body is arranged on the back of the body, the shortest side of the vertical support plate is connected to the arc-shaped support plate, and the longest side of the vertical support plate is connected to the short arc-shaped side of the body; A circle of annular grooves is provided at the maximum diameter part of the guard plate, and multiple installation grooves are evenly provided in the guard plate along the generatrix direction; the lattice panels are matched and fixedly installed with the guard plate, and the arc-shaped support plates on the lattice panels are matched and embedded in the annular grooves, and the vertical support plates on the lattice panels are matched and embedded in the corresponding installation grooves; A relatively independent space is formed between the body and the guard plate of each grating plate, and a number of steel balls are placed in the space.

2. The grate ball mill capable of improving grinding capacity according to claim 1, characterized in that: The two long sides of the body are provided with corresponding overlapping grooves, wherein the overlapping groove of one long side is an upper groove, and the overlapping groove of the other long side is a lower groove; the two adjacent bodies are overlapped together flatly, and the upper groove of one body is matched and snapped together with the lower groove of the other body.

3. The grate ball mill capable of improving grinding capacity according to claim 1, characterized in that: The shortest side of the vertical support plate is connected to and flush with the arc-shaped support plate.

4. The grate ball mill capable of improving grinding capacity according to claim 1, 2 or 3, characterized in that: Multiple lattice panels are overlapped end to end through overlapping grooves to form a hollow truncated cone shaped lattice panel; the lattice panel and the guard plate are fixed together by bolts and nuts; the small end of the truncated cone shaped lattice panel and the small end of the hollow truncated cone shaped guard plate face back to outward.

5. The grate ball mill capable of improving grinding capacity according to claim 1, 2 or 3, characterized in that: The inner side of the guard plate and the inner side of the lattice panel are coated with a wear-resistant layer.

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